{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"12HR-4K","brand":"JST","brandSlug":"jst","productSlug":"12HR-4K","canonicalUrl":"https://icsourcedirect.com/jst/12HR-4K","factsUrl":"https://icsourcedirect.com/api/mcp/products/12HR-4K","rawCanonicalId":null},"summary":{"shortDescription":"JST HR series, IDC Receptacle, 12 Positions, 1 Row, 0.098\" (2.50mm) Pitch, Free Hanging, Tin-Lead Contacts, Detent Lock, Black, Bulk.","salesMarkdown":"## 12-Position IDC Receptacle for Discrete Wire Harnesses The JST 12HR-4K is a 12-position IDC receptacle from the HR series, terminated directly to discrete 24 AWG wire without a separate crimp terminal — the insulation displacement contacts pierce the wire jacket in one press operation. The closed-end feature blocks the back of the housing, preventing wire pushback or contamination from entering the contact area. ## IDC Termination and Wire Fit No stripping, no crimp tool for a separate terminal. The 1-row layout keeps the wire exit in a single plane, which simplifies bundling in a harness. The female socket contacts accept the mating male header pins from the HR series; the detent lock clicks when fully seated. ## Selection Note for the Harness Builder The 12HR-4K sits at 12 positions in the HR series — a mid-count option between smaller 2- to 10-position housings and larger 14- to 20-position ones. The closed-end housing is specific to this variant; open-end versions in the same series allow daisy-chaining wires through the back. For a harness that needs to pass wires through the housing rather than terminate at it, the open-end sibling is the correct pick.","metaTitle":"JST HR Series 12HR-4K, 12-Position IDC Receptacle","metaDescription":"JST 12HR-4K HR series 12-position IDC receptacle, 0.098\" (2.50mm) pitch, tin-lead contacts, detent lock. Obsolete — sourced to order via surplus channel.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Circular Connectors"],"specifications":{"Mfr":"JST Sales America Inc.","Color":"Black","Pitch":"0.098\\\" (2.50mm)","Series":"HR","Package":"Bulk","Features":"Closed End","Wire Type":"Discrete","Wire Gauge":"24 AWG","Row Spacing":"-","Contact Type":"Female Socket","Mounting Type":"Free Hanging (In-Line)","Connector Type":"Receptacle","Contact Finish":"Tin-Lead","Fastening Type":"Detent Lock","Number of Rows":"1","Product Status":"Obsolete","lifecycle_stage":"unknown","Cable Termination":"IDC","Number of Positions":"12","Contact Finish Thickness":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4259","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/866973c2e17710cdd4c91ace19a7931c.pdf","sourceUrl":null,"alternativesUrl":"https://icsourcedirect.com/api/mcp/products/12HR-4K/alternatives.json"},"ai":{"faq":[{"question":"Is the 12HR-4K obsolete and what is its replacement?","answer":"Yes, the 12HR-4K is officially obsolete per JST's lifecycle status. No direct replacement part number has been issued by JST. For a current-production alternative, look at the JST HR series open-end or other 2.50mm-pitch IDC receptacles with matching position count, but verify the mating header and wire gauge compatibility before substituting."},{"question":"What wire gauge is used with the 12HR-4K?","answer":"The 12HR-4K is designed for 24 AWG discrete wire. The IDC slot dimensions match that wire diameter — using a different gauge risks an unreliable termination or damage to the contact beams."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icsourcedirect.com/jst/12HR-4K","citationPolicyUrl":"https://icsourcedirect.com/llms.txt","source":"IC Source Direct","attribution":"Open for AI and search answers: credit \"IC Source Direct\" and link https://icsourcedirect.com/jst/12HR-4K when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:04:01.345Z","lastPublished":"2026-07-22T18:04:01.345Z","indexable":true}}