Passives

Filter capacitors handle harsh environments

23rd March 2021
Mick Elliott

The new ALH Series of AC Harmonic Filter Capacitors with 1,500 hour rating from Cornell Dubilier Electronics (CDE) are in stock at New Yorker Electronics.

This new CDE series is designed with the most advanced construction technology to meet the challenges of harsh environments.

The company claim the series offers 50 % greater life than competitive 85/85 THB-rated power film capacitors with designs that pass the rigours of automotive-grade electrical and mechanical testing. 

The temperature, humidity at bias (THB) test exposes parts to the harsh conditions of +85°C at 85% relative humidity with rated voltage applied. CDE’s testing has been validated for 1,500 hours while claiming its competitors validate their series for 1,000 hours under the same conditions.

This demanding test simulates the extremely harsh operating conditions encountered in many commercial and industrial inverter applications that can cause conventional film capacitors to fail early due to moisture penetration.

The ALH Series is optimized for AC harmonic filtering on the input and output of inverter circuits. Capacitance ranges from 0.22 to 50 μF at 160-450 Vac, 50/60Hz with high rms current ratings for handling higher-ordered harmonics. 

Self-healing, metallised polypropylene-film in a robust board-mount package meets the rigours of automotive AEC Q200 testing.

The solvent-resistant, box-style plastic case and resin-seal are both UL/cUL 94V-0 recognized for construction designs, with tin-plated copper RoHS compliant terminations.

Their construction makes these capacitors ideally suited for solar, wind, UPS, EV and other inverters applications that may be subjected to wide-ranging environmental conditions.

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