Ruggedized axial-leaded aluminum electrolytic capacitor for demanding high-performance operating conditions

14-06-2017 | Cornell Dubilier | Passives

Cornell Dubilier Electronics has announced a new line of axial-lead aluminum electrolytic capacitors, for applications demanding very high-performance under all operating conditions. The HHT is the only axial-lead electrolytic featuring a glass-to-metal seal to prevent dry-out of the capacitor electrolyte. Shelf life is an extraordinary 10 years and operational rated life is 2,000 hours at rated voltage and +175C. At 150C and full-rated voltage, HHT capacitors outperform competitive technologies in a 5,000 hour test with ripple currents of up to 10Arms. This level of performance makes the HHT an excellent match for high-stress applications in defence, aerospace, down-hole and off-road transportation applications. Nine values are offered, from 470µF to 4,700µF, with ratings from 16VDC to 40VDC.

The series is the only aluminum electrolytic capacitor available in the market with +175C performance. This is usually the domain of the considerably more expensive wet tantalum technology. The HHT’s glass-to-metal seal is the reason. Without the seal, high temperatures will cause conventional electrolytics to lose electrolyte over time. This causes a drop in capacitance and an increase in ESR. With capacitance stability at high temperature, low leakage current and very competitive ESR and ripple current specifications, these devices provide new options for mission-critical applications. Like other CDE capacitors, the series is subject to the industry’s most rigorous dynamic testing. The 20g vibration testing follows procedures outlined in MIL-STD-202, method 204.

HHT case diameter is a low-profile 20mm for all values, with length varying from 37mm to 53mm depending on values. The axial lead wires are a substantial 18AWG. They are RoHS compliant and free of conflict materials.

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