TDK Corp. has introduced the B41699 and B41799 series of ultra-compact aluminum electrolytic capacitors with axial-lead and soldering star designs, respectively, for automotive applications. These vibration-resistant capacitors can withstand operating temperatures of up to 140°C.

The aluminum electrolytic capacitors also feature high capacitance and high ripple current in a space-saving footprint, offering several variants from 16 × 25 mm to 21 × 49 mm (D x H). This reduces the number of capacitors required in powertrain modules, such as electric power steering (EPS), fan control, and transmission systems, TDK said.

(Source: TDK Corp.)

Offering low equivalent series resistance (ESR), the B41699 and B41799 capacitors are available with rated voltages of 25 V and 35 V, and capacitance values ranging from 1,800 µF to 13,000 µF. Other key specifications include ripple currents of up to 34.6 A (IAC, max) at 10 kHz and 125°C case temperature, and over 4,000 hours of useful life (at 125°C, rated voltage, and rated ripple current).

These aluminum electrolytic capacitors also offer vibration stability up to 60 g (optional). This capability makes them suited for xEV platforms operating within a 12-V board net, where thermal stress, mechanical vibration, and compact integration are critical design factors, the company said.

The axial-lead version (B41699) and the soldering star version (B41799) provide flexible mounting options for horizontal, vertical, or busbar configurations. Their SIKOREL-based construction allows for a storage life of up to 15 years at 35°C. They are RoHS-compatible and compliant with AEC-Q200 standards.

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