Circuit breaker Schneider Electric INS44324 24A 3P 30mA Type A

The Schneider Electric INS44324 24A 3P 30mA Type A residual current circuit breaker combines overcurrent protection with earth-leakage detection in a compact three-pole unit designed for use in residential and commercial distribution boards. It provides coordinated short-circuit and overload interruption while detecting residual currents down to 30 mA with Type A sensitivity, which covers AC and pulsating DC leakage. The device is intended for protecting circuits feeding sockets, lighting and small appliances where both thermal-magnetic protection and residual-current monitoring are required.

Advantages

The unit integrates thermal-magnetic overcurrent tripping and residual-current detection in a single modular device, saving panel space and simplifying wiring. Type A sensitivity improves detection of pulsating DC leakage that can appear with modern electronic equipment. With a rated current of 24 A and three-pole configuration, the breaker protects multi-phase circuits and maintains coordinated protection in small distribution boards. Installation and maintenance are facilitated by a clearly marked test button and standardized DIN-rail mounting.

Suitable for

• Protection of three-phase circuits in residential and light commercial electrical panels
• Circuits that supply sockets, small motors, lighting and single-phase loads derived from a three-phase supply
• Installations with equipment that can generate pulsating DC leakage, such as variable-speed drives and electronic power supplies

Key specifications

• Rated current: 24 A
• Poles: 3 (three-pole)
• Residual operating current: 30 mA
• Sensitivity type: Type A (AC and pulsating DC detection)
• Protection functions: overcurrent (thermal-magnetic) and residual-current interruption
• Mounting: DIN-rail compatible modular form factor suitable for standard distribution boards

How to use

Mount the circuit breaker on a standard DIN-rail inside the distribution board with appropriate clearances and secure connections for line and load conductors. Connect the three phase conductors to the line terminals and the outgoing load conductors to the load terminals, ensuring torques and conductor sizes match the installation requirements. Verify correct operation by pressing the built-in test button after energization and perform periodic tests as part of routine electrical maintenance. Ensure upstream coordination with supply protection and downstream devices when integrating into existing systems.

Usage recommendations

Use this device where 24 A rated protection and 30 mA Type A residual-current sensitivity meet the circuit protection plan. Confirm compatibility with connected equipment that may produce DC leakage and coordinate with local electrical regulations for earth-leakage protection. Regularly test the trip function and inspect connections for signs of overheating or corrosion.