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1P AC Surge Protector 385V 40kA - TN-S Neutral-Ground SPD for Sub-distribution & Lightning Boxes
The SPD-AC-1P-Grey is a single-pole AC surge protection device designed specifically for neutral-ground (N-PE) protection in TN-S low-voltage distribution systems. It safeguards the neutral line of single-phase systems against surge transients caused by lightning or switching events, with a maximum discharge current of 40kA and a nominal discharge current of 20kA. The voltage protection level of – .0kV ensures downstream equipment is kept within safe limits during transient events. At its core is a metal oxide varistor (MOV) that responds in under 25 nanoseconds – effectively instantaneous suppression. The grey flame-retardant PC housing (UL94 V-0 rated) snaps onto a standard 35mm DIN rail and features a modular, hot-swappable design, allowing replacement under live conditions without rewiring. Suitable for installation in sub-distribution boxes and combined lightning boxes.
Key Features
- 1-pole N-PE protection for TN-S low-voltage distribution systems
- 40kA max discharge current (Imax), 20kA nominal discharge current (In)
- Voltage protection level – .0kV – protects neutral line from transient overvoltage
- <25ns ultra-fast response time – instantaneous transient suppression
- Metal oxide varistor (MOV) core – excellent conductivity and corrosion resistance
- Modular hot-swappable design – replace without rewiring
- Flame-retardant PC housing (UL94 V-0), grey, 35mm DIN rail mounting
- Suitable for sub-distribution boxes and combined lightning boxes
Samples available · OEM pricing on request · Ships worldwide
Technical Specifications
| Poles | 1P |
| Max. Continuous Operating Voltage (Uc) | 385V AC |
| Nominal Discharge Current (In) | 20kA |
| Max. Discharge Current (Imax) | 40kA |
| Voltage Protection Level (Up) | – .0kV |
| System Type | TN-S Low-voltage Distribution System |
| Protection Mode | N-PE (Neutral to Ground) |
| Wiring | Top: Neutral / Bottom: Ground (PE) |
| 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 | Sub-distribution Box, Combined Lightning Box |
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