Passives

Thin film chip fuse protects voltage sensing circuits

19th August 2021
Mick Elliott

A very fast-acting thin film chip fuse aimed at automotive applications has been introduced by Vishay.

The Vishay Beyschlag MFU 0603 AT is AEC-Q200 qualified and features current ratings from 0.5 A to 5.0 A.

The device will be used in electric (EV) and hybrid electric (HEV) vehicles, where it will provide protection for voltage sensing circuits in battery management systems, in addition to circuit protection for small loads.

For these applications, the fuse's highly controlled thin film manufacturing process guarantees an outstanding stability of fusing characteristics.

Offering a robust design, the MFU 0603 AT consists of a homogeneous metal alloy film deposited on a high grade ceramic substrate, with fuse elements covered by a protective coating designed for electrical, mechanical, and climatic protection.

The device offers advanced sulphur resistance in accordance with ASTM B 809, and it withstands 85 °C / 85 % R.H. for 1000 h biased humidity testing and testing for thermal shock.

Offered in the 0603 case size, the fuse features a rated voltage of up to 63 V, breakdown capacity of 50 A, and operating temperature range of -55 °C to +125 °C.

RoHS-compliant, halogen-free, and Vishay Green, the fuse is suitable for processing on automatic SMD assembly systems and automatic soldering using wave, reflow, or vapour phase.

Samples and production quantities of the MFU 0603-FF AT are available now, with lead times of 10 to 14 weeks.

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