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Winding wire

SHTherm® 220

  • Enamelled round cu.wire, thermo-resistant,
  • Insulated with polyamide-Imide
  • Class 220

"SHTherm® 220" is a highly thermo-resistant enamelled copper wire with heat performance class R with superior thermal, chemical and mechanical resistance. It is used for special applications requiring the following criteria: very high permanent thermal resistance and short-time thermal overload, very good resistance to aggressive mediums in liquid or gas form.

"SHTherm® 220" is ideally suited for use in special safety-relevant and electrical life support equipment. Sophisticated process  technology and process setting ensure easy mouldability, good elongation and constant insulation properties of these wires.


Control gears, electric motors, electrical tools, pump drives, refrigerators, special applications in the medical field


IEC / DIN EN 60317-26
UL approved

Delivery forms

Grade 1: on request
Grade 2: on request

Technical data

Typical properties of enamelled round copper wire 0.500 mm, with insulation film grade 1

Outer diameter with varnish  Bare wire diameter  Elongation and adhesion  Scrape resistance  Pencil hardness of varnish  Elongation at break  Coefficient of friction 
Unit of measure Sollwert  Istwert (typ.) 
mm  min. 0.524 - max. 0.544 as set value
mm  0.495-0.505 as set value
  mandrel diameter: 0.500 mm 1 x d /10 % pre-elongation
≥ 3.950 ≥ 7.500
  / 4H - 6H
≥ 28 ≥ 38
µ  / ≤ 0.140
Temperature index TI  Cut through temperature (pre-heated block)  Dielectric loss factor (bending point)  Heat shock at 220 °C (no cracks in varnish coat after winding)  Solderability 
Unit of measure Sollwert  Istwert (typ.) 
  220 220
°C  350 ≥ 400
(°C) (tan δ)  / ≥ 240
  mandrel diameter: 1.120 mm 1 x d /10 % pre-elongation
  no no
Dielectric strength RT  High voltage discontiniuties 750V  Electrical conductivity 
Unit of measure Sollwert  Istwert (typ.) 
kV  ≥ 2.4 (twist) ≥ 5 (cylinder)
  ≤ 10 on 30 m ≤ 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) 
Sollwert  Istwert (typ.) 
min. H 4H - 6H
min. H 4H - 6H
/ 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.