 
SMT Planar Transformer for
National Semiconductor LM5033
| New RoHS part numbers are shown.
Lead was removed from internal parts. The second to the last character is now L to indicate RoHS
compliance. (View old data sheet.)
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- Developed for National Semiconductor LM5033 PWM Controller
- For push-pull, half-bridge and
full-bridge topologies
- Ideal for Intermediate bus converters (IBC)
- 1500 Vrms isolation, primary to secondary
windings
- RoHS-compliant. 260°C compatible. Matte tin over nickel over brass
terminations.
 Photo 
Pricing 
Materials declaration 
PDF data sheet
SPECIFICATIONS
 Dimensions  Schematic
Tape and reel specifications
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B0853-AL_ |
200 |
40 – 60 |
10 |
20 |
46.8 |
0.10 |
Pri: 10.4
Sec: 4.0
Aux: 160.0 |
5 : 4 : 4 |
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| 1 |
When ordering, please
specify packaging code: e.g. B0853-ALD |
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Packaging: |
D = 13"
machine-ready reel
EIA 481 embossed plastic tape (200 parts per full reel).
B = Less than full reel
In tape, but not machine-ready. To have a leader and trailer added ($25
charge), use code letter D instead. |
| 2 |
Inductance measured
on an Agilent/HP 4284 between pins 3 and 4 at 250 kHz, 0.1 Vrms, 0 Adc |
| 3 |
Leakage
inductance measure between pins 3 and 4 at 100 kHz, 0.1 Vrms, 0 Adc with
pins 6 and 10 shorted. |
| 4 |
Turns ratio is with
the secondary windings connected in series. |
| 5 |
Ambient temperature range: |
–40°C to +85°C |
| 6 |
Storage temperature range: |
Component: –40°C to +85°C
Packaging: –55°C to +80°C |
| 7 |
Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between. |
| 8 |
Electrical specifications at 25°C. |
| Refer to Soldering Coilcraft Components before soldering. |
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