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Winding wire

SHTherm® 210 Flat

  • Enamelled flat copper wire, thermoresistant
  • Polyesterimide overcoated with
  • polyamide-imide enamel
  • Class 200/220

SHTherm® 210 Flat is a highly thermoresistant rectangular enamelled copper wire of heat performance class N with a wide range of excellent quality features. Its insulation film consists of 2 different coatings on top of one another. These ensure a very good permanent thermal and overload resistance, excellent resistance against mechanical stress, as well as an excellent resistance to chemical attacks of commercial washing and cleaning agents, impregnating varnishes and resins, sealing compounds, thinners, solvents and refrigerants, oils as well as their vapours. This range of excellent features make SHTherm® 210 Flat an all-round wire meeting the requirements of all applications with above average requirements to processing and operational features or operational safety in electrical systems.
The consistent further developments carried out by our R&D team allow this excellent “all-round” wire to be optimised to take into account specific customer requirements (e.g. improved adhesion after ageing, workability, electrical characteristics).


E-mobility, electric motors, generators, transformers, hybrid constructions


IEC / DIN EN 60317-29
NEMA MW 36-C/ MW 38-C
UL approved

Delivery forms

Grade 1: on request
Grade 2:
width: 2.000 - 20.000 mm
thickness: 0.800 - 5.000 mm

Technical data

Typical properties of enamelled flat copper wire 5.60 x 3.55 mm, with insulation film grade 2

Width with varnish  Bare wire width  Thickness with varnish  Bare wire thickness  Varnish increase  Elongation and adhesion  Elongation and adhesion (no cracks in varnish after winding) - bend over width  Elongation and adhesion (no cracks in varnish after winding) - bend over thickness  Elongation and adhesion (no cracks in varnish after winding) - elongation  Pencil hardness of varnish  Elongation at break 
Unit of measure Set value  Actual value 
mm  5.67 - 5.82 as set value
mm  5.550-5.650 as set value
mm  3.62 - 3.77 as set value
mm  3.500-3.600 as set value
μm  120 - 170 as set value
  mandrel diameter  
  4 x width 3 x width
  4 x thickness 3 x thickness
  15 % with cracks < 1 x width 32 % without cracks
  H 4H - 5H
≥ 32 ≥ 38
Temperature index  Heat shock at 220 °C (no cracks in varnish coat after winding)  Solderability 
Unit of measure Set value  Actual value 
°C  200/220 210/220
  mandrel diameter: 6 x thickness mandrel diameter: 4 x thickness
  no no
Dielectric strength RT  High voltage discontiniuties 750V  Electrical conductivity of Cu conductor 
Unit of measure Set value  Actual value 
kV  ≥ 2.0 (ball pit) ≥ 3 (ball pit)
  / ≤ 7 on 100 m
MS/m  58 - 59 ≥ 58.5
Pencil hardness (storage in standard solvent ½ h / 60 °C)  Pencil hardness (storage in alcohol ½ h / 60 °C)  Resistance to commercial impregnants^(1)  Resistance to commercial refrigerants^(1)  Resistance to dry transformer oils^(1)  Resistance to hydraulic oils^(1) 
Set value  Actual value 
min. H 3H - 5H
min. H 3H - 5H
/ yes
/ yes
/ yes
/ yes

(1) Due to the variety of individual applications we cannot make any generally binding commitments regarding the compatibility. We recommend testing compatibility with the materials being used.