{"product_id":"2-pin-9-5mm-high-current-fuse-protector-connector-oem-7123-4129-90-7122-4129-900","title":"2-Pin 9.5mm High-Current Fuse Protector Connector – OEM 7123-4129-90 \/ 7122-4129-900 | Sumitomo","description":"\u003ch2\u003e2-Pin 9.5mm High-Current Fuse Protector Connector – OEM 7123-4129-90 \/ 7122-4129-900 | Sumitomo\u003c\/h2\u003e\n\n\u003cp\u003eOEM-specification 2-pin high-current connector for automotive fuse protector and power distribution harness applications. Cross-references Sumitomo part numbers \u003cstrong\u003e7123-4129-90\u003c\/strong\u003e (male\/plug side) and \u003cstrong\u003e7122-4129-900\u003c\/strong\u003e (female\/socket side). The 9.5mm terminal pitch is the automotive standard for high-current fuse and main relay circuits, providing the contact area required for battery feed, main fuse, and fusible link connections. Available bare or with pre-wired leads.\u003c\/p\u003e\n\n\u003ch2\u003eWhy High-Current Connector Pitch Matters\u003c\/h2\u003e\n\n\u003cp\u003eThe 9.5mm pitch is used exclusively for the highest-current circuits in the vehicle — battery feeds, main fuses, fusible links, and alternator output connections. The large terminal contact area minimises contact resistance, which is critical because even a small increase in resistance at a high-current connection causes significant voltage drop and heat generation. A corroded 9.5mm fuse connector can cause:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVoltage drop across the fuse connection, causing downstream circuits to receive insufficient voltage\u003c\/li\u003e\n\u003cli\u003eHeat generation at the connector, melting the housing or causing a fire risk\u003c\/li\u003e\n\u003cli\u003eIntermittent power loss to the fuse box, causing multiple unrelated circuits to fail simultaneously\u003c\/li\u003e\n\u003cli\u003eFalse fuse blow — the fuse blows due to heat from the corroded connection rather than an actual overcurrent fault\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7123-4129-90\u003c\/td\u003e\n\u003ctd\u003eMale (plug side) — fuse \/ component side\u003c\/td\u003e\n\u003ctd\u003eSumitomo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7122-4129-900\u003c\/td\u003e\n\u003ctd\u003eFemale (socket side) — harness side\u003c\/td\u003e\n\u003ctd\u003eSumitomo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCircuit Function\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePin\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003cth\u003eCurrent Rating\u003c\/th\u003e\n\u003cth\u003eFailure Symptom if Corroded\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eHigh-current power input (battery feed \/ fuse input)\u003c\/td\u003e\n\u003ctd\u003eUp to 80A+\u003c\/td\u003e\n\u003ctd\u003eVoltage drop, heat generation, multiple circuit failures\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eHigh-current power output (fuse output \/ load feed)\u003c\/td\u003e\n\u003ctd\u003eUp to 80A+\u003c\/td\u003e\n\u003ctd\u003eProtected circuit not receiving power, false fuse blow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003e2-Pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Numbers\u003c\/td\u003e\n\u003ctd\u003e7123-4129-90 \/ 7122-4129-900 (Sumitomo)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Pitch\u003c\/td\u003e\n\u003ctd\u003e9.5mm (high-current automotive standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating\u003c\/td\u003e\n\u003ctd\u003eHigh-current (fuse protector \/ main relay application)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eHigh-temp nylon (PA66), heat-resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Material\u003c\/td\u003e\n\u003ctd\u003eCopper alloy, tin-plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Option\u003c\/td\u003e\n\u003ctd\u003eBare connector \/ pre-wired leads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eFuse protector harness, main relay harness, power distribution harness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eAutomotive Terminal Pitch Comparison\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch\u003c\/th\u003e\n\u003cth\u003eTypical Application\u003c\/th\u003e\n\u003cth\u003eCurrent Range\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.0–1.5mm\u003c\/td\u003e\n\u003ctd\u003eECU signal circuits, CAN bus\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2.8mm\u003c\/td\u003e\n\u003ctd\u003eSensor signals, low-current control\u003c\/td\u003e\n\u003ctd\u003e5–15A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6.3mm\u003c\/td\u003e\n\u003ctd\u003eIgnition switch, relay coils, medium-current\u003c\/td\u003e\n\u003ctd\u003e15–30A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e9.5mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eFuse protectors, main relays, battery feeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e30–100A+\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eAutomotive fuse box main feed connector\u003c\/li\u003e\n\u003cli\u003eFusible link and main fuse harness\u003c\/li\u003e\n\u003cli\u003eMain relay power distribution harness\u003c\/li\u003e\n\u003cli\u003eAlternator output and battery feed harness\u003c\/li\u003e\n\u003cli\u003eAftermarket high-current wiring harness builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Multiple unrelated circuits are failing simultaneously — could it be the fuse connector?\u003c\/strong\u003e\u003cbr\u003eA: Yes. A corroded 9.5mm fuse protector connector causes voltage drop on the main power feed, which affects all circuits downstream of that fuse. Multiple simultaneous circuit failures from different systems (engine, body, lighting) with no single fault code pointing to one system is a classic sign of a corroded main fuse or power distribution connector.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: My fuse keeps blowing but there is no short circuit — what is causing it?\u003c\/strong\u003e\u003cbr\u003eA: A corroded high-current connector generates heat due to increased contact resistance. This heat can cause the fuse to blow at normal operating current — a condition called “thermal blow” rather than overcurrent blow. If the fuse blows repeatedly with no identifiable short circuit, inspect the 9.5mm connector before replacing the fuse or wiring.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Are terminals included?\u003c\/strong\u003e\u003cbr\u003eA: Yes, terminals are included with all variants.\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"female male with Pin \/ 1 Pcs","offer_id":47838255022325,"sku":"14:350686#female male with Pin;380:202835807#1 Pcs","price":30.58,"currency_code":"USD","in_stock":true},{"title":"female with Pin \/ 1 Pcs","offer_id":47838255055093,"sku":"14:350852#female with Pin;380:202835807#1 Pcs","price":15.4,"currency_code":"USD","in_stock":true},{"title":"male with Pin \/ 1 Pcs","offer_id":47838255087861,"sku":"14:350853#male with Pin;380:202835807#1 Pcs","price":15.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/S608f500b061f4d55bbea7dd7124a72b3D.webp?v=1773728217","url":"https:\/\/www.csldmcml.com\/products\/2-pin-9-5mm-high-current-fuse-protector-connector-oem-7123-4129-90-7122-4129-900","provider":"Cable Parts Online","version":"1.0","type":"link"}