SQUARE D 9421LB7 Door Mount Operating Mechanism, 125 A, 3 Poles
The SQUARE D Door Mount Operating Mechanism (MPN 9421LB7) is a circuit breaker handle and operator accessory designed for use with NEMA 1, 3, 3R, 4, 4X, and 12 enclosures containing PowerPact(R) B Circuit Breakers…
SKU 3G-OTH-19343
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The SQUARE D Door Mount Operating Mechanism (MPN 9421LB7) is a circuit breaker handle and operator accessory designed for use with NEMA 1, 3, 3R, 4, 4X, and 12 enclosures containing PowerPact(R) B Circuit Breakers. This 3-pole, 125 A accessory provides a door-mounted operating mechanism for Square D circuit breakers.
Frequently Asked Questions
What is the Square D 9421LB7 door mount operating mechanism used for?
The Square D 9421LB7 is a door-mounted operating mechanism for PowerPact B circuit breakers. It allows external on/off control of a 3-pole, 125 A breaker housed in NEMA 1, 3, 3R, 4, 4X, or 12 enclosures, enabling safe operation without opening the enclosure door.
What are the specifications of the Square D 9421LB7?
The Square D 9421LB7 is a door mount operating mechanism rated for 125 A and 3 poles. It is designed for use with PowerPact B circuit breakers in NEMA 1, 3, 3R, 4, 4X, and 12 enclosures. The accessory type is a door mount operating mechanism, manufactured by Square D.
Where to buy the Square D 9421LB7 worldwide?
3G Electric supplies the Square D 9421LB7 door mount operating mechanism worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this Square D accessory globally.
How to install the Square D 9421LB7 door mount operating mechanism?
Install the Square D 9421LB7 by mounting it on the enclosure door per the manufacturer's instructions. Align the mechanism with the PowerPact B breaker handle, secure with provided hardware, and verify smooth operation. Always disconnect power before installation and follow local electrical codes.
Used in
Common applications for SQUARE DSQUARE D Products
3G Electric supplies SQUARE D square d circuit breaker handles & operators. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.