EFD Series EFD40 SMD and THT type high frequency transformer with 2
section and cover
>>> Features
1. Custom design available
2. Extreme flatness
3. 8+8 pins
4. Through hole and surface mount available
>>> Quick Details
Place of Origin: Guangdong, China (Mainland)
Brand Name: Greenfair, GFE, GE
Model Number: EFD11, EFD12, EFD13, EFD15, EFD16, EFD17, EFD18,
EFD20, EFD21, EFD25, EFD30, EFD32, EFD35,EFD36, EFD40.
Usage: High Frequency
Phase: Single
Coil Structure: Toroidal
Coil Number: Autotransformer
Color: Yellow
Size: Horizontal
Type: EE,EI ,EC,PQ,EFD,EPC,UU,R,RH,DR, etc
Core Grade: PC40, 3C90,TP4
Bobbin Material: Phenolic
| no | winding | material | margin | tube | pin | turns |
| PIN1-8 side | PIN9-16 side | start | end |
| 1 | N8 | 2UEW Ø0.15mm*20P(LITZ wire) | | | TFL | TFL | 1,2--4,5 | 31Ts space |
| 2 | N1 | 2UEW Ø0.15mm*65P(LITZ wire) | | 0.41*3mm | TFL | TFL | 9--13,14 | 2Ts space |
| 3 | N2 | 2UEW Ø0.15mm*65P(LITZ wire) | | | TFL | TFL | 13,14--10 | 2Ts space |
| 4 | N3 | 2UEW Ø0.15mm*65P(LITZ wire) | | | TFL | TFL | 10--12 | 1Ts space |
| 5 | N4 | 2UEW Ø0.15mm*65P(LITZ wire) | | | TFL | TFL | 11--9 | 1Ts space |
| 6 | N5 | 2UEW Ø0.15mm*65P(LITZ wire) | | | TFL | TFL | 12--16 | 1Ts space |
| 7 | N6 | 2UEW Ø0.15mm*65P(LITZ wire) | | | TFL | TFL | 15--11 | 1Ts space |
| 8 | N7 | 2UEW Ø0.4mm*1P | | | TFL | TFL | 15-A | 1Ts space |
| no | parameter | pin | test data | test condition |
| 1 | inductance | N8 | 450-550uH | 1KHZ,0.3V |
| 2 | leakage inductance | N8 | 70--130uH | 1KHZ,0.3V |
| 3 | Q Value | 30 MIN | 100KHZ,0.3V | |
| 4 | HI-POT | N8—N1,N2,N3,N4,N5,N6,N7 | 3750Vac without break | 1mA 60Sec |
| N8—CORE | 3750Vac without break | 1mA 60Sec |
| N1,N2,N3,N4,N5,N6,N7—CORE | 1500Vac without break | 1mA 60Sec |
General information:
It is recommended that the temperature of the part does not exceed
+125°C under worst case conditions.
Storage Temperature: -40°C to 85°C
Operating Temperature: -40°C to 125°C
Test conditions of Electrical Properties: 20°C, 33% RH if not
specified differently
| OPERATING TEMPERATURE RANGE, PACKAGE QUANTITY, PRODUCT WEIGHT |
| Temperature range | Humidity range | Standard test conditions |
| Operating temperature* | Storage temperature | Operating temperature** | Storage temperature** | Operating temperature** | Storage temperature** |
| ( ℃) | ( ℃) | ( % RH) | ( % RH) | ( ℃) | ( % RH) |
| -30 to +120 | -40 to +80 | 10 to +95 | 10 to +95 | 25 ± 10 | 25 to +75 |
* With self-heating
** Maximum wet-bulb temperature 38°C, without dewing
***Without dewing
