 
SMT Transformer
for Power over Ethernet
| New RoHS part numbers are shown.
Lead was removed from terminations. The next to the last character is now L to indicate RoHS compliance. (View
old data sheet.)
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- Developed for
Maxim MAX5941B PoE Interface/PWM Controller
- IEEE 802.3af
compliant PoE forward converter applications
- Low profile, surface mount transformer
- 3.3 V, 4 A output
- 275 kHz switching frequency at a 50% duty cycle
- 1500 Vrms isolation from primary, reset and bias to the secondary and drive
- RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations
 Photo 
Pricing 
Materials declaration 
PDF data sheet
SPECIFICATIONS
 Dimensions  Schematic
Tape and reel specifications
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B0863-BL_ |
165.0 |
0.061 (primary)
1.00 (reset)
1.29 (bias)
0.008 (sec)
0.023 (drive) |
0.75 |
28 – 60 |
1 : 0.24 : 1 : 0.24 : 1.3 |
3.3 V, 4 A |
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| 1 |
When ordering, please
specify packaging code: e.g. B0863-BLD |
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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 is for the primary, measured at 10 kHz, 0.1 Vrms, 0 Adc. |
| 3 |
DCR for the
secondary is measured with the windings connected in parallel. |
| 4 |
Leakage
inductance is for the primary with all other windings shorted. |
| 5 |
Turns ratio is with
the secondary windings connected in parallel. |
| 6 |
Output is with the the secondary windings connected in parallel. |
| 7 |
Ambient temperature range: |
–40°C to +85°C |
| 8 |
Storage temperature range: |
Component: –40°C to +85°C
Packaging: –55°C to +80°C |
| 9 |
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. |
| 10 |
Electrical specifications at 25°C. |
| Refer to Soldering Coilcraft Components before soldering. |
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