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Molex KK 254 2.54mm KF2510 Female Single-Head Silicone Cable 22AWG UL3239 200°C 3KV 3A
Molex KK 254 2.54mm KF2510 Female Single-Head Silicone Cable 22AWG UL3239 200°C 3KV 3A
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Molex KK 254 / KF2510 2.54mm Single-Head Silicone Cable — 200°C / 3KV / 3A
The KF2510 single-head silicone cable is the high-temperature variant of the standard KF2510 single-head cable, using UL3239 silicone insulation rated to 200°C, 3KV, and 3A instead of standard UL1007 PVC. It features a Molex KK 254 compatible housing on one end and bare tinned wire on the other. Available in 2P to 12P at 2.54mm pitch.
Key Specifications
- Pitch: 2.54mm (0.1") — compatible with Molex KK 254, KF2510, and all standard 0.1" pin headers
- Pin Count: 2P, 3P, 4P, 5P, 6P, 7P, 8P, 9P, 10P, 11P, 12P
- Wire: 22AWG UL3239 Silicone
- Temperature Rating: 200°C (vs. 80°C for standard UL1007 PVC)
- Voltage Rating: 3KV (vs. 300V for standard UL1007)
- Current Rating: 3A per contact
- Housing: KF2510 / Molex KK 254 compatible female crimp housing, one end
- Other end: Bare tinned wire
- Flexibility: Ultra-flexible silicone jacket — significantly more flexible than PVC at low temperatures
- Compliance: RoHS compliant; UL-certified wire
Why Silicone Instead of PVC?
Standard UL1007 PVC insulation softens and deforms above 80°C, making it unsuitable for wiring near heat sources. UL3239 silicone insulation remains stable up to 200°C and does not emit toxic fumes when exposed to high temperatures. Silicone is also significantly more flexible than PVC at room temperature, making it easier to route in tight spaces and more resistant to fatigue cracking in vibration environments.
Use silicone cable when your wiring passes within 100mm of a heat source rated above 60°C, or when the cable is subject to continuous flexing.
Typical Applications
- 3D printers: Hotend thermistor wiring, heated bed connections, stepper motor wiring near the hotend carriage
- Industrial heating equipment: Temperature sensor wiring, heating element control
- Robotics: Joint wiring subject to continuous flexing and high ambient temperatures
- CNC machines: Spindle motor and servo wiring in high-temperature enclosures
- LED grow lights and high-power LED drivers: Wiring near high-wattage LED modules
- Automotive and motorsport: Engine bay sensor wiring, exhaust temperature sensors
Compatibility
The KF2510 housing on this cable mates with all standard 2.54mm / 0.1" pitch PCB headers including Molex KK 254 Series 4030, 42375, 42376, 42377, 6373, 6410, generic KF2510, and Harwin M20. Not compatible with JST XH (2.5mm pitch).
Frequently Asked Questions
Q: Why does my 3D printer need silicone cable for the hotend?
A: 3D printer hotends operate at 180–300°C. Standard PVC-insulated wire (rated to 80°C) will soften, deform, and potentially short-circuit if routed near the hotend block or heater cartridge. UL3239 silicone cable rated to 200°C is the correct specification for this application.
Q: Is silicone cable more flexible than PVC?
A: Yes. Silicone insulation is significantly softer and more flexible than PVC, especially at low temperatures. This makes it easier to route in tight spaces and more resistant to fatigue cracking in applications with continuous cable movement.
Q: What is the voltage rating of UL3239 silicone cable?
A: 3KV, compared to 300V for standard UL1007 PVC. This makes silicone cable suitable for higher-voltage signal and control applications.
Q: Can I use this cable for standard (non-high-temperature) applications?
A: Yes. Silicone cable is a direct upgrade from PVC in all applications. The only trade-off is higher cost. For standard signal wiring below 80°C, the standard UL1007 PVC cable is sufficient and more economical.
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Molex KK 254 / KF2510 2.54mm Single-Head Silicone Cable — 200°C / 3KV / 3A
The KF2510 single-head silicone cable is the high-temperature variant of the standard KF2510 single-head cable, using UL3239 silicone insulation rated to 200°C, 3KV, and 3A instead of standard UL1007 PVC. It features a Molex KK 254 compatible housing on one end and bare tinned wire on the other. Available in 2P to 12P at 2.54mm pitch.
Key Specifications
- Pitch: 2.54mm (0.1") — compatible with Molex KK 254, KF2510, and all standard 0.1" pin headers
- Pin Count: 2P, 3P, 4P, 5P, 6P, 7P, 8P, 9P, 10P, 11P, 12P
- Wire: 22AWG UL3239 Silicone
- Temperature Rating: 200°C (vs. 80°C for standard UL1007 PVC)
- Voltage Rating: 3KV (vs. 300V for standard UL1007)
- Current Rating: 3A per contact
- Housing: KF2510 / Molex KK 254 compatible female crimp housing, one end
- Other end: Bare tinned wire
- Flexibility: Ultra-flexible silicone jacket — significantly more flexible than PVC at low temperatures
- Compliance: RoHS compliant; UL-certified wire
Why Silicone Instead of PVC?
Standard UL1007 PVC insulation softens and deforms above 80°C, making it unsuitable for wiring near heat sources. UL3239 silicone insulation remains stable up to 200°C and does not emit toxic fumes when exposed to high temperatures. Silicone is also significantly more flexible than PVC at room temperature, making it easier to route in tight spaces and more resistant to fatigue cracking in vibration environments.
Use silicone cable when your wiring passes within 100mm of a heat source rated above 60°C, or when the cable is subject to continuous flexing.
Typical Applications
- 3D printers: Hotend thermistor wiring, heated bed connections, stepper motor wiring near the hotend carriage
- Industrial heating equipment: Temperature sensor wiring, heating element control
- Robotics: Joint wiring subject to continuous flexing and high ambient temperatures
- CNC machines: Spindle motor and servo wiring in high-temperature enclosures
- LED grow lights and high-power LED drivers: Wiring near high-wattage LED modules
- Automotive and motorsport: Engine bay sensor wiring, exhaust temperature sensors
Compatibility
The KF2510 housing on this cable mates with all standard 2.54mm / 0.1" pitch PCB headers including Molex KK 254 Series 4030, 42375, 42376, 42377, 6373, 6410, generic KF2510, and Harwin M20. Not compatible with JST XH (2.5mm pitch).
Frequently Asked Questions
Q: Why does my 3D printer need silicone cable for the hotend?
A: 3D printer hotends operate at 180–300°C. Standard PVC-insulated wire (rated to 80°C) will soften, deform, and potentially short-circuit if routed near the hotend block or heater cartridge. UL3239 silicone cable rated to 200°C is the correct specification for this application.
Q: Is silicone cable more flexible than PVC?
A: Yes. Silicone insulation is significantly softer and more flexible than PVC, especially at low temperatures. This makes it easier to route in tight spaces and more resistant to fatigue cracking in applications with continuous cable movement.
Q: What is the voltage rating of UL3239 silicone cable?
A: 3KV, compared to 300V for standard UL1007 PVC. This makes silicone cable suitable for higher-voltage signal and control applications.
Q: Can I use this cable for standard (non-high-temperature) applications?
A: Yes. Silicone cable is a direct upgrade from PVC in all applications. The only trade-off is higher cost. For standard signal wiring below 80°C, the standard UL1007 PVC cable is sufficient and more economical.
