40kA Type 2 1+1P Protection, Dedicated Solution for TT and IT Systems

Product Overview

The NPS01-F40 AC 1+1P Surge Protective Device is a specialized Type 2 SPD designed for single-phase TT and IT power systems.

Compliant with IEC 61643-11 and GB/T 18802.11 standards, it adopts an independent L-PE and N-PE 1+1P protection structure, providing effective protection against induced lightning surges and switching overvoltage.

With a nominal discharge current of 40kA and maximum discharge current of 80kA, it delivers precise residual voltage control and reliable protection for sensitive electrical equipment.

It is widely used in:

Medical power systems
Photovoltaic auxiliary circuits
Industrial control equipment
Special insulated distribution systems

Independent Protection Circuits, Enhanced System Safety

The device adopts a split-type high-energy MOV protection structure. The phase line and neutral line protection circuits operate independently, improving system stability and reducing interference risks.

The built-in thermal disconnector provides automatic isolation during overload or overheating conditions.

Features include:

Low leakage current
Fast response
Strong impact resistance
Long service life

The red/green status indicator allows quick condition checking, and optional remote alarm contacts support intelligent monitoring.

Space-Saving Modular Design

The device adopts standard 35mm DIN rail installation, with:

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

Its compact structure makes it ideal for space-limited distribution cabinets and can be combined with front-end Type 1 SPDs for complete cascade protection.

Model	NPS01-F40/275/1+1	NPS01-F40/320/1+1	NPS01-F40/385/1+1	NPS01-F40/440/1+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: 36×91×66mm
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.