Film capacitor B3271

polypropylene filmmetalized polypropylene filmcylindrical

Overview
Up to +135 °C • Automotive grade • THB-robust • High current capability • UL 810-qualified versions

Summary
These film capacitors cover a wide range of rated voltages and capacitances for DC link designs. Available in 2-, 4- and multi-pin variants and in rectangular and cylindrical housings, they prioritise high energy density, ripple and pulse current capability, wide ambient temperature range and humidity resistance, compact size, low ESR and low self‑inductance for fast-switching power electronics (SiC, GaN).

Latest developments

• B3271 Series: Film capacitors for DC link applications with high energy and power density. Rated DC voltages 500 V to 1600 V; capacitances 0.47 µF to 170 µF; operating up to +105 °C. Typical life at rated voltage and +70 °C ≈ 95,000 h for rugged self‑healing types.
• xEVCap: Standardised modular DC link capacitor concept for powertrain inverters (passenger vehicles, commercial/off-highway vehicles and machinery). Scalable across power levels; compatible with wide‑bandgap semiconductors (SiC, GaN); low ESR/ESL and good self‑healing; compliant with IEC TS 6337:2024 and AEC‑Q200 Rev E for lead‑wire versions.

Features & benefits
Features

• Comprehensive portfolio for DC link applications
• Rated DC voltages up to 1600 V
• Capacitance per unit up to 480 µF (series dependent)
• Automotive-grade (AEC‑Q200) options available
• Compact designs with high RMS and pulse current capability
• THB-robust variants for harsh environments

Customer benefits
Savings

• Reduced PCB footprint due to high packing density
• Fewer components required thanks to high current/pulse capability
• Extended service life under THB conditions

Electrical

• Long operating life via advanced metallized polypropylene film
• Self‑healing behaviour
• Stable capacitance over voltage and temperature

Mechanical

• 2‑ and 4‑pin variants; lead‑wire and radial/boxed designs; rectangular and cylindrical housings

Environment

• Pb‑free, RoHS compatible

Data sheets (excerpt)
Rated voltage (V DC) ; Capacitance (µF) ; Temp max (°C) ; Design ; Type ; THB compliance ; AEC‑Q200
600 - 1200 ; 0.47 - 110 ; +125 ; Radial, boxed ; B3271*P ; +60 °C / 95% RH / VR DC / 1000 h ; Yes
630 - 840 ; 1 - 50 ; +125 ; Radial, boxed ; B3277*P ; +85 °C / 85% RH / VOP DC at +125 °C / 1000 h ; Yes
800 - 1200 ; 1 - 60 ; +135 ; Radial, boxed ; B3272*A/G/T ; +60 °C / 95% RH / VR DC / 1000 h ; Yes
300 - 875 ; 0.47 - 270 ; +105 ; Radial, boxed ; B3267*D/G/J/T ; +40 °C / 93% RH / VR DC / 1000 h ; Yes
450 - 1300 ; 1.5 - 480 ; +105 ; Radial, boxed ; B3277*D/E/G/J/T ; +40 °C / 93% RH / 0 V / 1344 h ; ---
450 - 1600 ; 0.33 - 120 ; +105 ; Radial, boxed ; B3277*M ; +85 °C / 85% RH / VR DC / 1000 h ; Yes
450 - 1600 ; 0.33 - 120 ; +105 ; Radial, boxed ; B3277*H ; +60 °C / 95% RH / VR DC / 1000 h ; Yes
500 - 920 ; 60 - 270 ; +105 ; Lead wire terminal ; B25654A*001 (xEVCap lead wire) ; +40 °C / 93% RH / VR DC / 1000 h ; Yes
500 - 1200 ; 0.68 - 170 ; +105 ; Radial, boxed ; B3277*X/Y/Z ; +40 °C / 93% RH / 0 V / 1344 h ; ---
500 - 1600 ; 0.47 - 170 ; +105 ; Radial, boxed ; B3271*H ; +60 °C / 95% RH / VR DC / 1000 h ; Yes

Applications
DC link for industrial variable‑speed drives, traction and powertrain inverters (xEV), solar inverters, household appliances, renewable energy systems and industrial automation where high ripple current, low ESR/ESL and THB reliability are required.

Technical specifications

• Rated DC voltage: typical range 300 V – 1600 V depending on series
• Capacitance range: approx. 0.33 µF – 480 µF depending on series
• Maximum operating temperature: up to +135 °C for selected series; common values +105 °C, +125 °C
• Designs: radial boxed, lead‑wire terminal, 2‑pin, 4‑pin, multi‑pin, rectangular and cylindrical housings
• Key electrical traits: low ESR, low ESL, high ripple and pulse current capability, self‑healing metallized polypropylene film
• Standards / qualifications: THB test variants, AEC‑Q200 for automotive lead‑wire types, IEC TS compliance for xEVCap
• Typical environments: automotive traction inverters, powertrain inverters, renewable energy inverters, industrial drives