The CST7030 series of surface mount current sense transformers from Coilcraft measure just 5.2 X 7.0 mm (with a max height of 3.0 mm) and sense up to 20 Amps of current at frequencies between 10 kHz and 1 MHz. Typical applications include load current measurement and control in switching power supplies and overload/short-circuit protection.
Coilcraft’s CST7030 Series surface mount current sense transformers (Source: Coilcraft)
The devices are also qualified to AEC-Q200 Grade 1 (-40°C to +125°C) standards, suiting them for conventional vehicle and xEV (EV, HEV, FCEV) applications, such as current measurement in traction motors and battery management systems. They are also suited for 48 V vehicle systems.
The CST7030 Series is available with 5 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. Coilcraft also offers a high-isolation (1,500 Vdc) version with its CU8965-AL Series.
CST7030 Series current sense transformers feature RoHS compliant tin-silver, over tin, over nickel, over phosphor bronze terminations and have a maximum reflow temperature of 260°C.
