Pure Type 1 50kA Ultra-High Capacity Protection for Extreme Lightning Areas

Product Overview

NPS01-FA50 AC 1P Surge Protective Device is an ultra-high capacity pure spark gap Type 1 (Class I) SPD designed for extreme lightning environments and critical power loads.

The product complies with EN/IEC 61643-11 and GB/T 18802.11 standards and adopts advanced graphite spark gap technology with an extremely high lightning impulse current capability of Iimp 50kA (10/350μs).

It can directly discharge massive lightning energy from direct strikes and provides primary protection for core power distribution systems in high-risk lightning areas.

The device features a reinforced 36mm single-pole modular design, supports 35mm DIN rail installation, and covers Uc voltage levels from 275V to 385V.

It is widely used in power substations, core data centers, communication hubs, rail transit control centers, and other critical infrastructure.

Ultra-Large Graphite Spark Gap, Extreme Energy Withstand Capability

The internal structure uses an ultra-large high-purity graphite spark gap, providing excellent follow current interruption capability and extreme energy withstand performance.

During normal operation, the SPD maintains zero leakage current and zero power consumption, ensuring long service life and stable protection performance.

The reinforced graphite electrode structure provides stable discharge characteristics and withstands repeated ultra-high current lightning impulses without performance degradation.

The conductive path adopts high-purity copper materials and large terminals, ensuring low resistance, strong current carrying capability, and reduced temperature rise under extreme surge conditions.

The housing uses UL94V-0 flame-retardant material with IP20 protection rating, meeting high-level insulation and safety requirements.

630A Backup Fuse Compatible for Ultra-High Current Systems

Technical specifications:

Nominal discharge current In: 50kA (8/20μs)
Voltage protection level Up: 1.5kV
Response time ≤100ns
Recommended backup fuse: 630A gG
Cable size: 4-35mm²
Operating temperature: -40℃ to +80℃

Integrated thermal disconnection and red/green status indication provide convenient maintenance and fault identification.

Optional remote alarm contacts support centralized monitoring and system management.

A high-reliability Type 1 lightning protection solution for ultra-high-current power distribution systems.

Model	NPS01-FA50/275/1	NPS01-FA50/320/1	NPS01-FA50/385/1
SPD Test Category	Type1/ClassI (EN/IEC61643-11, GB/T18802.11)
Maximum Continuous Operating Voltage Uc (Current Type: a.c.)	275V	320V	385V
Lightning Impulse Current (10/350μs) [L-PE, N-PE] Iimp	50kA	50kA	50kA
Nominal Discharge Current (8/20μs) [L-PE, N-PE] In	50kA
Maximum Discharge Current (8/20μs) [L-PE, N-PE] Imax	1.5kV	1.5kV	1.5kV
Voltage Protection Level [L-PE, N-PE] Up	≤100ns
Response Time	630A 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)	35mm² Standard Wire / 25mm² 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.