Miniature circuit breaker Schneider Electric A9F03325 — 25 A, 133 V, 10 kA, IP20, 54×78.5×91 mm

Schneider Electric A9F03325 is a miniature circuit breaker designed for overcurrent protection in compact DIN-rail electrical panels. Rated for 25 A and up to 133 V, it offers a breaking capacity of 10 kA and IP20 enclosure protection. Its compact dimensions (54 × 78.5 × 91 mm) allow installation where space is limited while maintaining reliable thermal-magnetic tripping characteristics for routine residential, commercial and light industrial circuits.

Advantages

The device combines a compact footprint with a high short-circuit breaking capacity, enabling protection of branch circuits without requiring large panel space. IP20 protection ensures basic safety against contact with live parts in typical indoor installations. The thermal-magnetic mechanism provides both fast response to short circuits and stable performance under overload conditions, reducing nuisance trips while delivering dependable circuit protection.

Suitable for

• Residential branch circuit protection (lighting, outlets)
• Commercial small power distribution and tenant units
• Light industrial control panels with limited space
• Retrofit projects where a compact DIN-rail breaker is needed

Key specifications

• Rated current: 25 A
• Rated voltage: 133 V
• Breaking capacity: 10,000 A (10 kA)
• Protection rating: IP20
• Mounting: DIN-rail compatible
• Dimensions (W×H×D): 54 × 78.5 × 91 mm
• Operating principle: thermal-magnetic trip

How to use

Install the miniature circuit breaker on a standard DIN rail inside an appropriate distribution enclosure, following local electrical codes and the manufacturer's installation instructions. Ensure the breaker is suitable for the nominal system voltage and intended load. Terminate conductors into the line and load terminals with correct torque and verify polarity where applicable. After installation, switch the breaker on and test the circuit for correct operation and absence of faults before connecting sensitive equipment.

Recommendations

For reliable operation, use the breaker within its rated current and voltage limits, ensure proper coordination with upstream protection, and perform periodic inspections of terminal tightness and enclosure condition. Do not expose the device to wet or corrosive environments beyond IP20 limitations; select higher IP-rated solutions where required.