Overview
The Eaton SPCL1C05 supplementary protector is a single-pole, 5-ampere circuit protection device rated at 277V AC. Part of the Cutler-Hammer series, this supplementary protector features a C-curve trip characteristic designed for circuits with moderate inrush currents. The unit is intended for use in industrial control applications, branch circuit protection, and auxiliary device protection where selective coordination with upstream protection is required.
Key Features
- 1-pole, 5A rated current with C-curve (moderate inrush tolerance)
- 277V AC rated voltage for single-phase applications
- DIN-rail mount compatible for panel integration
- Thermal-magnetic trip mechanism for reliable protection
- UL 489 listed for safety compliance in industrial environments
- Compact form factor suitable for tight control panel spaces
Technical Specifications
The SPCL1C05 is engineered to provide precise overcurrent protection with minimal nuisance tripping in circuits subject to normal motor starting inrush currents or transformer energization transients.
- Rated Current: 5 amperes
- Poles: Single-pole (1P)
- Voltage Rating: 277V AC, single-phase
- Trip Characteristic: C-curve (IEC 60898 / UL 489)
- Mounting: DIN-rail
- Mechanism: Thermal-magnetic
Typical Applications
Supplementary protectors like the SPCL1C05 are typically used in:
- Industrial control panel branch circuits
- Lighting and receptacle circuits in commercial buildings
- Motor starter auxiliary circuits
- PLC input/output module protection
- Equipment control circuits requiring selective coordination
- HVAC and automation system protection
Compatibility & Replacements
Compatible With
- Eaton Cutler-Hammer DIN-rail systems and control enclosures
- Standard industrial control panels rated for 277V single-phase
- Load centers and breaker boxes accepting C-curve supplementary protectors
- Systems requiring UL 489 listed overcurrent protection devices
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The SPCL1C05 replaces earlier Eaton Cutler-Hammer supplementary protectors of equivalent amperage and voltage rating in legacy control systems.
Works With
- Industrial automation control systems requiring 277V protection
- Standard DIN-rail mounted control devices
- UL 508 rated control enclosures
- NEMA-compliant industrial control panels
