LY1-D20/4(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+ll /Type 2+3
Protective Elements: High Energy MOV
Housing: Pluggable Design
Compliance: lEC 61643-11:2011
EN 61643-11:2012

The 20kA 4 pole AC surge protective device provides protection for three-phase + neutral (4P) systems in light-duty applications.
It integrates MOV ZnO varistors to suppress transient surges and protect electrical equipment effectively.
The housing is made from PVC/PA66/PBT, ensuring superior strength, insulation, and flame resistance.
Manufactured to IEC 61643-11:2011 / EN 61643-11:2022 standards and approved by CE & TUV.
We are an experienced surge protection factory and manufacturer, providing OEM/ODM customization, wholesale, and bulk orders worldwide.

Applicable scenarios / Application industries

Easily installed via 35mm DIN rail, suitable for solar panels, AC cabinets, and control boxes.

■ 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	10 kA	10 kA	10 kA	10 kA	10 kA
Maximum Discharge Current (8/20 μs)	Imax	20 kA	20 kA	20 kA	20 kA	20 kA	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	10 kA
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-D20/4(S)PLUGGABLE MULTI-POLE SPD

1. What is the function of the LY1-D204S?

The LY1-D20/4(S) provides four-pole AC surge protection, suitable for TN-S or TT systems requiring N-PE protection in addition to phase protection.

2. What surge protection components are used?

It is built with MOV surge elements, optimized for balanced multi-phase performance.

3. Is the device pluggable and easy to maintain?

Yes. All poles adopt a pluggable modular design, enabling quick removal and installation of cartridges.

4. Where is this SPD commonly applied?

Applications include industrial three-phase mains, power distribution panels, building automation systems, HVAC controls, and large commercial facilities.