Vishay Intertechnology, Inc. (NYSE: VSH) today introduced a new high precision thin film wraparound chip resistor for industrial, military, and aerospace applications. In addition to offering the widest resistance value range on the market, the Vishay Sfernice PEP delivers higher power ratings in smaller case sizes than competing devices, which enables miniaturization and increases reliability by reducing the mechanical stress on solder joints.
The resistor released today is available in four case sizes from 0402 to 1206 and features a high power rating to 1 W in the 1206 case size (without cooling under the PCB). The PEP offers a wide resistance range from 39 Ω to 900 kΩ, with tolerances down to ± 0.05 %, and operates over a broad temperature range of -55 °C to +155 °C. Combined with very low noise of < -35 dB, a low voltage coefficient of < 0.01 ppm/V, and load-life stability of ± 0.1 % typical for 2,000 hours at +70 °C, the device’s typical specifications exceed the requirements of MIL-PRF-55342G.
The PEP is optimized for precision applications requiring low noise and high stability over time and temperature. End products will include instrumentation, military and avionics guidance systems, automatic test equipment, industrial appliances, and operational amplifiers for test and measurement equipment.
RoHS-compliant, halogen-free, and Vishay Green, the device is sulfur-resistant per the ASTM B809-95 humid vapor test.
Device Specification Table:
| Case size | Resistance range (Ω) | Rated power (W) Pn¹ | Rated Power (W) Pd² | Limiting element voltage (V) |
| 0402 | 39 to 50 k | 0.125 | 0.063 | 50 |
| 0603 | 39 to 108 k | 0.320 | 0.125 | 75 |
| 0805 | 39 to 240 k | 0.500 | 0.200 | 150 |
| 1206 | 39 to 900 k | 0.660³ | 0.330 | 200 |
¹Pn = nominal power
²Pd = derated power intended to improve stability
³Pn = 1 W if device is mounted on an alumina board
Samples and production quantities of the PEP resistor are available now, with lead times of 16 weeks.