Skip to main content
Log in
Siemens 5SY7440-6 — 4-Pole MCB (DIN Rail)

Siemens 5SY7440-6 SENTRON MCB, 4P, 40A, B Curve, 15kA

MPN5SY7440-6
Active

Siemens SENTRON 5SY7440-6, 4-pole miniature circuit breaker, 40 A (at 35 °C), B characteristic, 400 V AC, 15 kA (EN 60898) / 20 kA (IEC 60947-2), IP20, quick-assembly system.

Siemens 5SY7440-6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7440-6 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY7440-6 — 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
5SY7440-6 — Protection
ParameterValue
Tripping characteristic (trip curve)B
Rated breaking capacity (Icn), per EN 6089815 kA
Rated breaking capacity, per IEC 60947-220 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
5SY7440-6 — 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
5SY7440-6 — 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

The 400 V AC rating and 15 kA breaking capacity per EN 60898 (20 kA per IEC 60947-2) tell you it can interrupt a fault up to those levels without upstream damage, which matters for selectivity coordination in a distribution panel. The current derates with ambient temperature: 37.6 A at 45 °C, 36.76 A at 50 °C, 35.92 A at 55 °C, 35.04 A at 60 °C.

Installation depth is 70 mm. Mounting position is any, so vertical or horizontal orientation works in tight enclosures. Sealable design allows padlocking the toggle in the off position for lockout/tagout.

Frequently asked questions

How do I get current pricing and availability for 5SY7440-6?

Submit an RFQ through this listing. Pricing and stock levels are confirmed at quote time through independent distribution channels — no fixed online price is published.

What is 5SY7440-6's listed depth (76 mm) on this component line?

The overall depth is 76 mm; the installation depth behind the panel face is 70 mm.

What is 5SY7440-6's listed width (72 mm) on this component line?

Width is 72 mm, which corresponds to 4 modular width units (18 mm per unit) on a standard DIN rail.

Will 5SY7440-6 drop into a panel that was specified around 5SY7140-8CC without rewiring?

No — the 5SY7140-8CC is a different pole count and current rating. The 5SY7440-6 is 4-pole 40 A; the 5SY7140-8CC is a different variant. Physical dimensions (72 mm wide, 4 MW) match the SENTRON 4-pole footprint, but verify terminal positions and busbar layout before substitution.

What compliance documentation does this brand provide for 5SY7440-6?

The SENTRON series carries IEC 60898 and IEC 60947-2 ratings on the label. Halogen-free and silicon-free construction is specified. For RoHS, REACH, and UL declarations, request the manufacturer's compliance documentation with your RFQ — these are not listed in the basic spec record.

MPN
5SY7440-6