Overview
The Allen-Bradley 1492-SP3C300 is a miniature supplementary protector circuit breaker rated for 30 amperes at three poles with neutral. This single-module breaker is designed to provide reliable overcurrent protection in industrial control panel applications. The 1492-SP3C300 features a Series C trip curve, making it suitable for inductive loads common in motor control and automation systems. With UL/CSA certification, this device meets stringent industry safety standards for supplementary protection.
Key Features
- 30 Amp Rated Current: Three-pole with neutral for balanced load distribution and system flexibility
- Series C Trip Curve: Magnetic trip actuates at 5–10 times rated current, providing selective protection for motor and inductive loads
- Current-Limiting Design: Fast breaking action minimizes energy let-through during fault conditions
- Dual Terminals: Allow connection of two wires or combination of wire and bus bar for flexible panel assembly
- DIN Rail Mounting: Fast clip attachment enables quick installation and removal without tools
- Reversible Connections: Line and load terminals are reversible, simplifying retrofit installations
Technical Specifications
The 1492-SP3C300 is rated for a maximum of 480Y/277 volts AC (US designation) or 415 volts AC (IEC designation). The device has an interrupt rating of 10 kAIC and operates with a 40 °C (104 °F) calibration temperature for use in standard industrial environments. It conforms to UL 1077, CSA 22.2 No. 235, and IEC/EN 60947 standards. The toggle actuator provides positive open/close indication, and the device can accommodate up to six accessories for auxiliary contact functions or status indication.
Typical Applications
- Motor control circuits and soft-starter protection
- Programmable logic controller (PLC) input/output module protection
- Variable frequency drive (VFD) branch circuit protection
- Thermal imaging camera and sensor circuit protection
- Industrial control panel branch circuits with moderate to high inductive loads
- System retrofit where compact, current-limiting protection is required
Compatibility & Replacements
Compatible With
- DIN rail 35 mm top hat mounting systems
- Allen-Bradley standard auxiliary contact modules (bottom and side-mounted options)
- Standard industrial panel bus bar systems (compatible with dual terminal design)
- UL/CSA-listed industrial control panels and enclosures
- Schneider Electric and similar panel accessory ecosystems for auxiliary relay integration
Replaces / Drop-In Replacement For
The 1492-SP3C300 is a direct upgrade or replacement for earlier-generation Allen-Bradley supplementary protectors in the same frame size and current rating. This unit is distinct from the 1492-SPM3C300 (miniature variant). Verify compatibility with your original equipment manufacturer before substitution in critical applications.
Works With
- ABB S200 series accessories (through standardized DIN rail compatibility)
- Eaton/Moeller M22 and PKZM0 coordination (frame compatibility only)
- Standard 10 mm DIN rail systems and channel fittings
- Allen-Bradley ControlLogix and CompactLogix input/output protection applications
- Rockwell Automation Studio 5000 / RSLogix 5000 panel designs
