domov
domov natisni zemljevid strani e-pošta kolofon
Varistors With Thermal Disconnection / ET Series / ET40 Series

ET40 Series

 The ET40 types are heavy-duty metal oxide varistors with a thermal cut-off device. This device protects ET types from varistor failure in the event of abnormal overvoltage. The ET40 Series offers excellent surge protection with extra safety for various electronic equipment such as: traffic and raillway signal systems, communication equipment, waterworks, automatic control devices for power distribution, oil drilling and mining equipment (dredgers, cranes, etc.). The advantages of the ET40 Series are: terminals constructed for PCB mounting, a thermal cut-off device which protects ET40 types from varistor failure in event of abnormal overvoltage or varistor thermal runaway. Remote signalisation can be achieved by external circuitry.

Catalogue ET40		ET40 photo


Wide Operating Voltage Range VRMS75 V to 440 V
High Max. Discharge Current Capability Imax (8/20 µs)40000 A
- rigid terminals for secure wire contact
- case design provides complete electrical isolation of disc assembly
- thermal cut-off device
- flame retardant housing (UL 94 V-0)
- flame retardant filling (UL 94 V-0)
Tested in accordance withIEC 61643-1IEC 61051-1 and UL 1449
Category IEC/VDEIII/D
Operating Temperature- 40 ... + 85°C
Mountingon printed circuit board (PCB)
Response Time< 25 ns

ET40 designation
Varsi d.o.o
Stegne 35
1521 Ljubljana
Slovenia
 tel: +386 1 500 31 80
fax: +386 1 500 32 37
e-mail: info@varsi.si

technical contact
technical@varsi.si
tehnical support