A good PCB layout for optimal thermal performance would be to have a large copper area connected to the tab of the device, and to use thermal vias to dissipate heat to the other layers of the PCB.
To ensure reliable operation at high temperatures, it's essential to follow the recommended derating curves for the device, and to ensure good thermal management, such as using a heat sink or a thermal interface material.
Exceeding the maximum junction temperature can lead to a reduction in the device's lifetime, and in extreme cases, can cause permanent damage to the device.
To protect the device from EOS, it's recommended to use a transient voltage suppressor (TVS) or a metal-oxide varistor (MOV) in parallel with the device, and to ensure that the device is not exposed to voltage spikes or surges that exceed its maximum ratings.
The recommended soldering conditions for the BTA20-600CWRG are a peak temperature of 260°C, with a soldering time of 10 seconds or less, and a maximum of 2 soldering cycles.