3VA9978-0BB24 Siemens Undervoltage Release 120-127V AC Original Brand New


  • 3VA9978-0BB24
  • Family Name:3VA Family
  • For Use With:3VA4 / 5/ 6 Series
  • Primary Type:Internal Accessories
  • Series:3VA Series
  • Type:Under Voltage Release
  • UPC Code:804766323393
  • Voltage Rating:120 VAC

Available on backorder

Siemens Undervoltage release 120-127V AC 5 3VA9978-0BB24


Siemens 3VA Family | 3VA5 Series Molded Case Circuit Breakers – New Gen. One System. A Variety of Applications:

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 siemens circuit breakers offers safe, efficient and variable application options for low-voltage and medium-voltage power distribution. The 3VA molded case 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  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 3VA9978-0BB24, undervoltage release 120-127V AC 50/60Hz accessory for: 3VA4/5/6


DataSheet in PDF

Weight 0.107 kg
Dimensions 90.00 × 125.00 × 40.00 mm


product brand name


product designation


Product version

Auxiliary release


Auxiliary release

Degree of pollution


Overvoltage category


apparent power consumption / maximum

2 V·A

surge voltage resistance

4 kV


65.1 mm


25.7 mm

number of slots


tightening torque / with screw-type terminals / minimum

0.4 N·m

tightening torque / with screw-type terminals / maximum

0.5 N·m

Type of auxiliary circuit connection

AWG18 / 750 mm

stripped length

10 mm

stripped length [in]

0.4 in

tightening torque [lbf·in] / with screw-type terminals / minimum

3.5 lbf·in

tightening torque [lbf·in] / with screw-type terminals / maximum

4.4 lbf·in

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