TECO-Westinghouse

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The A510 drive is a heavy duty VFD with power ranging from 1 to 400HP. Some models come with a built-in braking transistor, while others require an external braking unit. TWMC offers the TBU braking unit, where multiple units can be wired in parallel to achieve a higher braking power. We’ve created significantly more effective resistors by lowering the resistance to its minimum threshold, and creating multi-resistor configurations. This means multiple braking units can be connected to a single enclosure with multiple braking resistors.

Find your appropriate resistor by opening the “A510 Braking Resistors” table, and selecting based on your drive HP and voltage. These resistors assume the standard duty that TECO-Westinghouse uses, a 10% duty cycle.

If you require a more effective braking solution (one resistor and one braking unit), or are looking for higher braking power with a larger duty cycle, please get in touch with us.

DriveVoltageDrive HPDrive kWBraking UnitBraking Unit QuantityBraking Resistor Part NumberTotal Power (Watts)Per Resistor Power (Watts)Resistance (Ohms)
A510230V10.75--EM-TW-00125025022
A510230V21.5--EM-TW-00125025022
A510230V32.2--EM-TW-00837037017.5
A510230V53.7--EM-TW-01355055018
A510230V7.55.5--EM-TW-01755055018
A510230V107.5--EM-TW-02483083012
A510230V1511--EM-TW-0412500250012
A510230V2015--EM-TW-044400040007.18
A510230V2518.5--EM-TW-051780078007.13
A510230V3022JNTBU-2301EM-TW-049610061005.58
A510230V4030JNTBU-2302EM-TW-0627200360010.4
A510230V5037JNTBU-2302EM-TW-061620031005.64
A510230V6045JNTBU-2302EM-TW-0631220061005.58
A510230V7555JNTBU-2302EM-TW-0631220061005.58
A510230V10075JNTBU-2303EM-TW-0661220140673.72
A510230V12590JNTBU-2304EM-TW-0692440061005.58
A510230V150110JNTBU-2304EM-TW-0692440061005.58
A510460V10.75--EM-TW-003270270120
A510460V21.5--EM-TW-003270270120
A510460V32.2--EM-TW-010530530100
A510460V53.7--EM-TW-01670070060
A510460V7.55.5--EM-TW-02096096045
A510460V107.5--EM-TW-02796096045
A510460V1511--EM-TW-0371700170043
A510460V2015--EM-TW-0321560156022.5
A510460V2518.5--EM-TW-0545000500014.4
A510460V3022--EM-TW-0545000500014.4
A510460V4030--EM-TW-0586300630011.3
A510460V5037JNTBU-4302EM-TW-06413200660019.2
A510460V6045JNTBU-4302EM-TW-06413200660019.2
A510460V7555JNTBU-4302EM-TW-06513200660019.2
A510460V10075JNTBU-4303EM-TW-06819800660019.2
A510460V12590JNTBU-4303EM-TW-06819800660019.2
A510460V150110JNTBU-4304EM-TW-07026400660019.2
A510460V175132JNTBU-4304EM-TW-07026400660019.2
A510460V215160JNTBU-4305EM-TW-07333000660019.2
A510460V270200JNTBU-43062x EM-TW-06839600660019.2
A510460V300220JNTBU-43062x EM-TW-06839600660019.2
A510460V375280JNTBU-43082x EM-TW-07052800660019.2
A510460V425315JNTBU-4309EM-TW-07859400660019.2
A510575V10.75--EM-TW-004290290130
A510575V21.5--EM-TW-007290290130
A510575V32.2--EM-TW-012700700135
A510575V53.7--EM-TW-023700700135
A510575V7.55.5--EM-TW-02915001500130
A510575V107.5--EM-TW-03015001500130
A510690V1511--EM-TW-0361700170025
A510690V2015--EM-TW-0423200320026
A510690V2518.5--EM-TW-0463200320026
A510690V3022--EM-TW-0474100410025.5
A510690V4030--EM-TW-0485400540026


The E510 drive is a compact VFD with power ranging from 1/2 to 75HP. Some models come with a built-in braking transistor, while others require an external braking unit. TWMC offers the TBU braking unit, where multiple units can be wired in parallel to achieve a higher braking power. We’ve created significantly more effective resistors by lowering the resistance to its minimum threshold, and creating multi-resistor configurations. This means multiple braking units can be connected to a single enclosure with multiple braking resistors.

Find your appropriate resistor by opening the “E510 Braking Resistors” table, and selecting based on your drive HP and voltage. These resistors assume the standard duty that TECO-Westinghouse uses, a 10% duty cycle.

If you require a more effective braking solution (one resistor and one braking unit), or are looking for higher braking power with a larger duty cycle, please get in touch with us.

DriveVoltageDrive HPDrive kWBraking UnitBraking Unit QuantityBraking Resistor Part NumberTotal Power (Watts)Per Resistor Power (Watts)Resistance (Ohms)
E510220V0.50.4--EM-TW-00216016070
E510220V10.75--EM-TW-00216016070
E510220V21.5--EM-TW-00216016070
E510220V32.2--EM-TW-00943043080
E510220V54--EM-TW-01564064030
E510220V7.55.5--EM-TW-01960060028
E510220V107.5--EM-TW-02586086016.5
E510220V1511--EM-TW-0403600360010.4
E510220V2015--EM-TW-0403600360010.4
E510220V2518.5--EM-TW-051780078007.13
E510220V3022--EM-TW-049610061005.58
E510220V4030JNTBU-2302EM-TW-061620031005.64
E510400V10.75--EM-TW-003270270120
E510400V21.5--EM-TW-003270270120
E510400V32.2--EM-TW-010530530100
E510400V54--EM-TW-01670070060
E510400V7.55.5--EM-TW-02163063054
E510400V107.5--EM-TW-0281100110052.5
E510400V1511--EM-TW-0382000200051
E510400V2015--EM-TW-0331700170025
E510400V2518.5--EM-TW-0555300530015.2
E510400V3022--EM-TW-0545000500014.4
E510400V4030--EM-TW-0606600660019.2
E510400V5037JNTBU-4302EM-TW-06413200660019.2
E510400V6045JNTBU-4302EM-TW-06413200660019.2
E510400V7555JNTBU-4302EM-TW-06513200660019.2


The F510 drive is a fan and pump application VFD with power ranging from 1 to 800HP. Some models come with a built-in braking transistor, while others require an external braking unit. TWMC offers the TBU braking unit, where multiple units can be wired in parallel to achieve a higher braking power. We’ve created significantly more effective resistors by lowering the resistance to its minimum threshold, and creating multi-resistor configurations. This means multiple braking units can be connected to a single enclosure with multiple braking resistors.

Find your appropriate resistor by opening the “F510 Braking Resistors” table, and selecting based on your drive HP and voltage. These resistors assume the standard duty that TECO-Westinghouse uses, a 10% duty cycle.

If you require a more effective braking solution (one resistor and one braking unit), or are looking for higher braking power with a larger duty cycle, please get in touch with us.

DriveVoltageDrive HPDrive kWBraking UnitBraking Unit QuantityBraking Resistor Part NumberTotal Power (Watts)Per Resistor Power (Watts)Resistance (Ohms)
F510240V5--EM-TW-01460060028
F510240V7.5--EM-TW-01867067022
F510240V10--EM-TW-02694094018
F510240V15--EM-TW-0412500250012
F510240V20--EM-TW-045330033009.6
F510240V25--EM-TW-052820082007.44
F510240V30--EM-TW-050710071006.51
F510240V40JNTBU-2302EM-TW-061620031005.64
F510240V50JNTBU-2302EM-TW-061620031005.64
F510240V60JNTBU-2302EM-TW-0631220061005.58
F510240V75JNTBU-2303EM-TW-0661220140673.72
F510240V100JNTBU-2303EM-TW-0661220140673.72
F510240V125JNTBU-2304EM-TW-0692440061005.58
F510240V150JNTBU-2305EM-TW-0713050061005.58
F510460V5--EM-TW-01670070060
F510460V7.5--EM-TW-02270070060
F510460V10--EM-TW-02796096045
F510460V15--EM-TW-0371700170043
F510460V20--EM-TW-0341600160040
F510460V25--EM-TW-0575000500024
F510460V30--EM-TW-0535000500014.4
F510460V40--EM-TW-0597700770013.8
F510460V50JNTBU-4302EM-TW-06413200660019.2
F510460V60JNTBU-4302EM-TW-06413200660019.2
F510460V75JNTBU-4302EM-TW-06513200660019.2
F510460V100JNTBU-4303EM-TW-06719800660019.2
F510460V125JNTBU-4303EM-TW-06819800660019.2
F510460V150JNTBU-4303EM-TW-06819800660019.2
F510460V175JNTBU-4305EM-TW-07233000660019.2
F510460V215JNTBU-43062x EM-TW-06739600660019.2
F510460V250JNTBU-4305EM-TW-07333000660019.2


The L510 is a micro drive with a power range of 1/4 to 3HP. The 1-3HP models come with a built-in braking transistor, open the “L510 Braking Resistors” table and select based on your drive HP.

DriveDrive HPEM Part NumberPower (Watts)Resistance (Ohms)
L5101EM-TW-0061700750
L5102EM-TW-005950420
L5103EM-TW-011570250


Teco-Westinghouse has a standard offering of braking units starting with the model numbers “TBU-“.

Based on your drive voltage and drive HP, TWMC has provided the appropriate braking unit and quantity to be used. To achieve higher braking power, multiple units can be connected in parallel, with a resistor connected to each.

We have provided a braking resistor cross-reference list with multi-resistor configurations, where one enclosure can have multiple resistors that connect to multiple braking units.

If you are looking for a more ideal solution, we can help provide a complete solution with a single braking chopper and braking resistor.

VoltageDrive HPBraking UnitBraking Unit QuantityBraking Resistor Part NumberTotal Power (Watts)Per Resistor Power (Watts)Resistance (Ohms)
220V15TBU-2301EM-TW-039310031005.64
220V20TBU-2301EM-TW-043310031005.64
220V25TBU-2301EM-TW-049610061005.58
220V30TBU-2301EM-TW-049610061005.58
220V40TBU-2302EM-TW-061620031005.64
220V50TBU-2302EM-TW-061620031005.64
220V60TBU-2302EM-TW-0631220061005.58
220V75TBU-2302EM-TW-0631220061005.58
220V100TBU-2303EM-TW-0661220140673.72
220V125TBU-2304EM-TW-0692440061005.58
220V150TBU-2304EM-TW-0692440061005.58
440V15TBU-4301EM-TW-0351700170020
440V20TBU-4301EM-TW-0311700170020
440V25TBU-4301EM-TW-0566600660019.2
440V30TBU-4301EM-TW-0566600660019.2
440V40TBU-4301EM-TW-0606600660019.2
440V50TBU-4302EM-TW-06413200660019.2
440V60TBU-4302EM-TW-06413200660019.2
440V75TBU-4302EM-TW-06513200660019.2
440V100TBU-4303EM-TW-06819800660019.2
440V125TBU-4303EM-TW-06819800660019.2
440V150TBU-4304EM-TW-07026400660019.2
440V175TBU-4304EM-TW-07026400660019.2
440V215TBU-4305EM-TW-07333000660019.2
440V250TBU-4305EM-TW-07333000660019.2
440V300TBU-43062x EM-TW-06839600660019.2
440V350TBU-4307EM-TW-07646200660019.2
440V375TBU-43082x EM-TW-07052800660019.2
440V400TBU-43082x EM-TW-07052800660019.2
440V425TBU-4309EM-TW-07859400660019.2
440V500TBU-430102x EM-TW-07366000660019.2


Browse by Cross-Reference

EM Part NumberTotal Power (Watts)Power (Watts)Resistance (Ohms)WeightDimensions (L x W x H) inches
EM-TW-00125025022212.5 x 5 x 4.45H
EM-TW-00216016070212.5 x 5 x 4.45H
EM-TW-003270270120212.5 x 5 x 4.45H
EM-TW-004290290130212.5 x 5 x 4.45H
EM-TW-0059509504201815 x 14 x 5.25H
EM-TW-006170017007502122 x 11 x 5.25H
EM-TW-007290290130212.5 x 5 x 4.45H
EM-TW-00837037017.5212.5 x 5 x 4.45H
EM-TW-009430430801215 x 8 x 5.25H
EM-TW-0105305301001215 x 8 x 5.25H
EM-TW-0115705702501215 x 8 x 5.25H
EM-TW-0127007001351815 x 14 x 5.25H
EM-TW-013550550181215 x 8 x 5.25H
EM-TW-014600600281215 x 8 x 5.25H
EM-TW-015640640301215 x 8 x 5.25H
EM-TW-016700700601215 x 8 x 5.25H
EM-TW-017550550181215 x 8 x 5.25H
EM-TW-018670670221215 x 8 x 5.25H
EM-TW-019600600281215 x 8 x 5.25H
EM-TW-020960960451815 x 14 x 5.25H
EM-TW-021630630541215 x 8 x 5.25H
EM-TW-022700700601215 x 8 x 5.25H
EM-TW-0237007001351815 x 14 x 5.25H
EM-TW-024830830121815 x 14 x 5.25H
EM-TW-02586086016.51815 x 14 x 5.25H
EM-TW-026940940181815 x 14 x 5.25H
EM-TW-027960960451815 x 14 x 5.25H
EM-TW-0281100110052.51815 x 14 x 5.25H
EM-TW-029150015001301915 x 14 x 5.25H
EM-TW-030150015001301915 x 14 x 5.25H
EM-TW-03117001700201915 x 14 x 5.25H
EM-TW-0321560156022.52122 x 11 x 5.25H
EM-TW-03317001700252122 x 11 x 5.25H
EM-TW-03416001600402122 x 11 x 5.25H
EM-TW-03517001700201915 x 14 x 5.25H
EM-TW-03617001700252122 x 11 x 5.25H
EM-TW-03717001700432122 x 11 x 5.25H
EM-TW-03820002000512222 x 11 x 5.25H
EM-TW-039310031005.642122 x 11 x 5.25H
EM-TW-0403600360010.42722 x 14 x 5.25H
EM-TW-04125002500123022 x 14 x 5.25H
EM-TW-04232003200263022 x 14 x 5.25H
EM-TW-043310031005.642122 x 11 x 5.25H
EM-TW-044400040007.182822 x 14 x 5.25H
EM-TW-045330033009.62122 x 11 x 5.25H
EM-TW-04632003200263022 x 14 x 5.25H
EM-TW-0474100410025.54120 x 18 x 8.25H
EM-TW-04854005400264620 x 18 x 8.25H
EM-TW-049610061005.583820 x 18 x 8.25H
EM-TW-050710071006.514020 x 18 x 8.25H
EM-TW-051780078007.134020 x 18 x 8.25H
EM-TW-052820082007.444020 x 18 x 8.25H
EM-TW-0535000500014.43520 x 18 x 8.25H
EM-TW-0545000500014.43520 x 18 x 8.25H
EM-TW-0555300530015.23520 x 18 x 8.25H
EM-TW-0566600660019.23720 x 18 x 8.25H
EM-TW-05750005000244620 x 18 x 8.25H
EM-TW-0586300630011.33820 x 18 x 8.25H
EM-TW-0597700770013.84020 x 18 x 8.25H
EM-TW-0606600660019.23720 x 18 x 8.25H
EM-TW-061620031005.644520 x 18 x 8.25H
EM-TW-0627200360010.44820 x 18 x 8.25H
EM-TW-0631220061005.585520 x 24 x 8.25H
EM-TW-06413200660019.26020 x 24 x 8.25H
EM-TW-06513200660019.26020 x 24 x 8.25H
EM-TW-0661220140673.725520 x 24 x 8.25H
EM-TW-06719800660019.213034.5 x 21.6 x 15H
EM-TW-06819800660019.213034.5 x 21.6 x 15H
EM-TW-0692440061005.5813034.5 x 21.6 x 15H
EM-TW-07026400660019.219534.5 x 21.6 x 22.5H
EM-TW-0713050061005.5819534.5 x 21.6 x 22.5H
EM-TW-07233000660019.220034.5 x 21.6 x 30H
EM-TW-07333000660019.220034.5 x 21.6 x 30H
2x EM-TW-06739600660019.226034.5 x 21.6 x 15H
2x EM-TW-06839600660019.226034.5 x 21.6 x 15H
EM-TW-07646200660019.232034.5 x 21.6 x 37.5H
2x EM-TW-07052800660019.239034.5 x 21.6 x 22.5H
EM-TW-07859400660019.240034.5 x 21.6 x 45H
2x EM-TW-07366000660019.240034.5 x 21.6 x 30H


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