Schneider Easy9 EZ9R66440 4P 40A 300mA Type AC RCCB
Schneider Electric EZ9R66440 is an Easy9 4-pole RCCB rated 40A with instantaneous 300mA Type AC residual-current protection. It uses voltage-independent tripping, a left-side neutral and DIN-rail mounting. Its 300mA sensitivity is distinct from 30mA additional personal protection. Overload and short-circuit protection require appropriately coordinated external devices. Schneider Electric’s Brazil listing announces discontinuation on 31 December 2026. Regional availability remains subject to quotation.
Key specifications
- Model: EZ9R66440
- Series / type: Easy9 residual current circuit breaker (RCCB)
- Poles: 4P
- Neutral position: Left
- Rated current (In): 40A
- Earth-leakage sensitivity: 300mA
- Residual-current class / delay: Type AC / instantaneous
- Tripping technology: Voltage independent
- Rated operational voltage (Ue): 400VAC, 50/60Hz
- Making and breaking capacity: 500A
- Conditional short-circuit current: 6kA with coordinated Easy9 40A MCB; not standalone overcurrent protection
- Insulation voltage (Ui): 440VAC
- Impulse withstand (Uimp): 4kV
- Surge current: 250A
- Contact-position indicator: Yes
- Mounting: Clip-on DIN rail
- Comb busbar / distribution-block compatibility: Top connection
- Connection pitch: 18mm between phases
- Width / 9mm pitches: 72mm / 8 pitches
- Dimensions (H × W × D): 82 × 72 × 72mm
- Colour: Grey RAL 7035
- Terminals: Top/bottom tunnel terminals: rigid 1–35mm²; flexible 1–25mm²
- Terminal torque: 3.5Nm
- Mechanical / electrical durability: 5,000 / 2,000 cycles (electrical at 400VAC, 50/60Hz)
- Protection degree: IP20
- Pollution degree: 2
- Relative humidity: 95% at 55°C
- Operating / storage ambient: −5 to +60°C / −40 to +85°C
- Standard: IEC 61008-1
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