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 35ย A (20ย kHz, 125 ยฐC). The new types are designed for a rated voltage of 63ย V, cover a capacitance range from 390ย ยตF to 720ย ยตF, and offer an extremely low ESR value. For example, with a cup size of 16ย mmย xย 30ย mm (Dย xย H) and an ambient temperature of 20ย ยฐC, an ESR of 3.9ย mฮฉ at 20ย kHz can be achieved. Even at an operating temperature of -40ย ยฐC, the ESR is just 5.4ย mฮฉ.
Due to their highly rugged construction, the capacitors offer a high vibration strength of 60 g and can be operated at up to 150 ยฐC. 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 ยฐC)
- Extremely low ESR value of just 3.9 mฮฉ at 20 kHz and 20 ยฐC
- High vibration strength of 60 g
