Ultra-small 4-Form-A voltage driven photorelays

Ultra-small 4-Form-A voltage driven photorelays

New Products |
By Jean-Pierre Joosting

Toshiba Electronics Europe GmbH has launched three new 4-Form-A voltage driven photorelays with one of the smallest mounting areas in the industry.

The new devices are suited to a wide range of applications including measuring instruments such as oscilloscopes and data loggers as well as burn-in equipment. They are also ideal for use in semiconductor test equipment (probe cards and test heads for memories, system-on-chip (SoC) and LSI) where there is a need to mount multiple relays on circuit boards with space constraints.

The new products denoted TLP3407SRA4, TLP3412SRHA4 and TLP3475SRHA4 are Toshiba’s first-ever four-circuit, 4-Form-A relays. They are housed in a tiny, newly developed S-VSON16T package measuring 2.0- x 6.25- x 1.3-mm and requiring a PCB mounting area of just 12.5 mm2. The area is approximately 14% less compared with the mounting area of four 1-channel relays.

By incorporating input resistors, the new products are able to be voltage driven without any need for external resistors in 3.3-V or 5-V systems. This further reduces space requirements on circuit boards, allowing more photorelays to be mounted.

All devices are supplied in normally open (1-Form-A / NO) configuration with an off-state voltage of 60 V and offer 300 Vrms (minimum) of isolation. The TLP3412SRHA4 and TLP3475SRHA4 offer an ON-state current of 250 mA with a typical ON-state resistance of just 1 Ω while the corresponding figures for the TLP3407SRA4 are 600 mA and 0.2 Ω.

With typical turn-on and turn-off times of just 220 µs (tON) and 50 µs (tOFF), the TLP3412SRHA4 and TLP3475SRHA4 are ideally suited to use in high-speed testers and other similar applications.

The operating temperature (Topr) range for all devices is -40ºC to +125ºC, allowing use in high temperature applications while ensuring thermal design margins are easily met or exceeded.

Volume shipments of the new devices start today.

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