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Siemens 5SJ4140-7HG42 — 1-Pole MCB (DIN Rail)

Siemens 5SJ4140-7HG42 SENTRON MCB, 1P C-curve 10kA

MPN5SJ4140-7HG42
Active

Siemens SENTRON 5SJ4 miniature circuit breaker, 1-pole, C-curve, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC, 60 V DC.

$101.76Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SJ4140-7HG42 — Identification
ParameterValue
Product designationMiniature circuit breakers
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityMechanical engineering / industry
5SJ4140-7HG42 — Electrical & Protection
ParameterValue
Tripping characteristic classC
Overvoltage category3
5SJ4140-7HG42 — Mounting & Connection
ParameterValue
Mounting positionany
Fastening methodon standard mounting rail
Combined terminal, topYes
Combined terminal, bottomYes
Width18 mm
Height121 mm
Depth70 mm
Installation depth70 mm
Modular width units1
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SJ4140-7HG42 — Environmental
ParameterValue
IP protection classIP20, with connected conductors, IP 40 in the handle range
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

It carries a C tripping characteristic, meaning it tolerates moderate inrush currents typical of motor starters and small transformers before opening on overload. Rated breaking capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC — enough for most secondary distribution panels where the upstream transformer limits fault current below those levels. The DC rating stops at 60 V, so it is not a candidate for higher-voltage DC bus protection.

Depth of 70 mm and height of 121 mm fit standard 1-pole MCB cutouts. No tunnel terminals are offered, so the combined style is the only termination option. IP20 with connected conductors, IP40 in the handle area — sufficient for enclosed panel use.

Frequently asked questions

What is the breaking capacity of this MCB?

Rated 10 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC. The higher IEC rating applies when the breaker is used in industrial applications per that standard.

What are the overall dimensions?

Width 18 mm (1 modular unit), height 121 mm, depth 70 mm. It snaps onto standard 35 mm DIN rail.

Can this MCB be used for DC circuits?

Yes, but only up to 60 V DC. For higher DC voltages, a different breaker rated for that range would be needed.

MPN
5SJ4140-7HG42