The ABB WB‑A (part number FPTNR) is a mechanical latching module that converts standard ABB A-series contactors into latching-type contactors. Compatible with AX through AX contactor frames, this unit maintains contactor engagement even after the control voltage is removed and provides a manual reset option via a reset button.

This accessory is ideal for applications where latching behavior is required for reliability or power-saving purposes.

Key Features:

Model / P/N: WB‑A (FPTNR)
Voltage Type:  V AC ( Hz), – V AC ( Hz), or  V DC
Tri-Voltage Rating Plate: Supports AC, AC  Hz, and DC versions
Compatible Contactors: ABB AX-series (A–A, AF–AF, AL–AL, etc.)
Mechanical Latch Function: Holds contactor closed even if coil voltage is removed; manual or electrical reset via plunger/button
Mounting: Clicks onto contactor body; screw terminals for coil and latch wiring
Dimensions & Weight:  mm ×  mm ×  mm; ~. kg
Standards & Compliance: CE, UL-recognized, RoHS; HS code

ABB – WB75-A (FPTN372726R1004) – Mechanical Latching Unit, 110 V AC/DC, AX06–AX8

ABB – WB75-A (FPTN372726R1004) – Mechanical Latching Unit, 110 V AC/DC, AX06–AX8