At the Backer Group, we can offer a wide range of technologies for the production of resistors. An advantage with resistors from Backer is that they can withstand high loads, since we use large diameter resistance wires that provide low resistance. The option of using water/liquid as cooling media enables high power resistance. We also have large element diameters, for higher voltages.

All resistors are custom made, but our standard concept speeds the development process. The elements are fully tested for insulation and dielectric rigidity. Moreover, the elements are often built into protective cages to prevent contact with heated parts. Computerized load simulation is also performed to optimize each resistor application.

Terminal boxes with different IP classes can be used. Numerous elements are often connected together, in series and/or parallel, to achieve the intended properties.

Technical data


Steel - Grade D
Stainless steel - EN 1.4301, EN 1.4404, UNS S31254, UNS N08904, Incoloy 800, Incoloy 825
Aluminum AA6060, AA6063

Types of cooling

Air: convection or forced convection
Liquid: water, oil etc.


Tubular elements: Ø 8.5, 14, 21 mm
zinc-aluminum alloy section I- or X- shaped, with or without cooling fins

Attachment of elements

Flanges: welded or brazed
Nipples: pressed or brazed


Threaded pins M4/M6

Ø 8.5mm alu-section

Ø 14mm alu-section

Ø 18mm alu-section

Ø 21mm alu-section

Min. resistance/ element

0.12 ohm/m

0.06 ohm/m

1.6 ohm/m

1.5 ohm/m

Resistance tolerance

± 5%

± 5%

± 5%

± 5%

Dielectric strength

1.5 kV DC
1 minute

4 kV DC
1 minute

7 kV DC
1 minute

9 kV DC
1 minute


300-6000 mm

300-6000 mm

300-1500 mm

300-1500 mm

Min. bending radius

12.5 mm

25 mm

40 mm

60 mm


0.5-1 µH/element

Example applications

  • Trains
  • Hybrid vehicles
  • Wind power turbines
  • Ships
  • Cranes
  • Trams
  • Frequency converters
  • Sine-wave filter resistors
Wind turbines

Product examples

  • Brake resistors
  • Power resistors
  • Load resistors
  • Shunt resistors
  • Water-/liquid cooled resistors

Other resistors

Other resistors - a wide product range

The Backer Group, specializes in electrical resistors and brake resistors. We are known worldwide for our high quality design and resistor production for electro, mechanic-, wind power and telecom for example.

Among our products:

  • Resistors in aluminum housings
  • Ceramic wire-wound resistors
  • Open wire-wound resistors
  • Rheostats
  • Steel grid resistors

BACKER AB · FABRIKSGATAN 11 · 282 71 SÖSDALA · TEL: +46 (0)451-66100 · [email protected] · Corp. reg: 5560530569


Copyright © 2017 Backer AB