Vishay Intertechnology, Inc. has introduced a surface-mount series of high-precision, high-stability metal film resistors in the 2012 and 4527 case sizes. The PSF resistors feature extremely low temperature coefficients down to ± 5 ppm/°C and tight tolerances to 0.01%

Measuring 0.200 in. by 0.125 in. [5.08 mm by 3.18 mm] with a 0.096 in. [2.44 mm] profile, the PSF2012 offers a 0.125 W power rating and 200 V working voltage.

The PSF4527 measures 0.455 in. by 0.275 in. [11.56 mm by 6.98 mm] with a 0.167 in. [4.24 mm] profile and features a 0.25 W power rating and 300 V working voltage.

The device offers compliant wraparound terminations that eliminate the risk of solder fillet cracking due to differences in coefficient of thermal expansion (CTE), as well as a rugged molded encapsulation to optimize performance in harsh environments. The resistors operate over a temperature range of –55°C to +150°C.

Key features:
. Extremely low temperature coefficient of resistance
. Molded encapsulation
. Wraparound compliant terminations eliminate the risk of solder fillet cracking
. Solderable terminations
. Excellent stability at different environmental conditions
. Compliant to RoHS directive 2002/95/EC

Device specification table:

Applications:
. Precision test and measurement systems
. Military
. Aerospace
. Industrial equipment
. Instrumentation