Ultraflexx® insulated flexible busbars

Ultraflexx® are insulated, highly flexible busbars made of copper flat braid, which are delivered ready-to-use and thus simplify your assembly process.

Up to 0 mm²
Up to 1 0 mm
Standard length
0. 0 mm
Single wire diameter

Area of application for Ultraflexx® flexible busbars

The Ultraflexx® flexible busbars are highly flexible connectors made of flat copper mesh and reliably absorb vibrations and switching shocks.

The press-welded connections are press-welded over the entire connection cross-section (contrary to the generally available press technology) and can be machined like a solid end piece.

Ultraflexx® are ideal for flexible use of space and are the best alternative to prefabricated cables. Thanks to our different cross-sections, Ultraflexx® can be adapted to a wide range of equipment and used as connectors between various control cabinet modules and units.

Certifications Ultraflexx® flexible busbars

SPS Standard ProdukteSchwanenmühleGmbH is certifiedby DIN EN ISO 9001.

UL 508

IEC 61439-1


Conductor material Ultraflexx®

  • highly flexible flat braids made of Cu-ETP1 with best conductivity

  • Electrical conductivity 58 MS/m

  • Single wire diameter 0.15 mm

  • Cross sections from 25 to 240 mm²
  • Length is defined as hole centre distance
  • Lengths from 150 to 1000 mm, in 50 mm steps

Connections with press-welded connection ends

  • The connection ends can be machined like a solid end piece
  • They are vibration-resistant and allow the lowest contact resistances to pass through
  • Lower power loss and smaller voltage drop
  • No corrosion and thus no deterioration of the connection resistances over time

Ultraflexx® insulation

Ultraflexx® flexible busbars are robustly insulated to withstand high operating voltages:

  • Halogen-free polyolefin tubing, black
  • Wall thickness 0.8 ±0.3 mm
  • Operating temperatures -55° C to +125° C
  • Flame retardant according to UL 224 – VW 1
  • Operating voltage max. 1000 VAC – 1500 VDC
  • Dielectric strength 20kV/mm


Individual wall thicknesses or colours on request!


SPS Ultraflexx

Assembly & Processing Ultraflexx®

Technical details & current carrying capacity

Ultraflexx type designation*:

ULFX [cross section mm²] –
[LA = hole spacing length] –
[D1 / D2 = hole diameter] – [D1 / D2 = hole diameter

SPS Ultraflexx ULFX Typenbezeichnung

Lengths [LA] from 150-1000 mm in 50 mm steps. The length is defined as the hole centre distance.

The current carrying capacity for Ultraflexx® busbars is determined according to the following table in accordance with IEC or UL standards.

Individual diameters D1/D2 at any time on request!

Typenbez. / Type* Querschnitt / Cross section [mm²] Länge / Length LA [mm] Durchmesser / Diameter D1/D2 [mm] Breite / Width B [mm] (± 1) Abstand / Distance RA [mm] Gewicht / Weight [kg/m] Dicke Innen: Anschluss // Thickness inside: connection [mm] Leitertemp. /Conductor temp.[A]* 65 °C Leitertemp./ Conductor temp. [A]* 85 °C Leitertemp./ Conductor temp. [A]* 105 °C
ULFX 25-LA-D1/D2 25 150-1000 8,5/10,5 20 9 0,25 159 210 250
ULFX 50-LA-D1/D2 50 150-1000 8,5/10,5 20 9 0,51 236 311 370
ULFX 100-LA-D1/D2 100 150-1000 10,5/10,5 20 9 1,02 350 462 550
ULFX 120-LA-D1/D2 120 150-1000 10,5/10,5 32 12 1,22 382 504 600
ULFX 240-LA-D1/D2 240 150-1000 10,5/10,5 32 12 2,44 688 908 1.080

* Current load values: ambient temperature 35 °C, alternating current AC. Please use a multiplication factor of 1.72 when using 2 Ultraflexx® and a multiplication factor of 2.25 when using 3 Ultraflexx® in parallel arrangement.

SPS Ultraflexx
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Buy Ultraflexx® 24/7 and as required in the SPS online shop for certified standard connection technology.

Possible SPS assembly

SPS Stern

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