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Siemens 5SY3120-7 — 1-Pole MCB (DIN Rail)

Siemens 5SY3120-7 SENTRON MCB, 1P C-Curve 20A 4.5kA

MPN5SY3120-7

Siemens SENTRON 5SY3 series, miniature circuit breaker, 1-pole, C tripping characteristic, 20 A rated current, 4.5 kA (EN 60898) / 6 kA (IEC 60947-2) breaking capacity.

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

Specifications

5SY3120-7 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
5SY3120-7 — Electrical & Protection
ParameterValue
Tripping characteristic classC
Rated value (EN 60898)4.5 kA
Overvoltage categoryIII
5SY3120-7 — Mounting & Connection
ParameterValue
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
SealableYes
5SY3120-7 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Halogen-freeYes
Silicone-freeYes

Product details

It breaks faults at 4.5 kA per EN 60898 and 6 kA per IEC 60947-2, with a DC rating of 15 kA per IEC 60947-2. At 18 mm width per pole (1 width unit), it fits standard DIN-rail distribution boards and subpanels.

Mounts via quick assembly system (DIN rail) in any position. The 18 mm width (1 width unit) and 90 mm height keep panel fill factor predictable.

Halogen-free and silicon-free construction. Sealable for tamper-proof installations. Overvoltage category III, energy limiting class 3. Touch protection is provided. Compliance documentation per RoHS, REACH, UL 1077 (5 kA at AC), and CSA C22.2 No. 235 is standard with the part.

Frequently asked questions

How do I get current pricing and availability for 5SY3120-7?

Pricing and availability are confirmed at quote time against an RFQ through independent distribution. Submit an RFQ for current figures.

What is 5SY3120-7's listed depth?

The 5SY3120-7 has a depth of 76 mm, with an installation depth of 70 mm behind the panel.

What conductor sizes does 5SY3120-7 accept?

The terminals accept solid and stranded conductors from 0.75 mm² up to 35 mm².

What compliance documentation does 5SY3120-7 carry?

The 5SY3120-7 is rated per EN 60898 (4.5 kA), IEC 60947-2 (6 kA AC, 15 kA DC), and UL 1077 / CSA C22.2 No. 235 (5 kA AC). It is halogen-free and silicon-free, meeting RoHS and REACH requirements.

MPN
5SY3120-7