Dielectric strength

A distinction should be made between:

Dielectric strength (destruction limit): Exceedance can result in irreversible changes to the electronics

Against a specified reference ground
Differential

Recommended operating voltage range: If the range is exceeded, it can no longer be assumed that the system operates as specified

Against a specified reference ground
Differential

Dielectric strength 1: — Recommended operating voltage range

The device documentation may contain particular specifications and timings, taking into account:

Self-heating
Rated voltage
Insulating strength
Edge steepness of the applied voltage or holding periods
Normative environment (e.g. PELV)