Item No.: LY1-12.5/1(S)+1

Key Specifications：

Classl·Class ll·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 I+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

We are a high-quality 50kA 1P+N GDT AC surge protective device manufacturer, combining GDT (Neon gas) and MOV ZnO components for hybrid protection. As a factory, we provide OEM, wholesale, and bulk buy solutions worldwide.

Compatible with 35mm DIN rails, this SPD is CE certified and includes a 2-year warranty.

We supply SPDs in bulk, customized by brand, voltage, or size. Our factory focuses on high-quality, reliable surge protection for AC networks under the OEM model.

Applicable scenarios / Application industries

This SPD offers enhanced insulation resistance and lower residual voltage, making it ideal for smart homes, office buildings, and solar applications. The graphite C enclosure ensures superior flame resistance, while the IP65 design allows safe outdoor installation.

■ 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 / 25 kA
Maximum Discharge Current (8/20 μs)	(L-N) / (N-PE)	Imax	50 kA / 50 kA
Impulse Discharge Current (10/350 μs)	(L-N) / (N-PE)	Iimp	12.5 kA / 25 kA
Specific Energy	(L-N) / (N-PE)	W/R	39 kJ/Ω / 156 kJ/Ω
Charge	(L-N) / (N-PE)	Q	6.25 As / 12.5 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	Withstand	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 LY1-12.5/1(S)+1 PLUGGABLE SINGLE-POLE SPD

1.What makes the LY1-12.5/1(S)+1 suitable for single-phase AC protection?
The LY1-12-51S1 uses a pluggable single-pole MOV module, allowing quick replacement during maintenance and providing fast surge suppression for AC mains circuits.

2.Does this SPD comply with international safety standards?
Yes. It is designed and manufactured following IEC 61643-11:2011 / EN 61643-11:2022, and is certified with CE and TUV, ensuring safe use in global markets.

3.What internal technology is used inside the LY1-12.5/1(S)+1?
This model uses ZnO MOV varistors as the core surge absorption components, offering rapid clamping and stable protection performance.

4.Where is this product commonly installed?
Typical uses include distribution boxes, AC power input panels, residential mains protection, and small equipment cabinets requiring compact surge protection.

5.Is the module pluggable for easy replacement?
Yes. The pluggable cartridge design allows technicians to replace the protection module without rewiring, reducing system downtime.

6.What material is the housing made from?
The enclosure uses PA66/PBT flame-retardant material, ensuring durability and heat resistance during high-energy surge events.

7.Do you offer OEM/ODM customization?
Yes, we are an OEM/ODM factory supplying customized labels, specifications, packaging, and bulk manufacturing for global distributors.