EPC patch Type Miniature pulse current transformer Ferrite PCB module thin AC-DC power transformer
EPC25
EPC25 horizontal high-frequency transformer, using manganese zinc ferrite EPC25 magnetic core, 6+5Pin multi pin skeleton structure, PCB horizontal plug-in installation.
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Compact flat structure, low mounting height, saves overall space, supports multiple winding designs Support the selection of three-layer insulated wires, with a complete set of compliance documents including CE DoC, FCC Part 15B, RoHS2.0, REACH SVHC, to meet European and American machine safety regulations and EMC certification.
Product parameters
| Magnetic core material | PC40/PC44 manganese zinc ferrite optional | Working frequency | 50kHz~200kHz |
| Recommended power range | 20~40W | Working temperature | -25 ℃~+125 ℃ |
| skeleton | UL94-V0 flame retardant PBT | Winding wire pure copper | enameled wire/three-layer insulated wire optional |
| Optional process | includes Mara tape and vacuum dipping paint | Inductance tolerance | ± 5%/± 10% can be selected as needed |
| Brand | CXWON | PIN | 6+5 pin |
| Cooling Type | Dry Type | Cooling Method | Oil-immersed Self-cooled Type |
Main transformer models：
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Core advantages of EPC transformer
1. EPC25 flat horizontal magnetic core, with a low height of the mounting plate, suitable for thin power supply products, saving PCB vertical space.
2. 6+5PIN multi-pin frame, with clear pin zoning, supporting multi-output + auxiliary power winding design.
3. Fully copper-wound coils, with low DC resistance DCR, resulting in higher power conversion efficiency.
4. Three-layer insulated wires can be selected, simplifying the overall safety design of the product, making it easier to pass EN61558 safety certification.
5. Optimized winding process, strictly controlling leakage inductance, reducing voltage spikes, minimizing EMI interference, and facilitating CE/FCC EMC testing
EPC transformer real-shot details：
Typical application scenarios
Flowchart
Company Information:
FAQ
Q: What are the pin definitions for EPC25 6+5PIN?
A: The frame is a 6+5-pin structure. The 6 pins are on the primary side and the 5 pins are on the secondary side. It supports multiple outputs and auxiliary windings. The pin zones are isolated for convenient PCB routing.
A: The frame is a 6+5-pin structure. The 6 pins are on the primary side and the 5 pins are on the secondary side. It supports multiple outputs and auxiliary windings. The pin zones are isolated for convenient PCB routing.
Q: How to select between EPC25 magnetic core PC40 and PC44?
A: PC40 has a higher cost-performance ratio and is the preferred choice for general applications; PC44 has lower high-frequency loss and is suitable for high-frequency designs above 150kHz. It performs better in temperature rise under high-temperature conditions and has a slightly higher cost.
Q: How much leakage inductance is generally controlled for EPC25 high-frequency transformers?
A: Under normal processes, it is controlled at 1.5% to 3.5% of the primary inductance; for EMI strict projects, the winding structure can be optimized to 1% to 2%, reducing conducted interference.
Q: Can EPC25 be coated with varnish? What are the advantages and disadvantages of coating?
A: Vacuum coating is supported. Advantages: Suppresses coil buzzing noise, prevents moisture, and resists vibration; Disadvantages: The cost increases slightly.
Q: Can the tolerance of EPC25 inductance be ±5%?
A: Yes, by default it is ±10%. The high-precision version supports ±5%, suitable for switching power supplies with high requirements for loop stability.
