We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
RFQ CartGet a QuoteSign inSign up
MASTER LOCK Circuit Breaker Lockout: Clamp-On - Clamp-On Circuit Breaker Lockouts
MASTER LOCKClamp-On Circuit Breaker Lockouts

MASTER LOCK Circuit Breaker Lockout: Clamp-On

The MASTER LOCK Clamp-On Circuit Breaker Lockout (MPN 493B) is designed for 120/240V AC voltage and fits standard single toggle switches. It does not include a cable tie slot. 3G Electric interprets your…

SKU 3G-OTH-556439

Brand
MASTER LOCK
Item
Circuit Breaker Lockout: Clamp-On
Category
Clamp-On Circuit Breaker Lockouts
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

MASTER LOCK
Manufacturer Part Number
493B
Type
For 120/240V AC Volt
For Voltage
120/240V AC
For Use With
Standard Single Toggles
Includes Cable Tie Slot Final
No
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

MASTER LOCK Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MASTER LOCK Clamp-On Circuit Breaker Lockout (MPN 493B) is designed for 120/240V AC voltage and fits standard single toggle switches. It does not include a cable tie slot. 3G Electric interprets your lockout/tagout needs, sources the right safety equipment, and supports your facility across 14 industrial departments.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the MASTER LOCK 493B circuit breaker lockout used for?

The MASTER LOCK 493B clamp-on lockout secures standard single toggle switches during lockout/tagout procedures on 120/240V AC circuits. It prevents accidental re-energization, supporting electrical safety in industrial facilities. 3G Electric sources this safety device and delivers it worldwide.

What are the specifications of the MASTER LOCK 493B?

The MASTER LOCK 493B is a clamp-on circuit breaker lockout rated for 120/240V AC voltage. It is designed for use with standard single toggle switches and does not include a cable tie slot. The manufacturer part number is 493B. 3G Electric supplies this MASTER LOCK safety device globally.

Where to buy the MASTER LOCK 493B worldwide?

3G Electric supplies the MASTER LOCK 493B clamp-on circuit breaker lockout to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us to order this lockout/tagout device for 120/240V AC standard single toggle switches.

How to install the MASTER LOCK 493B lockout?

To install the MASTER LOCK 493B, clamp it onto the standard single toggle switch handle until it snaps into place. Ensure the circuit is de-energized before applying the lockout. Attach a padlock through the lockout body to secure it. 3G Electric provides this safety device for worldwide delivery.

Used in

Common applications for MASTER LOCK
Locker security in industrial facilities — Master Lock built-in deadbolt lock (MPN 1710) for employee lockers
Equipment access control on job sites — Master Lock Bluetooth padlock (MPN 4400ECWWG) for tool cribs and gates
Key management for fleet vehicles — Master Lock lockbox (MPN 5440ECWWG) securing vehicle keys at depots
Padlock for outdoor storage units — Master Lock long shackle combination padlock (MPN 175LH) for hasps on sheds
Keyless entry for maintenance panels — Master Lock scrolling combination padlock (MPN 975DCOM) on electrical enclosures
High-security locking for warehouse cages — Master Lock stainless steel combination padlock (MPN 1500LF) for corrosion resistance

MASTER LOCK Products

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from MASTER LOCK

View all MASTER LOCK parts →
MASTER LOCK Circuit Breaker Lockout: Clamp-On, For 480/600V AC Volt (MPN S3822). Key specifications — For Voltage: 480/600V AC; For Use With: Molded Case Circuit Breakers; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK
MASTER LOCK Circuit Breaker Lockout: Clamp-On, For 480/600V AC Volt (MPN S3822). Key specifications — For Voltage: 480/600V AC; For Use With: Molded Case Circuit Breakers; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK Circuit Breaker Lockout Combo Pack: Clamp-On, For 120/277V AC Volt (MPN 506). Key specifications — For Voltage: 120/277V AC; For Use With: 491b Fits Wide or Tall Breaker Toggles; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK
MASTER LOCK Circuit Breaker Lockout Combo Pack: Clamp-On, For 120/277V AC Volt (MPN 506). Key specifications — For Voltage: 120/277V AC; For Use With: 491b Fits Wide or Tall Breaker Toggles; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK ISO-DIN Universal Lockout Device: Clamp-On, For 120/277V AC Volt (MPN S2393). Key specifications — For Voltage: 120/277V AC; For Use With: Breaker Toggles; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK
MASTER LOCK ISO-DIN Universal Lockout Device: Clamp-On, For 120/277V AC Volt (MPN S2393). Key specifications — For Voltage: 120/277V AC; For Use With: Breaker Toggles; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK Single Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt (MPN 491B). Key specifications — For Voltage: 120/277V AC; For Use With: Wide Breaker Toggles; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK
MASTER LOCK Single Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt (MPN 491B). Key specifications — For Voltage: 120/277V AC; For Use With: Wide Breaker Toggles; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK Circuit Breaker Lockout: Clamp-On, For 480/600V AC Volt, S3823. Key specifications — For Voltage: 480/600V AC; For Circuit Breaker Type: Oversized; For Use With: Oversized Handle Circuit Breakers; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK
MASTER LOCK Circuit Breaker Lockout: Clamp-On, For 480/600V AC Volt, S3823. Key specifications — For Voltage: 480/600V AC; For Circuit Breaker Type: Oversized; For Use With: Oversized Handle Circuit Breakers; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK ISO-DIN Universal Lockout Device: Clamp-On, For 120/277V AC Volt, S2394. Key specifications — For Voltage: 120/277V AC; For Use With: All Master Lock and American Lock Safety Padlocks and Lockout Hasps; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK
MASTER LOCK ISO-DIN Universal Lockout Device: Clamp-On, For 120/277V AC Volt, S2394. Key specifications — For Voltage: 120/277V AC; For Use With: All Master Lock and American Lock Safety Padlocks and Lockout Hasps; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK Circuit Breaker Lockout: Clamp-On, For 120/240V AC Volt, S3821. Key specifications — For Voltage: 120/240V AC; For Use With: Miniature Circuit Breakers; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.
MASTER LOCK
MASTER LOCK Circuit Breaker Lockout: Clamp-On, For 120/240V AC Volt, S3821. Key specifications — For Voltage: 120/240V AC; For Use With: Miniature Circuit Breakers; Brand: MASTER LOCK; Includes Cable Tie Slot_Final: No.