Four terminal snap-in aluminium electrolytic capacitors reduce component counts

February 15, 2017 // By Nick Flaherty
Vishay Intertechnology has launched 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.

The 299 PHL-4TSI series reduces component counts and lowers costs while increasing mechanical stability and end-product lifetimes in power supplies and industrial and home appliance inverters. 

The capacitors have a cylindrical aluminum case with pressure relief and offer high ripple current from 2.45 A to 6.77 A, allowing designers to use 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 5000 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 — ranging from 35 mm by 50 mm to 45 mm by 100 mm — 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.

Specification Table:

Case size (D x L in mm)

35 x 50 to 45 x 100

Capacitance range

470 µF to 2200 µF


± 20 %

Ripple current  at 100 Hz and +105 °C

2.45 A to 6.77 A

Rated voltage

400 V to 450 V

Category temperature range

-40 °C to +105 °C

Useful life at +105 °C

5,000 h

Max. ESR at 100 Hz

60 mΩ to 240 mΩ

Max. impedance at 10 kHz

50 mΩ to 170 mΩ

Sectional specification

IEC 60384-4/EN130300

Climatic category IEC 60038


Samples and production quantities of the Vishay BCcomponents 299 PHL-4TSI series capacitors are available now, with lead times of 10 to 12 weeks.