1812WBT-1L Datasheet, PDF (1/2 Pages) Coilcraft lnc. – Surface Mount Wideband RF Transformers

Document 117-1
Surface Mount Wideband RF Transformers
Available in a variety of impedance versions, Coilcraft’s
WBT Series chip transformers provide wide band pass
performance in a small surface mount package.
The transformers are built on an 1812 size ferrite body
with a ceramic base. They feature 50 V isolation and a
1/4 Watt RF input power rating. The top is a high
temperature material that creates a flat surface for auto
insertion. The parts are packaged in tape and reel for
easy dispensing.
Applications include impedance matching, voltage or
current transformation, DC isolation, balanced/unbal-
anced mixing, matching, power splitting, coupling and
signal inversion.
To request free evaluation samples, contact Coilcraft or
visit www.coilcraft.com.
1:1 Transformers
Part
number¹
Inductance² Test frequency Imp. ratio
(µH)
(MHz)
pri : sec
1812WBT-1L_
14
10
1:1
1812WBT-2L_
5.3
10
1:1
1812WBT-3L_
1.25
50
1:1
1812WBT-4L_
0.220
50
1:1
1812WBT-5L_
0.090
50
1:1
DCR max
(Ohms)
4.8
1.8
0.7
0.3
0.15
IDC
(mA)
200
400
500
700
700
Isolation
(Vrms)
50
50
50
50
50
Insertion
loss (dB)
<1
<1
<1
<1
<1.5
Bandwidth Color
(MHz)
dot
0.340–22
0.800–60
4–200
11–480
48–645
Yellow
Green
White
Orange
Red
1.5:1 Transformers
Part
number¹
Inductance (µH)²
pri sec
1812WBT1.5-1L_
1812WBT1.5-2L_
1812WBT1.5-3L_
1812WBT1.5-4L_
5.0
2.5
1.0
0.144
3.3
1.6
0.6
0.090
Test freq.
(MHz)
10
10
10
10
Imp. ratio
pri : sec
1.5 : 1
1.5 : 1
1.5 : 1
1.5 : 1
DCR max (⏲)
pri sec
1.05 0.87
0.74 0.58
0.43 0.34
0.18 0.14
IDC
(mA)
400
500
500
700
Isolation
(Vrms)
50
50
50
50
Insertion Bandwidth Color
loss (dB) (MHz)
dot
0.5
1.3–100 Red
0.5
2.75–135 Orange
0.75
7.2–200 Yellow
2.25
38–535 Green
2:1 Transformers
Part
number¹
Inductance (µH)²
pri sec
1812WBT2-1L_
1812WBT2-2L_
1812WBT2-3L_
1812WBT2-4L_
13.80
5.850
2.60
0.910
6.90
2.925
1.30
0.455
Test freq.
(MHz)
10
10
10
50
Imp. ratio
pri : sec
2:1
2:1
2:1
2:1
DCR max (⏲)
pri sec
4.6 3.2
1.25 0.95
0.52 0.42
0.27 0.23
IDC
(mA)
200
400
600
700
Isolation
(Vrms)
50
50
50
50
Insertion Bandwidth Color
loss (dB) (MHz)
dot
<1.5
0.800–23 Brown
<1.5
2.2–65 Red
<1.5
4–105 Orange
<1.5
11–200 Yellow
1. When ordering, please specify termination and packaging codes:
1812WBT-1.5-4LC
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. Operating temperature range -40°C to +85°C.
4. Electrical specifications at 25°C.
Specifications subject to change without notice.
Please check our website for latest information.
Document 117-1 Revised 03/23/06
© Coilcraft, Inc. 2006