Abb THQB21WY20 Bolt-on Circuit Breaker 2P 20A

Product Description

The ABB THQB21WY20 is a 2-pole, 20-amp bolt-on thermal-magnetic circuit breaker from the Q Line series, designed for use in load centers and lighting panels. It features a switched neutral configuration, making it suitable for applications requiring neutral switching in addition to hot-leg interruption. At one inch wide per pole, the compact form factor fits standard bolt-on bus configurations in both residential and commercial electrical panels. The quick-make and quick-break mechanism provides consistent, reliable operation, while the built-in trip indication allows technicians to identify a tripped breaker at a glance.

This breaker is used in residential load centers and commercial lighting panels where bolt-on breaker mounting is required. The switched neutral design is appropriate for specific branch circuit applications such as multi-wire branch circuits or installations governed by local code requiring neutral switching. It can also be ordered with auxiliary contact and shunt trip accessories for control or monitoring integration, and is available in configurations for HID lighting applications.

Key Features

• Bolt-on design for secure bus connection in load centers and lighting panels
• Switched neutral configuration provides simultaneous neutral and hot-leg switching
• Thermal-magnetic trip mechanism protects against overload and short-circuit conditions
• Quick-make and quick-break action ensures reliable, consistent switching performance
• Easy-to-spot trip indication for fast visual fault identification
• Compatible with auxiliary contact and shunt trip accessories for expanded functionality

Compatibility

Designed as an OEM-style bolt-on replacement for 2-pole Q Line breaker positions in residential and commercial load centers and lighting panels that accept bolt-on breaker configurations.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize the panel and verify the absence of voltage before handling or installing the breaker. Ensure the bolt-on bus connections are properly seated and torqued to the panel manufacturer specifications. Switched neutral breakers must be wired to interrupt both the hot and neutral conductors simultaneously as required by the application.

Technical Specifications

• Poles: 2
• Amperage: 20 amps
• Type: Thermal-Magnetic
• Mounting: Bolt-On
• Neutral Configuration: Switched Neutral
• Width Per Pole: 1 inch
• UPC: 783164103557

Standard Information

• Brand: ABB
• Manufacturer Part Number: THQB21WY20