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M3775R Resistive Load Banks Bonitron > Products > Overvoltage > Resistors > M3775R
Fan Cooled Resistor

While Bonitron has been the industry leader for Braking Transistors for years, what better way to compliment that than by offering quality resistors too! Bonitron has a vast standard offering of Braking Resistors and welcomes custom requests as well.

M3775R Braking Resistors are used with Bonitron Braking Transistors to allow full power braking and eliminate overvoltage faults. This permits controlled braking and dramatically shortens motor stopping time. If overvoltage occurs, Bonitron Transistors or the drive's internal brake, shunts excess energy through a Bonitron M3775R Braking Resistor to prevent overvoltage faults.

  • Standard Mill Galvanized Steel
    • 306, 316, etc. Stainless Steel Options
  • NEMA-3R Options
    • (Standard on M3775R Continuous Series)
  • Thermal switch

K9

Peak HP Peak kW Peak Amps Ohms 10% Overhauling (20% Braking) 50% Overhauling Duty Continuous Duty
Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)
230 - 240 VAC | 375VDC
0.5 0.37 1 375 0.04 M3775RK-L0.50A 5.0 x 14.0 x 4.0 0.19 M3775RK-L0.50B 5.0 x 14.0 x 4.0 0.37 M3775RK-L0.50C 5.0 x 14.0 x 4.0
0.75 0.55 2 250 0.06 M3775RK-L0.75A 0.28 M3775RK-L0.75B 5.0 x 14.0 x 7.0 0.55 M3775RK-L0.75C 5.0 x 14.0 x 7.0
1 0.74 2 190 0.07 M3775RK-L1.00A 0.37 M3775RK-L1.00B 0.74 M3775RK-L1.00C 5.0 x 14.0 x 10.0
1.5 1.11 3 125 0.11 M3775RK-L1.50A 0.56 M3775RK-L1.50B 1.11 M3775RK-L1.50C
2 1.5 4 95 0.15 M3775RK-L2.00A 0.75 M3775RK-L2.00B 5.0 x 14.0 x 10.0 1.5 M3775RK-L2.00C
3 2.2 6 63 0.22 M3775RK-L3.00A 1.10 M3775RK-L3.00B 5.0 x 21.0 x 10.0 2.2 M3775RK-L3.00C 5.0 x 28.0 x 13.0
5 3.7 10 38 0.37 M3775RK-L5.00A 5.0 x 14.0 x 7.0 1.85 M3775RK-L5.00B 3.7 M3775RK-L5.00C
7.5 5.5 14 26 0.55 M3775RK-L7.50A 2.75 M3775RK-L7.50B 5.0 x 28.0 x 13.0 5.5 M3775RK-L7.50C
10 7.5 20 19 0.75 M3775RK-L010A 5.0 x 14.0 x 10.0 3.75 M3775RK-L010B 7.5 M3775RK-L010C 11.5 x 29.0 x 18.0
15 11 30 12.6 1.1 M3775RK-L015A 5.0 x 14.0 x 13.0 5.5 M3775RK-L015B 18.5 x 29.0 x 18.0 11 M3775RK-L015C
20 15 39 9.6 1.5 M3775RK-L020A 5.0 x 21.0 x 10.0 7.5 M3775RK-L020B 15 M3775RK-L020C 18.5 x 29.0 x 18.0
25 18 50 7.5 1.8 M3775RK-L025A 9 M3775RK-L025B 18 M3775RK-L025C 25.5 x 29.0 x 18.0
30 22 60 6.3 2.2 M3775RK-L030A 5.0 x 28.0 x 13.0 11 M3775RK-L030B 25.5 x 29.0 x 18.0 22 M3775RK-L030C 32.5 x 29.0 x 18.0
40 30 77 4.9 3.0 M3775RK-L040A 15 M3775RK-L040B 18.5 x 29.0 x 18.0 30 M3775RK-L040C
50 37 96 3.9 3.7 M3775RK-L050A 19 M3775RK-L050B 25.5 x 29.0 x 18.0 37 M3775RK-L050C
60 44 114 3.3 4.4 M3775RK-L060A 11.5 x 29.0 x 18.0 22 M3775RK-L060B 44 M3775RK-L060C 46.5 x 29.0 x 18.0
75 55 139 2.7 5.5 M3775RK-L075A 28 M3775RK-L075B 39.5 x 29.0 x 18.0 55 M3775RK-L075C 60.5 x 29.0 x 18.0
100 75 197 1.9 7.5 M3775RK-L100A 38 M3775RK-L100B 53.5 x 29.0 x 18.0 75 M3775RK-L100C
125 93 234 1.6 9 M3775RK-L125A 18.5 x 29.0 x 18.0 47 M3775RK-L125B 93 M3775RK-L125C Call
150 111 288 1.3 11 M3775RK-L150A 56 M3775RK-L150B Call 111 M3775RK-L150C
200 150 375 1 15 M3775RK-L200A 25.5 x 29.0 x 18.0 See
M3775RL-L200C-3R
to
M3775RL-L600C-3R
--->		 150 M3775RL-L200C-3R Call
250 186 469 0.8 19 M3775RK-L250A 186 M3775RL-L250C-3R
300 223 600 0.6 22 M3775RK-L300A 32.5 x 29.0 x 18.0 223 M3775RL-L300C-3R
400 298 800 0.5 30 M3775RK-L400A Call 298 M3775RL-L400C-3R
600 447 1200 0.32 45 M3775RK-L600A 447 M3775RL-L600C-3R

Note:

  • For NEMA-3R enclosure, add "-3R" to end of model number
  • NEMA-3R standard on M3775RL continuous duty models
  • Standard Mill Galvanized Steel
    • 306, 316, etc. Stainless Steel Options
  • Make sure ohm rating is above transistor minimum ohm rating
Peak HP Peak kW Peak Amps Ohms 10% Overhauling (20% Braking) 50% Overhauling Duty Continuous Duty
Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)
380 - 415 VAC | 620 VDC
62.5 47 75 8.27 5 M3775RK-E063A Call 23 M3775RK-E063B Call 47 M3775RK-E063C Call
125 93 150 4.13 9 M3775RK-E125A 47 M3775RK-E125B 93 M3775RK-E125C
165 123 200 3.1 12 M3775RK-E165A 62 M3775RK-E165B 123 M3775RK-E165C
250 186 300 2.07 19 M3775RK-E250A See
M3775RL-E250C-3R
to
M3775RL-E1330C-3R
---->		 186 M3775RL-E250C-3R Call
500 373 600 1.03 37 M3775RK-E500A 373 M3775RL-E500C-3R
665 496 800 0.78 50 M3775RK-E665A 496 M3775RL-E665C-3R
1000 746 1200 0.52 75 M3775RK-E1000A 746 M3775RL-E1000C-3R
1330 992 1600 0.39 99 M3775RK-E1330A 992 M3775RL-E1330C-3R

Note:

  • For NEMA-3R enclosure, add "-3R" to end of model number
  • NEMA-3R standard on M3775RL continuous duty models
  • Standard Mill Galvanized Steel
    • 306, 316, etc. Stainless Steel Options
  • Make sure ohm rating is above transistor minimum ohm rating
Peak HP Peak kW Peak Amps Ohms 10% Overhauling (20% Braking) 50% Overhauling Duty Continuous Duty
Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)
460 - 480 VAC | 750VDC
0.5 0.4 0.5 1500 0.04 M3775RK-H0.50A 5.0 x 14.0 x 4.0 0.2 M3775RK-H0.50B 5.0 x 14.0 x 7.0 0.4 M3775RK-H0.50C 5.0 x 21.0 x 10.0
0.75 0.6 0.75 1000 0.06 M3775RK-H0.75A 0.3 M3775RK-H0.75B 5.0 x 14.0 x 10.0 0.6 M3775RK-H0.75C 5.0 x 14.0 x 10.0
1 0.7 1 750 0.07 M3775RK-H1.00A 0.4 M3775RK-H1.00B 5.0 x 14.0 x 10.0 0.7 M3775RK-H1.00C 5.0 x 14.0 x 10.0
1.5 1.1 1.5 500 0.11 M3775RK-H1.50A 5.0 x 14.0 x 7.0 0.6 M3775RK-H1.50B 5.0 x 14.0 x 13.0 1.1 M3775RK-H1.50C 5.0 x 21.0 x 10.0
2 1.5 2 375 0.15 M3775RK-H2.00A 0.7 M3775RK-H2.00B 5.0 x 14.0 x 10.0 1.5 M3775RK-H2.00C 5.0 x 21.0 x 10.0
3 2.2 3 250 0.22 M3775RK-H3.00A 5.0 x 14.0 x 4.0 1.1 M3775RK-H3.00B 5.0 x 14.0 x 13.0 2.2 M3775RK-H3.00C 5.0 x 21.0 x 10.0
5 3.7 5 150 0.37 M3775RK-H5.00A 5.0 x 14.0 x 7.0 1.9 M3775RK-H5.00B 5.0 x 21.0 x 13.0 3.7 M3775RK-H5.00C 5.0 x 28.0 x 13.0
7.5 5.6 7.5 100 0.56 M3775RK-H7.50A 5.0 x 14.0 x 10.0 2.8 M3775RK-H7.50B 5.0 x 28.0 x 13.0 5.6 M3775RK-H7.50C 18.5 x 29.0 x 18.0
10 7.5 10 75 0.75 M3775RK-H010A 5.0 x 14.0 x 10.0 3.7 M3775RK-H010B 11.5 x 29.0 x 18.0 7.5 M3775RK-H010C 18.5 x 29.0 x 18.0
15 11 15 50 1.1 M3775RK-H015A 5.0 x 14.0 x 13.0 5.6 M3775RK-H015B 18.5 x 29.0 x 18.0 11 M3775RK-H015C 18.5 x 29.0 x 18.0
20 15 20 38 1.5 M3775RK-H020A 5.0 x 21.0 x 10.0 7.5 M3775RK-H020B 18.5 x 29.0 x 18.0 15 M3775RK-H020C 25.5 x 29.0 x 18.0
25 19 25 30 1.9 M3775RK-H025A 5.0 x 21.0 x 10.0 9.3 M3775RK-H025B 18.5 x 29.0 x 18.0 19 M3775RK-H025C 25.5 x 29.0 x 18.0
30 22 30 25 2.2 M3775RK-H030A 5.0 x 21.0 x 13.0 11.2 M3775RK-H030B 25.5 x 29.0 x 18.0 22 M3775RK-H030C 25.5 x 29.0 x 18.0
40 30 40 19 3.0 M3775RK-H040A 5.0 x 28.0 x 13.0 14.9 M3775RK-H040B 25.5 x 29.0 x 18.0 30 M3775RK-H040C 53.5 x 29.0 x 18.0
50 37 50 15 3.7 M3775RK-H050A 5.0 x 28.0 x 13.0 19 M3775RK-H050B 32.5 x 29.0 x 18.0 37 M3775RK-H050C 39.5 x 29.0 x 18.0
60 45 60 12.6 4.5 M3775RK-H060A 11.5 x 29.0 x 18.0 22 M3775RK-H060B 39.5 x 29.0 x 18.0 45 M3775RK-H060C Call
75 56 75 10 5.6 M3775RK-H075A 11.5 x 29.0 x 18.0 28 M3775RK-H075B 39.5 x 29.0 x 18.0 56 M3775RK-H075C 53.5 x 29.0 x 18.0
100 75 99 7.5 7.5 M3775RK-H100A 18.5 x 29.0 x 18.0 37 M3775RK-H100B 53.5 x 29.0 x 18.0 75 M3775RK-H100C 60.5 x 29.0 x 18.0
125 93 124 6 9 M3775RK-H125A 18.5 x 29.0 x 18.0 47 M3775RK-H125B 60.5 x 29.0 x 18.0 93 M3775RK-H125C Call
150 112 149 5 11 M3775RK-H150A 25.5 x 29.0 x 18.0 56 M3775RK-H150B 60.5 x 29.0 x 18.0 112 M3775RK-H150C 56.0 x 34.0 x 29.0
200 149 199 3.8 15 M3775RK-H200A 25.5 x 29.0 x 18.0 See
M3775RL-H200C-3R
to
M3775RL-H1600C-3R
---->		 149 M3775RL-H200C-3R Call
250 186 249 3 19 M3775RK-H250A 35.0 x 29.0 x 18.0 186 M3775RL-H250C-3R
300 224 298 2.5 22 M3775RK-H300A 35.0 x 29.0 x 18.0 224 M3775RL-H300C-3R
350 261 348 2.2 26 M3775RK-H350A 39.5 x 29.0 x 18.0 261 M3775RL-H350C-3R
400 298 398 1.9 30 M3775RK-H400A 39.5 x 29.0 x 18.0 298 M3775RL-H400C-3R
500 373 497 1.5 37 M3775RK-H500A 60.5 x 29.0 x 18.0 373 M3775RL-H500C-3R
600 447 597 1.25 45 M3775RK-H600A 46.5 x 29.0 x 18.0 447 M3775RL-H600C-3R
800 597 796 0.94 60 M3775RK-H800A 48.0 x 34.0 x 36.0 597 M3775RL-H800C-3R
1200 895 1194 0.63 89 M3775RK-H1200A 36.0 x 62.0 x 36.0 895 M3775RL-H1200C-3R
1600 1193 1591 0.47 119 M3775RK-H1600A-3R Call 1193 M3775RL-H1600C-3R

Note:

  • For NEMA-3R enclosure, add "-3R" to end of model number
  • NEMA-3R standard on M3775RL continuous duty models
  • Standard Mill Galvanized Steel
    • 306, 316, etc. Stainless Steel Options
  • Make sure ohm rating is above transistor minimum ohm rating
Peak HP Peak kW Peak Amps Ohms 10% Overhauling (20% Braking) 50% Overhauling Duty Continuous Duty
Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)
575 - 600 VAC | 940VDC
0.5 0.37 0.4 2000 0.04 M3775RK-C0.50A 5.0 x 14.0 x 4.0 0.19 M3775RK-C0.50B 5.0 x 14.0 x 7.0 0.37 M3775RK-C0.50C 5.0 x 14.0 x 7.0
0.75 0.56 0.6 1500 0.06 M3775RK-C0.75A 0.28 M3775RK-C0.75B 5.0 x 14.0 x 4.0 0.56 M3775RK-C0.75C
1 0.75 1 1200 0.07 M3775RK-C1.00A 0.37 M3775RK-C1.00B 5.0 x 14.0 x 13.0 0.75 M3775RK-C1.00C 5.0 x 14.0 x 13.0
1.5 1.1 1 800 0.11 M3775RK-C1.50A 0.56 M3775RK-C1.50B 5.0 x 14.0 x 10.0 1.1 M3775RK-C1.50C 5.0 x 14.0 x 10.0
2 1.5 2 575 0.15 M3775RK-C2.00A 5.0 x 14.0 x 7.0 0.75 M3775RK-C2.00B 5.0 x 14.0 x 13.0 1.5 M3775RK-C2.00C 5.0 x 21.0 x 13.0
3 2.2 2 400 0.2 M3775RK-C3.00A 1.1 M3775RK-C3.00B 5.0 x 14.0 x 10.0 2.2 M3775RK-C3.00C 5.0 x 21.0 x 10.0
5 3.7 4 235 0.4 M3775RK-C5.00A 1.9 M3775RK-C5.00B 5.0 x 21.0 x 13.0 3.7 M3775RK-C5.00C 5.0 x 28.0 x 13.0
7.5 5.6 6 150 0.6 M3775RK-C7.50A 2.8 M3775RK-C7.50B 5.0 x 28.0 x 13.0 5.6 M3775RK-C7.50C 11.5 x 29.0 x 18.0
10 7.5 8 120 0.7 M3775RK-C010A 5.0 x 14.0 x 10.0 3.7 M3775RK-C010B 11.5 x 29.0 x 18.0 7.5 M3775RK-C010C 18.5 x 29.0 x 18.0
15 11 12 78 1 M3775RK-C015A 5.0 x 14.0 x 13.0 6 M3775RK-C015B 18.5 x 29.0 x 18.0 11 M3775RK-C015C
20 15 16 59 1 M3775RK-C020A 5.0 x 21.0 x 10.0 7 M3775RK-C020B 15 M3775RK-C020C 25.5 x 29.0 x 18.0
25 19 20 47 2 M3775RK-C025A 5.0 x 28.0 x 13.0 9 M3775RK-C025B 19 M3775RK-C025C
30 22 24 39 2 M3775RK-C030A 5.0 x 21.0 x 13.0 11 M3775RK-C030B 22 M3775RK-C030C 32.5 x 29.0 x 18.0
40 30 32 29 3 M3775RK-C040A 5.0 x 28.0 x 13.0 15 M3775RK-C040B 25.5 x 29.0 x 18.0 30 M3775RK-C040C
50 37 41 23 4 M3775RK-C050A 11.5 x 29.0 x 18.0 19 M3775RK-C050B 37 M3775RK-C050C 39.5 x 29.0 x 18.0
60 45 47 20 4 M3775RK-C060A 22 M3775RK-C060B 32.5 x 29.0 x 18.0 45 M3775RK-C060C 53.5 x 29.0 x 18.0
75 56 60 15.6 6 M3775RK-C075A 28 M3775RK-C075B 46.5 x 29.0 x 18.0 56 M3775RK-C075C 46.5 x 29.0 x 18.0
100 75 80 11.7 7 M3775RK-C100A 18.5 x 29.0 x 18.0 37 M3775RK-C100B 75 M3775RK-C100C Call
125 93 101 9.3 9 M3775RK-C125A 47 M3775RK-C125B 60.5 x 29.0 x 18.0 93 M3775RK-C125C
150 112 121 7.8 11 M3775RK-C150A 56 M3775RK-C150B 112 M3775RK-C150C
200 149 159 5.9 15 M3775RK-C200A 25.5 x 29.0 x 18.0 See
M3775RL-C200C-3R
to
M3775RL-C1600C-3R
---->		 149 M3775RL-C200C-3R Call
250 186 200 4.7 19 M3775RK-C250A 186 M3775RL-C250C-3R
375 280 300 3.2 28 M3775RK-C375A 39.5 x 29.0 x 18.0 280 M3775RL-C375C-3R
760 567 600 1.6 57 M3775RK-C760A 60.5 x 29.0 x 18.0 567 M3775RL-C760C-3R
1000 746 800 1.2 75 M3775RK-C1000A Call 746 M3775RL-C1000C-3R
1500 1119 1200 0.78 112 M3775RK-C1500A 1119 M3775RL-C1500C-3R
2015 1503 1600 0.58 150 M3775RK-C2015A-3R 1503 M3775RL-C2015C-3R

Note:

  • For NEMA-3R enclosure,
    add "-3R" to end of model number
  • NEMA-3R Standard on M3775RL Continuous Duty
  • Standard Mill Galvanized Steel
    • 306, 316, etc. Stainless Steel Options
  • Make sure ohm rating is above transistor minimum ohm rating
Peak HP Peak kW Peak Amps Ohms 10% Overhauling (20% Braking) 50% Overhauling Duty Continuous Duty
Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)		 Cont. kW Resistor Model Number Dimensions"
(H x W x D)
690 VAC | 1090VDC
110 82 75 15 8 M3775RK-Y110A Call 41 M3775RK-Y110B Call 82 M3775RK-Y110C Call
220 164 150 7.5 16 M3775RK-Y220A 82 M3775RK-Y220B 164 M3775RL-Y220C-3R Call
300 224 200 5.5 22 M3775RK-Y300A 112 M3775RK-Y300B 224 M3775RL-Y300C-3R
440 328 300 3.6 33 M3775RK-Y440A See
M3775RL-Y440C-3R
to
M3775RL-Y2300C-3R
---->		 328 M3775RL-Y440C-3R
875 652 600 1.95 65 M3775RK-Y875A 652 M3775RL-Y875C-3R
1170 872 800 1.4 87 M3775RK-Y1170A 872 M3775RL-Y1170C-3R
1750 1305 1200 0.91 130 M3775RK-Y1750A-3R 1305 M3775RL-Y1750C-3R
2300 1715 1600 0.68 172 M3775RK-Y2300A-3R 1715 M3775RL-Y2300C-3R

Note:

  • For NEMA-3R enclosure,
    add "-3R" to end of model number
  • NEMA-3R Standard on M3775RL Continuous Duty
  • Standard Mill Galvanized Steel
    • 306, 316, etc. Stainless Steel Options
  • Make sure ohm rating is above transistor minimum ohm rating
Braking conditions can be sorted into 3 basic
types as they relate to most industrial applications.		 Overhauling Duty
  • Deceleration
    • During deceleration, the braking resistor is used to stop or reduce the speed of the motor. The required braking torque reduces with speed, therefore approximately one-half the power of an overhauling load cycle is required of the braking resistor. Most drives require braking resistors only for stopping.
  • Eccentric
    • For some applications braking resistors are required because of torque or load fluctuations while the speed remains constant. Some examples of this are tumblers, punch presses and pump jacks.
 Overhauling Duty
  • Overhauling
    • During an overhauling load cycle the braking resistor keeps the motor speed from increasing beyond the speed set by the drive. The required braking torque remains constant, therefore approximately twice the power of a deceleration braking cycle is required of the braking resistor.
 Overhauling Duty
Custom Resistors are available. Call us at 615-244-2825 or click here to request information.
Made in the United States of America
 
 
 
 
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Phone: 615-244-2825 | Fax: 615-244-2833 | info@bonitron.com
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