Skip to main content
Siemens 5SY8615-8 — 4-Pole MCB (DIN Rail)

Siemens 5SY8615-8 SENTRON MCB, D-curve 4P 70kA, 400V AC

MPN5SY8615-8
Active

Siemens SENTRON 5SY8615-8, miniature circuit breaker, D characteristic, 4-pole (3P+N), 70 kA at 400 V AC per IEC 60947-2, UL 1077 listed.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY8615-8 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY8615-8 — Ratings
ParameterValue
Number of poles4
Pole configuration3P+N
Rated voltage, AC (multi-phase)440 V
5SY8615-8 — Protection
ParameterValue
Tripping characteristic (trip curve)D
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
5SY8615-8 — 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
5SY8615-8 — 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
5SY8615-8 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)1 W

Product details

The neutral pole is switched, so it breaks the neutral on a fault, which matters for TN-S or TN-C-S systems where you want isolation on all poles.

Halogen-free and silicon-free construction, which matters for environments where outgassing contaminates sensitive electronics or clean-room processes.

Compliance and environmental range

Rated for -40 °C to 75 °C ambient, so it handles unheated enclosures in cold climates and high-temp industrial cabinets near ovens or furnaces. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz, so it's fine on machinery with moderate vibration. The DC breaking capacity is 15 kA at 60 V (max 72 V) per IEC 60947-2, and UL 1077 listing gives 5 kA at the same voltage — useful if you're feeding DC bus circuits downstream.

Frequently asked questions

Where can I buy 5SY8615-8 and how is it quoted?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price figure is published here.

What does the D tripping characteristic mean for this breaker?

The D curve trips magnetically at 10 to 20 times rated current, designed for loads with high inrush like motors, transformers, and welding equipment. It avoids nuisance trips on startup while still protecting against short circuits.

What compliance documentation does 5SY8615-8 carry?

It complies with IEC / EN 60947-2 and UL 1077, carries CE marking, and is halogen-free and silicon-free. The standard documentation package includes the declaration of conformity and test certificates per those standards.

Will 5SY8615-8 drop into a panel designed for 5SY4304-7CV?

The 5SY8615-8 is a 4-pole (3P+N) D-curve breaker in a 4-module-width housing. The 5SY4304-7CV is a different pole count and characteristic — verify the existing panel's wiring scheme and mounting footprint before substitution. The DIN-rail mounting is standard, but the neutral switching and terminal arrangement may differ.

MPN
5SY8615-8