ETD-29-ETD-39 Power Transformers from China Suppliers | High-Efficiency Factory Solutions for Multi-output Applications
Shape and External Dimensions (mm)
Electronic Specifications
| Core Shape | ETD-29/32/10 | ETD-34/34/11 | ETD39/40/13 |
| Central Column Area of the Core Aemm² | 73.4 | 97.1 | 125 |
| Magnetic Circuit Length Le mm | 70.6 | 78.6 | 92.1 |
| Volume Ve mm³ | 5196 | 7632 | 11510 |
| Frame Type | Horizontal | Horizontal | Horizontal |
| Dimensions W＊D＊H mm | 37.5*36.5*27 | 42*42*32 | 46*49*38 |
| Maximum Output Power VA | 170 | 270 | 380 |
Note: The design is based on: 1. Forward model 2. PC40 series ferrite 3. Switching frequency: 100KHz
Frequently Asked Questions
What are the primary applications for ETD series switching power transformers?
ETD series transformers are widely used in switching mode power supplies (SMPS), power inverters, industrial control systems, and telecommunication equipment due to their high efficiency and excellent thermal stability.
Why is PC40 series ferrite core used in this design?
PC40 is a high-performance Mn-Zn ferrite material optimized for power applications. It offers low core losses at frequencies up to 100KHz, making it ideal for efficient switching power conversion.
How does the core size affect the maximum output power?
Larger core sizes provide a larger central column area (Ae) and magnetic volume (Ve). As shown in the specifications, the maximum output power increases from 170 VA (ETD-29) to 380 VA (ETD-39) as the core dimensions increase.
What is the advantage of the horizontal frame type?
The horizontal frame design offers a lower profile height compared to vertical layouts, making it highly suitable for slim electronic enclosures and rack-mounted power units.
Can these transformers operate at frequencies higher than 100KHz?
While the standard design is optimized for 100KHz, these transformers can operate at higher frequencies. However, core losses and winding design must be re-evaluated to ensure safe operating temperatures.