The Siemens 5SM2336-6 is a residual current unit (RC unit) from the SENTRON family, designed to pair with a 5SL4 miniature circuit breaker to form an RCBO. It's a 3-pole, Type A device rated at 63 A with a 30 mA trip threshold — the standard sensitivity for personnel protection against direct contact. Type A detection means it catches sinusoidal AC faults plus pulsating DC residual currents, which covers most modern electronic loads like switched-mode power supplies and variable-speed drives.
Fit and mounting — panel integration
Snaps onto DIN rail (REG profile per), occupying 3 modular width units. The 70 mm depth matches the standard 5SL4 MCB it clips to, so the combined RCBO assembly sits flush in a distribution board. IP20 rating applies once installed with conductors connected — expected for enclosed panel gear. Silicon-free construction matters for applications like automotive paint shops or electronics assembly where silicone outgassing can cause adhesion or contact failures.
Thermal performance — the derating curve matters
Above that, the device derates linearly: 58.6 A at 40 °C, 58.59 A at 45 °C, 56.7 A at 50 °C, 54.81 A at 55 °C, 53.55 A at 60 °C, 52.29 A at 65 °C, and 50.4 A at 70 °C.
Key electrical specs at a glance
Surge current resistance is rated at 1 kA, meaning it can withstand a single lightning-induced surge of that magnitude without failing. Operating frequency is 50 Hz only; this is not a 50/60 Hz universal device. The RC unit is instantaneous (no short-time delay), so it trips immediately on a fault. That's appropriate for personnel protection, but if you need selectivity with downstream RCDs, you'd want a delayed (S-type) unit instead.
Compliance documentation
As a SENTRON device, the 5SM2336-6 is designed and tested to IEC/EN 61008 and related standards for residual current devices. The manufacturer provides the standard declaration of conformity, CE marking, and — upon request — the detailed test certificate. RoHS and REACH compliance documentation is available through the standard documentation package.