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Siemens 5SP3735 — 1-Pole MCB (DIN Rail)

Siemens 5SP3735 SENTRON MCB, 1P 35A E-Curve 25kA

MPN5SP3735

Siemens SENTRON 5SP3 series, main miniature circuit breaker (SHU), selective, 1-pole, 35 A, tripping characteristic E, 25 kA per EN 60898, 230 V AC, 50 Hz.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SP3735 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Application suitabilityResidential buildings/infrastructure
5SP3735 — Electrical & Protection
ParameterValue
Tripping characteristic classE
Rated value (EN 60898)25 kA
Overvoltage categoryIV
5SP3735 — Mounting & Connection
ParameterValue
Height128 mm
Depth76.3 mm
Torque, min.2.5 mm²
Torque, max.50 mm²
SealableYes
5SP3735 — Environmental
ParameterValue
IP protection classIP20, with connected conductors

Product details

Selective main MCB for 35 A feeder circuits

The Siemens 5SP3735 is a 1-pole SENTRON main miniature circuit breaker (SHU) with a selective E tripping characteristic, rated 35 A at 230 V AC, 50 Hz. The E-curve means it is designed for selective coordination — it withstands short-duration overcurrents from downstream MCBs without tripping, so only the faulted branch opens.

That is a high interrupting rating for a 1-pole device, suited for main distribution boards close to the transformer where fault levels are high. The 35 A continuous rating handles feeder circuits supplying sub-distribution or large loads. Insulation voltage is rated 690 V, and the overvoltage category is IV (equipment for installation at the origin of the installation).

Occupies 2 width units (approx. 36 mm). Saddle terminals are fitted. The housing is sealable (provision for a lead seal). Switch position indicator shows OFF = green, ON = red. Mechanical service life is 20 000 switching cycles typical.

Rated shock resistance is 30 g for at least 3 impacts of 11 ms duration. Vibration resistance per IEC 60068-2-6 is 2 g over 20 frequency cycles from 5 to 150 to 5 Hz.

Frequently asked questions

What is the breaking capacity of the 5SP3735?

The rated breaking capacity is 25 kA per EN 60898 at 230 V AC. This is the interrupting rating — the maximum fault current the MCB can safely clear.

What does the E tripping characteristic mean?

The E-curve is a selective (time-delayed) characteristic. It allows short-duration overcurrents from downstream MCBs to clear without tripping the main breaker, providing selective coordination in distribution panels.

What conductor sizes does the 5SP3735 accept?

Terminals accept solid or stranded conductors from 2.5 mm² minimum up to 50 mm² maximum. Saddle terminals are fitted for secure clamping.

Where can I buy the 5SP3735 and how is it quoted?

This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time.

Will the 5SP3735 drop into a panel specified for the 5SL6563-7BB?

No — the 5SP3735 is 1-pole, 35 A, E-curve, 25 kA, while the 5SL6563-7BB is 2-pole (1P+N), 63 A, C-curve, 6 kA. They are functionally different products for different roles. The 5SP3735 is a selective main MCB; the 5SL is a standard branch MCB. Panel wiring and busbar arrangements would differ.

MPN
5SP3735