DESCRIPTION
The STE0512 are designed by TVS device that is to protect sensitive  electronics from damage or latch -up due to ESD. They are designed for use in applications  where board space ia at a premium.
STE0512 will protect up to  two line s, and may be used on lines where the signal polarities swing above and below g round.

FEATURE
Transient protecti on for data lines to IEC 61000-4-2 (ESD) +/ -15kV (air), +/-8KV (contect) IEC 61000-4-4 (EFT) 40A (5/50ns)
Protects two I/O lines
Working voltage : 5V
Low leakage current
Low operating and clamping voltages