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Power wirewound resistors

The assortment of power wirewound resistors includes Al housed wirewound resistors, cemented wirewound resistors and resistor assemblies with protection IP 20 and IP 54. The assortment is described in the following summary, detailed information are described in the PDF catalogues.

Wire-wound power resistors, Al housed, braking


Wire-wound power resistors (braking) TESLA in Al case are designed of the resistance spiral sealed into the ceramic tube using the insulating filler. Furthermore the ceramic tube is embedded into the Al case serving as a heat sink and a way of mounting. For high loads the resistor can be mounted on additional heat sink. For outlet are used cables with copper core. Sorted types are certified by UL.
Power wirewound resistors - Al case, 10 - 30 W (30 - 90 W)
Load Type L1 (mm) L2 (mm) L3 (mm) Rated resistance Tolerance
10 W / 30 W TR 340 40 30 5 0R8...51R ±5%
15 W / 45 W TR 341 55 25 15 0R9...56R ±5%
20 W / 60 W TR 342 77 47 15 1R5...110R ±5%
30 W / 90 W TR 343 104 64 20 2R2...160R ±5%
20 W / 60 W TR 323 120 60 30 3K9 ±5%
load at 25 °C: 10 W / 30 W - nominal load for ED=100% / nominal load with additional heat sink, ED – load factor = percentual ratio of switch-on time against cycle period up to 120 s.
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resistor TR 340

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resistors TR 341 - 343
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resistor TR 323
Power wirewound resistors - Al case, 30 - 45 W (100 - 150 W)
Load Type L1 (mm) L2 (mm) Rated resistance Tolerance
30 W / 100 W TR 311 120 60 2R4...180R ±5%
30 W / 100 W TR 311/A 120 60 2R0...130R ±5%
40 W / 125 W TR 312 165 105 3R9...300R ±5%
40 W / 125 W TR 312/A 165 105 3R0...220R ±5%
45 W / 150 W TR 313 180 120 4R3...300R ±5%
45 W / 150 W TR 313/A 180 120 3R3...240R ±5%
load at 25 °C: 30 W / 100 W - nominal load for ED=100% / nominal load with additional heat sink, ED – load factor = percentual ratio of switch-on time against cycle period up to 120 s.
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resistors TR 311-313

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resistors TR 311A-313A
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Power wirewound resistors - Al case, 45 - 120 W (150 - 600 W)
Load Type L1 (mm) L2 (mm) Rated resistance Tolerance
45 W / 150 W TR 314 90 79 1R6...180R ±5%
60 W / 200 W TR 315 105 94 2R2...240R ±5%
70 W / 300 W TR 316 155 144 4R7...430R ±5%
80 W / 400 W TR 317 200 189 6R8...620R ±5%
100 W / 500 W TR 318 260 249 9R1...910R ±5%
120 W / 600 W TR 319 320 309 12R...1K2 ±5%
load at 25 °C: 45 W / 150 W - nominal load for ED=100% / nominal load with additional heat sink, ED – load factor = percentual ratio of switch-on time against cycle period up to 120 s.
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resistors TR 314-319
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Power wirewound resistors - Al case, 45 - 120 W (150 - 600 W)
Load Type L1 (mm) L2 (mm) Rated resistance Tolerance
45 W / 150 W TR 331 72 40 1R6...180R ±5%
60 W / 200 W TR 332 87 55 2R2...240R ±5%
70 W / 300 W TR 333 137 85 4R7...430R ±5%
80 W / 400 W TR 334 182 100 6R8...620R ±5%
100 W / 500 W TR 335 242 160 9R1...910R ±5%
120 W / 600 W TR 336 302 220 12R...1K2 ±5%
load at 25 °C: 45 W / 150 W - nominal load for ED=100% / nominal load with additional heat sink, ED – load factor = percentual ratio of switch-on time against cycle period up to 120 s.
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resistors TR 331-336
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Power wirewound resistors - Al case, 75 - 300 W (150 - 600 W)
Load Type L1 (mm) L2 (mm) Rated resistance Tolerance
75 W / 150 W TR 351 80 56 2R2...220R ±5%
100 W / 200 W TR 352 110 86 3R6...390R ±5%
150 W / 300 W TR 353 163 139 5R6...560R ±5%
200 W / 400 W TR 354 216 192 7R5...820R ±5%
250 W / 500 W TR 355 270 246 10R...1K ±5%
300 W / 600 W TR 356 300 276 11R...1K1 ±5%
load at 25 °C: 75 W / 150 W - nominal load for ED=100% / nominal load with additional heat sink, ED – load factor = percentual ratio of switch-on time against cycle period up to 120 s.
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resistors TR 351-356
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Wire-wound power resistors, cemented


Wire-wound power resistors TESLA are made of the resistance spiral wound on ceramic tube and terminated by metal clips with connector. The resistor body is protected by high-temperature cement. The resistors are supplied with various holders. All resistor types can be eqquiped with setting cap (marked TRR).
Power wirewound resistors - cemented 15 - 100 W
Load W Type L1 (mm) Dmax (mm) Rated resistance Tolerance
15 TR 260.2 50±0.6 17 0R8-12K ±5%, ±10%
20 TR(R) 260 60±0.8 17 0R9-15K ±5%, ±10%
30 TR(R) 261 80±1.4 17 1R5-22K ±5%, ±10%
40 TR(R) 262 100±1.8 17 1R8-22K ±5%, ±10%
30 TR(R) 265 55±0.6 24 1R0-16K ±5%, ±10%
50 TR(R) 266 80±0.8 24 1R8-27K ±5%, ±10%
75 TR(R) 267 120±1.4 24 3R0-51K ±5%, ±10%
100 TR(R) 268 164±3 24 4R7-68K ±5%, ±10%
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resistor TR 26x

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resistor TRR 26x
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Power wirewound resistors - cemented 75 - 1300 W
Load W Type L1 (mm) Dmax (mm) Rated resistance Tolerance
75 TR(R) 301 100±1.8 35 0R4-47K ±5%, ±10%
100 TR(R) 302 135±2.5 35 0R6-82K ±5%, ±10%
150 TR(R) 303 200±3.8 35 0R9-110K ±5%, ±10%
200 TR(R) 304 275±4.6 35 1R2-120K ±5%, ±10%
200 TR(R) 305 130±3 47 0R7-82K ±5%, ±10%
300 TR(R) 306 182±3.4 47 1R0-120K ±5%, ±10%
400 TR(R) 307 250±4.2 47 1R5-160K ±5%, ±10%
500 TR(R) 308 310±5 47 2R6-200K ±5%, ±10%
750 TR(R) 309 390±5.5 68 3R6-130K ±5%, ±10%
1000 TR(R) 310 515±6.8 68 4R7-180K ±5%, ±10%
1300 TR(R) 320 660±6.8 68 6R2-180K ±5%, ±10%
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resistor TR 3xx

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resistor TRR 3xx
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Resistor assemblies - wire-wound, power, protection IP 54, IP 20


Protection IP 20: the resistors of TR 307, TR 308, TR 309, TR 310, TR 320 series (wirewound power resistors cemented) are fixed in cases from zinc plated steel sheet with terminal board and cable bushing. The case can be equipped with thermoswitch connected to the terminal board. Electrical connection is provided by clamp allowing to attach the wires up to 4 sqmm. Protection IP 54: the set of Al housed power resistors (2 or 4 pcs of TR319, TR 355, TR 356 resistors) are mounted on stainless-steel base. Electrical connection is provided by a clamp allowing to attach the wires up to 4 sqmm. Used resistors are designed to meet the specific demands on pulse load capacity of the set - adiabatic impulse in kJ. Resistor assemblies with protection IP 20, IP 54 are manufactured as a custom products according to customer requirements.
Wire-wound power resistors, assemblies 240 - 5000 W
Load Protection Type Adiab. impulse Resistance Weight
240 ... 1 200 W IP 54 2TR 319 1 ... 18 kJ 2R7...4K3 2.6...4.9 kg
...4TR 356
400 ... 5 000 W IP 20 1TR 307S 8 ... 80 kJ 5R...100R 1.9...11 kg
...2TR 320S
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assembly IP 54
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assemblies IP 20

Film resistors

The assortment of film resistors includes high ohmic resistors.

Film resistors - high ohmic
Load W Type Bmax (mm) Cmax (mm) Rated resistance Tolerance
1 3WK 680 06 27 9 M1-10G ±5%, ±10%
3 3WK 680 08 52 15 M1-10G ±5%, ±10%
6 3WK 680 09 96 17.5 M1-10G ±5%, ±10%
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resistor 3WK 680 0x
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PDF catalogues

You can download electronic catalogs in Excel and PDF format.
File File description

    rezistory-resistors-2018.pdf (4771 kB)

 New summary of TESLA resistors, edition October 2018.
 

    rezistory-vykonove-resistors-power.pdf (7573 kB)

 Detailed data for wire-wound power resistors cemented, series TR 26x, TR 30x, TR 310, TR 320, resistors TR 409-TR 420 - oxidized wire and data for resistors assemblies.
 

    rezistory-vysokoohmove-resistors-high-ohmic.pdf (379 kB)

 Detailed data for high-ohmic resistors.
 

    rezistory-brzdne-alpouzdro-resistors-braking-alcase.pdf (5270 kB)

 Detailed data for Al housed wire-wound power resistors (braking resistors), series TR31x, TR33x, TR 35x, TR 34x and for assemblies of resistors in Al case, protection IP 54 (IP 20).
 
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