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Siemens 5SY7101-8 — 1-Pole MCB (DIN Rail)

Siemens 5SY7101-8 SENTRON MCB, D Curve, 1 Pole, 15 kA

MPN5SY7101-8
Active

Siemens SENTRON 5SY7101-8, miniature circuit breaker, D characteristic, 1-pole, 15 kA per EN 60898, 50 kA per IEC 60947-2, 400 V AC, 60 V DC, 1 MW unit, IP20.

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

Specifications

5SY7101-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityMechanical engineering / industry
5SY7101-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY7101-8 — Mounting & Connection
ParameterValue
Mounting positionany
Fastening methodQuick assembly system
Combined terminal, topYes
Combined terminal, bottomYes
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Modular width units1
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SY7101-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

The 5 kA rating per UL 1077 and CSA C22.2 No.235 confirms acceptance in North American panel applications. The 1 MW unit width (18 mm) means it occupies a single DIN-rail module — critical when fill factor in a crowded enclosure is tight.

Deployment context

Snaps onto DIN rail in any orientation — the quick assembly system and 18 mm width mean it fits standard 1 MW slots in a panel. The D characteristic is the key selection parameter for motor branch circuits: it avoids nuisance tripping on startup while still clearing a hard fault.

Frequently asked questions

How do I get current pricing and availability for 5SY7101-8?

Submit an RFQ. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time. No stock count or price is published here.

What compliance documentation does Siemens provide for 5SY7101-8?

The breaker is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No.235. It is halogen-free and silicon-free, which supports RoHS and REACH declarations. Vibration resistance per IEC 60068-2-6 is documented.

What is 5SY7101-8's depth?

The overall depth is 76 mm; installation depth is 70 mm. The 18 mm width (1 MW) and 90 mm height match the standard SENTRON 5SY footprint.

Will 5SY7101-8 drop into a panel specified around 5SY4140-7 without rewiring?

Both are 1-pole SENTRON MCBs with the same 18 mm width and DIN-rail mount, so the mechanical fit is identical. The difference is the tripping characteristic: 5SY7101-8 is D curve (high inrush tolerance), while 5SY4140-7 is a different characteristic. If the circuit needs the D curve, the swap is drop-in; if the original design used a B or C curve, the D curve may not provide adequate protection for low-surge loads. Check the load type before substituting.

MPN
5SY7101-8