TDK introduces compact Y1 safety capacitors for operations up to 500 V (AC) and +125 °C

October 21, 2026

TDK Corporation (TSE: 6762) has introduced the compact B3201*A5/B5/C5 series of Y1 safety capacitors designed to suppress EMI in demanding automotive and industrial applications. The metallized polypropylene (MKP) film capacitors are rated for AC voltages of 500 V and DC voltages of up to 1500 V. Featuring a maximum operating temperature of up to +125 °C (with derating), they combine a space-saving footprint with AEC-Q200 Rev. E compliance and high robustness under severe ambient conditions. Typical applications include xEV power electronics, on-board chargers, EV charging infrastructure, industrial drives, power supplies, renewable energy converters, and energy storage systems.

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This series offers capacitance values ranging from 0.47 to 33 nF and is available with lead spacings of 15 and 22.5 mm. The smaller B32012 variants measure 5.0 x 10.5 x 18.0 mm, and the B32013 types extend the capacitance range to 33 nF. The compact dimensions help developers implement reliable line-to-ground filtering where PCB space is limited. Parallel wire leads support conventional through-hole mounting. The components are available untaped or in ammo-pack and reel configurations.

The capacitors are rated for continuous operation at 500 V (AC) and 1500 V (DC), respectively, at temperatures of up to +110 °C. At operating temperatures above +110 °C and up to the maximum of +125 °C, the operating voltage must be derated by 1.5% per degree Celsius. Operation within this elevated temperature range is limited to a maximum of 1000 hours.

For applications exposed to heat and humidity, the B3201*A5/B5/C5 series is tested at +85 °C, 85% relative humidity, and 500 V (AC) for 500 hours (THB test). Their self-healing MKP construction supports reliable operation under electrical stress, while the plastic case and epoxy resin sealing meet UL 94 V-0 flammability requirements. The series is approved according to IEC/EN/UL 60384-14, CSA E60384-14, and GB/T 6346.14.

Main applications 

     – xEV power electronics and on-board chargers

     – EV charging infrastructure

     – Industrial drives and frequency converters

– Telecom, datacom, and server power supplies

– Solar PV inverters and renewable energy systems

– Uninterruptible power supplies (UPS) and energy storage systems (ESS)

Main features and benefits 

     – Y1 safety class for line-to-ground EMI suppression

– Rated AC voltage of 500 V

– Maximum operating temperature of +125 °C

– Compact dimensions for space-constrained PCB layouts

– AEC-Q200 Rev. E compliant

– THB performance at +85 °C, 85% RH, and 500 V AC for 500 hours

– Good self-healing properties

– ENEC, UL, CSA, and CQC approvals

– RoHS-compatible