Compact shunt resistors enable surge-proof measurements

With a wide temperature range from –65 to +170°C and AEC-Q200 qualification, the EBW5216 series is ideal for a spectrum of industrial and energy management applications, including welding power supplies, motor drives, battery management, energy metering, and process control.

Building on TT’s expertise in current sense resistors engineered to meet demanding accuracy targets, the EBW5216 family is a compact complement to TT’s EBW8518 and is busbar-mounted in a 5216 size.

EBW5216 is an electron-beam welded resistance element sandwiched between large copper terminals with optional tin plating. The series offers values of 50 and 100µΩ at down to 1% tolerance, 150ppm/°C TCR (measurement), 20ppm/°C TCR (alloy), and <1µV/°C thermal EMF. The shunt resistor’s ultra-low ohmic values reduce power loss and its low self-heating reduces equipment temperature and improves reliability.

“The electron-beam welded shunt EBW5216 with its 4-terminal contacts is the latest addition to TT’s growing portfolio of current sense resistors with AEC-Q200 approval. Its low measurement error frees up the designer’s error budget – and its compact footprint enables our customers to achieve accurate and surge-proof current measurement in busbar-connected assemblies,” said Nick Atkinson, Senior Product Line Manager, TT Electronics.

The EBW5216 series offers a robust shunt with the option of pressed pin terminals at voltage sense points, permitting through-hole attachment to a printed circuit board (PCB). The optional through-hole voltage sense terminations optimise accuracy, allowing complete separation of the current path and voltage sensing.

Featuring a short-term overload rating of 75W for 5s and up to 120J surge capacity, this robust solution is designed to withstand high inrush or switching surges.