AC surge protective device LY1-12.5/3(S)PLUGGABLE MULTI-POLE SPD,
We are a leading 50kA 3 pole AC surge protective device manufacturer, producing reliable protection devices for three-phase TN-S and TT power systems. As a specialized factory, we offer OEM, wholesale, and bulk buy solutions for worldwide customers.
Designed with graphite (C) materials and IP65 sealing, it’s durable and fire-resistant. The 35mm DIN rail design ensures easy maintenance and replacement.
We provide OEM-branded SPDs and supply in bulk at factory pricing. With CE certification and a 2-year warranty, this model offers reliable and affordable protection for three-phase equipment.
| ■ 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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