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Siemens 5SY8220-8 — 2-Pole MCB (DIN Rail)

Siemens 5SY8220-8 SENTRON MCB, 20 A, 2-Pole, D Curve, 30 kA

MPN5SY8220-8
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Siemens SENTRON 5SY8220-8, 2-pole miniature circuit breaker, D characteristic, 20 A rated current, 30 kA breaking capacity at 400 V AC, 36 mm width.

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

Specifications

5SY8220-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY8220-8 — Electrical
ParameterValue
Number of poles2
5SY8220-8 — Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY8220-8 — 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
5SY8220-8 — Environmental
ParameterValue
Pollution degree3

Product details

20 A D-curve MCB for motor and transformer circuits

At DC the same standard rates it 15 kA, and under UL 1077 / CSA C22.2 No. 235 it carries 5 kA. IP20 with conductors connected; pollution degree 3 suits factory-floor panels.

Thermal derating and environmental range

Rated 20 A at 45 °C ambient; at 50 °C it derates to 19.38 A, and at 55 °C to 18.74 A. Humidity tolerance is specified per: 95% RH up to 55 °C, derating to 35% at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.

Frequently asked questions

What is the breaking capacity of 5SY8220-8?

30 kA at 400 V AC per IEC 60947-2, 15 kA at DC per the same standard, and 5 kA under UL 1077 / CSA C22.2 No. 235.

Where can I buy 5SY8220-8 and how is it quoted?

The part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your required quantity and delivery window.

What compliance documentation does Siemens provide for 5SY8220-8?

The MCB carries IEC 60947-2 and UL 1077 / CSA C22.2 No. 235 ratings. It is halogen-free and silicon-free. Standard documentation includes the declaration of conformity, CE marking, and RoHS/REACH compliance statements available from Siemens.

MPN
5SY8220-8