Electrical Insulation Guides
Use these guides to compare insulation tubes and sleeves by material, construction, operating conditions and manufacturability.
Material families
Core topics include Mylar/PET film tubing, polyimide tubing, Nomex/aramid paper tubes, PEEK tubing, fiberglass sleeving and machined insulation components.
Selection inputs
- Operating and short-duration temperature
- Voltage and dielectric verification
- ID, OD, wall, length and tolerance
- Chemical, moisture and abrasion exposure
- Assembly method and required flexibility
Specialist resources
For current product capabilities, see WELLELE Tubing and WELLELE Electrical Insulation Materials. These are commercially related websites; verify every specification against the current product page and approved documentation.
Electrical insulation engineering resources
Use this resource center to move from an application requirement to a defensible insulation-tube specification. The guides focus on dielectric duty, operating temperature, mechanical loading, moisture, geometry, machining and supplier validation. Material names alone are not treated as proof of fitness; final selections should be confirmed in the finished assembly and under representative service conditions.
Recommended guides
- How to select an electrical insulation tube material: 7 engineering checks
- Fuse body tube materials compared
- EV/HEV high-voltage fuse tube specification inputs
- Heat-shrink tubing material and installation guide
For an RFQ, record the application, electrical duty, temperature range, dimensions and tolerances, mechanical loads, environmental exposure, required standards, test method and expected order volume.
New tubing guides
Selection checklist
Use this checklist to move from an application to a defensible insulation-tube specification:
- Electrical duty: working voltage and dielectric strength for the finished assembly, not a coupon.
- Temperature class: continuous and short-duration temperature, including any reflow or sterilization exposure.
- Material family: Mylar/PET, polyimide, Nomex/aramid, PEEK, fiberglass sleeving or a machined component, matched to flexibility and chemical exposure.
- Geometry: ID, OD, wall, length and tolerance, plus how dimensions are measured (free state vs installed).
- Environment: moisture, chemical, UV and abrasion exposure at the installation site.
- Assembly: method of application and any flexibility required after installation.
- Verification: standards, test method and inspection records accepted before release.