Surface mount current sense transformers save space, says TDK
Nine compact Epcos surface mount current sense transformers are designed for measuring currents of up to 7A at frequencies between 50kHz and 1MHz.
The B82801A1 series offers transformation ratios from 1:20 to 1:150 between the primary and secondary winding. The maximum DC resistance of the primary winding for all types is only 2.5 milliOhm. According to TDK, reproducibility and reliability are ensured by highly automated production using laser welding technology.
The RoHS-compatible components have a small footprint of only 4.5 x 4.85mm and a height of 3.5mm. The insulating coating of the ferrite cores allows for space-saving installation on tightly populated boards, adds TDK. The test voltage of the windings is 500V.
Intended applications of the B82801A1 series of current sense transformers include overload detection and detection of load shedding in switch mode power supplies.
TDK is an electronics company based in Tokyo, Japan. It was established in 1935 to commercialise ferrite, a key material in electronic and magnetic products. Its portfolio features passive components such as ceramic, aluminium electrolytic and film capacitors, as well as magnetics, high-frequency and piezo and protection devices. The product spectrum also includes sensors and sensor systems such as temperature and pressure, magnetic, and MEMS sensors. TDK also provides power supplies and energy devices and magnetic heads.
Its brand names are TDK, Epcos, InvenSense, Micronas, Tronics and TDK-Lambda. TDK focuses on demanding markets in the areas of information and communication technology and automotive, industrial and consumer electronics. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America.
