MASTER LOCK 491B Clamp-On Circuit Breaker Lockout, For 120/277V AC, Wide Toggle
The MASTER LOCK Single Pole Breaker Lockout (MPN 491B) is a clamp-on circuit breaker lockout designed for 120/277V AC voltage and wide breaker toggles. It does not include a cable tie slot.
SKU 3G-OTH-556460
Also listed as: 491 B · 491-B
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
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Product Description
The MASTER LOCK Single Pole Breaker Lockout (MPN 491B) is a clamp-on circuit breaker lockout designed for 120/277V AC voltage and wide breaker toggles. It does not include a cable tie slot.
Frequently Asked Questions
What is the MASTER LOCK 491B Single Pole Breaker Lockout used for?
The MASTER LOCK 491B is a clamp-on circuit breaker lockout used to secure wide breaker toggles on 120/277V AC systems during lockout/tagout procedures. It helps prevent accidental re-energization, supporting workplace safety in industrial and commercial electrical maintenance.
What are the specifications of the MASTER LOCK 491B breaker lockout?
The MASTER LOCK 491B is rated for 120/277V AC voltage and is designed for use with wide breaker toggles. It is a single-pole, clamp-on lockout device. The manufacturer part number is 491B, and it does not include a cable tie slot.
Where to buy the MASTER LOCK 491B breaker lockout worldwide?
3G Electric supplies the MASTER LOCK 491B breaker lockout to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this safety device.
How to install the MASTER LOCK 491B clamp-on breaker lockout?
To install the MASTER LOCK 491B, clamp the device over the wide breaker toggle until it snaps into place. Then insert a padlock through the lockout hasp to secure it. Follow your facility's lockout/tagout procedures and verify zero energy before servicing equipment.
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3G Electric supplies MASTER LOCK clamp-on circuit breaker lockouts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.