The chip resistors are free of lead and lead compounds, enabling RoHS compliance of industrial and medical electronics

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.