2P High-Current Full-Mode Protection for Single-Phase Power Systems

Product Overview

The NPS01-FBC12.5 AC 2P Surge Protective Device is a Type 1+2 combined high-energy protection unit designed for single-phase 220V power distribution systems. Manufactured according to EN/IEC 61643-11 and GB/T 18802.11 standards, it provides comprehensive Class I+II surge protection.

The two-pole full-mode structure integrates complete protection between L-N, L-PE, and N-PE circuits, effectively suppressing both common-mode and differential-mode overvoltage caused by lightning strikes and switching operations.

With an impulse current capability of 12.5kA (10/350μs), the device provides enhanced energy withstand performance for demanding applications. The 36mm modular design supports 35mm DIN rail installation, with Uc voltage options from 275V to 440V.

It is widely used in data centers, medical equipment systems, precision manufacturing facilities, and other single-phase applications requiring high power quality.

Large-Capacity Multi-Impulse Protection for Long Service Life

Each protection pole adopts a large graphite spark gap combined with a high-energy zinc oxide varistor. Through repeated lightning impulse testing, the product demonstrates strong resistance against multiple surge events without significant performance degradation.

High-grade components are selected and verified through high-temperature aging, humidity cycling, and impulse testing to achieve low leakage current, strong energy endurance, and extended service life.

The conductive path uses T2 copper busbars with tin-plated surfaces, ensuring excellent conductivity, low contact resistance, and stable operation under high current conditions.

The UL94V-0 flame-retardant housing provides reliable insulation and mechanical protection. Automated welding, wave soldering, module assembly, and 100% factory impulse testing ensure consistent quality.

160A Backup Fuse Coordination for Continuous Power Supply

The product provides 20kA (8/20μs) nominal discharge current and 50kA maximum discharge current. With a voltage protection level of 1.2kV and response time ≤25ns, it delivers rapid surge response and effective voltage limitation.

Recommended with a 160A gG backup fuse, the device provides proper protection coordination and helps prevent unnecessary fuse operation during lightning events, maintaining power continuity.

The thermal disconnection system and red/green status indicator provide convenient maintenance monitoring. Optional remote signaling contacts support centralized alarm and monitoring systems.

Operating from -40℃ to +80℃ with 5%-95% humidity tolerance, and compatible with 4-25mm² conductors, this product provides reliable full-mode surge protection for high-demand single-phase electrical systems.

Model	NPS01-FBC12.5/275/2	NPS01-FBC12.5/320/2	NPS01-FBC12.5/385/2	NPS01-FBC12.5/440/2
SPD Test Category	Type1+2/ClassI+II(EN/IEC61643-11,GB/T18802.11)
Maximum Continuous Operating Voltage Uc (Current Type: a.c.)	275V	320V	385V	440V
Lightning Impulse Current (10/350μs) [L-PE, N-PE] Iimp	12.5kA	12.5kA	9kA	9kA
Nominal Discharge Current (8/20μs) [L-PE, N-PE] In	20kA
Maximum Discharge Current (8/20μs) [L-PE, N-PE] Imax	50kA
Voltage Protection Level [L-PE, N-PE] Up	1.2kV	1.3kV	1.5kV	1.7kV
Response Time	≤25ns
Backup Fuse	160A gG Fuse
Remote Signal Alarm	Normally Open and Normally Closed Contact Terminals
Remote Alarm Signal Energy Un/In	AC: 250V/0.5A; 125V/1A; DC: 30V/0.1A
Remote Alarm Signal Connection Wire	0.5mm² to 1.5mm²
Remote Contact Type	Floating Changeover Contact
Temperature and Humidity Range	-40℃ to +80℃; 5%~95%
Disconnector Operation Indicator	Red: Failed; Green: Normal
Minimum Installation Conductor Cross-Section Area (L, N, PE)	4mm² Solid Wire / Flexible Wire
Maximum Installation Conductor Cross-Section Area (L, N, PE)	25mm² Standard Wire / Flexible Wire
Installation Method	35mm Standard DIN Rail
Enclosure Material	440
Enclosure Protection Degree	IP20
Dimensions	W×L×H: 36×87×87mm
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.