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Siemens 5SY4520-8 — 1-Pole MCB (DIN Rail)

Siemens 5SY4520-8 SENTRON MCB, D-Curve 2-Pole 10kA IEC

MPN5SY4520-8
Active

Siemens SENTRON 5SY4520-8 miniature circuit breaker, D tripping characteristic, 2-pole (1P+N), 10 kA (IEC 60898-1) / 20 kA (IEC 60947-2), 230 V AC, 60 V DC.

$21.59Ref. price · indicative, final on quote
Siemens 5SY4520-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4520-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles2
Pole design1P+N
Application suitabilityMechanical engineering / industry
5SY4520-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY4520-8 — 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
5SY4520-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

It is a 2-pole unit (1P+N) that switches the neutral conductor, rated for 230 V AC and 60 V DC. The interrupting capacity is 10 kA per IEC 60898-1 and 20 kA per IEC 60947-2, with 15 kA at DC per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No.235.

IP20 with connected conductors; pollution degree 3 suits it for industrial control panels where dust and conductive deposits are present.

Certified to IEC / EN 60898-1 (domestic and similar installations) and IEC / EN 60947-2 (industrial switchgear), plus UL 1077. Halogen-free and silicon-free construction. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. Mechanical service life 10,000 operating cycles typical.

Frequently asked questions

Where can I buy 5SY4520-8 and what is the lead time?

The 5SY4520-8 is sourced to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

What is the difference between 5SY4520-8 and the 5SY4116-7CV?

The 5SY4116-7CV is a C-curve breaker (magnetic trip at 5–10× In) versus the D-curve on the 5SY4520-8 (10–20× In). For motor or transformer loads with high inrush, the D-curve holds without nuisance tripping; the C-curve is better for general-purpose distribution. Both share the same 2-pole (1P+N) form factor and mount in the same DIN footprint, so swapping between them requires no rewiring — just verify the trip curve matches the load.

What compliance documentation does Siemens provide for 5SY4520-8?

The 5SY4520-8 carries IEC / EN 60898-1 and IEC / EN 60947-2 certifications, plus UL 1077. It is halogen-free and silicon-free. Standard RoHS and REACH declarations are available through the Siemens documentation portal.

MPN
5SY4520-8