LY1-12.5/3(S)+1 PLUGGABLE MULTI-POLE SPD

Description：

Classl·Classll·Type 1 Type 2
Location of Use: Main Distribution Boards
Mode of Protection: L-N, N-PE
Surge Ratings: Limp= 12.5 kA(10/350 μs)
Ln= 20 kA (8 /20 μs)
IEC/EN/UL Category: Class l+ll /Type 1+2
Protective Elements: High Energy MOV and GDT
Housing: Pluggable Design
Compliance: lEC 61643-11:2011
EN 61643-11:2012
UL 1449 4th Edition

As a specialized 50kA 3P+N GDT AC surge protective device supplier, we manufacture advanced SPDs for industrial three-phase systems. Our factory supports OEM, wholesale, and bulk buy distribution worldwide.

With graphite (C) materials, IP65-rated casing, and DIN-rail installation, it offers durability and easy maintenance.

All models are CE approved with a 2-year warranty, available for OEM customization and in bulk supply. We are your trusted factory partner for industrial-grade lightning and surge protection.

Applicable scenarios / Application industries

The 3P+N GDT SPD combines Neon-gas discharge tubes and MOV ZnO components for rapid and stable surge handling. It’s suitable for switchboards, PV combiner boxes, and data center power lines.

■ Technical Data
IEC Electrical			75	150	275	320
Nominal AC Voltage (50/60Hz)		Uo/ Un	60 V	120 V	230 V	230 V
Maximum Continuous Operating Voltage (AC)	(L-N)	Uc	75V	150 V	275 V	320 V
Maximum Continuous Operating Voltage (AC)	(N-PE)	Uc	255 V	255 V	255 V	255 V
Nominal Discharge Current (8/20 μs)	(L-N) / (N-PE)	In	20 kA / 50 kA
Maximum Discharge Current (8/20 μs)	(L-N) / (N-PE)	Imax	50 kA /100 kA
Impulse Discharge Current (10/350 μs)	(L-N) / (N-PE)	Iimp	12.5 kA / 50 kA
Specific Energy	(L-N) / (N-PE)	W/R	39 kJ/Ω / 625 kJ/Ω
Charge	(L-N) / (N-PE)	Q	6.25 As / 25 As
Voltage Protection Level	(L-N) / (N-PE)	Up	0.7 kV / 1.5 kV 1 kV / 1.5 kV 1.5 kV / 1.5 kV 1.6 kV / 1.5 kV
	(N-PE)	Ifi	100 ARMS
Response Time	(L-N) / (N-PE)	tA	< 25 ns / < 100 ns
Back-Up Fuse (max)			315 A / 250 A gG
Short-Circuit Current Rating (AC)	(L-N)	ISCCR	25 kA / 50 kA
TOV Withstand 5s	(L-N)	UT	114 V	180 V	335 V	335 V
TOV 120min	(L-N)	UT	114 V	230 V	440 V	440 V
		mode	Withstand	Safe Fail	Safe Fail	Safe Fail
TOV Withstand 200ms	(N-PE)	UT	1200 V
UL Electrical
Maximum Continuous Operating Voltage (AC)	(L-N) / (N-PE)	MCOV	75 V / 255 V	150 V / 255 V	275 V / 255 V	320 V / 255 V
Voltage Protection Rating	(L-N) / (N-PE)	VPR	330 V / 1200 V	600 V / 1200 V	900 V / 1200 V	1200 V / 1200 V
Nominal Discharge Current (8/20 μs)	(L-N) / (N-PE)	In	20 kA / 20 kA	20 kA / 20 kA	20 kA / 20 kA	20 kA / 20 kA
Short-Circuit Current Rating (AC)	(L-N)	SCCR	100 kA	200 kA	150 kA	150 kA
Mechanical & Environmental
Operating Temperature Range	Ta		-40ºF to +158ºF [-40ºC to +70ºC]
Permissible Operating Humidity	RH		5%…95%
Atmospheric pressure and altitude			80k Pa … 106k Pa / -500 m…… 2000 m
Terminal Screw Torque	Mmax		39.9 Ibf·in[4.5 Nm]
Conductor Cross Section (max)			2 AWG (Solid, Stranded) / 4 AWG (Flexible) 35 mm² (Solid, Stranded) / 25 mm²(Flexible)
Mounting			35 mm DIN Rail, EN 60715
Degree of Protection			IP 20 (built-in)
Housing Material			Thermoplastic: Extinguishing Degree UL 94 V-0
Thermal Protection			Yes
Operating State / Fault Indication			Green ok / Red defect
Remote Contacts (RC) RC Switching Capacity RC Conductor Cross Section (max)			Optional AC: 250V / 0.5 A; DC: 250V / 0.1 A;125V / 0.2 A;75V / 0.5 A 16 AWG (Solid) / 1.5 mm²(Solid)

■ Internal Configuration

■ Dimensions & Packaging

■ Connection Diagram

FAQ for LY1-12.5/3(S)+1 PLUGGABLE MULTI-POLE SPD

1.What is the main purpose of the LY1-12.5/3(S)+1 multi-pole SPD?
It provides coordinated surge protection for 2P/3P/4P AC systems, making it suitable for three-phase or multi-phase distribution networks that require synchronized protection.

2.What surge protection technology does it use?
The LY1-12.5/3(S)+1 adopts MOV-based surge absorption, optimized for repeated AC transient overvoltage environments.

3.Is this model pluggable?
Yes, each protection module is pluggable, meaning replacements can be done without disconnecting wires—ideal for industrial maintenance.

4.What standards does this SPD meet?
It is fully compliant with IEC 61643-11:2011 / EN 61643-11:2022, and certified with CE and TUV, ensuring stable performance.

5.Where can the LY1-12.5/3(S)+1 be used?
It is well-suited for commercial buildings, factory three-phase systems, machinery control cabinets, main distribution boards, and automation equipment.

6.What casing materials are used?
The housing is manufactured from PA66/PBT high-temperature flame-retardant plastic, providing structural integrity under surge currents.

7.Is OEM/ODM service available?
Yes. We specialize in OEM/ODM production for distributors, engineering companies, and brand owners worldwide.