{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"B04B-XASK-1","brand":"JST","brandSlug":"jst","productSlug":"B04B-XASK-1","canonicalUrl":"https://icsourcedirect.com/jst/B04B-XASK-1","factsUrl":"https://icsourcedirect.com/api/mcp/products/B04B-XASK-1","rawCanonicalId":null},"summary":{"shortDescription":"JST Sales America Inc., XA series, Board to Cable/Wire, Header, 4 Positions, 2.50mm Pitch, Shrouded - 4 Wall, Locking Ramp, Through Hole, Press-Fit/Solder, 3 A, 250 V, UL94 V-0, Natural Insulation","salesMarkdown":"## 4-position 2.5mm pitch header with locking ramp The B04B-XASK-1: This is a JST XA series male header, 4 positions on 2.50mm pitch, shrouded on all four walls, with a locking ramp that clicks into the mating receptacle housing. Rated 3 A per contact at 250 V, it's a through-hole part that terminates with a press-fit solder tail — the press-fit holds the pin in the board during wave solder, so you don't need a separate board lock. ## What the locking ramp and 4-wall shroud do for the fit The locking ramp engages with the matching XA receptacle housing to keep the pair mated under vibration — no screws or latches to forget. The 4-wall shroud protects the male pins from being bent during handling and guides the receptacle into alignment on mate. Mated stack height is 11.3mm, measured from the board surface to the top of the mated receptacle. The insulation height of 0.346\" (8.80mm) leaves room for the receptacle to seat fully. ## Sourcing and lifecycle — active production, RoHS note Sourced per RFQ against your BOM quantity — no stock-holding claim, but we can quote against volume or sample needs. The 5-position B05B-XASK-1 shares the same 2.50mm pitch, locking ramp, shrouding, current rating, and mated height — the only difference is 5 circuits vs 4. If your BOM calls for 4 positions, this is the exact fit; the 5-position sibling won't mate with a 4-position receptacle without leaving an empty cavity.","metaTitle":"B04B-XASK-1 JST XA Header 4 Pos 2.5mm Pitch Locking Ramp","metaDescription":"JST XA series header, 4 circuits, 2.50mm pitch, shrouded 4-wall, locking ramp, 3 A, 250 V, through-hole press-fit. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":"XA","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Pin Headers, Sockets & Housings","Pin Headers"],"specifications":{"Mfr":"JST Sales America Inc.","Style":"Board to Cable/Wire","Series":"XA","Package":"Bulk","Features":"-","Shrouding":"Shrouded - 4 Wall","Termination":"Press-Fit, Solder","Applications":"-","Contact Type":"Male Pin","Contact Shape":"Circular","Mounting Type":"Through Hole","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":"0.346\\\" (8.80mm)","Ingress Protection":"-","Base Product Number":"B04B-XAS","Insulation Material":"Polyamide (PA66), Nylon 6/6, Glass Filled","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":"11.3mm","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":"$0.3200","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.32000","currency":"USD"},{"qty":10,"price":"$0.26900","currency":"USD"},{"qty":100,"price":"$0.20930","currency":"USD"},{"qty":500,"price":"$0.17938","currency":"USD"},{"qty":1000,"price":"$0.14948","currency":"USD"},{"qty":5000,"price":"$0.12812","currency":"USD"},{"qty":10000,"price":"$0.11958","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icsourcedirect.com/d7b9d054706f4cb7d9e943bf7a731c95.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the pin pitch of B04B-XASK-1?","answer":"The mating pitch is 0.098\" (2.50mm), single row, 4 positions loaded."},{"question":"Is B04B-XASK-1 RoHS compliant?","answer":"No, this specific order code is listed as RoHS non-compliant. For RoHS-compliant alternatives, use B04B-XASK-1(LF)(SN) or B04B-XASK-1N(LF)(SN) — same mechanical fit, tin-plated contacts, RoHS compliant."},{"question":"What mates with B04B-XASK-1?","answer":"It mates with any JST XA series receptacle housing designed for 4 circuits on 2.50mm pitch, such as the XARP-04V. The locking ramp on the header engages with the latch on the receptacle."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"isd-matrix-langgraph","citationUrl":"https://icsourcedirect.com/jst/B04B-XASK-1","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/B04B-XASK-1 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}}