Description
ETD59 Horizontal MnZn Ferrite High Frequency Switching Transformer
Product Overview of ETD59 Transformer
Our ETD59 Transformer, the ETD59 horizontal high frequency model, acts as a core power conversion component widely adopted in high-power switching power supplies. It perfectly matches multiple mainstream circuit topologies including half-bridge, full-bridge, push-pull and resonant conversion circuits. ETD39 and ETD49 are also normal type of ETD type serise.
Take the half-bridge circuit as an example. Two power switch tubes produce 100kHz high-frequency pulses alternately.
In addition, our ETD59 Transformer converts these pulses into steady AC output power.The turns ratio of primary and secondary windings determines the final output voltage of the power supply. Adopting low-loss manganese-zinc ferrite ETD59 core and horizontal DIP pin layout, this model reserves sufficient PCB layout space and supports high power density design.
Core Advantages of ETD59 Transformer
- Large-size ETD59 ferrite core, high power carrying capacity up to several kilowatts
- Horizontal double-row pin layout, convenient automated PCB soldering and layout design
- Low core loss & low copper loss, low temperature rise under continuous full-load operation
- Wide operating frequency range: 20kHz ~ 250kHz, compatible with various high-power switching circuits
- Customizable winding turns ratio, pin definition, enameled wire temperature grade (155℃ / 180℃)
ETD59 high -frequency transformer performance
1. Work frequency: 20KHz-500KHz
2. Output power: 400 to 2000 w
3. Work temperature: -40 ℃ to +125 ℃
4. Storage temperature: -25 ℃ to +85 ℃
5. Storage humidity: 30 to 95%
Datameters of ETD59 Transformer
| Type | Structure type | Dimension(mm) | Pin Row1(mm) | Pin Row2(mm) | Row Pitch | OD Pin(mm) | Note | ||||
| A | B | C | Pin | Pin Pitch | Pin | Pin Pitch | |||||
| ETD29-001 | Horizontal | 37 | 38 | 26 | 7 | 5.0 | 7 | 5.0 | 26 | ∅0.8 | |
| ETD29-002 | Vertival | 37 | 26 | 43 | 6 | 5.0 | 6 | 5.0 | 20.3 | ∅0.6 | |
| ETD29-003 | Vertival | 37 | 25 | 37 | 7 | 5.0 | 7 | 5.0 | 17.5 | ∅0.8 | |
| ETD34-001 | Vertival | 36 | 31 | 40 | 6 | 5.0 | 6 | 5.0 | 25 | ∅1.0 | |
| ETD34-002 | Vertival | 43 | 32 | 41 | 8 | 5.0 | 8 | 5.0 | 25.2 | ∅1.0 | |
| ETD34-003 | Horizontal | 41 | 41 | 31.5 | 7 | 5.0 | 7 | 5.0 | 25.2 | ∅1.0 | |
| ETD34-004 | Horizontal | 41 | 41 | 30 | 15 | 2.54 | 15 | 2.54 | 30 | ∅0.8 | |
| ETD34-005 | Horizontal | 43.5 | 38 | 30 | 16 | 2.5 | 16 | 2.5 | 25.5 | ∅0.8 | |
| ETD34-006 | Horizontal | 41 | 41 | 30 | 16 | 2.54 | 16 | 2.54 | 30 | ∅0.6 | |
| ETD39-001 | Vertival | 45.5 | 30 | 53 | 8 | 5.08 | 8 | 5.08 | 25.4 | ∅1.0 | |
| ETD39-002 | Horizontal | 46.5 | 45 | 36 | 8 | 5.0 | 8 | 5.0 | 30.4 | ∅1.0 | |
| ETD39-003 | Horizontal | 44 | 47 | 38.5 | 7 | 5.0 | 7 | 5.0 | 35.3 | ∅1.0 | |
| ETD44-001 | Vertival | 47 | 34.5 | 52 | 9 | 5.0 | 9 | 5.0 | 27.5 | ∅1.0 | |
| ETD44-002 | Horizontal | 50 | 52.5 | 40.5 | 9 | 5.0 | 9 | 5.0 | 36.8 | ∅1.0 | |
| ETD49-001 | Vertival | 55 | 41.5 | 58.5 | 9 | 5.0 | 9 | 5.0 | 27.5 | ∅1.0 | |
| ETD49-002 | Vertival | 56 | 38.5 | 58.5 | 10 | 5.0 | 10 | 5.0 | 30.5 | ∅1.0 | |
| ETD49-003 | Vertival | 56.5 | 40 | 58.5 | 11 | 5.0 | 11 | 5.0 | 27.5 | ∅1.0 | |
| ETD49-004 | Horizontal | 56.5 | 55 | 51.5 | 10 | 5.0 | 10 | 5.0 | 40.5 | ∅1.0 | |
| ETD49-005 | Horizontal | 56 | 59 | 43 | 10 | 5.0 | 10 | 5.0 | 40.7 | ∅1.0 | 2 slot |
| ETD54-001 | Vertival | 69 | 40 | 65 | 11 | 5.08 | 11 | 5.08 | 33 | ∅0.9 | |
| ETD54-002 | Horizontal | 63 | 63 | 46 | 11 | 6.08 | 11 | 5.08 | 45.9 | ∅1.0 | |
| ETD59-001 | Horizontal | 72.5 | 68 | 46 | 13 | 5.0 | 13 | 5.1 | 50.8 | ∅0.8 | |

Technical Specifications
| Item | Standard Parameter | Custom Support |
|---|---|---|
| Core Model | ETD59 MnZn Low Loss Ferrite Core | Custom ETD series core available |
| Installation Type | Horizontal Double Row DIP Pins | Custom pin quantity & arrangement |
| Working Frequency | 20kHz ~ 250kHz | Frequency adjusted by circuit demand |
| Rated Power Range | 800W ~ 3000W | Custom high-power design support |
| Operating Temperature | -40℃ ~ +125℃ | Heat-resistant wire upgrade optional |
| Insulation Grade | Class F high temperature resistant | Class B optional |
Main Application Fields for ETD59 Transformer:
(1) current distribution
A typical high-frequency transformer has multiple parallel windings. Each secondary winding is coupled to the same primary winding. Therefore, the ampere-turns produced by the secondary winding current equal those from the primary winding (if excitation current is neglected). This feature is especially valuable for parallel rectifier circuits: the windings achieve automatic current sharing, so parallel rectifier circuits no longer require matched resistances or extra balancing components.
(2) high current density
High-frequency transformers feature outstanding thermal rise performance, enabling them to deliver high current density within compact packaging.
(3) efficiency
By tuning leakage inductance for ultra-fast switching speed and extremely low crossover loss, the transformer can reach superior efficiency, with minimal power transmission loss between primary and secondary windings.
(4) high power density
The compact size of high-frequency transformers delivers outstanding heat dissipation performance. They can be densely integrated with matching semiconductor devices and inductors to realize high power density design, with a current density up to 30A per module.
(5) low cost
High-frequency transformers consist of a small quantity of low-cost standard components, and the assembly process is simple and efficient, which effectively lowers the overall transformer cost.
(6) save the cost of components connected to it
Low leakage inductance and minimal switching loss reduce electrical stress on peripheral connected components. This allows designers to adopt lower-rated, cheaper auxiliary parts, further cutting the total BOM cost of the whole power supply system.
Main Application Fields
- High-power industrial switching power supply, DC fast charging station module
- UPS uninterruptible power supply, solar photovoltaic inverter equipment
- Medical high-power isolation power supply, laboratory test power unit
- New energy storage converter, servo drive high-power power supply
- Industrial laser equipment, welding machine power conversion module
One-Stop Matching Electronic Components
- Full range SMD power inductors: CD / NR / RH / integrated molded high-current inductors
- Power semiconductor devices: MOSFET, IGBT, SiC/GaN power chips, PWM driver IC, control MCU
- EMI common mode filter chokes, high voltage capacitors, power resistors and circuit protection components
Our ETD59 Transformer follows strict MnZn ferrite core high frequency transformer industry standard released by IEEE to guarantee low core loss performance.
Details

Official main product photo of horizontal ETD59 high power high frequency transformer with dual row through-hole pins and yellow insulating winding, applied for industrial power supply, inverter and EV fast charger








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