Item No.: LY1-12.5/3(S)

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

Description：

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

We are a leading 50kA 3 pole AC surge protective device manufacturer, producing reliable protection devices for three-phase TN-S and TT power systems. As a specialized factory, we offer OEM, wholesale, and bulk buy solutions for worldwide customers.

Designed with graphite (C) materials and IP65 sealing, it’s durable and fire-resistant. The 35mm DIN rail design ensures easy maintenance and replacement.

We provide OEM-branded SPDs and supply in bulk at factory pricing. With CE certification and a 2-year warranty, this model offers reliable and affordable protection for three-phase equipment.

Applicable scenarios / Application industries

Our 3P SPD is built with MOV ZnO and GDT (Neon gas) hybrid technology, ensuring both high surge capacity and stable insulation resistance. Ideal for industrial automation, solar systems, and power control panels, it safely discharges up to 50kA surges per phase.

■ Technical Data
IEC Electrical		75	150	275	320	385	440
Nominal AC Voltage (50/60Hz)	Uo/ Un	60 V	120 V	230 V	230 V	230 V	400 V
Maximum Continuous Operating Voltage (AC)	Uc	75 V	150 V	275V	320 V	385 V	440 V
Nominal Discharge Current (8/20 μs)	In	20 kA	20 kA	20 kA	20 kA	10 kA	10 kA
Maximum Discharge Current (8/20 μs)	Imax	50 kA	50 kA	50 kA	50 kA	50 kA	50 kA
Impulse Discharge Current (10/350 μs)	Iimp	12.5 kA	12.5 kA	12.5 kA	12.5 kA	10 kA	10 kA
Specific Energy	W/R	39 kJ/Ω	39 kJ/Ω	39 kJ/Ω	39 kJ/Ω	25 kJ/Ω	25 kJ/Ω
Charge	Q	6.25 As	6.25 As	6.25 As	6.25 As	5 As	5 As
Voltage Protection Level	Up	0.7 kV	1 kV	1.5 kV	1.6 kV	1.8 kV	2 kV
Response Time	tA	< 25 ns
Back-Up Fuse (max)		315 A / 250 A gG
Short-Circuit Current Rating (AC)	ISCCR	25 kA / 50 kA
TOV Withstand 5s	UT	114 V	180V	335V	335V	335V	580V
TOV 120min	UT	114 V	230V	440V	440V	440V	765V
	mode	Withstand	Safe Fail	Safe Fail	Safe Fail	Safe Fail	Safe Fail
UL Electrical
Maximum Continuous Operating Voltage (AC)	MCOV	75 V	150 V	275 V	320 V	385 V	440 V
Voltage Protection Rating	VPR	300 V	600 V	900 V	1200 V	1350 V	1500 V
Nominal Discharge Current (8/20 μs)	In	20 kA	20 kA	20 kA	20 kA	20 kA	20 kA
Short-Circuit Current Rating (AC)	SCCR	100 kA	200 kA	150 kA	150 kA	150 kA	200 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)PLUGGABLE MULTI-POLE SPD

1. What are the advantages of the LY1-12.5/3(S) multi-pole SPD?
This multi-pole design provides coordinated surge protection for multi-phase AC systems, making it ideal for three-phase power networks.

2. Is the pluggable module replaceable?
Yes, each protection module is fully pluggable, allowing fast replacement without altering the fixed base wiring.

3. Which surge-protection technology does it use?
The SPD is based on MOV varistor protection, ideal for handling repetitive AC transients.

4. Does this product meet IEC safety standards?
Absolutely. It is manufactured under IEC 61643-11:2011 / EN 61643-11:2022, with CE and TUV certification.

5. What typical applications use this multi-pole SPD?
It is suitable for APC cabinets, industrial control panels, factory distribution boards, and commercial building mains input.

6. Do you provide OEM/ODM bulk orders?
Yes, as a professional factory, we support OEM, ODM, bulk wholesale orders, and customized product configurations.

7. Is there an indicator for protection status?
Yes, each pluggable module includes a clear visual indicator window for real-time status monitoring.