3VA5120-4EC31-0AA0 Siemens 3VA Molded Case Circuit Breakers Original Brand New


  • 3VA5120-4EC31-0AA0
  • Alternate Mfr Part Number:3VA5120-4EC31-0AA0
  • Current Rating:20 A
  • Family Name:3VA Family
  • Number of Poles:3 Pole
  • Series:3VA Series
  • Type:Thermal/Magnetic
  • UPC Code:804766300356

Available on backorder

Siemens 3VA Molded Case Circuit Breakers –  3VA5120-4EC31-0AA0

Requirements are increasing for cost-effective and energy-efficient operation of the electrical power distribution. Whether in industrial applications or buildings, our new 3VA molded case circuit breaker offers safe, efficient and variable application options for low-voltage and medium-voltage power distribution. The 3VA circuit breakers provides UL frame sizes covering 125A to 600A with the 3VA5 and 3VA6 models, as well as IEC frame sizes covering 100A to 630A with the 3VA1 and 3VA2 models.

Siemens 3VA molded case circuit breakers meet both IEC 60947-2 and UL489 standards, and are suitable for global use. The system offers the best preconditions for switchgear manufacturers who export worldwide. You can use all functions of the molded case circuit breaker for plants that are operated in North America and in Europe and be completely confident of full compliance with the standards.


  • Up to 250 A, TM, 600 V, up to 100 kA
  • Tested in Accordance with UL489 and IEC 60947-2
  • Molded Case Circuit Breaker Portfolio Suitable for Global Use Thanks to UL and
  • Maximum flexibility thanks to the modular design of the internal and external accessories
  • Outstanding selectivity, for example, makes planning very simple
  • State-of-the-art manufacturing techniques
  • All-round product support provided by integrated online support tools
  • For Protecting Cables, Electrical Loads, and Industrial Plants
  • 3VA5 with TMTU in 1- and 3-Pole Versions Up to 250 A
  • 3VA6 with ETU in Four Breaking Capacity Classes, 3- and 4-Pole Versions Up to 600 A
  • ETU 8-Series with Integrated Metering Function, Optimal Communication via Ethernet (Modbus TCP), Modbus RTU, PROFIBUS, or PROFINET
  • Extensive Range of Accessories for Flexible Function Expansions


Siemens 3VA5120-4EC31-0AA0, circuit breaker 3VA5 UL frame 125 breaking capacity class S 25kA @ 480V 3-pole, line protection TM230, FTAM, In=20A overload protection Ir=20A fixed short-circuit protection Ii=7.5…15 x In without connection


DataSheet in PDF

Weight 0.963 kg
Dimensions 35125254803-230.2020 × -75.15 mm


product brand name


product designation

Molded-case circuit breaker

product designation / according to UL file


Product version

System protection

design of the load switch / acc. to UL 489 / Heating, Air Conditioning, and Refrigeration circuit breaker (HACR Type)


design of the load switch / acc. to UL 489 / High-Intensity-Discharge circuit breaker (HID Type)


design of the load switch / acc. to UL 489 / Switching Duty circuit breaker (SWD Type)


design of the overcurrent release


protection function of the overcurrent release


number of poles


rated insulation voltage Ui

800 V

Max. rated operational voltage Ue with DC

500 V

power loss [W] / maximum

12.2 W

Active power loss / for rated value of the current / at AC / in hot operating state / per pole

4.07 W

mechanical service life (switching cycles) / typical

20 000

Electrical endurance (switching cycles) / at AC-1 / at 380/415 V 50/60 Hz

8 000

Electrical endurance (switching cycles) / at AC-1 / at 690 V 50/60 Hz

4 000

electrical endurance (switching cycles) / at 480 V

8 000

electrical endurance (switching cycles) / at 600 V

4 000

Neutral conductors / upgradeable/retrofittable


product function

● communication function


● other measurement function


marking / acc. to UL 489 / 100%-rated breaker


operational current

● at 40 °C

20 A

● at 45 °C

20 A

● at 50 °C

19 A

● at 55 °C

19 A

● at 60 °C

19 A

● at 65 °C

18 A

● at 70 °C

18 A

switching capacity class of the circuit breaker


breaking capacity maximum short-circuit current (Icu)

breaking capacity operating short-circuit current (Ics)

short-circuit current making capacity (Icm)

● at 415 V

75.6 kA

● at 690 V

7.5 kA

design of short-circuit protection

For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter

breaking capacity current

● at 240 V

65 kA

● at 480 V

25 kA

● at 600 Y/347 V

14 kA

Adjustable response value current / lg min.

20 A

Ground fault protection / tripping switchable / I2t=ON/OFF


height [in]

5.51 in


140 mm

width [in]

3 in


76.2 mm

depth [in]

3.01 in

arrangement of electrical connectors / for main current circuit

Without connection

type of electrical connection / for main current circuit


product component

● undervoltage release


● voltage trigger


● trip indicator


number of CO contacts / for auxiliary contacts


product extension / optional / motor drive


protection class IP / on the front


ambient temperature

● during operation / minimum

-25 °C

● during operation / maximum

70 °C

● during storage / minimum

-40 °C

● during storage / maximum

80 °C

reference code / acc. to IEC 81346-2


certificate of suitability / as approval for NAVAL (no combat vessels) / supplement SB


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