B3279X Series Capacitors

EPCOS' B3279X series capacitors feature capacitance ranges from 2 µF to 75 μF

Image of TDK Corporation/EPCOS, Inc.'s B3279X Series CapacitorsEPCOS presents a series of AC capacitors with capacitance ranges from 2 µF to 75 μF and radial terminals for PCB mounting. B3279X series output filter capacitors feature types for voltages up to 400 VAC and can be used in a wide range of output filter modules. Higher capacitance values can be realized by placing several capacitors in parallel in the PCB assembly, thus allowing filter designers and manufacturers to design power converters even up to 500 kW with modular systems. Compared to other AC filtering solutions, the B3279X series offers smaller size with higher capacitance values, higher current density per capacitance and volume, and operation at temperatures up to 105°C.

Power electronic designers are implementing more and more complex switching algorithms for pulse-width modulation (PWM) to gain efficiency and power quality. Such designs, however, introduce higher frequencies and harmonics into systems, which must be properly filtered by using LC and LCL filters at the output of the frequency converters. Applications for the new series are, in particular, in star-connected LCL circuits of three-phase power converters (DC/AC or AC/AC) for drives. Additional applications include inverters for solar power as well as UPS systems and discrete filters. The capacitors can also be used in single-phase systems.

  • Smaller size; higher capacitance
  • Higher current density per capacitance and volume
  • Automated high-volume production
  • Modular EMC filter designs possible
  • Operating temperature up to 105°C
  • Technology: MKP wound
  • Capacitance range: 2.0 µF to 75 µF
  • Lead spacing: 27.5 mm to 52.5 mm
  • High voltage test: 1.5 kVms (AC), 10 s
  • Max. operating temperature: 105°C
  • Max. continuous AC voltage [50/60 Hz]: 250, 300, 350, 400 Vrms

Image of TDK Corporation/EPCOS, Inc.'s B3279X Series Capacitors Block Diagram

A typical application is an output filter module (e.g. LCL) in star connection in a three-phase power converter
(DC/AC or AC/AC). The capacitors can also be used in single-phase systems.

B3279x Series

ImageManufacturer Part NumberDescriptionCapacitanceToleranceAvailable Quantity
B32794D2635K datasheet linkCAP FILM 6.3UF 10% 630VDC RADIALB32794D2635KCAP FILM 6.3UF 10% 630VDC RADIAL6.3µF±10%490 - Immediate
B32794D2635K product page link
B32794D2156K datasheet linkCAP FILM 15UF 10% 630VDC RADIALB32794D2156KCAP FILM 15UF 10% 630VDC RADIAL15µF±10%814 - Immediate
B32794D2156K product page link
B32798G2756K datasheet linkCAP FILM 75UF 10% 630VDC RADIALB32798G2756KCAP FILM 75UF 10% 630VDC RADIAL75µF±10%259 - Immediate
B32798G2756K product page link
B32794D2255K datasheet linkCAP FILM 2.5UF 10% 630VDC RADIALB32794D2255KCAP FILM 2.5UF 10% 630VDC RADIAL2.5µF±10%1474 - Immediate
B32794D2255K product page link
B32794D3805K datasheet linkCAP FILM 8UF 10% 700VDC RADIALB32794D3805KCAP FILM 8UF 10% 700VDC RADIAL8µF±10%1141 - Immediate
B32794D3805K product page link
B32796E2226K datasheet linkCAP FILM 22UF 10% 630VDC RADIALB32796E2226KCAP FILM 22UF 10% 630VDC RADIAL22µF±10%251 - Immediate
B32796E2226K product page link
B32796E3306K datasheet linkCAP FILM 30UF 10% 700VDC RADIALB32796E3306KCAP FILM 30UF 10% 700VDC RADIAL30µF±10%307 - Immediate
B32796E3306K product page link
B32796E2256K datasheet linkCAP FILM 25UF 10% 630VDC RADIALB32796E2256KCAP FILM 25UF 10% 630VDC RADIAL25µF±10%407 - Immediate
B32796E2256K product page link
B32796E2406K datasheet linkCAP FILM 40UF 10% 630VDC RADIALB32796E2406KCAP FILM 40UF 10% 630VDC RADIAL40µF±10%45 - Immediate
B32796E2406K product page link
B32794D3335K datasheet linkCAP FILM 3.3UF 10% 700VDC RADIALB32794D3335KCAP FILM 3.3UF 10% 700VDC RADIAL3.3µF±10%0B32794D3335K product page link
Published: 2012-06-29