US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Surface Mount Wideband RF Transformers
Document 117-1
Document 117E-1 Revised 07/21/17
• Provides wide band pass performance in a small SMT package.
• 1812 size ferrite body with a ceramic base.
• 50 V isolation, 1/4 Watt RF input power
1:1 Transformers
Part Inductance2 Test frequency Imp. ratio DCR max IDC Isolation Insertion Bandwidth Color
number1 (µH) (MHz) pri : sec (Ohms) (mA) (Vrms) loss (dB) (MHz) dot
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
1.5:1 Transformers
Part Inductance (µH)2 Test freq. Imp. ratio DCR max () IDC Isolation Insertion Bandwidth Color
number1 pri sec (MHz) pri : sec pri sec (mA) (Vrms) loss (dB) (MHz) dot
1812WBT1.5-1L_ 5.0 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 0.60 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
2:1 Transformers
Part Inductance (µH)2 Test freq. Imp. ratio DCR max () IDC Isolation Insertion Bandwidth Color
number1 pri sec (MHz) pri : sec pri sec (mA) (Vrms) loss (dB) (MHz) dot
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
1. When ordering, please specify termination and packaging codes:
1812WBT1.5-4LC
Termination: L = 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.
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 to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCBt_Washing.pdf.
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Document 117-2
Typical Frequency Attenuation
1:1 Transformers
Typical Frequency Attenuation
1.5:1 Transformers
Typical Frequency Attenuation
2:1 Transformers
4 4
3 3
11
2 2
Bottom View
0.070
1,78
0.100 ±0.003
2,54 ±0,008
0.178 ±0.003
4,52 ±0,08
0.150
3,81 max
ref
Color dot
over
pin 1
0.135
3,43 max
0.195
4,95 max
0.048
1,22
0.015
0,38
0.115
2,92
0.018
0,46
0.020
0,51
0.057
1,45
Recommended
Land Pattern
0.015
0,38 ref
0.040
1,02
0.020
0,51
ref
0.030 ±0.002
0,76 ±0,05
Pad
Detail
Pri Sec
14
23
Attenuation (dB, Re: 50 Ohms)
Frequency (MHz)
0
1
2
3
4
5
6
7
8
0.1 110 100
1000
-1 -2 -4
-3 -5
Attenuation (dB, Re: 50 Ohms)
0
1
2
3
4
5
6
7
8
Frequency (MHz)
0.1 110 100
1000
-1 -2 -4
-3
Attenuation (dB, Re: 50 Ohms)
0
1
2
3
4
5
6
7
8
Frequency (MHz)
0.1 110 100
1000
-1 -2 -4
-3
Measured on a network analyzer (re: 50 Ohms)
Document 117-2 Revised 07/21/17
Dimensions are in inches
mm
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Coilcraft:
1812WBT2-3LC 1812WBT2-2LC 1812WBT2-4LB 1812WBT-4LB 1812WBT1.5-2LC 1812WBT1.5-3LB
1812WBT1.5-2LB 1812WBT1.5-4LC 1812WBT-1LB 1812WBT2-1LC 1812WBT1.5-1LC 1812WBT-4LC 1812WBT2-
4LC 1812WBT-5LC 1812WBT2-1LB 1812WBT-5LB 1812WBT1.5-3LC 1812WBT-3LC 1812WBT1.5-1LB
1812WBT2-3LB 1812WBT-2LB 1812WBT-2LC 1812WBT-3LB 1812WBT2-2LB 1812WBT-1LC 1812WBT1.5-4LB
