Overview
The Square D EHB14020 is a single-pole, 20-amp molded case circuit breaker designed for commercial and industrial electrical distribution. This thermal-magnetic breaker delivers reliable overcurrent protection with 14kA interrupting capacity at 277VAC and features a bolt-on connection for compatibility with legacy Square D NEHB panelboards. The Visi-Trip indicator provides visual confirmation of trip status, making fault diagnosis straightforward.
Key Features
- 1-pole, 20-amp thermal-magnetic protection
- 14kA AIC rating at 277V (65kA at 120V)
- Bolt-on mounting design for NEHB panelboard compatibility
- Visi-Trip status indicator for easy fault identification
- HACR and SWD rated for commercial/industrial applications
- 120/240/277VAC rated at 50/60 Hz
Technical Specifications
- Amperage: 20A
- Voltage Rating: 120/240/277VAC @ 50/60 Hz
- Poles: 1
- AIC Rating: 65kA @ 120VAC; 14kA @ 240/277VAC
- Trip Type: Thermal-Magnetic
- Frame Type: EHB Molded Case
- Connection: Bolt-On
- Wire Size: 14 AWG to 1 AWG copper or aluminum
- Operating Temperature: 40°C rated ambient
- Certifications: UL 489, CSA, HACR, SWD rated
Typical Applications
The EHB14020 is engineered for legacy electrical infrastructure where NEHB panelboards remain in service. Common applications include:
- Commercial building distribution panels and sub-panels
- Industrial control circuits requiring 20A protection
- Equipment branch circuits in factories and facilities
- Replacement breakers for aging systems before full panelboard upgrade
- Maintenance and retrofit work on existing NEHB-equipped facilities
Compatibility & Replacements
Compatible With
- Square D NEHB legacy commercial panelboards (bolt-on mounting)
- 120V, 240V, and 277V single-phase distribution systems
- Standard electrical enclosures rated for molded case breakers
- Thermal-magnetic trip protection applications
Replaces / Drop-In Replacement For
- Other Square D EHB-series 20A breakers in NEHB panelboards
- Legacy single-pole 20A breakers with 277V compatibility
- Note: This breaker is designed for NEHB infrastructure; upgrading to NF panelboards requires EDB-series breakers
Works With
- Square D NEHB panelboard systems (primary compatibility)
- Manual and automatic transfer switches compatible with NEHB infrastructure
- Standard electrical monitoring and control systems for commercial facilities
- Thermal-magnetic protection strategies in industrial settings
