High-current photorelays achieve UL 508 for factory automation 

Certification to UL 508 for factory automation allows designers using Toshiba Electronics Europe’s photorelays to achieve UL approval for control equipment

The nine high-current photorelays in the series include low on-state resistance MOSFETs based upon Toshiba’s U-MOS VIII process that ensure high performance in a range of applications.

The TLP3556A, TLP3558A, TLP241A, TLP3543A, TLP3545A, TLP3546A, TLP3547, TLP3548 and TLP3549 are now fully certified to UL 508 and UL1577. These approvals allow designers to meet the UL safety requirements for control equipment, including the thermal design margin.

The devices can be used in industrial applications such as PLCs, interfaces and sensor control as well as building automation (heating and ventilation / heating ventilation air conditioning or HVAC). They can also be used for relay replacement in DC systems to 125V and AC systems to 400V, replacing 1-Form-A and other mechanical relays.

The photorelays are more robust than their mechanical counterparts and do not require a driver, so space, weight and cost savings can also be realised.

The nine photorelays are housed in DIP packages with four, six or eight pins (DIP4, DIP6 or DIP8). All packages have a surface mount option available, including wide-body versions. Devices are able to operate across the industrial temperature range of -40 to +85 degrees C ambient, while the case temperature can safely rise to 105 degrees C.

The photorelays can handle off-state output terminal voltages (Voff) as high as 600V. They also offer on-state resistances (Ron) as low as 22mOhm and can handle continuous currents (Ion) up to 5A. The pulsed current (IONP) is three times this level.

All nine photorelays in the range are available in production quantities.


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