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Siemens 5SY7514-8 — 1-Pole MCB (DIN Rail)

Siemens 5SY7514-8 SENTRON MCB, D Curve, 0.3 A, 2-Pole

MPN5SY7514-8
Active

Siemens SENTRON 5SY7514-8 miniature circuit breaker, D tripping characteristic, 0.3 A rated current, 2-pole (1P+N), 15 kA breaking capacity per EN 60898, 50 kA per IEC 60947-2.

Siemens 5SY7514-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7514-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles2
Application suitabilityMechanical engineering / industry
5SY7514-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Rated value (EN 60898)15 kA
Overvoltage categoryIII
5SY7514-8 — Mounting & Connection
ParameterValue
Mounting positionany
Fastening methodQuick assembly system
Combined terminal, topYes
Combined terminal, bottomYes
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Modular width units2
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SY7514-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

The Siemens 5SY7514-8 is a SENTRON miniature circuit breaker with a D tripping characteristic, rated 0.3 A at AC across 50/60 Hz. It is a 2-pole unit configured as 1P+N, meaning it switches the line and protects the neutral but does not switch it.

Breaking capacity and standard compliance

At DC per IEC 60947-2 it holds 15 kA.

Thermal derating — the number that matters for real loads

The 0.3 A rating is at 35 °C ambient. At 45 °C it derates to 0.27 A, at 50 °C to 0.26 A, at 55 °C to 0.25 A, and at 60 °C to 0.24 A. The breaker also carries a humidity derating curve: max 95% RH up to 55 °C, then 55% RH up to 70 °C, then 35% RH up to 75 °C.

Mechanical fit and panel integration

Mounting position is any, so vertical or horizontal DIN-rail orientation works. The quick-assembly fastening system and combined top/bottom terminals simplify busbar and outgoing wiring. Sealable, halogen-free, and silicon-free construction.

Frequently asked questions

What is the breaking capacity of 5SY7514-8?

15 kA per EN 60898 and 50 kA per IEC 60947-2 at AC; 15 kA at DC per IEC 60947-2.

What does the D tripping characteristic mean for this 0.3 A breaker?

The D curve trips instantaneously at 10 to 20 times rated current (3 to 6 A), so it handles high inrush from transformers or power supplies without nuisance tripping on startup.

Will 5SY7514-8 drop into a panel specified around 5SY5240-7?

Both are 2-module-wide SENTRON MCBs on the same DIN-rail footprint, so the mechanical fit is identical. The difference is electrical: 5SY7514-8 is a 0.3 A D-curve, while 5SY5240-7 is a different rating and curve — verify the load current and trip characteristic before substituting.

How do I get current pricing and availability for 5SY7514-8?

Submit an RFQ through this listing. The part is sourced to order via independent distribution; availability and current pricing are confirmed at quote time.

What compliance documentation does Siemens provide for 5SY7514-8?

The breaker is halogen-free and silicon-free. It carries ratings per EN 60898 and IEC 60947-2, and is classified per IEC 81346-2 and DIN EN 61346-2 as function F. Standard Siemens declarations of conformity and material compliance (RoHS, REACH) are available on request.

MPN
5SY7514-8