HCB50S – 50 A Surface-Mount Circuit Breaker
● Rating & Classification
- Current rating: 50 A DC, up to 48 Vdc operation
- Interrupt rating: ~3,000 A at 30 Vdc (HCB50S)
● Construction & Mounting
- Design: Surface-mount with screw mounting holes on faceplate; ideal for bulkhead or panel installation without rear access
- Material & Protection: UL 94 V‑0 thermoset plastic housing, IP67 rated for dust and water resistance
● Trip & Reset Functionality
- Includes a visible manual reset lever (red button) that trips under overload or can be manually switched off; resets by pushing the button back up
- Trip‑free design: Cannot be held “ON” when an overcurrent occurs, ensuring safety
● Environmental Specs
- Operating temperature: −32 °C to 82 °C
- Storage temperature: −34 °C up to 149 °C
● Standards & Compliance
- Meets SAE J1625 and SAE J1171 ignition-protection standards for automotive and marine use
● Electrical Connections
- Dual ¼″ stud terminals for line and load connections; ring terminals included or required depending on supplier
Summary Table
| Feature | Specification |
|---|
| Rating | 50 A @ up to 48 V DC |
| Interrupt Capacity | ~3,000 A @ 30 V DC |
| Reset Type | Manual reset, trip-free lever |
| Protection Rating | IP67, UL 94 V‑0 thermoset plastic |
| Temp Range | −32 °C to +82 °C (operating) |
| Compliance | SAE J1625, SAE J1171 |
| Mounting Style | Surface mount, screw-down |
💡 Typical Applications
- Main protection on boats or marine setups (e.g. house battery feeds, windlasses, stereo amps)
- Automotive or RV DC systems requiring reliable, waterproof circuit protection
- RV systems, trucks, buses or industrial equipment operating up to 48 V DC
