LY1-D20M/4(S) PLUGGABLE MULTI-POLE SPD

Description：

Class ll ·Class lll ·Type 2 ·Type 3
Location of Use: Sub-Distribution Boards
Mode of Protection: L-PE, N-PE
Surge Ratings: In = 10 kA (8/20 μs)
IEC/EN/UL Category: Class ll+lll /Type 2+3
Protective Elements: High Energy MOV
Housing: Pluggable Design
Compliance: lEC 61643-11:2011
EN 61643-11:2012

Our mini size 20kA 4P GDT AC surge protection device is specially designed for compact three-phase AC systems requiring reliable surge suppression at moderate surge levels. As an experienced SPD manufacturer, supplier, and OEM/ODM factory, we support wholesale, bulk buy, and in bulk orders for integrators and distributors worldwide. Utilizing a Neon gas (Ne) GDT, this model provides excellent isolation performance, low residual current, and long service life.

Compliant with IEC 61643-11:2011 / EN 61643-11:2022, and certified with CE & TUV, the device meets international performance and safety standards. As a factory specializing in SPD production, we provide OEM customization for specifications, housing, branding, and packaging. This mini size model is recommended for wholesalers and distributors seeking cost-effective yet reliable GDT-based surge protection.

Applicable scenarios / Application industries

The device is ideal for small distribution boxes, HVAC control systems, and compact industrial panels.

The body is made of PVC/PA66/PBT, offering excellent thermal resistance, flame retardancy, and structural strength. The 4-pole configuration protects L1 + L2 + L3 + N, making it suitable for three-phase four-wire networks in commercial and industrial applications. Despite the mini size, it delivers a stable 20kA surge capacity, ideal for systems with moderate surge exposure.

■ 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	10 kA
Maximum Discharge Current (8/20 μs)	Imax	20 kA
Voltage Protection Level	Up	0.2 kV	0.6 kV	1.3 kV	1.5 kV	1.5 kV	1.8 kV
Response Time	tA	< 25 ns
Back-Up Fuse (max)		125 A gL / gG
Short-Circuit Current Rating (AC)	ISCCR	10kA
TOV Withstand 5s	UT	90V	180V	335V	335V	335V	580V
TOV 120min	UT	115V	230V	440V	440V	440V	765V
	mode	Withstand	Withstand	Safe Fail	Safe Fail	Safe Fail	Safe Fail
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-D20M/4(S) PLUGGABLE MULTI-POLE SPD

1.What is the purpose of the LY1-D20M/4(S)?
This model is a four-pole Type 2 surge protector designed for three-phase AC systems with neutral (L1-L2-L3-N), delivering balanced multi-line protection.

2.What surge components are used?
The LY1-D20M/4(S) uses MOV varistors to absorb surge energy from lightning and electrical switching events.

3.Can each protection pole be replaced separately?
Yes. The pluggable design allows independent cartridge replacement for each pole.

4.Where is this SPD normally applied?
It is suitable for industrial three-phase panels, commercial distribution boards, machinery power systems, and building electrical cabinets.

5.What standards does this SPD comply with?
It meets IEC/EN 61643-11 international surge protection standards and is CE & TUV certified.

6.Is the installation easy?
Yes, it supports 35 mm DIN-rail installation for quick integration in electrical panels.