Compact & efficient DIN rail power supplies

The DRB series is for low power applications that require low cost, basic functionality, while the DRF series is for medium power applications that require advanced control features.

DRB series

Designed to support the growing trend for simple and economic DIN power solutions in industrial, building automation and process control applications, the DRB series combines low cost and extremely compact dimensions with industry leading efficiency of up to 91%. No load power consumption is between <0.3W and <0.5W, depending on the model type.

The supplies operate from a universal input of 85~264Vac and have EN61000-3-2 compliance, enabling worldwide use; moreover, they can withstand voltage of 300Vac surge for 5 seconds. The DRB series is available with 4 output power levels ranging from 15 – 100W and nominal output voltages of 5V, 12-15V, 24V or 48Vdc.

The supplies can operate at full load over a wide temperature range of -10 to +55°C (+70°C for 15W model). Typical ripple and noise is below 40mV and a green LED indicates DC OK. Other features include over current and over voltage protection, and a hold-up time of up to 20 ms at 100Vac input voltage, full load.

The smallest model measures just 18mm x 75mm x 90mm (DRB15-24-1); all DRB 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 onto the rail.

DRF series

Operating from a universal input of 85 to 265Vac (47-63Hz) with active power factor correction to ensure EN61000-3-2 compliance, the convection-cooled DRF series meet demands for a wide range of applications, including those found in industrial equipment, building automation and process control.

"A premium medium power family, the DRF series combines careful thermal design and excellent efficiency,” says Martin Southam, Director of Marketing, TDK-Lambda EMEA. "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.

The DRB and DRF series will be amongst the products highlight by TDK-Lambda at the Design Engineering Show on Stand K35