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Electrolytic Caps Handle High Ripple Current

28 February 2017

Vishay Intertechnology, Inc. has introduced a series of 400 V and 450 V snap-in, four-terminal aluminum electrolytic capacitors with improved ripple current capability at an ambient temperature of 105° C in 15 large case sizes. Designed for power supplies and industrial and home appliance inverters, the Vishay BC components 299 PHL-4TSI series reduces component counts and lowers costs, while increasing mechanical stability and end-product lifetimes.

299 PHL-4TSI electrolytic capacitors. Source: Vishay. 299 PHL-4TSI electrolytic capacitors. Source: Vishay. Featuring a cylindrical aluminum case with pressure relief, insulated with a blue sleeve, the devices released today offer high ripple current from 2.45 A to 6.77 A, allowing designers to utilize fewer components to meet the requirements of applications connected to a three-phase mains. The 299 PHL-4TSI capacitors have a high 105° C temperature capability and long useful life of 5,000 h while still being able to withstand high ripple currents.

The capacitors can replace banks of large screw terminal devices connected by a bus-bar with smaller parts connected by a PCB. This significantly lowers construction costs and enables soldering processing instead of manual mounting. With larger case sizes than standard two-terminal snap-in capacitors, the devices limit the number of components required.

As polarized aluminum electrolytic capacitors with a non-solid electrolyte, 299 PHL-4TSI series devices are suited for smoothing, filtering and energy storage in pulsed power applications. The devices are RoHS-compliant; their four-terminal configuration provides increased mechanical stability and keyed polarity.

Specifications for the capacitors include a capacitance range of 470 µF to 2,200 µF, tolerance of +/-20 percent, a rated voltage of 400 V to 450 V and an operating temperature range of -40° C to +105° C. The capacitor is sized at 35 mm to 50 mm in diameter by 45 mm to 100 mm long.

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