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Siemens
  • Power contactor
  • Size S0
  • AC-3
  • 25 HP/480 V
  • Auxiliary contact: 1 x NO+ 1 x NC
  • Control voltage: 24 V DC
  • Screw connection
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Main contactor Siemens SIRIUS 3RT20281BB40

2 year warranty Money back guaranty
Item number: 101322
UPC / EAN: 662643918045
Corresponding accessories
Auxiliary switch block Siemens SIRIUS 3RH29111FA22
Auxiliary switch block Siemens SIRIUS 3RH29111FA22
Auxiliary contact block for contactor relays, For 3RH and 3RT contact relays, 2 x NO/2 x NC contacts, Screw terminals
Item number: 400741
MSRP: $62.50
$30.00
plus sales tax plus shipping
few in stock
Shipping today
Auxiliary switch block Siemens SIRIUS 3RH29111HA01
Auxiliary switch block Siemens SIRIUS 3RH29111HA01
Auxiliary contact block for contactor relays and motor contactors, Size S00/S0, Auxiliary contacts: 1 x NC, Screw connection
Item number: 101416
MSRP: $29.60
$14.21
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21261CB0
Overload relay Siemens SIRIUS 3RU21261CB0
Overload relay for motor protection, 1.8-2.5 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset, Internal earth-fault detection
Item number: 101345
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21261DB0
Overload relay Siemens SIRIUS 3RU21261DB0
Overload relay for motor protection, 2.2-3.2 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101346
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21261EB0
Overload relay Siemens SIRIUS 3RU21261EB0
Overload relay for motor protection, 2.8-4 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101347
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21261FB0
Overload relay Siemens SIRIUS 3RU21261FB0
Overload relay for motor protection, 3.5-5 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101348
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21261GB0
Overload relay Siemens SIRIUS 3RU21261GB0
Overload relay for motor protection, 4.5-6.3 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101349
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21261HB0
Overload relay Siemens SIRIUS 3RU21261HB0
Overload relay for motor protection, 5.5-8 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101350
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21261JB0
Overload relay Siemens SIRIUS 3RU21261JB0
Overload relay for motor protection, 7-10 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101351
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21261KB0
Overload relay Siemens SIRIUS 3RU21261KB0
Overload relay for motor protection, 9-12.5 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101352
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21264AB0
Overload relay Siemens SIRIUS 3RU21264AB0
Overload relay for motor protection, 11-16 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101353
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21264BB0
Overload relay Siemens SIRIUS 3RU21264BB0
Overload relay for motor protection, 14-20 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101354
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21264CB0
Overload relay Siemens SIRIUS 3RU21264CB0
Overload relay for motor protection, 17-22 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101355
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21264DB0
Overload relay Siemens SIRIUS 3RU21264DB0
Overload relay for motor protection, 20-25 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101356
MSRP: $131.50
$93.37
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21264EB0
Overload relay Siemens SIRIUS 3RU21264EB0
Overload relay for motor protection, 27-32 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101357
MSRP: $202.00
$143.42
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21264FB0
Overload relay Siemens SIRIUS 3RU21264FB0
Overload relay for motor protection, 34-40 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101358
MSRP: $202.00
$143.42
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21264NB0
Overload relay Siemens SIRIUS 3RU21264NB0
Overload relay for motor protection, 23-28 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101488
MSRP: $202.00
$143.42
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RU21264PB0
Overload relay Siemens SIRIUS 3RU21264PB0
Overload relay for motor protection, 30-36 A, Size S0, CLASS 10, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset
Item number: 101490
MSRP: $202.00
$153.52
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RB31234NB0
Overload relay Siemens SIRIUS 3RB31234NB0
Overload relay for motor protection, 0.32-1.25 A, Size S0, CLASS 5-30, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset, Internal earth-fault detection
Item number: 101365
MSRP: $302.00
$238.58
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RB31234PB0
Overload relay Siemens SIRIUS 3RB31234PB0
Overload relay for motor protection, 1-4 A, Size S0, CLASS 5-30, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset, Internal earth-fault detection
Item number: 101366
MSRP: $302.00
$238.58
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RB31234QB0
Overload relay Siemens SIRIUS 3RB31234QB0
Overload relay for motor protection, 6-25 A, Size S0, CLASS 5-30, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset, Internal earth-fault detection
Item number: 101368
MSRP: $302.00
$238.58
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RB31234SB0
Overload relay Siemens SIRIUS 3RB31234SB0
Overload relay for motor protection, 3-12 A, Size S0, CLASS 5-30, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset, Internal earth-fault detection
Item number: 101367
MSRP: $302.00
$238.58
plus sales tax plus shipping
in stock
Shipping today
Overload relay Siemens SIRIUS 3RB31234VB0
Overload relay Siemens SIRIUS 3RB31234VB0
Overload relay for motor protection, 10-40 A, Size S0, CLASS 5-30, Screw connection, Auxiliary contacts 1 x NC/NO, Manual/automatic reset, Internal earth-fault detection
Item number: 101369
MSRP: $376.00
$297.04
plus sales tax plus shipping
in stock
Shipping today
Corresponding accessories
Surge suppressor Siemens SIRIUS 3RT29261ER00
Surge suppressor Siemens SIRIUS 3RT29261ER00
Surge suppressor, Combination of diodes, 24 V DC, For motor contactors, Size S0
Item number: 101421
MSRP: $49.50
$23.76
plus sales tax plus shipping
in stock
Shipping today
Technical details
General data

Main contactor
1 x NO+1 x NC
S0

Electrical data

25 HP
690 V
24 V DC
6 kV

Mechanical data

750 1/h
45 mm
85 mm
107 mm
Screw terminals
Screw terminals

Ambient conditions

-25 °C
50 °C
IP20

Further information

UL, CSA, CE, EAC, CCC

Product description
Main contactor Siemens SIRIUS 3RT20281BB40
The compact power contactor 3RT2028-1BB40 from Siemens is offered for the performance range up to 25 HP at AC-3/480 V. The SIRIUS power contactor 3RT2028-1BB40 from Siemens uses a control supply voltage of 24 V DC and features one NC and one NO contact as auxiliary contacts as well as a practical screw-type connection. In size S0, the power contactor 3RT2028-1BB40 is suitable for all load feeders with the circuit breakers 3RV2021 and 3RV2321. The power contactor 3RT2028-1BB40 is used in automation and control technology, particularly to control motors and switch on electrical heating systems.
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