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Siemens 5SP3740-3 — 1-Pole MCB (DIN Rail)

Siemens 5SP3740-3 SENTRON MCB, 1P E 25 kA 230/400 V

MPN5SP3740-3
Active

Siemens SENTRON, miniature circuit breaker (MCB), 1-pole, tripping characteristic E, 25 kA rated breaking capacity, 230/400 V AC, 50 Hz, DIN rail mount.

Siemens 5SP3740-3 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SP3740-3 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityResidential buildings/infrastructure
5SP3740-3 — Electrical & Protection
ParameterValue
Tripping characteristic classE
Overvoltage categoryIV
5SP3740-3 — Mounting & Connection
ParameterValue
Fastening methodDIN rail
Height128 mm
Depth76.3 mm
Modular width units1.5
Torque, min.-40 °C
Torque, max.70 °C
SealableYes
5SP3740-3 — Environmental
ParameterValue
IP protection classIP40, with connected conductors
Pollution degree3

Product details

Siemens 5SP3740-3 — SENTRON 1-pole MCB, Characteristic E, 25 kA

The Siemens 5SP3740-3 is a 1-pole SENTRON miniature circuit breaker with tripping characteristic E, rated for 230 V AC (50 Hz) and a breaking capacity of 25 kA per EN 60898.

Physical Fit & Environmental Ratings

Height 128 mm, depth 76.3 mm — fits standard 1.5-module DIN-rail cutouts. The depth dimension is the enclosure depth behind the panel face; verify clearance to the back wall or wiring duct. Ambient range -40 to 70 °C covers extreme cold storage or hot substation conditions. Shock rated 30 g, 11 ms duration; vibration 2 g, 5–150 Hz per IEC 60068-2-6 — survives transport and moderate machine vibration. Sealable via integrated locking slide for lock, wire seal, or cable tie.

MPN
5SP3740-3