Item No.: LY1-12.5/2(S)

LY1-12.5/2(S)PLUGGABLE SINGLE-POLE SPD

Description：

Classl·Classl·Type 1.Type 2
Location of Use: Main Distribution Boards
Mode of Protection: L-PE, N-PE
Surge Ratings: limp= up to 12.5 kA (10/350 μs)
I= up to 20 kA (8 /20 μs)
IEC/EN/UL Category: Class l+ll /Type 1+2
Protective Elements: High Energy MOV
Housing: Pluggable Design
Compliance:lEC 61643-11:2011
EN 61643-11:2012
UL 1449 4th Edition

We are a trusted 50kA 2 pole AC surge protective device supplier and factory, specializing in AC L+N protection for residential and commercial power systems. Our factory offers OEM, wholesale, and in bulk supply for global distributors.

The housing uses graphite (C) material for superior heat resistance, with IP65 waterproofing for outdoor use. Installation is quick with DIN-rail mounting, and every unit comes with CE certification and a 2-year warranty.

We support OEM customization and deliver SPDs in bulk, providing high-quality surge protection devices from a professional manufacturer trusted by global brands.

Applicable scenarios / Application industries

This SPD integrates MOV ZnO varistors with thermal disconnectors, ensuring consistent performance under repeated surges. Suitable for solar inverter input, combiner boxes, or AC distribution panels, it provides 50kA per line discharge capability.

Electrical Characteristics
SPD type 1+2+3
Network		230/400 V 3-phase+N
AC system TT-TNS
Nominal line voltage	Un	230/400 Vac
Max. AC operating voltage Uc 275 Vac
Temporary Over Voltage (TOV) Charasteristics – 5 sec. Without disconnection	UT	335 Vac withstand
Temporary Over Voltage (TOV) Charasteristics – 120 mn Without disconnection or with safety disconnection
Temporary Over Voltage N/PE (TOV HT) Without disconnection or with safety disconnection	UT	1.2 kV/300A/200 ms withstand
Residual Current Leakage current to Ground Ipe None
Follow current	If	None
Nominal discharge current 15 x 8/20 µs impulses In 20 kA
Max. discharge current max. withstand @ 8/20 µs by pole	Imax	50 kA
Impulse current by pole max. withstand 10/350µs by pole Iimp 12.5 kA
Total lightning currentmax. total withstand @ 10/350µs	Itotal	50 kA
Withstand on Combination waveform IEC 61643-11 Class III test: 1.2/50µs – 8/20µs Uoc 6 kV
Withstand on overvoltages IEEE C62.41.1		20 kV
Specific energy by pole max. withstand 10/350 µs W/R 40 kJ/ohm
Connection mode(s)		L/N and N/PE
Protection mode(s) Common/Differential mode
Protection level L/N @ In (8/20µs)	Up L/N	1.5 kV
Protection level L/PE @ In (8/20µs) Up L/PE 1.5 kV
Residual voltage L/N at 5 kA @ 5 kA (8/20µs)	Up-5kA	0.7 kV
Mechanical Characteristics
Technology		VG Technology (MOV+GSG)
SPD configuration		3-phase+Neutral
Connection to Network		By 40mm busbar and wire for PE: 6-35mm² (50mm²)
Format		Plug-in modular box
Mounting		40 mm busbar systems
Housing material		Thermoplastic UL94 V-0
Operating temperature	Tu	-40/+85°C
Outdoor application		IP20
Failsafe modem		No
Disconnection indicator		Disconnection from AC network
Remote signaling of disconnection		1 mechanical indicator by pole
Dimensions		Yes
Weight		See diagram
Disconnectors		0.7401 kg
Thermal disconnector		Internal
Installation ground fault breaker		Type ‘S’ or delayed
Fuses		max. 315 A (gL/gG)
Standards
Standards compliance		IEC 61643-11 / EN 61643-11 / UL1449 4ed.

■ Internal Configuration

■ Dimensions & Packaging

■ Connection Diagram

FAQ for LY1-12.5/2(S)PLUGGABLE SINGLE-POLE SPD

1. What makes the LY1-12.5/2(S) different from other pluggable SPDs?
The LY1-12.5/2(S) is designed with an enhanced MOV protection module and improved thermal disconnection mechanism, providing stable AC surge suppression for sensitive equipment.

2. Is the surge module replaceable?
Yes, the pluggable cartridge can be removed and replaced easily without rewiring the base, reducing maintenance time and cost.

3. What standards does this SPD follow?
It is produced according to IEC 61643-11:2011 / EN 61643-11:2022, and certified with CE and TUV for global compliance.

4. Where can this single-pole SPD be used?
Common applications include residential AC circuits, commercial distribution boxes, office equipment panels, and lighting systems.

5. What internal surge components are used?
The LY1-12.5/2(S) uses MOV (ZnO) varistors, providing quick clamping and strong surge endurance.

6. Does your factory offer OEM/ODM service for this model?
Yes, we can provide OEM/ODM customization, logo printing, and wholesale bulk supply for distributors.

7. What mounting method is used?
It mounts onto 35 mm DIN rails, compatible with standard AC distribution boxes.