40kA Type 2 3+1P Full Protection, Universal Solution for Three-Phase Four-Wire Systems

Product Overview

The NPS01-F40 AC 3+1P Surge Protective Device is a Type 2 SPD designed for three-phase four-wire power systems.

Complying with IEC 61643-11 and GB/T 18802.11 standards, it adopts a classic 3+1P protection structure, providing independent protection for three-phase lines and neutral line.

With a nominal discharge current of 40kA and maximum discharge current of 80kA, it effectively suppresses induced lightning surges and switching overvoltage.

The device is compatible with common TN-S and TN-C-S systems and is widely used in:

Building power distribution
Industrial workshops
Machine control cabinets
Complete distribution boxes

Four Independent Protection Paths, Enhanced Safety Performance

Each protection path uses high-quality MOV chips with:

Fast response
Strong surge resistance
Low leakage current
Long-term stability

Each circuit is equipped with an independent thermal disconnection device. In case of overheating or overload, the faulty path can be isolated without affecting other circuits.

The red/green status indicator provides quick operation checks, and optional remote alarm contacts support connection to monitoring systems.

Compact Modular Structure for Complete Protection Systems

Technical features:

UL94V-0 flame-retardant housing
IP20 protection rating
35mm DIN rail installation
Operating temperature: -40℃ to +80℃
Cable size: 4-25mm²

Combined with front-end Type 1 SPDs, it creates a complete multi-stage lightning protection system and is an ideal choice for three-phase four-wire distribution applications.

Model	NPS01-F40/275/3+1	NPS01-F40/320/3+1	NPS01-F40/385/3+1	NPS01-F40/440/3+1
SPD Test Category	Type2/ClassII (EN/IEC61643-11, GB/T18802.11)
Maximum Continuous Operating Voltage Uc (Current Type: a.c.)	275V(NPE255V)	320V(NPE255V)	385V(NPE255V)	440V(NPE255V)
Lightning Impulse Current (10/350μs) [L-PE, N-PE] Iimp	20kA
Nominal Discharge Current (8/20μs) [L-PE, N-PE] In	40kA
Maximum Discharge Current (8/20μs) [L-PE, N-PE] Imax	1.2kV	1.3kV	1.5kV	1.7kV
Voltage Protection Level [L-PE, N-PE] Up	≤25ns(NPE100ns)
Response Time	80A gG Fuse
Backup Fuse	Normally Open and Normally Closed Contact Terminals
Remote Signal Alarm	AC: 250V/0.5A; 125V/1A; DC: 30V/0.1A
Remote Alarm Signal Energy Un/In	0.5mm² to 1.5mm²
Remote Alarm Signal Connection Wire	Floating Changeover Contact
Remote Contact Type	-40℃ to +80℃; 5%~95%
Temperature and Humidity Range	Red: Failed; Green: Normal
Disconnector Operation Indicator	4mm² Solid Wire / Flexible Wire
Minimum Installation Conductor Cross-Section Area (L, N, PE)	25mm² Standard Wire / Flexible Wire
Maximum Installation Conductor Cross-Section Area (L, N, PE)	35mm Standard DIN Rail
Installation Method	Red Thermoplastic Material, UL94V-0
Enclosure Material	IP20
Enclosure Protection Degree	W×L×H: 72×91×66mm
Note: The above products can be optionally equipped with a remote signaling function. Products with remote signaling will have "/FM" added after the original model number, such as NPS01-FBC7/275/1/FM.