The Siemens SENTRON 5SP3735-2 is a 1-pole main miniature circuit breaker (SHU designation) with an E tripping characteristic, rated 35 A at 230 V / 50 Hz supply voltage. The insulation voltage (Ui) is rated 690 V, and surge voltage resistance is 6 kV, placing it in overvoltage category IV, suitable for the utility-side of the installation.
Fastens via busbar onto a 40 mm busbar system per DIN 43870 Part 2, with an alternative fastening method also on busbar. Occupies 1.5 modular width units; the enclosure depth is 76.3 mm, overall depth 89.5 mm, height 151.3 mm. Infeed is at the box terminal; the outgoing feeder uses a spring-loaded terminal. Conductor range: solid or stranded 2.5 mm² minimum to 50 mm² maximum. The switch position indicator shows OFF = green, ON = red.
Environmental and mechanical ratings
Protection class IP40 with connected conductors. Shock resistance: 30 g, at least 3 impacts, 11 ms duration. Vibration resistance per IEC 60068-2-6: 2 g, 20 frequency cycles 5 to 150 to 15 Hz. Mechanical service life: 20,000 operating cycles typical. Sealable for metering applications.