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Siemens 5SY5450-7 — 4-Pole MCB (DIN Rail)

Siemens 5SY5450-7 SENTRON MCB, 4P, 50 A, C-Curve, 10 kA

MPN5SY5450-7
Active

Siemens SENTRON 5SY5450-7, 4-pole miniature circuit breaker, 50 A rated, C-curve trip characteristic, 10 kA breaking capacity per EN 60898, universal current AC/DC.

Siemens 5SY5450-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5450-7 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityuniversal current
5SY5450-7 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC50 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Voltage typeAC/DC
5SY5450-7 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Rated breaking capacity (Icn), per EN 6089810 kA
Energy limitation class3
Overvoltage categoryII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SY5450-7 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Fastening / mounting methodQuick assembly system
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SY5450-7 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C

Product details

Rated current and trip curve — what drives the fit

At 40 °C the rating derates to 48 A; at 50 °C it drops to 45.95 A, and at 60 °C to 43.8 A.

Breaking capacity and voltage — AC and DC sides

Breaking capacity is 10 kA per EN 60898 on the AC side, and 10 kA per EN 60898-2 on the DC side at 880 V. That 880 V DC rating is the standout — most 4-pole MCBs in this frame top out at 440 V DC. The 5SY5450-7 handles both poles in series for the DC path, so it's a candidate for 880 V battery banks or DC bus protection where you'd otherwise need two breakers in series. The voltage type is AC/DC universal current; on DC supply, observe polarity as marked.

The quick assembly system snaps onto the rail without tools. IP20 with connected conductors, pollution degree 2, overvoltage category II. Sealable, halogen-free, silicon-free.

Frequently asked questions

How do I get current pricing and availability for 5SY5450-7?

Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through independent distribution channels.

Will 5SY5450-7 drop into a panel that was specified around 5SY5416-7 without rewiring?

The 5SY5450-7 shares the same 4-module-wide DIN-rail footprint as the 5SY5416-7 — same 72 mm width, same 70 mm installation depth. The difference is the current rating: 50 A versus 16 A. If the panel wiring and upstream protection are sized for 50 A, it's a direct mechanical swap. If the existing circuit is only rated for 16 A, the breaker will physically fit but the conductors and bus bars must be verified for 50 A.

What compliance documentation does Siemens provide for 5SY5450-7?

The breaker carries EN 60898 and EN 60898-2 ratings for breaking capacity. It is halogen-free and silicon-free. For specific declarations (RoHS, REACH, UL listing per variant), the manufacturer's documentation is available on request.

MPN
5SY5450-7