Thin-film resistors add powerful new options

The PCF Series now includes the new PCF-H high-power resistor, and the PCF-P passivated resistor designed to offer superior humidity performance.

In response to market demands for increased precision and stability, Welwyn Components has expanded its PCF Series of nichrome thin-film chip resistors.

The PCF Series - offering solutions to precision test and measurement and voltage regulation across industrial, military and medical monitoring equipment markets - now includes the new PCF-H high-power resistor, and the PCF-P passivated resistor designed to offer superior humidity performance.

The range now also offers additional chip sizes.

Key features of the enhanced PCF Series include the availability of all standard sizes from 0201 to 2512.

The PCF-H series achieves up to double the power previously achieved from sizes 0603 to 1206.

And the PCF-P series achieves load life stability to 0.05% and enhanced reliability in harsh or humid environments.

When constructing the PCF Series, a thin-film material is selectively deposited on an alumina substrate, together with metallic contacts at each end of the resistor.

The unadjusted resistors are heat treated to give the required temperature coefficient (TCR) and stability, and then a precisely controlled laser trim process adjusts the resistance value.

The PCF-P benefits from an impervious internal passivation layer applied in addition to the normal protective coating.

Welwyn Components Business Unit Director, Barry Peters, comments: "The PCF Series offers an extremely wide range of over 80,000 combinations of size, value and precision grade".

"It's ideal for complex design applications including test and measurement, industrial instrumentation, automotive and medical".

"This latest extension of the range demonstrates Welwyn's ongoing commitment to responding to market needs with innovative precision components".

Back to top