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Siemens 5SY7405-7 — 4-Pole MCB (DIN Rail)

Siemens 5SY7405-7 SENTRON MCB, 4P C-Curve, 400V AC, 15kA IEC

MPN5SY7405-7
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Siemens SENTRON 5SY7405-7 miniature circuit breaker, 4-pole, C-curve, 400 V AC, 15 kA (IEC 60898), 50 kA (IEC 60947-2), 4 modular width units, IP20.

Siemens 5SY7405-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7405-7 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY7405-7 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC400 V
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Voltage typeAC
5SY7405-7 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Rated breaking capacity (Icn), per EN 6089815 kA
Rated breaking capacity, per IEC 60947-250 kA
Breaking capacity, AC (UL 1077 / CSA C22.2 No.235)5 kA
Energy limitation class3
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SY7405-7 — 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
5SY7405-7 — 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
5SY7405-7 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

It protects branch circuits against overload and short-circuit in final distribution panels, rated 400 V AC at 50/60 Hz. Breaking capacity hits 15 kA per IEC 60898 and 50 kA per IEC 60947-2 — the higher figure covers industrial panel duty where fault current can run hot. For UL 1077 / CSA C22.2 No. 235 installations, it's rated 5 kA. The IP20 enclosure (with conductors connected) suits enclosed distribution boards — not washdown environments.

Depth of 76 mm and installation depth of 70 mm mean it clears standard 80 mm deep enclosures. Ambient range -40 °C to 75 °C, with humidity derating above 55 °C (95% RH up to 55 °C, then 55% to 70 °C, 35% to 75 °C).

Frequently asked questions

Where can I buy 5SY7405-7?

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

Will 5SY7405-7 drop into a panel specified for 5SY7210-7CC?

Both are 4-pole SENTRON MCBs on the same DIN-rail footprint, but 5SY7210-7CC is a different current rating and curve — verify the branch-circuit protection requirements before swapping.

What compliance documentation does Siemens provide for 5SY7405-7?

The part carries IEC 60898 and IEC 60947-2 ratings, plus UL 1077 / CSA C22.2 No. 235 listing. Standard Siemens declarations (CE, UKCA) apply; specific RoHS/REACH declarations are available on request.

MPN
5SY7405-7