Thomas & Betts | TB120 | Circuit Breaker | 20A | 1-Pole | 240V | Plug-In

Thomas & Betts TB120 Circuit Breaker is a 20-amp, 1-pole, 240V plug-in unit designed for quick replacement and reliable protection in compatible electrical panels.

Built for maintenance, retrofit, and replacement projects where exact specifications matter, the TB120 model delivers a straightforward plug-in installation and dependable overcurrent protection for a single 240V circuit.

Key specifications

• Amperage: 20 A
• Poles: 1-Pole
• Voltage: 240 V
• Installation: Plug-In

Why this TB120 stands out

This breaker is purpose-built for compatibility with panels that accept TB120 plug-in breakers. The plug-in design enables fast, tool-free swaps when a circuit trips or a panel needs a refresh, minimizing downtime. Its 1-pole, 240V configuration is tailored for dedicated 240V branches in appropriate electrical systems, providing targeted protection without unnecessary complexity.

Who it’s ideal for

Electricians conducting panel maintenance, retrofit installers upgrading older switchgear, and facilities managers needing dependable protection for 240V circuits will find the TB120 to be a precise, reliable choice. Keep a TB120 on hand as a ready-to-install replacement part for compatible systems.

Important compatibility note

To ensure proper fit and protection ratings, confirm fit and ratings before ordering. Use the TB120 part number as the primary reference to verify compatibility with your panel and existing wiring setup.

Practical tips

• Cross-check the panel’s listing and the breaker’s amperage to prevent mismatches.
• Verify the panel accepts plug-in TB120 breakers for a clean, secure installation.
• Store spare TB120 breakers in a dry, accessible location for efficient service calls and maintenance.