OVERVIEW

Official designation: Allen-Bradley 1492-SPM1C030 (Bulletin 1492-SPM, Supplementary Protector)

Role/Application: Single-pole thermal-magnetic supplementary protector with a C-trip curve, rated 3A, offering overcurrent and short-circuit protection for control circuits and equipment with inductive loads.

KEY SPECS SUMMARY

Power: 277 V AC, 48 V DC

Interfaces / Ports: Dual terminals, screw termination

Indicators: Toggle position, Red ON/Green OFF window

Operating Temp: Minus 25 degrees C to 55 degrees C

Platform / Compatibility: DIN rail mounting, UL 1077, CSA 22.2

Limit: 3 A Rated Current, 10 kA Interrupt Rating

Lifecycle: Active, Refer to the latest manufacturer manual.

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the magnetic trip instantaneous range for this C curve 3A supplementary protector?

A: The C trip curve instantaneous magnetic trip range is five to ten times the 3 A rated current.

Wiring & Installation:

Q: What is the maximum rigid and flexible conductor size the dual terminals accept?

A: Terminals accept up to 35 mm squared rigid cable and 25 mm squared flexible cable.

Troubleshooting & Compatibility:

Q: What shock and vibration resistance features help prevent nuisance tripping in industrial settings?

A: The 1492-SPM series features superior shock and vibration resistance to maintain reliable operation.

Replacement & Upgrades:

Q: Can this single-pole supplementary protector be paired with field-mounted auxiliary accessories?

A: Yes, the unit accepts right-mounted accessories, including shunt trips and auxiliary contacts.