MALVERN, PENNSYLVANIA - Vishay Intertechnology, Inc.
(NYSE: VSH) has extended its family of thick film power resistors with the introduction of 30-W, 50-W and 100-W
devices in industry-standard TO220 and TO247 packages. The resistors use a ceramic package design (with no metal
tab) for direct-mounting on heatsinks, and feature an exceptionally low inductance of less than 0.1 µH,
suiting them for use in power conversion and control applications in a wide variety of industries.
The new Vishay Sfernice devices are available in a wide range of resistance values, from
0.010 Ω to 550 kΩ for the LTO 30 and LTO 50 families, and from 0.015 Ω to 1 MΩ for the LTO
100. All of the devices have a temperature coefficient of 150 ppm/ °C for values above 0.5 Ω. Their
compact, low-profile, direct-mounting package design improves heat dissipation and reduces space on printed circuit
The LTO resistors are designed for use in pulse-loading applications, as snubber or bleeder
resistors, and in a variety of other high-power equipment such as uninterruptible power supplies (UPS), power
conversion for traction and industrial drives, and in medical, automotive, and industrial control environments. The
resistors use an optimized process of printed thick film technology on an alumina substrate to achieve tolerances as
low as ± 1 %, and up to ± 10 %.
of the resistors are compatible with tin/lead (Sn/Pb) and lead (Pb)-free soldering processes, allowing use by all
assemblers transitioning to lead (Pb)-free processes to meet incoming legislation and voluntary environmental
manufacturing codes. In addition, all devices comply with EU directives on vehicle end of life, including 2000/53/EC
End of Vehicle Life Directive (ELV) and 2000/53/EC Annex II to End of Vehicle Life Directive (ELV II). All devices
also meet 2002/95/EC Restriction of the use of Hazardous Substances Directive (RoHS) and 2002/96/EC Waste Electrical
and Electronic Equipment Directive (WEEE).