Square D Multi 9 Ground Fault Protector, 4-Pole, 480Y/277V, Type A-SI, 40A, 260 mA Instantaneous
$594.48
The Square D Multi 9 Ground Fault Protector (Model M9R84440) is a 4-pole Type A-SI device rated for 480Y/277V and 40A, with 260 mA instantaneous trip sensitivity. Provides reliable ground fault protection for three-phase wye-connected systems in commercial and industrial applications.
Square D Multi 9 Ground Fault ...
$594.48
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Square D Multi 9 Ground Fault Protector – 4-Pole, 40A, 480Y/277V
The Square D (Schneider Electric) Multi 9 Ground Fault Protector (M9R84440) delivers Type A-SI ground fault protection for 4-wire, three-phase wye electrical systems. Rated at 480Y/277V and 40A with a 260 mA instantaneous trip threshold, this device is built for commercial and industrial branch circuit protection in Multi 9 modular panel systems.
Key Specifications
- Manufacturer: Square D (Schneider Electric)
- Model: M9R84440
- UPC: 78590176433
- Type: A-SI Ground Fault Protector
- Number of Poles: 4
- Voltage Rating: 480Y/277V AC
- Current Rating: 40A
- Trip Sensitivity: 260 mA Instantaneous
Features & Benefits
- Type A-SI classification covers both AC and pulsating DC ground fault currents
- Instantaneous 260 mA trip for rapid fault isolation
- 4-pole design protects all phase conductors and neutral in 3-phase wye systems
- Modular Multi 9 form factor for straightforward panel integration
Applications
Suitable for protecting 3-phase branch circuits in commercial buildings, data centers, and industrial facilities operating at 480Y/277V. Meets NEC requirements for ground fault protection on applicable feeders and branch circuits.
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