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Siemens 5SY5205-7CC — 2-Pole MCB (DIN Rail)

Siemens 5SY5205-7CC SENTRON MCB, 2P DC 440V 10kA C-0.5A

MPN5SY5205-7CC

Siemens SENTRON 5SY5205-7CC, 2-pole DC miniature circuit breaker, 440 V DC, 10 kA interrupting capacity per IEC 60947-2, C characteristic, 0.5 A rated current.

Siemens 5SY5205-7CC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5205-7CC — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY5205-7CC — Electrical
ParameterValue
Number of poles2
5SY5205-7CC — Protection
ParameterValue
Tripping characteristic classC
Overvoltage categoryIII
5SY5205-7CC — Mechanical
ParameterValue
Modular width units2
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors
5SY5205-7CC — Environmental
ParameterValue
Pollution degree3

Product details

DC-rated MCB for 440 V photovoltaic and industrial DC bus circuits

The Siemens SENTRON 5SY5205-7CC is a 2-pole DC miniature circuit breaker rated at 440 V DC with a 10 kA interrupting capacity per IEC 60947-2 and a C tripping characteristic at 0.5 A. Polarity matters on the DC side: the supply cord position must respect polarity markings on the device. The 2-pole (2P) configuration switches both lines, so it fully isolates the load.

Compared to the AC-rated sibling 5SY7206-7CC (400 V AC, 30 kA per IEC 60947-2), this DC variant trades higher AC interrupting capacity for the ability to break DC arcs at elevated voltage — a fundamentally different arc-extinction challenge.

Panel fit and environmental tolerance

Mounting position is unrestricted. Ambient range spans -40 °C to +75 °C, with humidity derating above 55 °C — max 95% RH at 55 °C, dropping to 35% at 75 °C. IP20 with connected conductors; the touch-protection feature (finger-safe terminals) is standard. Sealable design allows lockout/tagout. Halogen-free and silicon-free construction avoids corrosion risk in sealed enclosures.

Frequently asked questions

What is the closest functional second-source to 5SY5205-7CC?

The 5SY7206-7CC is a 2-pole AC-only (400 V) MCB with a 30 kA interrupting capacity and C characteristic — not a direct DC substitute. The 5SY5250-7 offers higher DC interrupting capacity (15 kA) but at a higher current rating. Neither is a drop-in replacement for the 0.5 A DC-rated 5SY5205-7CC.

Will 5SY5205-7CC drop into a panel specified around 5SY7206-7CC?

Physically yes — both share the same 36 mm width, 76 mm depth, 90 mm height, and DIN-rail quick-assembly mounting. Electrically no: the 5SY7206-7CC is AC-only (400 V, 30 kA), while this part is DC-rated (440 V, 10 kA). Rewiring and coordination study required.

What compliance documentation does Siemens provide for 5SY5205-7CC?

The part carries IEC 60947-2 DC interrupting rating and is designed for pollution degree 3, overvoltage category III. It is halogen-free and silicon-free. Standard Siemens declarations of conformity (CE/UKCA) and RoHS/REACH documentation are available upon request.

MPN
5SY5205-7CC