Thomas Betts TB330 Circuit Breaker 30A 240V 3 Pole

Product Description

The THOMAS BETTS TB330 is a three-pole plug-in circuit breaker rated at 30 amps and 240 volts, designed for overcurrent protection in commercial and industrial power distribution panels. Built to the TB Series specification, it carries a 10 kA interrupting rating at 240 volts and is rated for operation up to 40 degrees C ambient. The TB330 uses a non-interchangeable trip unit with LI trip functions, meaning Long-Time and Instantaneous protection are both integrated. This breaker is installed by licensed electricians working on branch circuit and feeder protection applications.

The TB330 is suited for three-phase commercial electrical distribution systems where a compact plug-in breaker is required. Its three-pole configuration handles 240-volt three-phase loads commonly found in light commercial and industrial settings. The plug-in design allows straightforward installation into compatible TB Series panelboards without additional hardware. Electricians servicing existing TB Series equipment will find this breaker a direct-fit replacement for maintaining panel integrity.

Key Features

• 30-amp continuous current rating for branch circuit protection
• 240-volt, three-pole configuration handles three-phase loads
• 10 kA interrupting capacity at 240 volts
• LI trip function provides both Long-Time and Instantaneous overcurrent protection
• Non-interchangeable trip unit prevents field modification of trip settings
• Plug-in mounting for tool-free panel installation
• Rated to 40 degrees C ambient operating temperature

Compatibility

Designed as an OEM-style plug-in replacement for TB Series panelboards requiring a three-pole, 30-amp, 240-volt breaker with LI trip characteristics.

Installation Notes

Installation must be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize and lock out the panelboard before inserting or removing the breaker. Verify the panel bus is rated for the TB Series plug-in style before installation. Confirm load current and interrupting rating requirements are met prior to placing the breaker in service.