Square D 9421LH3 Door Mount Handle for PowerPact

9421LH3 is a 3-inch door-mounted rotary handle assembly from Square D by Schneider Electric for PowerPacT B/H/J frame circuit breakers, rated for 125 A to 250 A and compatible with NEMA 1, 3R, and 12 enclosure configurations. The door-mounted design provides a dedicated operator point on the enclosure door to actuate the breaker, enabling control without direct contact with the live device during installation, testing, or maintenance. The handle is finished in black with a silver base ring, matching Square D's standard finish for PowerPact door-handling accessories. This part is part of Square D's 9421 family of door-mounted operating mechanisms and is the 3-inch variant intended for use with PowerPacT B, H, and J frame breakers; longer handles such as 9421LH6 are available for other frame sizes. The device is designed to integrate with the associated shaft and mounting hardware used in door-mounted configurations, ensuring proper alignment with enclosure doors and reliable operation in commercial electrical distributions.