Product News: Electronic Components & Devices

Wirewound Resistors offer 12 kV surge withstanding capability.

Press Release Summary:

Wirewound Resistors offer 12 kV surge withstanding capability.

Feb 04, 2013 - Comprised of axial cemented wirewound resistors, Z300-C series limits in-rush currents during high voltage surges. Voltage surge withstand capabilities reach up to 12 kV per IEC 61000-4-5 (1.2 µsec/50 µsec), and power ratings range from 1–6 W at 40°C ambient and 0.9–5.4 W at 70°C. Along with resistance from 0.15 Ω to 10 kΩ, these RoHS-compliant devices feature resistance tolerances of ±5% and ±10%, TCR of ±200 ppm/K (±400 ppm/K below 1 Ω), non-flammable cement coatings, and ceramic cores.

Original Press Release

Vishay Intertechnology Releases Industry's First Axial Cemented Wirewound Resistors with High-Voltage Surge Withstanding Capability up to 12 kV

Press release date: Jan 28, 2013

MALVERN, Pa. – Vishay Intertechnology, Inc. (NYSE: VSH) today introduced a new series of axial cemented wirewound resistors that are the industry's first to offer a customized high-voltage surge withstanding capability up to 12 kV.

Designed to limit in-rush currents during high voltage surges, the Vishay Draloric devices are optimized for power supplies in electronic meters, industrial and home appliances, and electronic ballasts. For increased safety in overload conditions, the devices feature non-flammable cement coatings and high-grade ceramic cores.

The Z300-C series features a high-voltage surge withstand capability up to 12 kV as per IEC 61000-4-5 (1.2 µs/50 µs). The maximum allowed surge handling capacity depends on the resistor model and ohmic value.

The resistors provide a power rating from 1 W to 6 W at an ambient temperature of 40 °C and 0.9 W to 5.4 W at 70 °C. The devices offer resistance from 0.15 Ω to 10 kΩ (with other values available on request), resistance tolerances of ± 5 % and ± 10 %, and temperature coefficient (TCR) of ± 200 ppm/K (± 400 ppm/K for resistance values below 1 Ω).

Z300-C resistors are RoHS-compliant and comply with Vishay "Green" standards.
Device Specification Table:
Model Power rating P40 (W) Power rating P70 (W) Resistance Range (Ω)
Z301-C 1 0.9 0.30 to 2 k
ZDA0411-C 2 1.8 0.47 to 4.3 k
Z302-C 3 2.5 0.22 to 3.3 k
Z303-C 4 3.5 0.47 to 3.9 k
Z304-C 5 4.7 0.62 to 5.6 k
Z305-C 6 5.4 0.15 to 10 k

Samples and production quantities of the Z300-C series devices are available now, with lead times of eight to 10 weeks for larger orders. Pricing for U.S. delivery varies according to power rating and resistance value. As an example, distribution pricing for a 4 W, 1.5 kΩ device with 12 kV surge protection is $0.175 per piece in 50,000-piece quantities. Follow wirewound resistors from Vishay at

Vishay Intertechnology, Inc., a Fortune 1,000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay's product innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can be found on the Internet at