Tuesday, August 14, 2007

New HV Surge Resistors

It's often difficult to find high voltage resistors rated for surge applications. Arcs can occur inadvertently in many applications, thus, requiring surge limiting resistors. Other applications have designated periodic rapid discharges.


Stackpole Electronics has announced a significant expansion to their ASR and SPR series of axial leaded anti-surge resistors. The ASR series adds a ¼ watt body size to the current sizes of 1 watt, mini ½ watt, and mini ¼ watt sizes. The SPR series has significantly improved the maximum working voltage up to 2000 volts, the max. overload voltage up to 3000 volts, and the surge withstanding voltage up to 10KV. The ASR and SPR series are a power metal film technology and are really the same part. The SPR series is only for the 1 watt and mini ½ watt sizes and strictly the values from 1 Meg ohms to 12 Meg ohms that are UL 1676 recognized. The ASR series is available in resistance values down to 100 ohms and up to 33 Meg ohms and can withstand surges from 1 kV up to 10 kV depending on size and resistance value. Together they offer an excellent alternative for carbon composition and ceramic composition resistors for pulse power withstanding with low inductance. In fact, side by side testing shows the ASR/SPR series is superior to carbon comps for high voltage surges.

For more information about Stackpole products, contact Stackpole Electronics, Inc. at 919-850-9500 or email marketing@seielect.com.

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