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TDK Releases Hybrid Polymer Aluminum Capacitors with Enhanced Ripple Current Capability

10.12.2021
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TDK Corporation presents with the B40640B* and B40740B* series hybrid polymer capacitors with a very high ripple current capability increased by up to 29% compared to preceding types.

The ripple current capability is now up to 35 A (20 kHz, 125 °C). The new types are designed for a rated voltage of 63 V, cover a capacitance range from 390 µF to 720 µF, and offer an extremely low ESR value. For example, with a cup size of 16 mm x 30 mm (D x H) and an ambient temperature of 20 °C, an ESR of 3.9 mΩ at 20 kHz can be achieved. Even at an operating temperature of -40 °C, the ESR is just 5.4 mΩ.

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Due to their highly rugged construction, the capacitors offer a high vibration strength of 60 g and can be operated at up to 150 °C. A very low thermal resistance is achieved due to the inner structure of all axial-hybrid polymer capacitors, which are optimized for the thermal connection to a heatsink. Moreover, the axial design ensures a stable connection to the heatsinks throughout the service life. Depending on the capacitance values, the dimensions vary between 14 mm x 25 mm and 16 mm x 30 mm (D x H). The RoHS-compatible capacitors are available in axial-lead (B40640B*) and solder star (B40740B*) designs, both with and without PET hose.

The rugged design and excellent electrical parameters of these capacitors are ideally suited to automotive applications in 48 V on-board supplies.

Main fields of application

  • Automotive applications for 48 V on-board supplies

Main features and benefits

  • Very high ripple current capability of up to 35 A (20 kHz, 125 °C)
  • Extremely low ESR value of just 3.9 mΩ at 20 kHz and 20 °C
  • High vibration strength of 60 g
Source: TDK

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