The Type A designation means it detects not only sinusoidal AC fault currents but also pulsating DC fault currents, which are common from rectified loads like switching power supplies, variable-speed drives, and LED drivers. This makes it a better fit for modern panels than a basic Type AC device.
The 40 A rated current (In) is the continuous load it can carry without overheating — sized for a submain or a heavy branch circuit feeding multiple socket outlets or fixed equipment. The 30 mA residual trip threshold is the standard for personal shock protection in residential and commercial final circuits per IEC 60364. The instantaneous design (no intentional delay) means it trips within milliseconds of a fault — no selectivity with downstream RCCBs unless they are time-delayed (S-type).
The installation depth is 70 mm, matching the overall depth. The supply can enter from the top or bottom. Protection class is IP20 with the distribution board installed and conductors connected — suitable for indoor panel use only, not for wet or outdoor locations.
The 5SM3314-6KL carries the SENTRON brand and is designed to meet IEC/EN 61008-1 for RCCBs. It is silicon-free, which matters for applications sensitive to silicone outgassing (e.g., in paint shops or certain electronics assembly).