Item No.: LY1-C40/4(S)

LY1-C40/4(S) SURGE PROTECTION DEVICE

Description：

1)2) and 3)4) are same product with different type name
With “+1″ have MOV and GDT, protection mode (TN-S, TT),
Without “+1″ only have MOV, protection mode (TN-S,TN-C)
With “S”: have floating remote signalling contact
Without “S”: have no floating remote signalling contact
Device length is 90mm, height is 81mm, width from 1P to 4P (18, 36, 54, 72)mm

Our 40kA 4 pole AC surge protective device provides complete protection for three-phase + neutral (4P) systems.
Utilizing MOV ZnO varistors, it ensures reliable clamping voltage control and high surge endurance.
The robust housing, built from PVC/PA66/PBT, meets industrial flame-retardant and insulation standards.
Compliant with IEC 61643-11:2011 / EN 61643-11:2022, and approved by CE & TUV.
We are a trusted manufacturer, supplier, and factory, offering OEM/ODM customization, wholesale, and in bulk orders.

Applicable scenarios / Application industries

The device supports 35mm DIN rail mounting, ideal for industrial power cabinets, solar protection panels, and combiner 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	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-C40/4(S) SURGE PROTECTION DEVICE

1.What type of protection does the LY1-C40/4(S) provide?
The LY1-C40/4(S) is a robust AC surge protection device designed for Type 2 surge protection in low-voltage AC systems, using high-performance MOV modules.

2.Is this product suitable for residential and commercial systems?
Yes. Its versatile design makes it suitable for homes, commercial power panels, office buildings, and general electrical distribution environments.

3.Which compliance standards does the LY1-C40 meet?
The device is manufactured following IEC 61643-11:2011 / EN 61643-11:2022, and is certified with CE & TUV, ensuring safe global deployment.

4.What core components are used in this SPD?
It uses MOV surge elements with high surge endurance, designed for environments with frequent transient overvoltage.

5.Can this SPD be mounted on a DIN rail?
Yes. The LY1-C40/4(S) is compatible with standard 35 mm DIN rails, making installation fast and convenient.

6.What applications is the LY1-C40/4(S) best suited for?
It is commonly used in distribution boards, AC mains in commercial facilities, industrial control systems, and sensitive equipment protection.

7.Do you support OEM/ODM manufacturing for this model?
Yes. As a professional surge protective device factory, we provide OEM/ODM service, bulk manufacturing, custom labeling, and customized electrical parameters.