LY1-D20M/3(S)+1PLUGGABLE MULTI-POLE SPD

Description：

Classll·Class lll·Type 2·Type 3
Location of Use: Sub-Distribution Boards
Mode of Protection: L-N, 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 and GDT
Housing: Pluggable Design
Compliance: lEC 61643-11:2011
EN 61643-11:2012

Our mini size 20kA 3P+N GDT AC SPD offers compact full-system protection for three-phase AC networks with moderate surge exposure. As a professional manufacturer and OEM/ODM factory, we serve wholesalers and distributors with bulk buy, in bulk, and wholesale supply options. This model uses Neon GDT technology, providing strong surge handling performance, low leakage, and excellent long-term durability.

Manufactured according to IEC 61643-11:2011 / EN 61643-11:2022 and certified with CE & TUV, the device offers internationally recognized safety and reliability. Our factory supports OEM customization for surge ratings, casing materials, colors, and brand labeling. For distributors seeking reliable and space-saving surge protection, this model is a dependable solution.

Applicable scenarios / Application industries

Made with PVC/PA66/PBT housing, it resists heat, mechanical stress, and electrical wear. The 3P+N configuration ensures that all three phases plus neutral receive equal protection, suitable for building distribution cabinets, industrial machines, automatic control systems, and small commercial transformers. The mini size design is perfect for limited-space environments such as control boxes and compact distribution boards.

■ 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
Nominal Discharge Current (8/20 μs)	(L-N) / (N-PE)	In	10 kA / 10 kA
Maximum Discharge Current (8/20 μs)	(L-N) / (N-PE)	Imax	20 kA / 20 kA
Voltage Protection Level	(L-N) / (N-PE)	Up	0.2 kV / 1.5 kV	0.6 kV / 1.5 kV	1.3 kV / 1.5 kV	1.5 kV / 1.5 kV
	(N-PE)	Ifi	100 ARMS
Response Time	(L-N) / (N-PE)	tA	< 25 ns / < 100 ns
Back-Up Fuse (max)			125 A gL/ gG
Short-Circuit Current Rating (AC)	(L-N)	ISCCR	10 kA
TOV Withstand 5s	(L-N)	UT	90 V	180 V	335 V	335 V
TOV 120min	(L-N)	UT	115 V	230 V	440 V	440 V
		mode	Withstand	Safe Fail	Safe Fail	Safe Fail
TOV Withstand 200ms	(N-PE)	UT	1200 V
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/3(S)+1PLUGGABLE MULTI-POLE SPD

1.What type of surge protection does the LY1-D20M/3(S)+1 provide?
This model is a multi-pole pluggable SPD designed for three-phase AC systems, offering coordinated surge suppression across all phases.

2.What internal technology does it use?
It uses MOV-based protection modules, capable of quick response and stable clamping under surge impulses.

3.Does the pluggable cartridge design help maintenance?
Yes, each module is replaceable independently, which reduces maintenance cost and downtime.

4.What are the common applications of this SPD?
This SPD is ideal for three-phase distribution cabinets, industrial equipment panels, automation systems, and backup power systems.

5.Is LY1-D20M/3(S)+1 certified for global use?
Yes, it complies with IEC 61643-11:2011 / EN 61643-11:2022, and has CE and TUV certifications.

6.Does the product include a status indicator?
Yes, a visual indicator shows device health and protection status.