Document 117-1
Surface Mount Wideband RF Transformers
• ProvideswidebandpassperformanceinasmallSMTpackage.
• 1812 size ferrite body with a ceramic base.
• 50 V isolation, 1/4 Watt RF input power
Core material Ferrite
Terminations RoHS compliant gold over nickel over moly-manganese.
Other terminations available at additional cost.
Weight 131 – 152 mg
Ambient temperature –40°C to +85°C with Irms current
Storage temperature Component: –40°C to +85°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
One per billion hours / one billion hours, calculated per Telcordia SR-332
Packaging 600/7″ reel; 2200/13″ reel Plastic tape: 12 mm wide,
0.3 mm thick, 8 mm pocket spacing, 3.7 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
1:1 Transformers
Part
Inductance2 Test frequency Imp. ratio
DCR max
(Ohms)
IDC
(mA)
Isolation
(Vrms)
Insertion Bandwidth Color
number1
(µH)
(MHz)
pri:sec
loss (dB)
(MHz)
dot
1812WBT-1L_
1812WBT-2L_
1812WBT-3L_
1812WBT-4L_
1812WBT-5L_
14
10
10
50
50
50
1:1
1:1
1:1
1:1
1:1
4.8
1.8
0.7
0.3
0.15
200
400
500
700
700
50
50
50
50
50
<1
0.340
–
22
60
Yellow
Green
White
Orange
Red
5.3
<1
0.800
–
1.25
0.220
0.090
<1
4–
200
<1
11
–
480
<1.5
48
–645
1.5:1 Transformers
Inductance (µH)2
DCR max ()
Part
Test freq. Imp. ratio
IDC
Isolation Insertion Bandwidth Color
number1
pri
sec
3.3
1.6
0.60
0.090
(MHz)
pri : sec
pri
sec
(mA)
(Vrms) loss (dB)
(MHz)
1.3 100
2.75
7.2
38
dot
1812WBT1.5-1L_
1812WBT1.5-2L_
1812WBT1.5-3L_
1812WBT1.5-4L_
5.0
10
10
10
10
1.5:1
1.5:1
1.5:1
1.5:1
1.05
0.74
0.43
0.18
0.87
0.58
0.34
0.14
400
500
500
700
50
50
50
50
<0.5
–
Red
2.5
<0.5
–
135 Orange
1.0
0.144
<0.75
<2.25
–200
Yellow
Green
–535
2:1 Transformers
Inductance (µH)2
DCR max ()
Part
Test freq. Imp. ratio
IDC
Isolation Insertion Bandwidth Color
(Vrms) loss (dB) (MHz) dot
0.800
2.2 65
105
200
number1
pri
sec
(MHz)
pri:sec
pri
sec
(mA)
1812WBT2-1L_
1812WBT2-2L_
1812WBT2-3L_
1812WBT2-4L_
13.80
5.850
2.60
6.90
10
10
10
50
2:1
2:1
2:1
2:1
4.6
3.2
200
400
600
700
50
50
50
50
<1.5
<1.5
<1.5
<1.5
–23 Brown
2.925
1.30
1.25
0.52
0.27
0.95
0.42
0.23
–
Red
4
–
Orange
Yellow
0.910
0.455
11–
1. When ordering, please specify termination and packaging codes:
1812WBT1.5-4LC
Termination: E = RoHS compliant gold over nickel over moly-manganese
Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37).
Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic tape (600 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 C instead.
D = 13″ machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (2200 parts per full reel).
2. Inductance is per winding
3. Electrical specifications at 25°C. Measurements are referenced to 50 Ohms.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Document 117E-1 Revised 03/23/06
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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