TT touts first lead-free thick-film high-voltage resistors

By Heather Hamilton, contributing writer

TT Electronics is claiming the first fully lead (Pb)-free thick-film high-voltage chip resistors in the industry. The company said that the chip resistors future-proof medical and industrial equipment designs by eliminating their reliance on RoHS exemptions and meet growing demand for high-voltage sensing and protection in equipment such as power supplies, circuit breakers, and medical monitors.

The GHVC Green high-voltage chip resistors offer E24 and E96 resistance values from 25 kΩ to 100 MΩ in standard EIA 1206, 2010, and 2512 sizes, with a power rating of 0.3 W, 0.5 W, and 1.0 W, respectively. The chip resistors provide a DC or AC peak limiting element voltage up to 3,000 V for 2512 chips and up to 4,000-V overload.

Other specs include a 1.2/50-μs surge-voltage rating of 7 kV and an ambient operating temperature range of −55°C to 125°C. A temperature coefficient of ±100 ppm/°C and a voltage coefficient of −1.5 ppm/V provide consistent parameters over wide-ranging conditions, said the company.

The chip resistors can also be used in mining and chemical processing applications thanks to anti-sulphur terminations that pass ASTM-B-809 testing for reliability and stability in sulphurous environments.