OVERVIEW

Official designation: Fuji SA53C (SA Series, Molded Case Circuit Breaker)

Role/Application: A three-pole MCCB engineered for thermal magnetic overcurrent and short-circuit protection, commonly used for reliable protection of 15 A branch circuits in industrial electrical distribution systems.

KEY SPECS SUMMARY

Power: 690 V AC / 250 V DC

Interfaces / Ports: Screw type line terminals

Indicators: Mechanical trip position flag

Operating Temp: Minus 20 to plus 60 degrees C

Platform / Compatibility: Fixed front panel mounting

Limit: Interrupting capacity 10 kA (Icu) at 230 V AC

Lifecycle: Discontinued (Replacement: BW50SAG-3P015)

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the primary short-circuit breaking capacity ratings (Icu) for the SA53C at 440 V AC?

A: The ultimate short-circuit breaking capacity (Icu) for the standard model is 7.5 kA at 440 V AC.

Wiring & Installation:

Q: What common connection components are available for the SA53C breaker terminals?

A: Connection options include screw terminals, flat terminals, or lug type terminals.

Troubleshooting & Compatibility:

Q: Which field-installable internal accessories are available for the SA53C MCCB?

A: Internal accessories include auxiliary switches, alarm switches, and shunt trip devices.

Replacement & Upgrades:

Q: What is the recommended modern product line replacement for the discontinued SA53C/15A unit?

A: The replacement is the Fuji Electric BW50SAG-3P series, specifically the BW50SAG-3P015 model.