The 1.5KE56CA-R0 is a surface-mount transient voltage suppressor diode from Taiwan Semiconductor. It is a unidirectional device, meaning it can only protect against overvoltage in one direction – in this case, from voltage spikes, surges, and ESD (electrostatic discharge) pulses. The device has an operating voltage of 58.5v and a breakdown voltage of 65v. It has a power dissipation rating of 500mW and a holding current of 10mA minimum. The device is protected against surges up to 1500 watts and is AEC-Q101 qualified. It features low peak pulse power dissipation, low clamping voltage, and fast response time.