{"product_id":"molex-kk254-2-54mm-kf2510-2-12pin-reverse-side-head-cable-22awg-ul1007","title":"Molex KK 254 2.54mm KF2510 2-12Pin Reverse-Side-Head Cable 22AWG UL1007","description":"\u003ch2\u003eMolex KK 254 \/ KF2510 2.54mm Reverse-Side-Head Cable — 2P to 12P\u003c\/h2\u003e\u003cp\u003eThe KF2510 reverse-side-head cable features \u003cstrong\u003eMolex KK 254 compatible housings on both ends, with wires exiting from opposite sides\u003c\/strong\u003e of the two connectors. This is the standard configuration for harness extensions and daisy-chain wiring where the cable reverses direction between two boards. Available in \u003cstrong\u003e2P to 12P\u003c\/strong\u003e at 2.54mm pitch.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitch:\u003c\/strong\u003e 2.54mm (0.1\") — compatible with Molex KK 254, KF2510, and all standard 0.1\" pin headers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin Count:\u003c\/strong\u003e 2P, 3P, 4P, 5P, 6P, 7P, 8P, 9P, 10P, 11P, 12P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire:\u003c\/strong\u003e 22AWG UL1007 PVC, rated 80°C \/ 300V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 3A per contact\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing:\u003c\/strong\u003e KF2510 \/ Molex KK 254 compatible female crimp housing, both ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire exit direction:\u003c\/strong\u003e Opposite sides on each connector (reverse orientation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e Positive latch housing on both ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliance:\u003c\/strong\u003e RoHS compliant; UL-certified wire\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReverse-Side vs. Same-Side: Which Do I Need?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReverse-side-head (this product):\u003c\/strong\u003e Wires exit from opposite faces on each connector. The standard harness extension format — use when the cable needs to reverse direction between two boards, or when connecting two headers that face away from each other.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame-side-head:\u003c\/strong\u003e Wires exit from the same face on both connectors. Use for stacked board assemblies where both headers face the same direction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-head:\u003c\/strong\u003e One connector, one bare wire end. Use for wire-to-board termination.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHarness extension cables between PCBs in separate enclosure sections\u003c\/li\u003e\n\u003cli\u003e3D printer motherboard to stepper driver extension\u003c\/li\u003e\n\u003cli\u003eCNC machine control panel to main board wiring\u003c\/li\u003e\n\u003cli\u003eIndustrial sensor daisy-chain harnesses\u003c\/li\u003e\n\u003cli\u003eRobotics inter-module wiring where boards face opposite directions\u003c\/li\u003e\n\u003cli\u003eTest fixture extension cables for production testing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eMates 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. \u003cstrong\u003eNot compatible with JST XH (2.5mm pitch).\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: What does \"reverse-side-head\" mean?\u003c\/strong\u003e\u003cbr\u003eA: The wires exit from opposite faces on the two connector housings. When you hold the cable with both connectors facing you, one opens toward you and the other opens away from you. This is the standard extension cable orientation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Is reverse-side-head the same as a \"straight-through\" extension cable?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Reverse-side-head cables maintain pin-to-pin continuity (pin 1 to pin 1) and are the correct choice for extending an existing KF2510 \/ KK 254 harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the maximum current per pin?\u003c\/strong\u003e\u003cbr\u003eA: 3A per contact with 22AWG UL1007 wire.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I use this for high-temperature wiring near a 3D printer hotend?\u003c\/strong\u003e\u003cbr\u003eA: UL1007 PVC is rated to 80°C. 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