Coilcraft has introduced the CST7030 Series of surface-mount current-sense transformers which measure just 5.2mm x 7mm (with a max height of 3mm) and sense up to 20A of current at frequencies between 10kHz and 1MHz. Typical applications include load current measurement and control in switching power supplies and overload / short-circuit protection.
The devices are also qualified to AEC-Q200 Grade 1 (-40C to +125C) standards, making them ideal for conventional vehicle and xEV (EV, HEV, FCEV) applications such as current measurement in traction motors and battery management systems. They are also well suited for use in 48V vehicle systems.
The CST7030 Series is available with five turns ratios (primary-to-secondary) ranging from 1:20 to 1:150. It offers very low primary DC resistance (0.0015 Ohms) and 500 Vrms, one minute isolation (hipot) between windings.
CST7030 Series current sense transformers feature RoHS compliant tin-silver, over tin, over nickel, over phos bronze terminations and have a maximum reflow temperature of 260C. Coilcraft also offers a high-isolation (1,500VDC) version - the CU8965-AL Series.