FV25B/4-XXX type1 In25kA 3 phase surge suppressor

FV25B/4-XXX

FATECH FV25B/4-XXX series are Class I Type 1 four‑pole AC surge protective devices for TT and TN three‑phase power systems. With Iimp 25kA, In 25kA, fast response ≤100ns and mechanical status indication, they provide full lightning surge protection for L1/L2/L3/N‑PE circuits. Featuring DIN‑rail mounting, high insulation, wide voltage range and optional remote contact, they ensure stable and safe operation for industrial and commercial power distribution equipment.

-Apopt unique designed seal construction with multilayer spark gap,no spark emission outside the housing.

-With working status indication window,and remote control contacts.

-Max.continuos operating voltage (Uc) 150v,255v,275v,320v,385v for your option.

-Mainly used in lightning protection zone (LPZ) 0 to 1,widely used in building entrance lines elevator,mineral,and so on.

– 3 phase，4 poles.

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Advantage

Stable & Reliable Surge Protection

Adopts high-quality core components and precise circuit design, providing stable and consistent performance to effectively suppress lightning surges and transient overvoltage, ensuring long-term safe operation of equipment.

Wide Application Compatibility

Covers AC, DC, photovoltaic, PoE network, and signal surge protection solutions, widely used in solar systems, LED lighting, industrial control, security monitoring, buildings and infrastructure.

Durable Structure & Easy Installation

Features rugged housing (including aluminum enclosure for outdoor models), DIN‑rail mounting, pluggable design and compact size for easy installation, wiring and maintenance in various working environments.

Certified Quality & Cost-Effective

Most core products have passed TUV, CE and international safety certifications, with strict quality control. Stable performance and reasonable pricing bring high cost-performance for global projects.

FV25B/4-150

UN : 110/220V

Uc : 150V

In : 25kA

Iimp : 25kA

Up ≤ 1.6kV

FV25B/4-255

UN : 220/380V

Uc : 255V

In : 25kA

Iimp : 25kA

Up ≤ 1.6kV

FV25B/4-275

UN : 220/380V

Uc : 275V

In : 25kA

Iimp : 25kA

Up ≤ 1.6kV

FV25B/4-320

UN : 220/380V

Uc : 320V

In : 25kA

Iimp :25kA

Up ≤ 1.8kV

FV25B/4-385

UN : 220/380V

Uc : 385V

In : 25kA

Iimp : 25kA

Up ≤ 1.8kV

Coding system of surge suppressor FV25B/4-XXX

Dimension and circuit drawing of surge suppressor FV25B/4-XXX

Installation of surge suppressor FV25B/4-XXX

Electrical parameters

Model. No.		FV25B/4-150(S)	FV25B/4-255(S)	FV25B/4-275(S)	FV25B/4-320(S)	FV25B/4-385(S)
Test class IEC/EN/VDE		Class I/B/T1
Type of Network		TT,TN
Protection Mode		L1,L2,L3,N-PE
Nominalvoltage 50(60)Hz UN		110/220V	220/380V	220/380V	220/380V	220/380V
Rated Voltage (Max. Cont. Operating Voltage) Uc		150V	255V	275V	320V	385V
Impulse currenr(10/350us)Iimp		25kA
Nominal discharge current (8/20us) In		25kA
Voltage protective level Up		≤1.6kV	≤1.6kV	≤1.6kV	≤1.8kV	≤1.8kV
Response time tA		≤100ns
Recommended back-up fuse		315A
Isolation resistance		＞102MΩ
I/O Connections	L-N	Multi core wire:10mm2~25mm2
	PE	Multi core wire:＞16mm2
Mounting		35mm Symmetrical rail(EN50022/DIN46277-3)
Operation temperature range/humidity /altitude		-40°C~+80°C / 30%~90% / 3000m
Degree of protection		IP20
Housing material		UL94V-0
Disconnectionindicator		Mechanical indicator (Green：OK Red: replace)
Remote controlcontact		Optional

Searching For A Reliable SPD & Surge Protector To Secure Your Projects?

MOQ is flexible and can be negotiated. Depending on your system solution, Accept Customization for Small Orders. Design products as your specification. Professional protection and stable performance for global projects. Submit an online message. Reply within 24 hours by email.

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