Skip to main content
Siemens 5SY8220-8BB08 — 2-Pole MCB (DIN Rail)

Siemens 5SY8220-8BB08 SENTRON MCB, 2P D 20A 30kA

MPN5SY8220-8BB08
Active

Siemens SENTRON 5SY8220-8BB08 miniature circuit breaker, 2-pole, D tripping characteristic, 20 A rated current, 30 kA breaking capacity at 400 V AC, 2 modular width units.

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

Specifications

5SY8220-8BB08 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY8220-8BB08 — Electrical
ParameterValue
Number of poles2
5SY8220-8BB08 — Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY8220-8BB08 — 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
5SY8220-8BB08 — Environmental
ParameterValue
Pollution degree3

Product details

Depth is 76 mm (70 mm installation depth), so it clears standard 80 mm deep enclosures without a gland-plate conflict.

Tripping characteristic and ratings

D-curve means magnetic-only tripping — no thermal bimetal. It handles inrush from motor starters, transformers, or capacitive loads without nuisance trips. Rated 20 A continuous at 440 V single- or multi-phase AC, with a maximum DC operating voltage of 72 V. Breaking capacity under UL 1077 / CSA C22.2 No. 235 is 5 kA — check your panel SCCR if using it in a North American branch circuit application.

Frequently asked questions

Where can I buy 5SY8220-8BB08 and how is it quoted?

It is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is the breaking capacity of 5SY8220-8BB08?

30 kA per IEC 60947-2 at 400 V AC; 5 kA per UL 1077 and CSA C22.2 No. 235.

What is the tripping characteristic of this MCB?

D-curve — magnetic-only tripping, designed for motor and transformer inrush without nuisance trips.

What compliance documentation is available for 5SY8220-8BB08?

The product carries IEC 60947-2 and UL 1077 / CSA C22.2 No. 235 ratings. It is halogen-free and silicon-free. Specific RoHS/REACH declarations are available from the manufacturer upon request.

MPN
5SY8220-8BB08