Acquired Electronics360

Aerospace

Long Life in Harsh Conditions

07 July 2017

Designed to endure the rigors of extreme industrial and aerospace applications, a new series of ruggedized axial-lead electrolytic capacitors is now available from distributor New Yorker Electronics. The Cornell Dubilier Electronics HHT Series offers a 10-year shelf life, and is built for high performance under all operating conditions.

The company says that at 150°C and full-rated voltage, the series can outperform competitive technologies in a 5,000-hour test with ripple currents of up to 10 Arms. At rated voltage and at 175°C, operational rated life is 2,000 hours.

The 175°C performance is usually available only in wet tantalum technology, which is considerably more expensive. According to New Yorker Electronics, the HHT Series is the only axial-lead electrolytic featuring a glass-to-metal seal to prevent dry-out of the capacitor electrolyte – and it’s the seal that makes the difference. Without it, high temperatures will cause conventional electrolytics to lose electrolyte over time, causing a drop in capacitance and an increase in ESR. Thanks to capacitance stability at high temperature, low-leakage current and competitive ESR and ripple current specifications, these devices offer new options for mission-critical applications.

Nine values are offered, from 470µF to 4,700µF, with ratings from 16Vdc to 40Vdc. Case diameter is a low-profile 20mm for all values, with length varying from 37 to 53mm. The axial lead wires are 18 AWG, RoHS compliant and free of conflict materials. The series is put through 20g vibration testing, following procedures outlined in MIL-STD-202, method 204.

Features and Benefits

• Only aluminum electrolytic on the market with 175°C performance
• Glass-to-metal seal prevents normal dry-out of the capacitor electrolytic
• 10-year shelf life; operational rated life is 2,000 hours at 175°C rated voltage
• Low-profile case
• High capacitance retention at -40°C
• Comes in 9 values from 470µF to 4,700µF

Applications

• Downhole drilling and fracking
• Military and aerospace
• Extreme off-highway industrial/transporting



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