New Inrush Current Limiter Protects Avionics and Military Power Systems

22nd September 2011
Source: VPT
Posted By : ES Admin
New Inrush Current Limiter Protects Avionics and Military Power Systems
VPT Inc., announced that it is continuing to expand its product line with a new power protection module, the DVCL Inrush Current Limiter. The DVCL controls potentially damaging inrush current drawn by DC-DC converters, EMI filters, and discrete capacitors during startup. With a power capacity of 200W, users can protect multiple downstream VPT DC-DC converters using a single, lightweight DVCL module.
“We’re continuing to expand our line of standard, off-the-shelf power building blocks for avionics and military power systems,” said Michael J. Bosmann, Sr. Vice President of VPT, Inc. “This new front end module works in concert with our DC-DC power converters, EMI filters, and other components to provide engineers with a true ‘one-stop-shopping’ experience when building a power system. Engineers building commercial aircraft systems, military aircraft systems, or other critical reliability applications can be assured of the most rugged performance and reliability from this inrush current limiter.”

About Inrush Current and the DVCL Inrush Current Limiter
Inrush current is the spike of current drawn by a power supply when it is turned on. Large inrush currents might be governed by a system level specification. High spike currents can create electromagnetic interference in adjacent circuitry, trip an upstream circuit breaker, or overwhelm the over-current protection of a solid state power controller.

The DVCL Inrush Current Limiter functions by limiting the rate of rise of its output voltage. It will also control the inrush current of discrete input capacitors.

Specific features of this new module include:

Smallest (1.075 in2), lightest weight (16g) hermetic inrush current limiter available
High 99% efficiency
Hermetic package ensures full performance over -55°C to +125°C military temperature range
Up to 200W output power available to power multiple downstream DC-DC converters and point of load DC-DC converters
Extreme reliability
Industry’s widest input voltage range of 11 to 50V per MIL-STD-704
High input transient voltage – 80V for 1 second
Available compliant to MIL-PRF-38534, Class H
Defense Logistics Agency Standard Microcircuit Drawing (SMD) pending

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