1-Form-B photo relay offers 1.2A on-state current rating

Offered as an alternative to conventional mechanical relays, the TLP4590A is the latest photo relay from Toshiba Electronics Europe. It is supplied in a compact DIP6 package.

This 1-Form-B (normally closed) photo relay has an on-state current rating of 1.2A, which represents a 140 per cent improvement on the company’s previous-generation TLP4176A device. It has a 60V off-state output terminal voltage rating and enhanced sensitivity due to the low trigger LED current of 2mA (maximum) exhibited.

Applications for the photo relay includes those relating to building automation – including heating, ventilation, air conditioning and security systems, as well as fire alarms. It can also be used in industrial equipment, such as programmable logic controllers (PLCs), I/O interfaces and sensor control hardware. The 5,000V rms (minimum) isolation voltage makes the TLP4590A suitable for use where elevated levels of insulation performance are required. Operating range is -40 to +110 degrees C, enabling the photo relay to be used in harsh environments.    

Toshiba Electronics Europe is the European electronic components business of Toshiba Electronic Devices and Storage. TEE offers European consumers and businesses a variety of innovative hard disk drive (HDD) products, semiconductors for automotive, industrial, IoT, motion control, telecomms, networking, consumer and white goods. The company’s broad portfolio encompasses integrated wireless ICs, power semiconductors, microcontrollers, optical semiconductors, ASSPs and discrete devices ranging from diodes to logic ICs.

TEE has headquarters in Düsseldorf, Germany, with branch offices in France, Italy, Spain, Sweden and the United Kingdom providing design, manufacturing, marketing and sales.


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