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Siemens 5SY8514-8 — 1-Pole MCB (DIN Rail)

Siemens 5SY8514-8 SENTRON MCB, D-curve 2-pole 0.3 A 70 kA

MPN5SY8514-8
Active

Siemens SENTRON 5SY8514-8 miniature circuit breaker, D tripping characteristic, 2-pole (1P+N), 0.3 A rated current, 70 kA breaking capacity per IEC 60947-2.

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

Specifications

5SY8514-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles2
Application suitabilityMechanical engineering / industry
5SY8514-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY8514-8 — 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
5SY8514-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

The Siemens 5SY8514-8 is a SENTRON miniature circuit breaker with a D tripping characteristic, 2 poles (1P+N), rated 0.3 A at AC. It delivers a 70 kA breaking capacity per IEC 60947-2 and 15 kA DC per the same standard, with a UL 1077 interrupting rating of 5 kA.

The neutral pole is switched internally (1P+N configuration). Accepts combined terminals top and bottom. Position of the supply cord is any orientation. Sealable and touch-protected per the product feature listing.

Environmental & compliance

Halogen-free and silicon-free construction. Degree of pollution 3, overvoltage category III. Humidity limits: max 95% at 55 °C, derating to 55% at 70 °C and 35% at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. IP20 with connected conductors. Suitability for mechanical engineering and industry applications.

Frequently asked questions

Where can I buy 5SY8514-8 and how do I get a price?

The 5SY8514-8 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is 5SY8514-8's listed depth?

The 5SY8514-8 has an overall depth of 76 mm and an installation depth of 70 mm.

What is 5SY8514-8's listed width?

The 5SY8514-8 has a width of 36 mm, occupying 2 modular width units on DIN rail.

Will 5SY8514-8 drop into a panel specified around 5SY5240-7 without rewiring?

Both are SENTRON MCBs on the same DIN-rail footprint, but the 5SY5240-7 is a different pole count and rating. The 5SY8514-8 is 2-pole (1P+N) at 0.3 A D-curve; verify your panel's pole configuration and current rating before swapping. The mechanical envelope (36 mm width, 76 mm depth) is standard across the series, so panel space is compatible.

What compliance documentation does Siemens provide for 5SY8514-8?

The 5SY8514-8 is rated per IEC 60947-2 (70 kA breaking capacity), UL 1077 and CSA C22.2 No. 235 (5 kA), and carries an overvoltage category III rating. It is halogen-free and silicon-free. Standard Siemens SENTRON documentation includes RoHS and REACH declarations available through the manufacturer's support portal.

MPN
5SY8514-8