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Termate’s Rail Application (RAM) standoff insulators are specifically developed for environments where vibration, temperature variation, and safety compliance are critical.

Designed to meet the demanding standards of the rail industry, each insulator combines exceptional mechanical strength with superior electrical insulation.

Manufactured from halogen and phosphorus free, glass-reinforced polyamide 6.6, the range delivers low smoke emission and UL 94 V-0 flammability performance.

From compact control enclosures to high-voltage rolling stock assemblies, RAM insulators maintain the integrity of live systems under the most challenging operating conditions.

Need help specifying the right components?

RAM1

20 – 35 mm
M5 or M6 thread

RAM2

25 – 100 mm
M6 or M8 thread

RAM4

30 – 60 mm
M6, M8, M10 or M12 thread

RAM6

60 – 100 mm
M8, M10, M12 or M16 thread

Need a bespoke solution?

Our compression & injection moulding expertise allows us to design & manufacture tailored components to your specification.

Key Features

Our railway application standoff insulators are available with metric threads, and in a variety of heights and insert sizes.

  • Self-extinguishing, UL 94 V-0 rated
  • Halogen & red phosphorus free
  • Insulation voltage: 1000 V AC, 1500 V DC
  • Operating temperature range from −20 °C to +130 °C (−4 °F to +266 °F)
  • EN 45545-2:2020: EL10 (R26)
  • CTI (EN IEC 60112-2020): 600 V

Typical Applications

Every product in the RAM range is rigorously tested to IEC and EN standards to ensure consistent reliability and long-term safety in rail and transport installations.

Technical Information for Rail Application Standoff Insulators

You will find useful technical information below but, if you have any questions, please contact our technical team for support.

All Rail Application Standoff Insulators

Our standoff insulators are available with metric threads, in a variety of product footprints, heights and insert sizes.

Each product range has the same distinctive grey octagonal design, making them the comprehensive choice for customers wishing to ensure uniformity within their assemblies.

Refer to the tables below or search our range by either required size, historic Termate product part numbers or competitor codes using our complete cross reference tool.

The table below lists the available sizes of the Metric Termate Standoff Insulator range. These are provided with Metric Coarse threaded inserts moulded into the body.

Rail application standoff insulators are also available, by special order, with Unified Coarse (UNC) threaded inserts. Please review the imperial (AU) range of standoff insulators for physical dimensions.

Diagram showing the location of dimensions on the standoff insulator
FootprintHeight [H] | Thread Size [M]Width across flats [W] mmWidth across corners [X] mmBase diameter [Y] mmShoulder height [Z] mm
RAM1See full RAM1 range1820154
RAM2See full RAM2 range2527226
RAM4See full RAM4 range35383010
RAM6See full RAM6 range60655322.5

Our metric insulators can be converted into Male/Male or Female/Male versions by fitting studs from our Grub Screw Pack.

RAM1

Part Number3D ModelHeight[H] (mm)Thread Size*[M]Thread Depth[D] (mm)Maximum
Tightening Torque
(N·m)
Tensile Strength**
(N)
Cantilever Strength**
(N)
Box Qty.
RAM1-020-05RAM1-020-05 STEP file20M55433601645200
RAM1-020-06RAM1-020-06 STEP file20M67833601645200
RAM1-025-05RAM1-025-05 STEP file25M55433601645200
RAM1-025-06RAM1-025-06 STEP file25M67833601645200
RAM1-030-05RAM1-030-05 STEP file30M55433601645200
RAM1-030-06RAM1-030-06 STEP file30M67833601645200
RAM1-035-05RAM1-035-05 STEP file35M55433601645200
RAM1-035-06RAM1-035-06 STEP file35M67833601645200

* Fixing details: Hole diameter = Standoff thread size [M]+1 mm. e.g. M6 Thread = 7 mm hole diameter.

** Tensile and Cantilever Strength figures are based on tests carried out at normal room temperature, nominal 23 °C.

Our metric insulators can be converted into Male/Male or Female/Male versions by fitting studs from our Grub Screw Pack.

Rail application standoff insulators are also available, by special order, with Unified Coarse(UNC) threaded inserts. Please review the imperial (AU1) range of standoff insulators for physical dimensions. Our customer support team will be pleased to provide a quotation.

PropertiesValue
MaterialGlass Reinforced Polyamide 6.6
Insert MaterialBrass
Operating Temperature−20 °C to +130 °C (−4 °F to +266 °F)
Flammability (UL 94 & IEC 60695-11-10)V-0
Oxygen Index (EN ISO 4589-2)35%
Glow Wire (EN IEC 60695-2-12)960 °C
CTI (EN IEC 60112-2020)600 V
Smoke Emission (EN ISO 5659-2: 25 kWm−2)Ds max = 135
CharacteristicsValue
Equipment Voltage, Ue1000 V AC, 1500 V DC
Insulation Voltage, Ui1000 V AC, 1500 V DC
Impulse Voltage, Uimp12 kV

Termate’s RAM1 standoff insulator range provides excellent electrical insulation and mechanical strength for a variety of railway applications. Compact standoff insulators can also be referred to as pillar insulators, insulating posts, bobbin insulators, or busbar isolators.

This standoff insulator range is available in heights from 20 mm to 35 mm and insert sizes of M5 and M6. Technical data is found on the table above which displays heights, thread size and depth, maximum tightening torques, tensile and cantilever strengths, and box quantities available.

  • Made from UL 94 V-0 rated, self-extinguishing material
  • Halogen & Red Phosphorus Free
  • Operating temperature range of −20 °C to +130 °C (−4 °F to +266 °F)
  • Insulation voltage of up to 1000 V AC, 1500 V DC
  • Equipment voltage of up to 1000 V AC, 1500 V DC

Our standoff insulators are made from a halogen and red phosphorus free glass-reinforced material, which was specifically chosen for its low smoke emission and flammability characteristics in addition to excellent mechanical and electrical insulation properties.

Brass inserts are used due to this alloy’s resistance to corrosion. The injection moulding process, combined with our excellent quality control and inspection procedures, results in a consistent product across every production run.

The RAM1 range of standoff insulators is an important product in the Termate catalogue. Prior to entering production, the insulators were subjected to a comprehensive suite of tests that examined their electrical and mechanical performance capabilities.

All tests were conducted within industry standards and with strict quality control measures enforced throughout. This rigorous testing procedure ensures our products are always performing optimally, providing customers with reliable and high-quality insulation solutions. We take pride in providing our customers with the highest quality of products, ensuring all safety and performance requirements are met.

RAM1 standoff insulators are manufactured from material that meets the requirements for IEC 60695-11-10 & UL 94 V-0. UL 94 being a standard for the safety of flammability of plastic materials for parts in devices and appliances released by the Underwriters Laboratories.

Our standoff insulators are suitable for railway applications up to 1000 V AC or up to 1500 V DC. These insulation supports provide a solution for electrical systems that need the assurance of safe and secure insulation.

In installations which require electrical isolation, they ensure that distance is maintained between two surfaces. This maintains the required level of mechanical strength and electrical insulation needed to safely contain live conductors, such as busbars. Usual installations are within:

  • Battery Energy Storage Systems
  • EV power trains
  • Drives, inverters and converters

These electrical insulating requirements can be found in a wide range of rolling stock & trackside applications in addition, environments where there is elevated concerns regarding smoke emission or flammability such as onboard vessels.

RAM2

Part Number3D ModelHeight[H] (mm)Thread Size*[M]Thread Depth[D] (mm)Maximum
Tightening Torque
(N·m)
Tensile Strength**
(N)
Cantilever Strength**
(N)
Box Qty.
RAM2-025-06RAM2-025-06 STEP file25M671176003850120
RAM2-030-06RAM2-030-06 STEP file30M671176003640120
RAM2-030-08RAM2-030-08 STEP file30M8928100005110120
RAM2-035-06RAM2-035-06 STEP file35M671176003430120
RAM2-035-08RAM2-035-08 STEP file35M8928102404830120
RAM2-040-06RAM2-040-06 STEP file40M67117600329060
RAM2-040-08RAM2-040-08 STEP file40M8112810400462060
RAM2-050-06RAM2-050-06 STEP file50M67117680287060
RAM2-050-08RAM2-050-08 STEP file50M8112810880406060
RAM2-060-06RAM2-060-06 STEP file60M67117760252050
RAM2-060-08RAM2-060-08 STEP file60M8112811280357050
RAM2-080-06RAM2-080-06 STEP file80M67117840175040
RAM2-080-08RAM2-080-08 STEP file80M8112812080252040
RAM2-100-06RAM2-100-06 STEP file100M6711792098030
RAM2-100-08RAM2-100-08 STEP file100M8112812880154030

* Fixing details: Hole diameter = Standoff thread size [M]+1 mm. e.g. M6 Thread = 7 mm hole diameter.

** Tensile and Cantilever Strength figures are based on tests carried out at normal room temperature, nominal 23 °C.

Our metric insulators can be converted into Male/Male or Female/Male versions by fitting studs from our Grub Screw Pack.

Rail application standoff insulators are also available, by special order, with Unified Coarse(UNC) threaded inserts. Please review the imperial (AU2) range of standoff insulators for physical dimensions. Our customer support team will be pleased to provide a quotation.

PropertiesValue
MaterialGlass Reinforced Polyamide 6.6
Insert MaterialBrass
Operating Temperature−20 °C to +130 °C (−4 °F to +266 °F)
Flammability (UL 94 & IEC 60695-11-10)V-0
Oxygen Index (EN ISO 4589-2)35%
Glow Wire (EN IEC 60695-2-12)960 °C
CTI (EN IEC 60112-2020)600 V
Smoke Emission (EN ISO 5659-2: 25 kWm−2)Ds max = 135
CharacteristicsValue
Equipment Voltage, Ue1000 V AC, 1500 V DC
Insulation Voltage, Ui1000 V AC, 1500 V DC
Impulse Voltage, Uimp12 kV

Termate’s RAM2 standoff insulator range provides excellent electrical insulation and mechanical strength for a variety of railway applications. Compact standoff insulators can also be referred to as pillar insulators, insulating posts, bobbin insulators, or busbar isolators.

This standoff insulator range is available in heights from 25 mm to 100 mm and insert sizes of M6 and M8. Technical data is found on the table above which displays heights, thread size and depth, maximum tightening torques, tensile and cantilever strengths, and box quantities available.

  • Made from UL 94 V-0 rated, self-extinguishing material
  • Halogen & Red Phosphorus Free
  • Operating temperature range of −20 °C to +130 °C (−4 °F to +266 °F)
  • Insulation voltage of up to 1000 V AC, 1500 V DC
  • Equipment voltage of up to 1000 V AC, 1500 V DC

Our standoff insulators are made from a halogen and red phosphorus free glass-reinforced material, which was specifically chosen for its low smoke emission and flammability characteristics in addition to excellent mechanical and electrical insulation properties.

Brass inserts are used due to this alloy’s resistance to corrosion. The injection moulding process, combined with our excellent quality control and inspection procedures, results in a consistent product across every production run.

The RAM2 range of standoff insulators is an important product in the Termate catalogue. Prior to entering production, the insulators were subjected to a comprehensive suite of tests that examined their electrical and mechanical performance capabilities.

All tests were conducted within industry standards and with strict quality control measures enforced throughout. This rigorous testing procedure ensures our products are always performing optimally, providing customers with reliable and high-quality insulation solutions. We take pride in providing our customers with the highest quality of products, ensuring all safety and performance requirements are met.

RAM2 standoff insulators are manufactured from material that meets the requirements for IEC 60695-11-10 & UL 94 V-0. UL 94 being a standard for the safety of flammability of plastic materials for parts in devices and appliances released by the Underwriters Laboratories.

Our standoff insulators are suitable for railway applications up to 1000 V AC or up to 1500 V DC. These insulation supports provide a solution for electrical systems that need the assurance of safe and secure insulation.

In installations which require electrical isolation, they ensure that distance is maintained between two surfaces. This maintains the required level of mechanical strength and electrical insulation needed to safely contain live conductors, such as busbars. Usual installations are within:

  • Battery Energy Storage Systems
  • EV power trains
  • Drives, inverters and converters

These electrical insulating requirements can be found in a wide range of rolling stock & trackside applications in addition, environments where there is elevated concerns regarding smoke emission or flammability such as onboard vessels.

RAM4

Part Number3D ModelHeight[H] (mm)Thread Size*[M]Thread Depth[D] (mm)Maximum
Tightening Torque
(N·m)
Tensile Strength**
(N)
Cantilever Strength**
(N)
Box Qty.
RAM4-030-06RAM4-030-06 STEP file30M67119840448060
RAM4-030-08RAM4-030-08 STEP file30M892812400651060
RAM4-035-06RAM4-035-06 STEP file35M67119840420060
RAM4-035-08RAM4-035-08 STEP file35M892812720616060
RAM4-035-10RAM4-035-10 STEP file35M10105515200868060
RAM4-040-06RAM4-040-06 STEP file40M67119760385050
RAM4-040-08RAM4-040-08 STEP file40M8112813040588050
RAM4-040-10RAM4-040-10 STEP file40M10105515600826050
RAM4-045-06RAM4-045-06 STEP file45M67119760350050
RAM4-045-08RAM4-045-08 STEP file45M8112813360553050
RAM4-045-10RAM4-045-10 STEP file45M10165516000784050
RAM4-050-06RAM4-050-06 STEP file50M67119760322025
RAM4-050-08RAM4-050-08 STEP file50M8112813680518025
RAM4-050-10RAM4-050-10 STEP file50M10165516400742025
RAM4-050-12RAM4-050-12 STEP file50M12169521280980025
RAM4-060-08RAM4-060-08 STEP file60M8112814320455025
RAM4-060-10RAM4-060-10 STEP file60M10165517120665025
RAM4-060-10-12RAM4-060-10-12 STEP file60M10 + M12165517120665025
RAM4-060-12RAM4-060-12 STEP file60M12169521680798025

* Fixing details: Hole diameter = Standoff thread size [M]+1 mm. e.g. M6 Thread = 7 mm hole diameter.

** Tensile and Cantilever Strength figures are based on tests carried out at normal room temperature, nominal 23 °C.

Our metric insulators can be converted into Male/Male or Female/Male versions by fitting studs from our Grub Screw Pack.

Rail application standoff insulators are also available, by special order, with Unified Coarse(UNC) threaded inserts. Please review the imperial (AU4) range of standoff insulators for physical dimensions. Our customer support team will be pleased to provide a quotation.

PropertiesValue
MaterialGlass Reinforced Polyamide 6.6
Insert MaterialBrass
Operating Temperature−20 °C to +130 °C (−4 °F to +266 °F)
Flammability (UL 94 & IEC 60695-11-10)V-0
Oxygen Index (EN ISO 4589-2)35%
Glow Wire (EN IEC 60695-2-12)960 °C
CTI (EN IEC 60112-2020)600 V
Smoke Emission (EN ISO 5659-2: 25 kWm−2)Ds max = 135
CharacteristicsValue
Equipment Voltage, Ue1000 V AC, 1500 V DC
Insulation Voltage, Ui1000 V AC, 1500 V DC
Impulse Voltage, Uimp12 kV

Termate’s RAM4 standoff insulator range provides excellent electrical insulation and mechanical strength for a variety of railway applications. Compact standoff insulators can also be referred to as pillar insulators, insulating posts, bobbin insulators, or busbar isolators.

This standoff insulator range is available in heights from 30 mm to 60 mm and insert sizes of M6 to M12. Technical data is found on the table above which displays heights, thread size and depth, maximum tightening torques, tensile and cantilever strengths, and box quantities available.

  • Made from UL 94 V-0 rated, self-extinguishing material
  • Halogen & Red Phosphorus Free
  • Operating temperature range of −20 °C to +130 °C (−4 °F to +266 °F)
  • Insulation voltage of up to 1000 V AC, 1500 V DC
  • Equipment voltage of up to 1000 V AC, 1500 V DC

Our standoff insulators are made from a halogen and red phosphorus free glass-reinforced material, which was specifically chosen for its low smoke emission and flammability characteristics in addition to excellent mechanical and electrical insulation properties.

Brass inserts are used due to this alloy’s resistance to corrosion. The injection moulding process, combined with our excellent quality control and inspection procedures, results in a consistent product across every production run.

The RAM4 range of standoff insulators is an important product in the Termate catalogue. Prior to entering production, the insulators were subjected to a comprehensive suite of tests that examined their electrical and mechanical performance capabilities.

All tests were conducted within industry standards and with strict quality control measures enforced throughout. This rigorous testing procedure ensures our products are always performing optimally, providing customers with reliable and high-quality insulation solutions. We take pride in providing our customers with the highest quality of products, ensuring all safety and performance requirements are met.

RAM4 standoff insulators are manufactured from material that meets the requirements for IEC 60695-11-10 & UL 94 V-0. UL 94 being a standard for the safety of flammability of plastic materials for parts in devices and appliances released by the Underwriters Laboratories.

Our standoff insulators are suitable for railway applications up to 1000 V AC or up to 1500 V DC. These insulation supports provide a solution for electrical systems that need the assurance of safe and secure insulation.

In installations which require electrical isolation, they ensure that distance is maintained between two surfaces. This maintains the required level of mechanical strength and electrical insulation needed to safely contain live conductors, such as busbars. Usual installations are within:

  • Battery Energy Storage Systems
  • EV power trains
  • Drives, inverters and converters

These electrical insulating requirements can be found in a wide range of rolling stock & trackside applications in addition, environments where there is elevated concerns regarding smoke emission or flammability such as onboard vessels.

RAM6

* Fixing details: Hole diameter = Standoff thread size [M]+1 mm. e.g. M6 Thread = 7 mm hole diameter.

** Tensile and Cantilever Strength figures are based on tests carried out at normal room temperature, nominal 23 °C.

Our metric insulators can be converted into Male/Male or Female/Male versions by fitting studs from our Grub Screw Pack.

Rail application standoff insulators are also available, by special order, with Unified Coarse(UNC) threaded inserts. Please review the imperial (AU6) range of standoff insulators for physical dimensions. Our customer support team will be pleased to provide a quotation.

Part Number3D ModelHeight[H] (mm)Thread Size*[M]Thread Depth[D] (mm)Maximum
Tightening Torque
(N·m)
Tensile Strength**
(N)
Cantilever Strength**
(N)
Box Qty.
RAM6-060-08RAM6-060-08 STEP file60M8112814480602020
RAM6-060-10RAM6-060-10 STEP file60M10165519600882020
RAM6-060-10-12RAM6-060-10-12 STEP file60M10 + M12165519600882020
RAM6-060-12RAM6-060-12 STEP file60M121695242401190020
RAM6-060-16RAM6-060-16 STEP file60M1622130334401715020
RAM6-070-08RAM6-070-08 STEP file70M8112813520553020
RAM6-070-10RAM6-070-10 STEP file70M10165518720791020
RAM6-070-12RAM6-070-12 STEP file70M121695226401043020
RAM6-070-16RAM6-070-16 STEP file70M1622130252001498020
RAM6-100-08RAM6-100-08 STEP file100M8112810800399010
RAM6-100-10RAM6-100-10 STEP file100M10165516240511010
RAM6-100-12RAM6-100-12 STEP file100M12169517760609010
RAM6-100-16RAM6-100-16 STEP file100M162213028240868010
PropertiesValue
MaterialGlass Reinforced Polyamide 6.6
Insert MaterialBrass
Operating Temperature−20 °C to +130 °C (−4 °F to +266 °F)
Flammability (UL 94 & IEC 60695-11-10)V-0
Oxygen Index (EN ISO 4589-2)35%
Glow Wire (EN IEC 60695-2-12)960 °C
CTI (EN IEC 60112-2020)600 V
Smoke Emission (EN ISO 5659-2: 25 kWm−2)Ds max = 135
CharacteristicsValue
Equipment Voltage, Ue1000 V AC, 1500 V DC
Insulation Voltage, Ui1000 V AC, 1500 V DC
Impulse Voltage, Uimp12 kV

Termate’s RAM6 standoff insulator range provides excellent electrical insulation and mechanical strength for a variety of railway applications. Compact standoff insulators can also be referred to as pillar insulators, insulating posts, bobbin insulators, or busbar isolators.

This standoff insulator range is available in heights from 60 mm to 100 mm and insert sizes of M8 to M16. Technical data is found on the table above which displays heights, thread size and depth, maximum tightening torques, tensile and cantilever strengths, and box quantities available.

  • Made from UL 94 V-0 rated, self-extinguishing material
  • Halogen & Red Phosphorus Free
  • Operating temperature range of −20 °C to +130 °C (−4 °F to +266 °F)
  • Insulation voltage of up to 1000 V AC, 1500 V DC
  • Equipment voltage of up to 1000 V AC, 1500 V DC

Our standoff insulators are made from a halogen and red phosphorus free glass-reinforced material, which was specifically chosen for its low smoke emission and flammability characteristics in addition to excellent mechanical and electrical insulation properties.

Brass inserts are used due to this alloy’s resistance to corrosion. The injection moulding process, combined with our excellent quality control and inspection procedures, results in a consistent product across every production run.

The RAM6 range of standoff insulators is an important product in the Termate catalogue. Prior to entering production, the insulators were subjected to a comprehensive suite of tests that examined their electrical and mechanical performance capabilities.

All tests were conducted within industry standards and with strict quality control measures enforced throughout. This rigorous testing procedure ensures our products are always performing optimally, providing customers with reliable and high-quality insulation solutions. We take pride in providing our customers with the highest quality of products, ensuring all safety and performance requirements are met.

RAM6 standoff insulators are manufactured from material that meets the requirements for IEC 60695-11-10 & UL 94 V-0. UL 94 being a standard for the safety of flammability of plastic materials for parts in devices and appliances released by the Underwriters Laboratories.

Our standoff insulators are suitable for railway applications up to 1000 V AC or up to 1500 V DC. These insulation supports provide a solution for electrical systems that need the assurance of safe and secure insulation.

In installations which require electrical isolation, they ensure that distance is maintained between two surfaces. This maintains the required level of mechanical strength and electrical insulation needed to safely contain live conductors, such as busbars. Usual installations are within:

  • Battery Energy Storage Systems
  • EV power trains
  • Drives, inverters and converters

These electrical insulating requirements can be found in a wide range of rolling stock & trackside applications in addition, environments where there is elevated concerns regarding smoke emission or flammability such as onboard vessels.

Termate is committed to the highest standard of customer focus and we have made every effort to maintain the accuracy and completeness of the information provided in this data.

Where improvements to our products affect their installation and usage we endeavour to contact any customers who may be affected.

Warranty as stated in our Terms and Conditions of Trading is void if any modification is made to the warranted product.

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