T83-A90X

The EPCOS T83-A90X is a 3-electrode surge arrester, identified by ordering code B88069X8300B502. It is engineered to provide protection against transient overvoltages.

Key electrical characteristics include a nominal DC spark-over voltage of 90V with a ±20% tolerance. The device can handle impulse spark-over voltages of less than 400V at 100 V/µs and less than 450V at 1 kV/µs. For discharge current handling, it has a nominal impulse discharge current (8/20 µs wave) of 10 kA and a single impulse discharge current of 15 kA. It also supports a nominal alternating discharge current (50 Hz, 1 s) of 10 A and an alternating discharge current (50 Hz, 9 cycles) of 40 A.

Further electrical specifications include an insulation resistance greater than 1 GΩ at 50 V dc, a capacitance of less than 1.5 pF at 1 MHz, and a transverse delay time of less than 0.2 µs. The typical arc voltage is around 10V at 1A, with a glow to arc transition current of approximately 1A and a glow voltage of around 60V.

Mechanically, the surge arrester weighs approximately 2 grams. It operates and can be stored within a temperature range of -40°C to +90°C, adhering to climatic category 40/90/21 as per IEC 60068-1. The marking '90 YY O' indicates the nominal voltage, year of production, and non-radioactive status.