Our 100kA 4 pole AC surge protective device provides full protection for three-phase + neutral (4P) systems. It integrates graphite arc gap discharge chambers with MOV ZnO varistors, ensuring stable and high discharge capacity.
Encased in flame-retardant PVC/PA66/PBT housing, the device complies with IEC 61643-11:2011 / EN 61643-11:2022 and is approved with CE & TUV certifications.
We are a surge protection device factory and OEM/ODM manufacturer, supporting bulk orders, wholesale pricing, and in bulk supply.
Perfect for AC distribution panels, industrial equipment, residential surge boxes, and solar systems, this SPD features 35mm DIN rail mounting for fast installation and maintenance.
Item No.: LY1-B25/4(S)
LY1-B25/4(S) MONOBLOCK MULTI-POLE SPD
Description：
Classl·Class II·Type 1·Type 2
Location of Use: Main Distribution Boards
Network Systems: TN-S
Mode of Protection: L-PE /L’-PE, N-PE / N’-PE
Surge Ratings: limp= 25 kA (10/350 μs)
ln = 25 kA (8 /20 μs)
IEC/EN Category: Class 1+11 / Type 1+2
Protective Elements:High Energy MOV
Housing: Monoblock Design
Compliance: IEC 61643-11:2011
EN 61643-11:2012
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| ■ Technical Data | ||||||
| IEC Electrical | 150 | 275 | 320 | 385 | 440 | |
| Nominal AC Voltage (50/60Hz) | Uo/ Un | 120 V | 230 V | 230 V | 230 V | 400 V |
| Maximum Continuous Operating Voltage (AC) | Uc | 150 V | 275V | 320 V | 385 V | 440 V |
| Nominal Discharge Current (8/20 μs) | In | 25kA | ||||
| Maximum Discharge Current (8/20 μs) | Imax | 100kA | ||||
| Impulse Discharge Current (10/350 μs) | Iimp | 25kA | ||||
| Total Discharge Current (10/350μs) | Itotal | 100kA | ||||
| Specific Energy | W/R | 156 kJ / Ω | ||||
| Charge | Q | 12.5 As | ||||
| Voltage Protection Level | Up | 1 kV | 1.5 kV | 1.6 kV | 1.8 kV | 2 kV |
| Response Time | tA | < 25 ns | ||||
| Back-Up Fuse (max) | 315 A gL / gG | |||||
| Short-Circuit Current Rating (AC) | ISCCR | 50 kA | ||||
| TOV Withstand 5s | UT | 180V | 335V | 335V | 335V | 580V |
| TOV 120min | UT | 230V | 440V | 440V | 440V | 765V |
| Number of Ports | 1 | |||||
| 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) |
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| 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) |
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■ Internal Configuration
■ Dimensions & Packaging
■ Connection Diagram
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