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The ABB THED136020 is a molded case circuit breaker rated for 3-pole operation at 600 volts AC and 20 amps. It provides overcurrent and short-circuit protection in commercial and industrial electrical distribution systems. The 3-pole configuration makes it suitable for three-phase applications where branch circuit or feeder protection is required. Licensed electricians and electrical contractors are the primary installers of this device. Its compact molded case design fits standard panelboard and switchboard enclosures designed for this frame class.
This circuit breaker is used in commercial buildings, light industrial facilities, and large mechanical systems requiring three-phase branch circuit protection at 600 volts AC. It is appropriate for installations where NEC-compliant overcurrent protection is required on three-phase feeders or equipment circuits rated up to 20 amps. Typical applications include motor branch circuits, panel feeders, and equipment disconnects in 600-volt-class distribution systems.
Designed as an OEM-style replacement or new-installation molded case circuit breaker for three-phase 600-volt-class panelboards and switchboards accepting the THED frame series.
Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the panel or switchboard completely before installing or replacing this breaker. Verify that bus bar connections are torqued to the enclosure manufacturer's specifications using appropriate insulated tools. Do not install this breaker in a panel rated below its voltage class.
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