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B04B-XASK-1(LF)(SN) — JST product photo
JST

JST B04B-XASK-1(LF)(SN) Header – 4-Pos, 2.50mm Pitch, Active

MPNB04B-XASK-1(LF)(SN)
Active

JST XA series, Board to Cable/Wire, Header, Male Pin, 4 Positions, 0.098" (2.50mm) Pitch, Through Hole, Press-Fit, Solder, Tin Contacts, Locking Ramp, UL94 V-0, Natural, 3A, 250V, -25°C~85°C, 11.3mm Stack Height

$0.3000Ref. price · indicative, final on quote
StockContact for availability
Lead timeIn Stock wk
MOQ1 pcs
  • New & original stockTraceable channels only — no mixed lots, no re-taped reels.
  • Factory packaging where availableSealed reels, trays and bags; cut quantities always stated on the quote.
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Specifications

B04B-XASK-1(LF)(SN) Technical Specifications
ParameterValue
SeriesXA
GenderMale Pin
Mounting typeThrough Hole
Connector typeHeader
Fastening typeLocking Ramp
Voltage rating250V
Current rating3A
Operating temperature-25°C~85°C
Contact materialCopper Alloy
Insulation colorNatural
Insulation height0.346\" (8.80mm)
Insulation materialPolyamide (PA66), Nylon 6/6, Glass Filled
Mated stacking heights11.3mm
Material flammability ratingUL94 V-0
StyleBoard to Cable/Wire
PackageBulk
ShroudingShrouded - 4 Wall
TerminationPress-Fit, Solder
Contact shapeCircular
Rows1
Pitch0.098\" (2.50mm)
Positions4
Contact finish - postTin
Contact length - post0.134\" (3.40mm)
Contact finish - matingTin

Product details

Board Footprint and Pitch

The B04B-XASK-1(LF)(SN): This is the dimension that must match the mating receptacle housing — any mismatch and the connector pair won't engage.

This is the same locking mechanism used across the XA series — the mating half is the XA receptacle housing, which accepts the appropriate crimp terminal.

The 0.134" (3.40mm) post length is designed for standard PCB thicknesses up to 1.6mm.

The base product number is B04B-XAS, which is the same across all variants in this position count.

The 4-position B04B-XASK-1(LF)(SN) shares the same 2.50mm pitch, 3 A rating, and locking ramp as the 5-position B05B-XASK-1. Compared to the un-suffixed B04B-XASK-1, the (LF)(SN) suffix indicates RoHS compliance and tin-plated contacts. The base part B04B-XAS is identical in all other respects.

Frequently asked questions

What housing mates with JST B04B-XASK-1(LF)(SN)?

The mating half is the JST XA series receptacle housing. It accepts the corresponding crimp terminal (sold separately).

Is B04B-XASK-1(LF)(SN) RoHS compliant?

Yes, the (LF)(SN) suffix indicates RoHS compliance and tin-plated contacts.

What is the difference between B04B-XASK-1 and B04B-XASK-1(LF)(SN)?

The (LF)(SN) suffix on the part number indicates RoHS compliance and tin-plated contacts. The base part B04B-XASK-1 may not carry the same compliance marking. All other specifications are identical.

Where can I buy JST B04B-XASK-1(LF)(SN) and check stock?

This part is sourced per RFQ through independent distribution.