OVERVIEW

Official designation: Allen-Bradley 1492-SP1C020 (Bulletin 1492-SP, Supplementary Protector/Miniature Circuit Breaker)

Role/Application: Single-pole thermal-magnetic supplementary protector designed for overcurrent protection in equipment where branch circuit protection is already provided; features a C-Trip curve for general inductive loads.

KEY SPECS SUMMARY

Power: 277 V AC (UL), 240 V AC (IEC)

Interfaces / Ports: Screw terminals, 1 pole

Indicators: Indicator window (contact state)

Operating Temp: Reference temperature 30 degrees C

Platform / Compatibility: DIN Rail mountable

Limit: 2 A rated current, 10 kA interrupting capacity

Lifecycle: Discontinued by manufacturer

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the magnetic trip range for the C-Trip curve on this supplementary protector?

A: The C-Trip magnetic characteristic activates between 5 and 10 times the rated current (In).

Wiring & Installation:

Q: What is the range of copper wire sizes and the required torque for the terminals?

A: Terminals accept #16 to #4 AWG copper wire and require a tightening torque of 2.5 Newton-meters.

Troubleshooting & Compatibility:

Q: Can the 1492-SP1C020 be connected in reverse, with the load side wired to the line terminal?

A: Yes, the 1492-SP series supports reversible line and load connections for installation flexibility.

Replacement & Upgrades:

Q: Is there a recommended functional replacement for the discontinued 1492-SP1C020 model?

A: The manufacturer recommends the 1492-SPM1C020 model as a functional upgrade or replacement.