AC Surge Protective Device SPD Type 1+2, T1+T2, Class B+C, Iimp 25kA FLP25 series

High Energy MOV and GDT based type 1 and type 2 combined lightning current and surge arrester for use in AC power supply systems.

Type 1+2 surge protectors are heavy-duty devices, designed to be installed at the origin of the AC installations equipped with LPS (Lightning Protection System). They are necessary to protect sensitive equipment connected to AC network against direct and indirect effects of lightning. Following the different national electrical codes, these SPDs can be recommended or mandatory. These surge protectors are tested following Class I (T1, Class B) tests from IEC&EN 61643-11, characterized by 10/350 μs lightning current injections.

These surge protectors are available in a wide range of versions to be adaptable to all configurations:

Iimp by pole: 25 kA
Total Iimp: up to 100 kA
Single, 3 or 3-Phase+Neutral AC network
230/400 V, 120/208 V and 690 V AC network
All AC system types
Common mode protection (CT1 configuration) or Common and Differential mode protection (CT2 configuration)

The design of FLP25 is based on High Energy MOV and GDT. Such design provides low-response time and ensures characteristics for both classes I and II. hybrid MOV+GDT combined surge protective device SPD, spark gap.

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General parameters
Suitable for protection of electrical installations against transient overvoltage caused by direct and lightning strikes or switching processes
Due to Iimp 25 kA per module suitable for LPL I – IV according to EN 62305 in standard 3-phase TN-C and TN-S installations
Electrical parameters

1+0, 2+0, 3+0, 4+0, 1+1, 2+1, 3+1

(L-N/PE/PEN connection)

1+1, 2+1, 3+1

(X+1 N-PE connection)

SPD according to

EN 61643-11 / IEC 61643-11

Type 1+2 / Class I+II
TechnologyMOV (Varistor)GDT (Spark-gap)
Nominal a.c. voltage Un120 V AC ①230 V AC ②230 V AC ③230 V AC
230 V AC ④400 V AC ⑤480 V AC ⑥
Max. continuous operational voltage Uc150 V AC ①275 V AC ②320 V AC ③255 V AC
385 V AC ④440 V AC ⑤600 V AC ⑥
Nominal frequency f50 / 60 Hz
Nominal discharge current In (8/20 μs)25 kA100 kA
Max. impulse current Iimp (10/350 μs)25 kA

50 kA (1+1)

100 kA (2+1, 3+1)

Impulse current specific energy W/R156,25 kJ/ohms2,5 MJ/ohms
Max discharge current Imax (8/20 μs)100 kA
Voltage protection level Up1.0 kV ①1.5 kV ②1.6 kV ③1.5 kV
1.8 kV ④2.0 kV ⑤2.5 kV ⑥
Voltage protection Up at 5 kA (8/20 μs)≤ 1 kV
Follow current extinguishing capability Ifi100 Arms
Follow current limitation / Selectivityno tripping of a 20 A gL/gG fuse up to 50 kA (prosp.)
Temporary overvoltage (TOV) (U ) T

– Characteristic (withstand)

180 V / 5 sec ①335 V / 5 sec ②335 V / 5 sec ③1200 V / 200 ms
335 V / 5 sec ④580 V / 5 sec ⑤700 V / 5 sec ⑥
Temporary overvoltage (TOV) (U ) T

– Characteristic (safe failure)

230 V / 120 min ①440 V / 120 min ②440 V / 120 min ③
440 V / 120 min ④765 V / 120 min ⑤915 V / 120 min ⑥
Residual current at Uc IPE≤ 1 mA
Response time ta≤ 25 ns≤ 100 ns
Max. mains-side over-current protection315 A gL/gG
Short-circuit current rating ISCCR50 kArms
Number of ports1
Type of LV systemTN-C, TN-S, TT (1+1, 2+1, 3+1)
Remote contact (optional)changeover contact
Remote signalling alarming mode

Normal: closed;

Failure: open-circuit

The prospective short-circuit current

according to 7.1.1 d5 of IEC 61643-11

5 A
Protection fuctionOvercurrent
Remote contact op. voltage / current

AC U max / I max

DC U max / I max

250 V AC / 0.5 A

250V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A

Mechanical parameters
Device length90 mm
Device width36, 72, 108, 144 mm
Device height65 mm
Method of mountingfixed
Degree of protectionIP 20
Cross-sectional area (min.)10 mm2 solid /flexible
Cross-sectional area (max.)35 mm2 stranded / 25 mm2 flexible
For mounting on35 mm DIN rail acc. to EN 60715
Enclosure materialthermoplastic
Place of installationinstallation indoor
Range of operating temperatures Tu-40 °C … +70 °C
Atmospheric pressure and altitude80k Pa … 106k Pa, -500 m … 2000 m
Humidity range5% … 95%


Q1: Selection of surge protector

Al: The grading of the surge protector (commonly known as lightning protection) Is assessed according to the IEC61024 subdivision lightning protection theory, which is installed at the junction of the partition. Technical requirements and functions differ. The first-stage lightning protection device is installed between the 0-1 zone, high for the flow requirement, the minimum requirement of EN 61643-11 / IEC 61643-11 is 25 ka (10/350), and the second and third levels are installed between the 1-2 and 2-3 zones, mainly to suppress the overvoltage.

Q2: Are you a lightning surge protectors factory or lightning surge protectors trading company?

A2: We are a lightning surge protectors manufacturer.

Q3: Warranty and services:

A3:1. Warranty 5 years

2. lightning surge protectors products and accessories have been tested 3 times before ship out.

3. We own the best after-sale service team, if any problem happens, our team will do our best to solve it for you.

Q4: How can I get some lightning surge protectors samples?

A4: We are honored to offer you lightning surge protectors samples, pis contact our staff, and leave detailed contact information, we promise to keep your information confidential.

Q5: Is the sample available and free?

AS: Sample is available, but the sample cost should be payable by you. The cost of the sample will be refunded after further order.

Q6: Do you accept customized order?

A6: Yes, we do.

Q7: What’s the delivery time?

A7: It usually takes 7-15days after confirming payment, but a specific time should be based on the order quantity.

Packaging & Shipping

Packaging & Shipping

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