Surface Mount
Wideband RF Transformers
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New RoHS part numbers are shown. The products were always compliant; only the part numbers changed. The second to the last character is now L to indicate RoHS compliance. (Old data sheet can be viewed here.) |
- The smallest RF transformers available
- Available in both 1:1, 1.5:1 and 2:1 versions
- 1812 size ferrite body with a ceramic base
- Jacketed with a high temp material that creates a flat top for auto insertion
- Typical applications are as impedance or isolation transformer
- Can also be used for balanced to unbalanced (balun) conversion
- RoHS-compliant. 260°C compatible. Gold over nickel over moly-manganese terminations.
Photo 
Pricing 
Materials declaration 
PDF data sheet
SPECIFICATIONS
Frequency Response curves -
1:1 transformers
1.5:1 transformers
2:1 transformers
Dimensions 
Tape
and reel specifications
3D model
1:1 Transformers |
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| 1812WBT-1L_ | 14 | 10 | 1:1 | 4.8 | 200 | 50 | <1 | 0.340 - 22 | Yellow |
| 1812WBT-2L_ | 5.3 | 10 | 1:1 | 1.8 | 400 | 50 | <1 | 0.800 - 60 | Green |
| 1812WBT-3L_ | 1.25 | 50 | 1:1 | 0.7 | 500 | 50 | <1 | 4 - 200 | White |
| 1812WBT-4L_ | 0.220 | 50 | 1:1 | 0.3 | 700 | 50 | <1 | 11 - 480 | Orange |
| 1812WBT-5L_ | 0.090 | 50 | 1:1 | 0.15 | 700 | 50 | <1.5 | 48 - 645 | Red |
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1.5:1 Transformers |
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| 1812WBT1.5-1L_ | 5 | 3.3 | 10 | 1.5:1 | 1.05 | 0.87 | 400 | 50 | <0.5 | 1.3 - 100 | Red |
| 1812WBT1.5-2L_ | 2.5 | 1.6 | 10 | 1.5:1 | 0.74 | 0.58 | 500 | 50 | <0.5 | 2.75 - 135 | Orange |
| 1812WBT1.5-3L_ | 1 | 0.6 | 10 | 1.5:1 | 0.43 | 0.34 | 500 | 50 | <0.75 | 7.2 - 200 | Yellow |
| 1812WBT1.5-4L_ | 0.144 | 0.090 | 10 | 1.5:1 | 0.18 | 0.14 | 700 | 50 | <2.25 | 38 - 535 | Green |
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2:1 Transformers |
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| 1812WBT2-1L_ | 13.80 | 6.90 | 10 | 2:1 | 4.6 | 3.2 | 200 | 50 | <1.5 | 0.800 - 23 | Brown |
| 1812WBT2-2L_ | 5.850 | 2.925 | 10 | 2:1 | 1.25 | 0.95 | 400 | 50 | <1.5 | 2.2 - 65 | Red |
| 1812WBT2-3L_ | 2.60 | 1.30 | 10 | 2:1 | 0.52 | 0.42 | 600 | 50 | <1.5 | 4 - 105 | Orange |
| 1812WBT2-4L_ | 0.910 | 0.455 | 50 | 2:1 | 0.27 | 0.23 | 700 | 50 | <1.5 | 11 - 200 | Yellow |
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| 1 | When ordering, please specify packaging code: e.g. 1812WBT1.5-4LC | |
| Packaging: | C = 7"
machine-ready reel EIA-481 embossed plastic tape (600 parts per full reel). B = Less than full reel On reel but not machine-ready. To have a leader and trailer added ($25 charge), use code letter C instead. D = 13" reel, machine-ready EIA-481 embossed plastic tape. Factory order only, not stocked (2200 parts per full reel. |
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| 2 | Ambient temperature range: | –40°C to +85°C |
| 3 | Storage temperature range: | Component: –40°C to +85°C T&R packaging: –40°C to +80°C |
| 4 | 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. | |
| 5 | Electrical specifications at 25°C. Measurements are referenced to 50 Ohms. | |
| Refer to Soldering Coilcraft Components before soldering. | ||
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