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Siemens 3VA4120-5ED34-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA4120-5ED34-0AA0 SENTRON MCCB, 20 A, 85 kA at 240

MPN3VA4120-5ED34-0AA0
Active

Siemens SENTRON 3VA4120-5ED34-0AA0, molded-case circuit breaker, 3-pole, 20 A rated, 85 kA at 240 VAC, TM210 thermal-magnetic trip unit, system protection design.

Siemens 3VA4120-5ED34-0AA0 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3VA4120-5ED34-0AA0 — Identification
ParameterValue
Product designationMolded-case circuit breaker
Brand / rangeSENTRON
3VA4120-5ED34-0AA0 — Ratings
ParameterValue
Number of poles3
Rated operational voltage Ue (AC)690 V
Current at 40 °C20 A
Current at 45 °C20 A
Current at 50 °C19 A
Current at 55 °C19 A
Current at 60 °C18 A
Current at 65 °C18 A
Current at 70 °C17 A
Switching capacity classM
Breaking capacity at 240 V85 kA
Power loss, max.8.5 W
3VA4120-5ED34-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM210
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA4120-5ED34-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typeInfeed side: Low tab
Main circuit connector arrangementoutput side: circular conductor connection
Protection class (IP), frontIP40
3VA4120-5ED34-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionNo
Auxiliary CO contacts0
3VA4120-5ED34-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA4120-5ED34-0AA0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.15 000
Height129.4 mm
Width76.2 mm
Depth75.1 mm
Height (in)5.09 in
Width (in)3 in
Depth (in)2.96 in

Product details

The Siemens 3VA4120-5ED34-0AA0 is a 3-pole SENTRON molded-case circuit breaker (MCCB) rated 20 A continuous at 40 °C, with a TM210 thermal-magnetic trip unit — fixed thermal, fixed magnetic — designed for system protection in distribution panels. Interrupting capacity hits 85 kA at 240 VAC, 35 kA at 480 VAC, and 18 kA at 600Y/347 VAC — numbers that tell you this breaker handles high available fault current on the secondary side of a large transformer without needing a current-limiting fuse upstream.

Thermal derating — the real-world current you can run

At 50 °C it derates to 19 A, at 60 °C to 18 A, and at 70 °C to 17 A.

Dimensions are 76.2 mm wide, 129.4 mm tall, 75.1 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON or third-party distribution panels without re-drilling the mounting plate.

Frequently asked questions

What is the interrupting capacity of this MCCB?

85 kA at 240 VAC, 35 kA at 480 VAC, and 18 kA at 600Y/347 VAC — sufficient for most secondary-side distribution applications.

Where can I buy 3VA4120-5ED34-0AA0 and how is it quoted?

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

MPN
3VA4120-5ED34-0AA0