The Siemens SENTRON 5SL6206-6MB is a 2-pole miniature circuit breaker rated 6 A with a B tripping characteristic, designed for 400 V AC systems and a 6 kA interrupting capacity per EN 60898.
Touch protection is built in, so accidental contact with the line-side terminals is prevented when the breaker is installed per the manufacturer's instructions. Halogen-free and silicon-free construction avoids outgassing concerns in clean environments or sealed enclosures.
Compared to the 5SL3120-6MB (a 3-pole C-curve 20 A unit), the 5SL6206-6MB is a 2-pole B-curve 6 A breaker. The B-curve is faster on moderate overloads, so it coordinates better with sensitive downstream loads. The 2-pole format means it switches both phase conductors but does not switch the neutral — verify your circuit's neutral switching requirement before specifying.
The 10 000 switching cycles mechanical service life is typical for this class — adequate for occasional manual operation and fault clearing, not for daily switching duty.