Transformer Bobbin ✉, is a critical structural component of a transformer, providing mechanical support and electrical insulation for the winding coils.SHINHOM transformer bobbins are compatible with a wide range of ferrite core types, including EE, EF, EFD, EPC, PQ, UU, EC/EER/ER, RM, POT, DR, and EI series, as well as toroidal core mounting bases and ferrite rods.
Manufactured from thermoplastic materials (such as Nylon, PET, and PBT) or thermosetting materials (such as phenolic resin (PM)), these bobbins offer excellent electrical insulation, high thermal resistance, and outstanding mechanical strength. They are widely used in high-frequency transformers, switch mode power supply (SMPS) transformers, LAN transformers, and inductors.
Features
- 13 core series compatible – EE, EF, EFD, EPC, PQ, UU, EC/EER/ER, RM, POT, DR, EI, toroidal base, and ferrite rod
- Multiple material options – NYLON, PET, PBT (thermoplastic) & Phenolic PM (thermosetting)
- Temperature range – 115°C to 170°C (PM up to 150°C, withstands 370°C peak)
- Structural types – Vertical, horizontal, multi-combination, drawer type
- Flame-retardant rating – UL94 V-0
- High stability – Resistant to deformation with precise dimensions
- Surface finish – Smooth or matte finish options
| Product Series | 1. BASE ✉ | 2. EE Horizontal ✉ | 3. EE Vertical ✉ | 4. EEL ✉ |
| 5. EM ✉ | 6. EFD ✉ | 7. EI ✉ | 8. EP ✉ | |
| 9. EQ ✉ | 10. ER ✉ | 11. EPC ✉ | 12. LP,GU,EVD,ATQ ✉ | |
| 13. RM ✉ | 14. POT ✉ | 15. ETD ✉ | 16. PQ ✉ |
Applications
- High-Frequency Transformers – EE, EF, ER bobbins
- LAN Transformers – RM and EPC bobbins
- Inductors & Chokes – Toroidal and DR bobbins
- LED Drivers – EFD and PQ bobbins
- Automotive Electronics – High-temperature PM bobbins
- Telecommunication Equipment – POT and RM bobbins
FAQ
Q: How do I choose the right transformer bobbin material?
A: Select the bobbin material according to the operating temperature and application requirements. For high-temperature environments (>130°C), phenolic resin (PM) is recommended. For general applications, PET (up to 170°C) or Nylon (up to 115°C) are suitable choices. Nylon is preferred when excellent oil resistance is required.
Q: How is the fit between the bobbin and the ferrite core ensured?
A: The bobbin dimensions are precisely designed in accordance with the specifications of the corresponding ferrite core series, ensuring a secure fit with EE, EF, EFD, PQ, and other core types. This guarantees proper magnetic circuit alignment and reliable electrical performance.
SHINHOM is dedicated to setting a high bar of excellence for industries that integrate or utilize magnetics technologies in our Transformer Bobbin products.
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