Overview
The Westinghouse HJD3250F is a molded case industrial circuit breaker designed for low-voltage power distribution systems. This Series C breaker is rated for 250 amperes at 600V AC (250V DC), making it suitable for commercial and industrial switchgear applications requiring high interrupting capacity and reliable thermal-magnetic protection.
Key Features
- 250A continuous current rating with 600V AC / 250V DC nominal voltage
- High interrupting capacity: 100kA @ 240V AC, 65kA @ 480V AC, 25kA @ 600V AC, 22kA @ 250V DC
- HACR-type thermal-magnetic trip unit for reliable overcurrent and short-circuit protection
- Bolt-on mounting for simple integration into standard breaker frames
- Frame-only design (HJD3250F) compatible with interchangeable JT-series trip units
- Compact molded case construction for space-efficient panel layouts
Technical Specifications
- Frame Type: HJD (Series C)
- Voltage Rating: 480/600V AC, 250V DC
- Current Rating: 250A
- Poles: 3
- Trip Type: Thermal-Magnetic
- Interrupting Rating @ 480V: 65,000 A
- Interrupting Rating @ 600V: 25,000 A
- Mounting: Bolt-On
- Weight: Approximately 8.7 lbs
- Dimensions: 4″ W × 4″ D × 10″ H (add 1″ to depth for handle)
- Operating Temperature: 40°C ambient
- Certification: HACR certified
Typical Applications
The Westinghouse HJD3250F circuit breaker is ideal for:
- Industrial power distribution panels and switchgear assemblies
- Commercial building electrical systems (multi-tenant facilities, manufacturing)
- Motor control centers and heavy-load circuit protection
- Utility and on-site generation backup systems
- Systems requiring HACR-rated protection in 480V or 600V environments
Compatibility & Replacements
Compatible With
- Eaton / Cutler-Hammer Series C breaker frames and enclosures
- Standard molded case breaker panels rated for 250A at 600V
- Interchangeable with other HJD-frame 250A units in Series C family
- Thermal-magnetic trip units rated for the HJD frame series
Replaces / Drop-In Replacement For
- Westinghouse HJD3250 (complete breaker version)
- Older JD3250F frame configurations (verify specific trip compatibility)
- Other Cutler-Hammer / Eaton Series C 250A frame-only units with matching mounting
Works With
- JT-series interchangeable thermal-magnetic trip units (JT3100T, JT3150T, JT3175T, etc.)
- Standard bolt-on mounting rails and breaker enclosures
- NEMA / IEC-compliant molded case distribution systems
- Legacy Westinghouse and Eaton electrical infrastructure
