JST XH 2.54mm PCB Header B2B/B3B/B4B-XH-A — Through-Hole, Straight, 2–4 Pin

The JST XH 2.54mm (0.1") through-hole straight PCB header is the industry-standard wire-to-board connector for 3D printer mainboards, Arduino projects, stepper motor drivers, and a wide range of electronics applications. The B-XH-A series features a straight through-hole mounting style with a 9.8mm assembled board height, making it ideal for low-profile PCB designs where vertical space is limited.

This listing covers the B2B-XH-A (2-pin), B3B-XH-A (3-pin), and B4B-XH-A (4-pin) variants. All are rated 3A / 250V AC/DC with SXH-001T-P0.6 contacts and are directly compatible with JST XHR series female housings and SXH-001T-P0.6 pre-crimped wire assemblies.

Key Specifications

Series: JST XH | Part numbers: B2B-XH-A, B3B-XH-A, B4B-XH-A
Pitch: 2.54mm (0.1") | Pin counts: 2P, 3P, 4P
Mounting style: Through-hole, straight (vertical)
Assembled board height: 9.8mm
Rated current: 3A | Rated voltage: 250V AC/DC
Contact: SXH-001T-P0.6 | Wire range: 22–30 AWG
Housing material: PA nylon, UL94 V-0 | Contact material: Phosphor bronze, tin-plated
Operating temperature: -25°C to +85°C
Compliance: RoHS2

Why Choose JST XH 2.54mm Headers?

✅ Industry-standard 2.54mm pitch — the most widely used wire-to-board connector in 3D printers, Arduino, and maker electronics
✅ Positive-lock housing — locking latch prevents accidental disconnection under vibration
✅ 3A / 250V rating — suitable for both power and signal connections in a single connector family
✅ Through-hole mounting — mechanically robust, withstands repeated mating cycles and cable pull forces
✅ Low-profile 9.8mm board height — ideal for compact PCB designs with limited vertical clearance
✅ RoHS2 compliant — phosphor bronze contacts, PA nylon housing

Typical Applications

3D printer mainboard thermistor, fan, endstop, and stepper motor connections
Arduino and development board wire-to-board connections
Stepper motor driver signal and power wiring
LED strip and lighting control board connections
RC model and drone internal wiring
Industrial control and automation PCBs

Compatibility

These PCB headers are compatible with JST XHR series female housings (XHR-2, XHR-3, XHR-4) and SXH-001T-P0.6 pre-crimped wire assemblies. They are also compatible with third-party XH 2.54mm equivalent housings and pre-crimped cables from Keszoox and other manufacturers.