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3P AC Surge Protector 385V 40kA - Three-Phase L-PE SPD for Industrial Equipment & Motor Control
The SPD-AC-3P-Grey is a 3-pole AC surge protection device for three-phase 3-wire low-voltage systems without neutral. It provides independent phase-to-earth (L-PE) protection on each of the three phases – L1-PE, L2-PE, and L3-PE – shielding industrial power devices and three-phase loads from surge transients caused by lightning strikes or switching events. The maximum discharge current is 40kA with a nominal of 20kA, and the voltage protection level is – .5kV per phase. A metal oxide varistor (MOV) core delivers sub-25ns response for instantaneous transient clamping. The grey flame-retardant PC housing (UL94 V-0) mounts directly on a 35mm DIN rail with a modular, hot-swappable design – modules can be replaced individually during maintenance without full rewiring. Suitable for installation in power distribution cabinets and equipment control boxes serving three-phase industrial loads.
Key Features
- 3-pole independent L-PE protection per phase: L1-PE, L2-PE, L3-PE
- 40kA max discharge current (Imax), 20kA nominal discharge current (In)
- Voltage protection level – .5kV per phase – for three-phase industrial loads
- <25ns ultra-fast response time – instantaneous transient suppression
- Metal oxide varistor (MOV) core – excellent conductivity and corrosion resistance
- Three-phase 3-wire system (no neutral) – suitable for industrial installations
- Modular hot-swappable design – individual module replacement without rewiring
- Flame-retardant PC housing (UL94 V-0), grey, 35mm DIN rail mounting
Samples available · OEM pricing on request · Ships worldwide
Technical Specifications
| Poles | 3P |
| Max. Continuous Operating Voltage (Uc) | 385V AC |
| Nominal Discharge Current (In) | 20kA |
| Max. Discharge Current (Imax) | 40kA |
| Voltage Protection Level (Up) | – .5kV |
| System Type | Three-phase 3-wire Low-voltage System (No Neutral) |
| Protection Mode | L1-PE, L2-PE, L3-PE |
| Wiring | 3 Phase Lines (L1, L2, L3), No Neutral |
| Core Component | Metal Oxide Varistor (MOV) |
| Response Time | <25ns |
| Housing Material | Flame-retardant PC (UL94 V-0), Grey |
| Mounting | 35mm DIN Rail |
| Design | Modular, Hot-swappable |
| Applications | Power Distribution Cabinet, Equipment Control Box |
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