Overview
The Cutler-Hammer SPCL1C05 supplementary protector delivers overcurrent protection for low-amperage circuits in industrial and automation control systems. This 1-pole unit is rated 5A at 277V AC and features a 10 kA interrupt capacity. As a supplementary protector compliant with UL 1077, it provides protection where main branch circuit protection is supplied by a separate molded case breaker or fuse, making it ideal for feeder terminals, pilot devices, and small transformer circuits.
Key Features
- Current-limiting thermal magnetic design for rapid fault interruption and reduced let-through energy
- Single-pole configuration (1P) mounted on 35 mm DIN rail for compact panel installation
- Color-coded red/green status indicator (green = OFF, red = ON) for visual device confirmation
- 10 kA interrupt rating ensures reliable protection against short circuits
- UL 1077 listed supplementary protector for branch circuit applications
Technical Specifications
Key electrical and mechanical parameters for system integration:
| Current Rating | 5 Amperes |
| Voltage Rating | 277V AC |
| Poles | 1 (Single-Pole) |
| Interrupt Rating | 10 kA |
| Mounting | 35 mm DIN Rail |
| Trip Characteristic | Thermal Magnetic |
| Size/Width | 1 Module Width (17.5 mm) |
| Status Indicator | Red/Green Handle |
| Certifications | UL 1077, CSA Approved |
| Manufacturer | Eaton (Cutler-Hammer) |
Typical Applications
The SPCL1C05 is commonly used in:
- Control transformer secondary circuits (low-amperage protection)
- Pilot device circuits in industrial motor starters and soft starters
- Branch circuit protection in PLC cabinets and automation enclosures
- HVAC control systems and facility automation equipment
- Lighting and auxiliary circuits requiring supplementary protection
Compatibility & Replacements
Compatible With
- 35 mm DIN rail enclosures and standard industrial control panels
- Eaton/Cutler-Hammer enclosure systems and starter combinations
- Any system requiring UL 1077 supplementary overcurrent protection
- Control voltage circuits at 277V AC or lower
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The SPCL1C05 is a supplementary protector model from the Cutler-Hammer family; common related models include FAZ-C5/1-SP (standard current-limiting variant). Always confirm model interchangeability for your specific application.
Works With
- UL 489 and UL 1077 listed circuit protection systems
- Thermal-magnetic trip coordination with main molded case breakers
- DIN rail-mounted control system architectures
- Industrial automation and PLC cabinet designs
