GFU1Z-Ⅰ+Ⅱ DC Surge Protective Device

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Product Classification

Surge Protective Device

The GFU1Z-Ⅰ+Ⅱ DC Surge Protective Device (SPD) is a high-performance protection solution designed for direct current (DC) power systems, effectively safeguarding sensitive electrical equipment against transient overvoltages caused by lightning strikes, switching surges, and other electromagnetic interference.
● Certification：IEC 61643-31.
● Kind of test：Type1+2/ClassⅠ+Ⅱ
● Number of poles：2:2P，3:3P
● Maximum continuous operating voltage (Uc)：2P（1000VDC）,3P（1500VDC）
● Nominal discharge current (8/20μs) (In)：20kA
● Maximum discharge current (8/20μs) (Imax)：50kA
● Operating Temperature Range： -35 ºC to+70 ºC
● Operating state/fault indication：Green/Red

E-mail:

gf@gf-ele.com

Product Description

●Introduction ●Model and Meaning

ⒶKey Features
● Dual-Stage Protection (Ⅰ+Ⅱ) – Combines Class I+II protection for comprehensive surge suppression, ensuring robust defense against both high-energy surges and fast transients.
● Wide Voltage Range – Compatible with various DC systems (e.g., 24V，48V，68V，110V，150V，340V，500V，600V，800V，1000V 1200V，1500V etc.), making it suitable for solar PV systems, telecom base stations, and industrial DC power applications.
● Low Residual Voltage – Minimizes let-through voltage to protect downstream equipment effectively.
● Thermal Disconnect & Visual Indication – Built-in thermal protection and fault alarm (mechanical or remote signaling options available) for easy maintenance and safety.
● High Surge Current Capacity – Withstands impulse currents up to 20kA (8/20μs), ensuring long-term reliability.
● Compact & Easy Installation – Modular design for DIN rail mounting, saving space and simplifying deployment.
ⒷApplications:
● Solar PV systems (DC side protection)
● Telecommunications & 5G infrastructure
● Railway/tram DC power supplies
● Industrial control systems & DC microgrids
● Ensure uninterrupted DC power safety with GFU1Z-Ⅰ+Ⅱ SPD – your reliable defense against surges!

●Technical parameters

Product model	GFU1Z-Ⅰ+Ⅱ
Kind of test	Type1+2/ClassⅠ+Ⅱ
Protected mode	（DC+）-PE，(DC-)-PE，(DC+)-(DC-)
Number of poles	2P	3P
Maximum continuous operating voltage (Uc)	1000VDC	1500VDC
Nominal discharge current (8/20μs) (In)	20kA
Impulse current (10/350μs) (Iimp)	6.25kA
Maximum discharge current (8/20μs) (Imax)	50kA
Total discharge current (10/350μs) (Itotal)	12.5kA
Voltage protection level (Up)	3.8kV	5.0kV
Response time（L-N）/(N-PE)(tA)	≤25ns/≤100ns
Operating Temperature Range	-35 ºC -+70 ºC
Work Status / Fault Indication	Green/red
Remote signaling terminal wiring capability	Maximum 4-35mm²
Tightening torque	2-3.5N·m
levels of protection	IP20
Installation	Mounting on 35mm DIN rail

●Product Types Choosing

Number of poles	Maximum continuous operating voltage (Uc)	Impulse current (10/350μs) (Iimp)	Total discharge current (10/350μs) (Itotal)
Number of poles	Maximum continuous operating voltage (Uc)	6.25kA	12.5kA
2P	1000VDC	GFU1Z-Ⅰ+Ⅱ6.25-10002S	GFU1Z-Ⅰ+Ⅱ12.5-10002S
3P	1500VDC	GFU1Z-Ⅰ+Ⅱ6.25-15003S	GFU1Z-Ⅰ+Ⅱ12.5-15003S

●Circuit Diagram ●Appearance and Installation Dimensions

Keywords:

GFU1Z-Ⅰ+Ⅱ DC Surge Protective Device

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