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Siemens 5SL4450-7 — 4-Pole MCB (DIN Rail)

Siemens 5SL4450-7 SENTRON MCB, 4P C 50 A, 10 kA

MPN5SL4450-7
Active

Siemens SENTRON 5SL series, 5SL4450-7, 4-pole miniature circuit breaker, C tripping characteristic, 50 A rated current at 30 °C, 10 kA breaking capacity per EN 60898, 400 V AC.

Siemens 5SL4450-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL4450-7 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityResidential buildings/infrastructure
5SL4450-7 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC50 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, DC (max.)72 V
Voltage typeAC
5SL4450-7 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Rated breaking capacity (Icn), per EN 6089810 kA
Rated breaking capacity, per IEC 60947-210 kA
Energy limitation class3
Overvoltage categoryIII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SL4450-7 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SL4450-7 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)+55 °C, max. 95% humidity
5SL4450-7 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

The Siemens 5SL4450-7 is a SENTRON 4-pole miniature circuit breaker with a C tripping characteristic, rated 50 A at 30 °C and 10 kA breaking capacity per EN 60898 and IEC 60947-2.

Ratings & Derating

Rated 50 A at 30 °C, the 5SL4450-7 derates to 47.36 A at 40 °C, 46 A at 45 °C, and 43.09 A at 55 °C — the thermal curve matters when the breaker shares a crowded enclosure with other heat sources. Multi-phase operation is rated at 440 V AC maximum, covering standard 400 V three-phase panels with headroom.

Physical & Environmental Fit

Sealable, halogen-free, silicon-free, and touch-protected terminals simplify compliance for infrastructure and residential builds.

Frequently asked questions

Where can I buy 5SL4450-7?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

What is the breaking capacity of 5SL4450-7?

10 kA per EN 60898 and IEC 60947-2, at 400 V AC.

Will 5SL4450-7 drop into a panel specified around 5SL4120-7CC?

Both are 4-pole SENTRON 5SL-series MCBs with the same 72 mm width and DIN-rail mounting, so the physical fit is identical. The difference is rating: 5SL4450-7 is 50 A C-curve; 5SL4120-7CC is 20 A C-curve. No rewiring of the busbar or DIN rail is needed, but the branch circuit must be rated for 50 A.

MPN
5SL4450-7