Toshiba Electronics Europe has announced two miniature photocouplers that are dedicated for office equipment, home appliances, solid state relays and other applications demanding high impulse noise immunity. The TLP3782 and TLP378 zero-crossing devices provide minimum isolation voltages of 5000Vrms between sensitive logic and AC currents. Each device is rated for typical impulse noise durability of 1500V. The photocouplers consist of a GaAlAs LED that is optically coupled to a triac output photocoupler and can be used to control current in both forward and reverse directions. Minimum peak off-state voltage is rated at 800V.

Maximum trigger LED currents for the TLP3782(S) and TLP3783(S) are 10mA and 5mA respectively. Input forward current is rated at 30mA, and maximum on-state current is 100mA (at 25ºC). The two devices are housed in a compact 6-pin DIP package measuring 7.1mm x 6.4mm x 3.6mm and are designed to meet UL and reinforced insulation class VDE international safety standards. Each photocoupler will operate at temperatures ranging from -40ºC to 100ºC.