{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"B4B-XH-A(LF)(SN)","brand":"JST","brandSlug":"jst","productSlug":"B4B-XH-ALFSN","canonicalUrl":"https://icsourcedirect.com/jst/B4B-XH-ALFSN","factsUrl":"https://icsourcedirect.com/api/mcp/products/B4B-XH-A(LF)(SN)","rawCanonicalId":null},"summary":{"shortDescription":"JST Sales America Inc., XH series, Board to Cable/Wire header, 4 positions, 2.50mm pitch, shrouded, through hole, tin-plated male pins, detent lock, UL94 V-0.","salesMarkdown":"## 2.50mm Pitch, 4-Pin XH Header — What Bolts In The B4B-XH-A(LF)(SN): This is a JST XH series 4-position male header, 2.50mm pitch, single row, through-hole mount. The shroud is four-wall — it protects the square pins and guides the mating receptacle home. Mates with the JST XH series crimp receptacle housing — the detent lock on this header engages the housing latch for positive retention. No secondary TPA required; the lock holds against moderate vibration in panel wiring or small appliance harnesses. The insulation height of 0.276\" (7.00 mm) clears low-profile components on the daughter board. ## Active Production — Sourcing This BOM Line The part is ROHS3 compliant with a UL94 V-0 nylon 6/6 housing. No official second-source cross-reference exists, but the B4B-XH-AM variant (same pinout, adds a board guide) is a direct functional alternative if alignment aid is needed. ## B4B-XH-A vs B4B-XH-AM — One Feature Delta The B4B-XH-AM adds a board guide feature — a small alignment post on the housing that helps locate the header during assembly. Everything else is identical: 4 positions, 2.50 mm pitch, 3 A, 250 V, tin plating, detent lock, same mated stack height. If your pick-and-place or manual insertion doesn't need the guide, the base part saves the cost of an extra feature.","metaTitle":"B4B-XH-A(LF)(SN) JST XH Header 4-Pin 2.5mm Pitch","metaDescription":"JST XH series 4-position shrouded header, 2.50mm pitch, 3A, 250V, tin-plated contacts, detent lock.","metaKeywords":null},"attributes":{"series":"XH","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Pin Headers, Sockets & Housings","Pin Headers"],"specifications":{"Mfr":"JST Sales America Inc.","Style":"Board to Cable/Wire","Series":"XH","Package":"Bulk","Features":"-","Shrouding":"Shrouded - 4 Wall","Termination":"Press-Fit, Solder","Applications":"-","Contact Type":"Male Pin","Contact Shape":"Square","Mounting Type":"Through Hole","Connector Type":"Header","Fastening Type":"Detent Lock","Number of Rows":"1","Pitch - Mating":"0.098\\\" (2.50mm)","Product Status":"Active","Voltage Rating":"250V","lifecycle_stage":"unknown","Contact Material":"Brass","Insulation Color":"Natural","Insulation Height":"0.276\\\" (7.00mm)","Ingress Protection":"-","Base Product Number":"B4B-XH-A","Insulation Material":"Polyamide (PA66), Nylon 6/6","Number of Positions":"4","Row Spacing - Mating":"-","Contact Finish - Post":"Tin","Contact Length - Post":"0.134\\\" (3.40mm)","Current Rating (Amps)":"3A","Operating Temperature":"-25°C~85°C","Mated Stacking Heights":"9.8mm","Overall Contact Length":"-","Contact Finish - Mating":"Tin","Contact Length - Mating":"-","Number of Positions Loaded":"All","Material Flammability Rating":"UL94 V-0","Contact Finish Thickness - Post":"-","Contact Finish Thickness - Mating":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2100","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.21000","currency":"USD"},{"qty":10,"price":"$0.18000","currency":"USD"},{"qty":100,"price":"$0.13820","currency":"USD"},{"qty":500,"price":"$0.11690","currency":"USD"},{"qty":1000,"price":"$0.09565","currency":"USD"},{"qty":5000,"price":"$0.08502","currency":"USD"},{"qty":10000,"price":"$0.07705","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/040d3621c5a50bd4b218f33f8642bead.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can B4B-XH-A(LF)(SN) be replaced by B4B-XH-AM?","answer":"Yes — the B4B-XH-AM has the same 4 positions, 2.50 mm pitch, 3 A rating, and detent lock. The only difference is the AM variant adds a board guide feature for alignment. Both are active parts with tin-plated contacts."},{"question":"What is the mating connector for B4B-XH-A(LF)(SN)?","answer":"Mates with the JST XH series crimp receptacle housing (e.g., XHP-4 or similar) using the matching crimp terminals. The detent lock on this header engages the housing latch."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/jst/B4B-XH-ALFSN","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/B4B-XH-ALFSN when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:46:37.382Z","lastPublished":"2026-07-22T19:46:37.382Z","indexable":true}}