High frequency transformers

High frequency Transformers for PCBs for switching converters Flyback, Forward, Resonant, Push-pull ..

High frequency transformers

Elmi manufactures high frequency transformers in all possible combinations.

  • Frequency:
    • working from 20 to 300 kHz.
    • Switching frequency and resonance frequency as per requirement.
  • Cores:
    • ferrite cores
    • any requested shape available on the market: E, ETD, toroid, etc...
  • Shape-typology:
    • in version horizontal, vertical, PTH or SMD.
  • Option for wire:
    • Single or multi-strand enameled wire,
    • Litz wire,
    • Wire in double or triple TIW insulation,
    • Copper flat wire,
    • Insulated copper flat wire,
    • Grade as per IEC60317.
  • Class:
    • Components can be provided in class F or H,
    • with UL certificates on request.
  • Winding:
    • can be linear, on toroid.
    • Creepage and clearing distance primary-secondary as per standards or request,
    • Dielectric insulation between windings: as per requirement.
  • Supports/bobbins:
    • Availability of supports suitable for respecting air gaps and standards required by safety regulations.
    • Bobbin can be provided in all suitable standard to respect standards. Best catalog bobbins, from Europe or China.
  • Applicable standards on request:
    • Flammability: UL94V0, V1or HB,
    • Soldering Compliance according IPC610,
    • Packaging ESD:  as per IEC 61340-5,
    • Storage temperature and HR: usually -40°c +85°c @ 95%,
    • Ionic contamination as per IPC650-2.3.25.

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