Overview
The Intermatic AG6503C3 is a three-phase surge protective device (SPD) designed for Type 1 and Type 2 applications. Rated at 347/600 VAC with 50/60 Hz frequency, 3-pole, 4-wire configuration, this arrester guard employs TPMOV® (Thermally Protected Metal Oxide Varistor) surge protection technology to eliminate hazardous failure modes associated with standard MOV designs. The unit features a Type 4X watertight, plastic enclosure for outdoor installations with UV-resistant polycarbonate housing.
Key Features
- Six modes of protection with green LED protection indicator
- Housing molded from weather and UV resistant polycarbonate which complies with UL Standard for strength and flame resistance
- All electrical connections embedded in UL recognized epoxy to seal and protect from moisture and corrosion
- 50 kA short circuit rating with 20 kA nominal discharge current
- Three poles with 18-inch leads (standard configuration)
- 1/2″ threaded nipple for 7/8″ nominal conduit knockout, includes 1-year product warranty
Technical Specifications
- Voltage Rating: 347/600 VAC
- Phase Configuration: Three-phase (3-pole, 4-wire)
- Frequency: 50/60 Hz
- Short Circuit Rating: 50 kA
- Nominal Discharge Current: 20 kA
- Modes of Protection: 6-mode (L-L, L-G, L-N)
- Enclosure Type: NEMA 1/2/4/4X, Type 4X watertight plastic
- Housing Material: UV-resistant polycarbonate
- Lead Configuration: 18 inches (AG6503C3), 36 inches available (AG6503L3)
- Operating Temperature Range: -13°F to 140°F (-10°C to 60°C)
- Certification: UL Listed to ANSI/UL 1449, 3rd edition
- Warranty: 1 year
Typical Applications
Outdoor applications include irrigation equipment, farm equipment, pumps, lighting fixtures, traffic signaling devices, HVACR controls and motors. Type 1 applications include outdoor installations before service entrances and utility meter cabinets. Type 2 applications include installations after service entrances.
Compatibility & Replacements
Compatible With
- Three-phase electrical systems rated 347/600 VAC
- Service entrance and distribution panels
- Utility meter cabinets and outdoor meter applications
- HVAC control systems and motor circuits
- Irrigation and agricultural equipment
- Outdoor lighting fixtures and traffic signaling devices
Replaces / Drop-In Replacement For
- Earlier Intermatic AG series three-phase surge protective devices
- Other ANSI/UL 1449-certified 347/600V three-phase SPDs with equivalent footprint and connection configuration
- Verify compatibility with your system integrator before ordering for exact cross-reference.
Works With
- Standard 347/600 VAC three-phase electrical distribution systems
- Type 1 and Type 2 surge protective device installations per NEC Article 285
- Hardwired surge protection applications (no plug-and-play connector)
- ANSI/IEEE C62.11 and C62.34 compliant lightning protection networks






