Item No.: LY1-12.5/1(S)

LY1-12.5/1(S)Pluggable Single-Pole SPD

Description：

Classl·Classll·Type 1.Type 2
Location of Use: Main Distribution Boards
Mode of Protection: L-PE, N-PE
Surge Ratings: lim, = up to 12.5 kA (10/350 μs)l,= up to 20 kA (8 /20 μs)
IEC/EN/UL Category: Class I+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 professional 50kA 1 pole AC surge protective device manufacturer, producing compact and reliable SPDs for single-phase 230V AC networks. As an experienced factory, we provide OEM, wholesale, and bulk buy services to electrical wholesalers and system integrators worldwide.

Built with a graphite (C) shell, rated IP65, and mounted on a 35mm DIN rail, it ensures convenient installation and high safety. Each unit is CE certified and backed by a 2-year warranty.

We also provide OEM design and bulk order services, making this SPD ideal for wholesalers who require reliable, cost-effective surge protection directly from the manufacturer.

Applicable scenarios / Application industries

The 50kA 1P SPD uses a high-quality MOV (ZnO) varistor, delivering fast surge response and long endurance. Its design is optimized for residential and light industrial applications, offering strong protection against transient overvoltage from power switching or lightning.

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 LY1-12.5/1(S)Pluggable Single-Pole SPD

1. What is the main advantage of the LY1-12.5/1(S) pluggable SPD?
It features a replaceable pluggable surge module, making maintenance fast and cost-effective without removing wiring from the base.

2. What protection components are used inside this SPD?
This model uses MOV components that deliver reliable clamping against AC transient overvoltage events.

3. What certification and standards does this SPD follow?
It is produced in accordance with IEC 61643-11:2011 and EN 61643-11:2022, and certified with CE and TUV.

4. What installation method does the LY1-12-51S support?
It uses 35 mm DIN-rail mounting, suitable for AC power distribution boxes and equipment cabinets.

5. Can the surge module be replaced in the field?
Yes, the pluggable design allows quick removal and replacement of the surge module without disconnecting the base wiring.

6. Is OEM and wholesale supply available?
Yes, we provide OEM/ODM, private labeling, and factory-direct bulk supply for distributors.

7. What type of applications is this SPD ideal for?
The single-pole design is suitable for AC single-phase loads, lighting circuits, small control panels, and equipment power inputs.