AC SPDs T1+T2 FLP12,5 series

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AC Surge Protection Device T1+T2 12,5kA FLP12,5 series

Surge protective device SPD, arrester type 1+2 (class I+II, class B+C) for use in AC power supply systems.

The AC Surge Protection Device T1+T2 12,5kA FLP12,5 line is a group of Class I+II Surge Protective Devices. They are intended as a protection against indirect and low-intensity direct hits of lightning strokes. In standard three-phase TN-C grid, they provide protection to LPL III, IV requirements given in EN 62305 with total lightning current introduced into the electrical installation of 50 kA and total lightning stroke current 75 or 100 kA based on physical configuration and mutual position of grounding point of the lightning rod, grounding point of the electrical installation and place of SPD installation.

The design of FLP12,5 is based on high energy Metal Oxide Varistors. Such design provides low response time and ensures characteristics for both classes I and II. The modular design with plug-in inserts allows simple and quick replacement of function modules in case of MOV is beyond if its lifespan due to high intensity or often occurrence of overvoltage peaks.

General parameters
Suitable for protection of electrical installations against transient overvoltage and indirect lightning strikes
Plug-in module design
Indication window and optional remote-signaling contact helps users to know the status of device
Due to Iimp 12,5 kA per module suitable for LPL III and LPL IV according to EN 62305 in standard 3-phase TN-C and TN-S installations
Electrical parameters

1P, 2P, 3P, 4P, 1P+N, 2P+N, 3P+N

(L-N/PE/PEN connection)

1P+N, 2P+N, 3P+N

(N-PE connection)

SPD according to

EN 61643-11 / IEC 61643-11

Type 1+2 / Class I+II
TechnologyMOV (Varistor)Graphite / 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)20 kA
Max. impulse current Iimp (10/350 μs)12,5 kA50 kA
Max discharge current Imax (8/20 μs)50 kA
Voltage protection level Up≤ 1.2 kV  ①≤ 1.8 kV  ②≤ 2.0 kV  ③1.5 kV
≤ 2.2 kV  ④≤ 2.4 kV  ⑤≤ 2.8 kV  ⑥
Voltage protection Up at 5 kA (8/20 μs)≤ 1 kV
Follow current extinguishing capability Ifi100 Arms
Temporary overvoltage (TOV) (UT )

– 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 U C IPE≤ 1 mA
Response time ta≤ 25 ns≤ 100 ns
Max. mains-side over-current protection160 A gL/gG
Short-circuit current rating ISCCR25 kArms
Number of ports1
Type of LV systemTN-C, TN-S, TT (1P+N, 3P+N)
Remote contact (optional)1 changeover contact
Remote signalling alarming mode

Normal: closed;

Failure: open-circuit

The prospective short-circuit current according to 7.1.1 d5 of IEC 61643-115 A
Protection functionOvercurrent
Remote contact op. voltage / current

AC Umax / Imax

DC Umax / Imax

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 width18, 36, 54, 72 mm
Device height67 mm
Method of mountingfixed
Operating state / fault indicationgreen / red
Degree of protectionIP 20
Cross-sectional area (min.)1.5 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%
Cross-sectional area for remote

signalling terminals

max. 1.5 mm2 solid / flexible


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 12.5 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 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 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 specific time should be based on the order quantity.

Packaging & Shipping

Packaging & Shipping

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