Item No.: LY1-C40/3(S)

Key Specifications：

Classll·Type 2·Type 1CA
Location of Use: Sub-Distribution Boards
Mode of Protection: L-PE, N-PE
Surge Ratings: In = 20 kA (8/20 μs)
IEC/EN/UL Category: Class ll /Type 2 /Type 1CA
Protective Elements: High Energy MOV
Housing: Pluggable Design
Compliance: lEC 61643-11:2011
EN 61643-11:2012

The 40kA 3 pole AC surge protective device is engineered for three-phase AC networks, combining fast response and high discharge capacity.
With advanced MOV ZnO varistors, it provides efficient protection against voltage transients and lightning surges.
Its enclosure is made of PVC/PA66/PBT materials for strength, insulation, and flame resistance.
Manufactured under IEC 61643-11:2011 / EN 61643-11:2022, and certified by CE & TUV.
As a professional OEM/ODM surge protection manufacturer and factory, we offer wholesale and bulk supply options.

Applicable scenarios / Application industries

This SPD installs easily via 35mm DIN rail, suitable for solar combiner boxes, control panels, and AC power systems.

■ 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	20 kA	20 kA
Maximum Discharge Current (8/20 μs)	Imax	40 kA	40 kA	40 kA	40 kA	40 kA	40 kA
Voltage Protection Level	Up	0.4 kV	1 kV	11.5 kV	1.6 kV	1.8 kV	2 kV
Impulse Current (10/350μs) Iimp (L-N)		7kA
Response Time	tA	< 25 ns
Back-Up Fuse (max)		125 A gL / gG
Short-Circuit Current Rating (AC)	ISCCR	25kA/50kA
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-C40/3(S)PLUGGABLE MULTI-POLE SPD

1.What is the main purpose of the LY1-C40/3(S) multi-pole design?
Its configuration supports 2P/3P/4P AC systems, offering coordinated protection for three-phase and multi-phase electrical networks.

2.What surge suppression technology is used?
This model is based on MOV technology, providing rapid voltage limiting during surge events and maintaining system stability.

3.Is the LY1-C40/3(S) compliant with global surge protection standards?
Yes. It meets IEC 61643-11:2011 / EN 61643-11:2022 and carries CE + TUV certifications.

4.Where is this multi-pole SPD commonly installed?
It is widely used in industrial control cabinets, factory distribution boards, commercial building power systems, and machinery mains.

5.Does the pluggable module design help in maintenance?
Yes, each protection module can be replaced independently, allowing quick service without rewiring.

6.What is the casing material?
The enclosure uses PA66/PBT flame-retardant high-strength polymer, suitable for demanding electrical environments.

7.Do you offer OEM/ODM production for multi-pole SPDs?
Yes. We are a factory specializing in OEM/ODM branding, bulk orders, customer-specific parameters, and distributor cooperation.