OVERVIEW

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

Role/Application: A three-pole MCCB providing dependable thermal magnetic overcurrent and short-circuit protection for general industrial branch circuits with a 40 A rated current.

KEY SPECS SUMMARY

Power: 690 V AC / 250 V DC rated voltage

Interfaces / Ports: Screw terminals for conductor connection

Indicators: Mechanical trip flag for status indication

Operating Temp: Minus 20 to plus 60 degrees C ambient temperature

Platform / Compatibility: Fixed panel mounting

Limit: Interrupting capacity up to 25 kA (at 230 V AC)

Lifecycle: Discontinued (Replacement: BW50SAG-3P040 or BW50SAG-3P050)

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the primary short-circuit breaking capacity (Icu) of the SA53C at 230 V AC?

A: The ultimate short-circuit breaking capacity (Icu) is 25 kA at 230 V AC.

Wiring & Installation:

Q: What are the primary connection requirements for the SA53C molded case circuit breaker?

A: Connection uses screw type terminals, and it is designed for fixed panel mounting.

Troubleshooting & Compatibility:

Q: Can the SA53C accommodate optional accessories for remote signaling or tripping?

A: Yes, it is compatible with field-installable accessories such as auxiliary and alarm switches.

Replacement & Upgrades:

Q: What is the modern direct replacement series for the discontinued Fuji SA53C model?

A: The recommended current replacement is generally the Fuji Electric BW50SAG-3P series.