Abb THHQB32050 Miniature Circuit Breaker 50A 22ka

Product Description

The ABB THHQB32050 is a 3-pole miniature circuit breaker (MCB) rated for 50 amps and 22 kA interrupting capacity. It provides overcurrent and short-circuit protection in commercial and residential electrical distribution systems. The THHQB series is a bolt-on style breaker designed for use in compatible ABB and GE-style loadcenters and panelboards. Licensed electricians install this breaker during new construction, panel upgrades, and branch circuit protection work. At 50 amps, it is commonly applied to HVAC equipment circuits, sub-panel feeds, and other high-draw branch circuits requiring reliable fault interruption.

The THHQB32050 is suited for 3-phase distribution panels in light commercial and industrial applications where a 50-amp, 3-pole bolt-on breaker is required. Its 22 kA interrupting rating makes it appropriate for services with higher available fault current, including commercial buildings and larger residential services fed from nearby utility transformers.

Key Features

• 50-amp continuous current rating for high-draw branch circuit protection
• 22 kA interrupting capacity for reliable fault clearing under high fault-current conditions
• 3-pole configuration provides simultaneous disconnect of all three phases
• Bolt-on mounting style for secure installation in compatible panelboards
• Compact MCB form factor suitable for space-constrained enclosures

Compatibility

Designed as an OEM-style replacement bolt-on miniature circuit breaker for compatible 3-phase loadcenters and panelboards accepting the THHQB breaker series.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the panel and verify absence of voltage with a calibrated meter before handling any breaker or bus connections. Confirm the panelboard is rated to accept THHQB bolt-on breakers before installation. Do not exceed the breaker's rated ampacity or interrupting capacity for the intended circuit application.

Technical Specifications

• Current Rating: 50 amps
• Interrupting Capacity: 22 kA
• Number of Poles: 3
• Mounting Style: Bolt-on
• Weight: 4 pounds
• UPC: 78316411862

Standard Information

• Brand: ABB
• Manufacturer Part Number: THHQB32050