Overview
The Square D EHB14020 is a 1-pole, 20-amp molded case circuit breaker designed for legacy electrical distribution systems. Operating at 277V with a standard interrupting capacity of 14kA@277V AIC, this bolt-on breaker delivers reliable overcurrent protection in commercial and industrial facilities. The thermal-magnetic trip mechanism ensures fast response to both temporary overloads and short-circuit faults, while the visible Visi-Trip indicator allows technicians to quickly identify tripped circuits without opening the panel door.
Key Features
- 1-pole configuration with 20-amp trip rating
- Bolt-on mounting for secure panel integration
- Thermal-magnetic tripping mechanism
- Visi-Trip indicator for easy circuit status verification
- 277V, 120/277V rated for single-phase applications
- HACR and SWD rated for HVAC and motor circuits
- Standard 14kA interrupting capacity at 277V
Technical Specifications
- Amperage: 20A
- Voltage Rating: 277V, 120/277V
- Poles: 1-pole, 1-phase
- Mounting Style: Bolt-On
- Trip Type: Thermal-Magnetic
- Interrupting Capacity (AIC): 14kA @ 277V
- Series: EH-Frame (15–100A)
- Breaker Type: Molded Case Circuit Breaker (MCCB)
- Certifications: UL 489, HACR rated, SWD rated
Typical Applications
The EHB14020 is ideal for retrofitting legacy Square D NEHB panelboards in commercial buildings, industrial facilities, and institutional settings. Common applications include branch circuit protection in lighting systems, motor control circuits rated for HVAC equipment, and general-purpose feeders in older electrical systems. Engineers and maintenance technicians often specify this breaker when system upgrades require in-kind replacement without panelboard redesign.
Compatibility & Replacements
Compatible With
- Square D NEHB panelboards (legacy commercial distribution)
- Electrical systems rated for 120/277V, single-phase
- Motor control circuits (HACR rated)
- HVAC equipment protection (SWD rated)
Replaces / Drop-In Replacement For
The EHB14020 is a direct replacement for discontinued Square D EHB 1-pole 20A breakers in NEHB panelboards. Verify circuit requirements and voltage ratings before ordering. If upgrading the entire panelboard, consult your system integrator regarding modern alternatives such as Square D NF panelboards with EDB series breakers.
Works With
- Standard panelboard bus and bolt-on mounting systems
- Thermal-magnetic trip unit compatible devices
- Optional shunt trips and auxiliary contacts (add-ons available separately)
- Legacy electrical distribution networks rated 277V and below
