Surpassing the operating temperature range of -40°C to +150°C, TDK's ACT45B series is applicable to ECUs placed not only inside the engine compartment, but directly on the engine as well. Metal plates capable of resisting the diverse stresses caused by thermal expansion and contraction due to soldering are used at the joints on the circuit boards to achieve high reliability. The original integrated design equipped with a stress absorbing damper feature delivers high reliability for a long period of time under severe mounting conditions, such as direct placement of the ECU on the engine.

The original automatic connection system and non-fusion connection structures were developed to firmly integrate coils and metal terminals, providing connection strength that can withstand rapid thermal changes/shocks and intense repetitive vibrations. Providing implementation flexibility in the thermal shock resistance cycle and vibration-proof conductive adhesive application processes as well as lead-free high-temperature reflow processes.