Legrand 411708 TX3 RCCB 4P 40A 30mA Type AC 6kA DIN Rail

Legrand 411708 TX3 is a 4-pole residual current circuit breaker (RCCB) providing earth-leakage protection in distribution boards. It detects residual currents to ground and disconnects the circuit within milliseconds, protecting against electric shock and reducing fire risk from earth faults. Rated 40A continuous current with 30mA sensitivity, Type AC for sinusoidal alternating residual currents.

Technical specifications:

• Part number: 411708
• Manufacturer: Legrand
• Series: TX3
• Type: Residual current circuit breaker (RCCB)
• Poles: 4P (3P+N)
• Rated current (In): 40 A
• Rated sensitivity (IΔn): 30 mA
• Residual current type: AC (sinusoidal)
• Rated voltage (Ue): 400 V AC
• Breaking capacity (Im): 6 kA
• Trip mechanism: Electromechanical (voltage-independent)
• Test button: Yes (monthly test recommended)
• Connection: Screw terminals up to 25 mm²
• Mounting: DIN rail (35 mm)
• Width: 4 modules (72 mm)

Features and benefits:

• Voltage-independent tripping ensures operation even on partial supply failure
• Test button validates trip mechanism without test equipment
• Sealed mechanism for long-term reliability in residential and commercial panels
• Compatible with Legrand DX3 MCBs in the same enclosure for combined RCD + overcurrent protection
• Standard 4-module width fits in any 18-module DIN rail row

Applications:

• Earth-leakage protection in residential distribution boards
• Group RCCB protection for multiple downstream MCB circuits
• Commercial offices, retail spaces, schools, and apartment buildings
• Three-phase + neutral mains protection in industrial sub-distribution
• Replacement for older RCDs in panel upgrades

Standards: IEC 61008-1, EN 61008-1, IEC 60364, RoHS compliant.

Also known as: Legrand TX3 40A 30mA 4P RCCB, Legrand RCCB 411708, 4-pole 40A residual current device, Type AC RCD.