The Westinghouse EHB3040 is a 3-pole, 40-amp, 480VAC molded case circuit breaker rated for 40°C ambient operation. Manufactured in December 1977, this heavy-duty industrial breaker features CU/AL rated terminals and is UL Listed for 3-pole circuit breaker applications. It is suitable for use in compatible Westinghouse and successor (Cutler-Hammer/Eaton) panelboards and distribution equipment.
| Feature | Specification |
|---|---|
| Brand | Westinghouse |
| Model Number | EHB3040 |
| Style Number | 4989D52G39 |
| Product Type | Molded Case Circuit Breaker |
| Amperage | 40A |
| Number of Poles | 3 |
| Voltage Rating | 480 VAC |
| Ambient Temperature Rating | 40°C |
| Interrupting Rating (240V) | 18,000 Amps RMS Symmetrical |
| Interrupting Rating (480V) | 14,000 Amps RMS Symmetrical |
| Terminal Type | CU/AL (Copper/Aluminum compatible) |
| Certification | UL Listed |
| Date Code | 12/77 |
| Color | Black |
Compatible with Westinghouse EHB-series panelboards and distribution equipment. Also cross-compatible with Cutler-Hammer and Eaton equipment that accepts EHB-frame breakers. Consult your panelboard documentation to verify fitment before installation.