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Siemens 5SY7520-8 — 1-Pole MCB (DIN Rail)

Siemens 5SY7520-8 SENTRON MCB, 20 A D-curve, 2-pole

MPN5SY7520-8
Active

Siemens SENTRON miniature circuit breaker, 5SY7520-8, 2-pole 1P+N, 20 A rated, D tripping characteristic, 15 kA (EN 60898) / 25 kA (IEC 60947-2), IP20 with connected conductors.

Siemens 5SY7520-8 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SY7520-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles2
Application suitabilityMechanical engineering / industry
5SY7520-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Rated value (EN 60898)15 kA
Overvoltage categoryIII
5SY7520-8 — 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
5SY7520-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

Siemens 5SY7520-8 — SENTRON MCB, 20 A, D-curve

Thermal derating and ambient limits

Rated current holds at 20 A up to 35 °C ambient. Above that, derate linearly: 18.78 A at 40 °C, 18.14 A at 45 °C, 17.48 A at 50 °C, 16.8 A at 55 °C, and 16.08 A at 60 °C. The breaker's operating range spans -40 °C to 75 °C, with humidity limits of 95% up to 55 °C, 55% up to 70 °C, and 35% up to 75 °C.

Mounting and wiring notes

Snap-on DIN rail mount, any orientation. The breaker is sealable (lockable in the OFF position) and includes touch protection on the line-side terminals.

Frequently asked questions

Where can I buy 5SY7520-8 and get a price?

The 5SY7520-8 is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time, not from a static listing.

What is the closest functional second-source to 5SY7520-8?

The 5SY7210-7CC is a functional peer in the same SENTRON family, also a 2-pole D-curve MCB. The delta is the rated current — 5SY7520-8 is 20 A, while 5SY7210-7CC is a different amp rating. Check the specific load current before substituting; the form factor and breaking capacity are comparable.

Will 5SY7520-8 drop into a panel specified around 5SY7210-7CC?

Yes, the 5SY7520-8 shares the same 2-module-wide DIN-rail footprint (36 mm width, 76 mm depth) and terminal layout as the 5SY7210-7CC. No rewiring or busbar repositioning needed — the swap is form-fit-function identical aside from the current rating.

What compliance documentation does Siemens provide for 5SY7520-8?

The 5SY7520-8 carries ratings per EN 60898 (15 kA) and IEC 60947-2 (25 kA), overvoltage category III, pollution degree 3, and IP20 with connected conductors. It is halogen-free and silicon-free. Standard Siemens declarations of conformity (CE/UKCA) and material compliance (RoHS, REACH) are available on request.

MPN
5SY7520-8