ETD34 PCB Mount Ferrite Core 380v To 24v HF Power Transformer For UPS And Inverters
The ETD34 horizontal transformer is a custom-wound high frequency transformer built on an ETD34 ferrite core with a horizontal (low-profile) bobbin, designed for switching power supplies and power conversion circuits. The horizontal pin layout keeps the overall board height low and allows the component to sit flat on the PCB, which suits slim enclosures and boards with limited vertical clearance.
Turns ratio, inductance, pin configuration, creepage distance, wire type (enamelled copper, triple insulated wire or Litz wire) and insulation class are all engineered to the customer's schematic rather than sold as a fixed catalogue item. Typical operating frequency ranges from 20 kHz to 200 kHz, and the achievable output power depends on the winding design, cooling condition and topology used.
Every unit is produced in our own Dongguan factory under an ISO 9001 quality system, with electrical testing on 100% of finished goods.
| ETD34 Horizontal Transformer Specification & Customization Guide | ||
| Product Detail Page Technical Reference - Full OEM/ODM Customization Supported | ||
| Key Parameter | Standard Range | Customization Available (OEM/ODM) |
|---|---|---|
| Core Type & Material | ETD34 ferrite core, PC40 / PC44 | N87 / N97 / PC95 low-loss or high-Bs material on request |
| Core Size & Effective Area | 34.7 x 17.3 x 11.4 mm, Ae approx. 97.1 mm2 | ETD29 / ETD39 / ETD44 alternatives for higher or lower power |
| Bobbin & Structure | Horizontal bobbin, 5+5 or 6+6 pins, UL94V-0 phenolic / PBT | 4+4 to 8+8 pins, custom pin pitch, base height and pin length |
| Output Power Range | 50 W - 200 W at 100 kHz (design dependent) | Up to 300 W with interleaved winding / forced air cooling |
| Operating Frequency | 20 kHz - 200 kHz | Up to 500 kHz with Litz wire and low-loss core material |
| Primary Inductance (Lp) | 200 uH - 2.5 mH, tolerance +/-10% | 50 uH - 10 mH, tight tolerance +/-5% or +/-3% |
| Leakage Inductance | Less than 2% of Lp | Less than 1% with sandwich winding structure |
| Turns Ratio & Windings | Built to customer schematic, up to 4 secondary windings | Multi-output, auxiliary and bias windings freely configured |
| Winding Wire | Class 155 enamelled copper wire | Triple insulated wire (TIW), Litz wire or copper foil |
| Insulation Class | Class B (130 C) / Class F (155 C) | Class H (180 C) for high ambient temperature designs |
| Isolation / Hi-Pot | 3000 VAC / 1 min, primary to secondary | 4000 - 5000 VAC reinforced isolation, extended creepage |
| Air Gap | Centre leg gap 0.1 - 1.5 mm for flyback energy storage | Ungapped or precision gap tailored to target AL value |
| Operating Temperature | -40 C to +130 C | Extended range with high-temperature bobbin and varnish |
| Mounting / Termination | Through-hole horizontal PCB mounting | SMD base, flying leads, connector or bracket versions |
| Compliance & Testing | RoHS, UL94V-0 materials, 100% LCR and hi-pot test | UL / CE / CB documentation support for project qualification |
| MOQ & Sampling | MOQ 1,000 pcs, samples in 7 - 10 days | Pilot run quantities and dedicated tooling for OEM projects |
- ETD34 ferrite core with horizontal bobbin, providing a low-profile footprint for height-restricted PCB layouts
- Wide winding window and generous core cross-section, allowing higher copper fill and reduced winding loss compared with smaller EE or EFD frames of similar power class
- Suitable for flyback, forward, half-bridge, full-bridge and LLC resonant topologies
- Selectable insulation solution: margin tape construction or triple insulated wire for reinforced isolation; Litz wire available to control skin and proximity effect at higher frequencies
- Configurable primary-to-secondary isolation voltage, leakage inductance and inductance tolerance according to the customer's specification
- Optional gapped core for defined energy storage in flyback designs, with gap accuracy controlled in production
- Materials available to UL 94V-0 flame-retardant grade and RoHS requirements; varnish impregnation used to reduce audible noise and improve moisture resistance
- Custom pin count, pin pitch, bobbin type and safety spacing to match existing PCB footprints
- Industrial control equipment: PLC power modules, sensor power supplies, drive and automation cabinets
- Renewable energy systems: solar inverters, energy storage converters, battery management and charging modules
- Communication and IT power: base station power units, network equipment adapters, server auxiliary supplies
- LED lighting drivers and constant-current power modules
- Home appliance and commercial equipment power boards, including coffee machines, vending machines and small motor control units
- Medical and instrumentation power supplies requiring reinforced isolation and stable electrical performance
- General purpose AC-DC and DC-DC switch mode power supplies in the tens to low hundreds of watts range, depending on design conditions
- Established in 2000 with 26 years of focus on magnetic components, serving industrial control and power electronics customers
- Self-owned 10,000 square metre manufacturing base in Dongguan with 8 complete production lines, supporting stable lead times and repeatable quality
- Engineering-led cooperation: a 20-person R&D team works with customers from schematic review and sample building through to mass production
- 20-person QC team and full certification framework: ISO 9001 and ISO 14001 system certification, with CE, CB, UL, cUL and RoHS product certification available
- Proven export record of USD 42 million per year, shipping to North America (50%), Northern Europe (18%), South America (15%) and Southeast Asia (15%), including OEM customers such as Midea and Federal Signal
- Flexible commercial terms: MOQ from 1,000 pcs, DDP and DDU shipping supported, direct factory delivery from China
- Fully customised design instead of a standard part: the transformer is matched to your controller IC, input voltage range and output requirements
- Low-profile horizontal structure saves board height and simplifies mechanical assembly in thin power adapters and embedded modules
- Controlled leakage inductance and balanced winding arrangement help lower voltage spikes, switching loss and EMI in the finished power supply
- Consistent gap and winding process reduce inductance drift between batches, keeping loop behaviour predictable in mass production
- Safety-oriented construction with reinforced isolation options supports customer certification work in export markets
- Sample and pilot-run support before mass production, with electrical parameters verified against the agreed specification sheet
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Q1: How long does it take to get a sample?
A1: 3-5 working days for new custom samples; 1 day if the sample is in stock.
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Q2: Who pays the shipping cost for samples?
A2: The freight cost is covered by the customer. We will help you compare couriers and choose the most economical shipping way.
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Q3: Can you provide technical support for customized products?
A3: Yes. Our in-house R&D team offers free technical support based on your specific requirements. We can customize input & output voltage, power, inductance, dimensions, core material, wire material, pin configuration and more.
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Q4: Can you accept a flexible MOQ?
A4: Yes, we can be flexible with MOQ depending on your industry and the type of product you need. Could you tell us the application of the product and your estimated annual usage? We will then confirm the most suitable MOQ and price for you.
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Q5: If I have a large quantity of goods that need to be shipped by sea, can you ensure proper packaging and protection for them?
A5: Yes. Goods are packed in strong export cartons, stacked on wooden pallets and shrink-wrapped, so they stay protected during long sea transport.
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Q6: What is your normal lead time for mass production?
A6: Standard lead time is about [15-25] days after order confirmation, depending on quantity and product complexity. For urgent projects, please tell us your target date and we will check the production schedule for you.
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Q7: What certifications do you have?
A7: Our factory is certified to ISO 9001 and ISO 14001. Our products can be supplied to CE, CB, UL, cUL and RoHS requirements. We can also support the documents you need for your own certification.
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Q8: What payment terms do you accept?
A8: We accept T/T, Paypal, or Western Union. Sample orders are paid in full in advance; for bulk orders the terms can be discussed based on order value and cooperation history.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.