Robust DC Link Film CapacitorsAugust 27, 2019 by Paul Shepard
TDK Corporation has extended its portfolio of EPCOS film capacitors for dc link applications with the robust new B3277*M series. The new types are suitable for extreme environmental conditions – a fact that has been proven by means of a THB test (temperature, humidity, bias) at 85°C, 85% relative humidity with a rated voltage applied for 1000 hours.
The capacitors of the new series are designed for rated voltages of between 450Vdc and 1600Vdc and offer capacitance values of between 0.33µF and 120µF. The maximum operating temperature of these RoHS-compatible components is 105°C.
Depending on the voltage and capacitance, the lead spacings are 27.5mm, 37.5mm and 52.5mm, and a 2-pin or 4-pin version is available for each lead spacing. The service life of the self-healing capacitors is 50,000 hours at the rated voltage and an operating temperature of 85°C.
Typical applications include dc links of converters for photovoltaic plants, as well as frequency converters and power supplies for industrial applications. The series is qualified in accordance with AEC-Q200.
Main features and benefits
- Successful completion of THB tests at 85°C, 85% relative humidity and an applied rated voltage for 1000 hours.
- Wide voltage range from 450Vdc to 1600Vdc
- Wide capacitance range from 0.33µF to 120µF
- Qualified in accordance with AEC-Q200