{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BM04B-XASS-TF(LF)(SN)","brand":"JST","brandSlug":"jst","productSlug":"BM04B-XASS-TFLFSN","canonicalUrl":"https://icsourcedirect.com/jst/BM04B-XASS-TFLFSN","factsUrl":"https://icsourcedirect.com/api/mcp/products/BM04B-XASS-TF(LF)(SN)","rawCanonicalId":null},"summary":{"shortDescription":"JST XA series header, order code BM04B-XASS-TF(LF)(SN), 4 positions, single row, 2.50 mm pitch, 3 A, 250 V, tin-plated contacts, surface-mount, shrouded with locking ramp.","salesMarkdown":"## 2.50 mm pitch, 4-position SMD header with locking ramp The BM04B-XASS-TF(LF)(SN) is the 4-circuit member of JST's XA series board-to-cable/wire header line, a shrouded 4-wall surface-mount header with a locking ramp for positive retention. The nylon housing is rated UL94 V-0.","metaTitle":"JST BM04B-XASS-TF(LF)(SN) Header, 4-Pos 2.50mm SMD","metaDescription":"JST XA series header BM04B-XASS-TF(LF)(SN): 4 positions, 2.50mm pitch, 3 A, 250 V, tin-plated contacts, SMD, shrouded, locking ramp, UL94 V-0.","metaKeywords":null},"attributes":{"series":"XA","packageCase":null,"mountingType":null,"rohsStatus":"RoHS Compliant","productStatus":"Active","categoryPath":["Pin Headers, Sockets & Housings","Pin Headers"],"specifications":{"Mfr":"JST Sales America Inc.","Style":"Board to Cable/Wire","Series":"XA","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Solder Retention","Shrouding":"Shrouded - 4 Wall","Termination":"Solder","Applications":"-","Contact Type":"Male Pin","Contact Shape":"Circular","Mounting Type":"Surface Mount","Connector Type":"Header","Fastening Type":"Locking Ramp","Number of Rows":"1","Pitch - Mating":"0.098\\\" (2.50mm)","Product Status":"Active","Voltage Rating":"250V","lifecycle_stage":"unknown","Contact Material":"Copper Alloy","Insulation Color":"Natural","Insulation Height":"0.370\\\" (9.40mm)","Ingress Protection":"-","Base Product Number":"BM04B-XA","Insulation Material":"Polyamide (PA), Nylon","Number of Positions":"4","Row Spacing - Mating":"-","Contact Finish - Post":"Tin","Contact Length - Post":"-","Current Rating (Amps)":"3A","Operating Temperature":"-25°C~85°C","Mated Stacking Heights":"11.9mm","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":"$0.9900","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.99000","currency":"USD"},{"qty":10,"price":"$0.83400","currency":"USD"},{"qty":100,"price":"$0.74860","currency":"USD"},{"qty":500,"price":"$0.61254","currency":"USD"},{"qty":1000,"price":"$0.54447","currency":"USD"},{"qty":1500,"price":"$0.51044","currency":"USD"},{"qty":2500,"price":"$0.49343","currency":"USD"},{"qty":5000,"price":"$0.47641","currency":"USD"},{"qty":12500,"price":"$0.44238","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the pin pitch of JST BM04B-XASS-TF(LF)(SN)?","answer":"The mating pitch is 0.098\" (2.50mm). This is the same pitch as the entire XA series, so the header mates only with 2.50mm-pitch XA crimp housings."},{"question":"Is BM04B-XASS-TF(LF)(SN) surface mount or through hole?","answer":"Surface mount."},{"question":"When sourcing BM04B-XASS-TF(LF)(SN), what's the closest functional alternative?","answer":"The closest functional sibling is BM05B-XASS-TF(LF)(SN), which is identical except for 5 positions instead of 4. Both share the same 2.50mm pitch, tin plating, 3 A rating, and SMD mounting. The 3-position BM03B-XASS-TF(LF)(SN) is also a direct drop-in for lower circuit counts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/jst/BM04B-XASS-TFLFSN","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/BM04B-XASS-TFLFSN 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}}