AC surge protective device LY1-12.5/4(S)PLUGGABLE MULTI-POLE SPD,
As a professional 50kA 4 pole AC surge protective device factory, we specialize in three-phase + neutral surge protection for industrial control systems. Our production line supports OEM, wholesale, and bulk buy cooperation with global partners.
This SPD protects L1, L2, L3, and N simultaneously, with a combined surge discharge capacity of 50kA per phase. Using MOV ZnO varistors and graphite C insulation, it offers excellent performance and heat dissipation.
We supply OEM SPDs in bulk and help customers develop customized designs for specific voltage levels. Partner with our factory to get reliable, durable surge protectors for industrial energy 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 | 10 kA | 10 kA |
| Maximum Discharge Current (8/20 μs) | Imax | 50 kA | 50 kA | 50 kA | 50 kA | 50 kA | 50 kA |
| Impulse Discharge Current (10/350 μs) | Iimp | 12.5 kA | 12.5 kA | 12.5 kA | 12.5 kA | 10 kA | 10 kA |
| Specific Energy | W/R | 39 kJ/Ω | 39 kJ/Ω | 39 kJ/Ω | 39 kJ/Ω | 25 kJ/Ω | 25 kJ/Ω |
| Charge | Q | 6.25 As | 6.25 As | 6.25 As | 6.25 As | 5 As | 5 As |
| Voltage Protection Level | Up | 0.7 kV | 1 kV | 1.5 kV | 1.6 kV | 1.8 kV | 2 kV |
| Response Time | tA | < 25 ns | |||||
| Back-Up Fuse (max) | 315 A / 250 A gG | ||||||
| Short-Circuit Current Rating (AC) | ISCCR | 25 kA / 50 kA | |||||
| TOV Withstand 5s | UT | 114 V | 180V | 335V | 335V | 335V | 580V |
| TOV 120min | UT | 114 V | 230V | 440V | 440V | 440V | 765V |
| mode | Withstand | Safe Fail | Safe Fail | Safe Fail | Safe Fail | Safe Fail | |
| UL Electrical | |||||||
| Maximum Continuous Operating Voltage (AC) | MCOV | 75 V | 150 V | 275 V | 320 V | 385 V | 440 V |
| Voltage Protection Rating | VPR | 300 V | 600 V | 900 V | 1200 V | 1350 V | 1500 V |
| Nominal Discharge Current (8/20 μs) | In | 20 kA | 20 kA | 20 kA | 20 kA | 20 kA | 20 kA |
| Short-Circuit Current Rating (AC) | SCCR | 100 kA | 200 kA | 150 kA | 150 kA | 150 kA | 200 kA |
| 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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