High density medium-power DIN rail power supplies

Martin Southam, Director of Marketing, TDK-Lambda EMEA, comments: “A premium medium power family, the DRF series combines careful thermal design and excellent efficiency. With an average active efficiency of over 87% and low standby power consumption (below 0.5W to 0.75W depending on the model), this series is perfect for customers working to Eco-Design guidelines and seeking compact high efficiency products.”

There are three 24Vdc models in the TDK-Lambda DRF family; the DRF120-24-1 (5A), DRF240-24-1 (10A) and DRF480-24-1 (20A). With a 150% peak power capability for 4 seconds and steady constant current characteristic, the DRF is ideal for range of challenging loads found in automation applications.

Achieving up to 94% efficiency, the DRF features an operating temperature range of -25 to +70°C, with full load operation between -25 and +60°C, derating to 75% load at up to +70°C. Control features include over voltage, over current and over temperature protection and remote on/off. The models also have series and parallel operation capability.

The slim design of the DRF series – with the DRF120-24-1 measuring only 36.5 x 123.4 x 115.4 mm – saves space on the DIN rail. The DRF240 and DRF480 are 49mm and 82mm wide respectively. All DRF models will mount on either a TS35/7.5 or TS35/15 DIN rail offering engineers a flexible option for the various applications. In addition, they have been rigorously tested for shock and vibration while mounted.

The TDK-Lambda DRF series is approved to UL508 safety standard for industrial control equipment and hold up meets SEMI F47 requirements at high line input (200V only). Further safety approvals include IEC/EN 60950-1 (2nd Ed.) and UL/CSA 60950-1. CE marked in accordance with the LV Directive, EMC Directive and RoHS Directive, the DIN rail power supplies meet EN55022 and CISPR22 Class B for conducted and radiated EMI, and include a five-year warranty.