© Coilcraft, Inc. 2005
Specifications subject to change without notice.
Please check our website for latest information.
Mini Spring™ Air Core Inductors
Document 107-1
Document 107-1 Revised 01/30/03
Test SRF5DCR6
Part Inductance2Percent Q4freq. min max Irms7Weight
number1Turns (nH) tolerance3min (MHz) (GHz) (mOhm) (A) (mg)
A01T_ 1 2.5 10 145 150 12.5 1.1 4 31
A02T_ 2 5.0 10,5,2 140 150 6.5 1.8 4 42
A03T_ 3 8.0 5,2 140 150 5.0 2.6 4 52
A04T_ 4 12.5 5,2 137 150 3.3 3.4 4 65
A05T_ 5 18.5 5,2 132 150 2.5 3.9 4 78
B06T_ 6 17.5 5,2 100 150 2.2 4.5 4 100
B07T_ 7 22.0 5,2 102 150 2.1 5.2 4 110
B08T_ 8 28.0 5,2 105 150 1.8 6.0 4 118
B09T_ 9 35.5 5,2 112 150 1.5 6.8 4 133
B10T_ 10 43.0 5,2 106 150 1.2 7.9 4 147
These surface mount air core “spring” inductors provide
extremely high Q over a wide frequency range.
They’re jacketed with a high temperature material that
ensures mechanical stability and very tight tolerance. It
also forms a flat top, making them suitable for automatic
placement and reflow or vapor phase processing. Solder
coated leads ensure reliable soldering.
Coilcraft Mini Spring™ inductors are available in standard
EIA tape and reel packaging: 12 mm for size A, and
16 mm for size B parts.
Coilcraft Designer’s Kit C102 contains samples of all
5% inductance tolerance parts. Kits with 2% tolerance
are also available. To order, contact Coilcraft or visit
http://order.coilcraft.com.
1. When ordering, please specify tolerance code:
A02TG
Tolerance: G =2% J = 5% K = 10%
2. Inductance measured using Agilent/HP 4286 with Coilcraft SMD-A fixture and correlation.
3. Tolerances in bold are stocked for immediate shipment.
4. Q measured using Agilent/HP 4291A with Agilent/HP 16193A test fixture.
5. SRF tested on the Agilent/HP 8720D and the SMD-D test fixture.
6. DCR tested on the Cambridge Technology Model 510 Micro-ohmmeter.
7. Average current for a 15°C rise above 25°C ambient.
8. Operating temperature range -40°C to +125°C.
9. Electrical specifications at 25°C.
See Qualification Standards section for environmental and test data
© Coilcraft, Inc. 2005
Specifications subject to change without notice.
Please check our website for latest information.
Document 107-2
Document 107-2 Revised 03/14/05
Mini Spring™ Air Core Inductors
Typical L vs Frequency
Typical Q vs Frequency
25
20
15
10
5
0
60
55
50
45
40
35
30
25
20
15
10
100 100
200 200
400 400
600 600
1000 1000
Inductance (nH)
Inductance (nH)
Frequency (MHz) Frequency (MHz)
17.5 nH
22.0 nH
28.0 nH
35.5 nH
43.0 nH
2.5 nH
5.0 nH
8.0 nH
12.5 nH
18.5 nH
220
210
200
190
180
170
160
150
140
130
135
130
125
120
115
110
105
100
95
90
100 100
200 200
400 400
600 600
1000 1000
Q factor
Q factor
Frequency (MHz) Frequency (MHz)
28.0 nH
35.5 nH
43.0 nH
22.0 nH
17.5 nH
18.5 nH
12.5 nH
8.0 nH
5.0 nH
2.5 nH
Recommended Land Patterns
A
B
D
C
E
F
135°
max
0° min
Strip Length
SIZE A SIZE B
0.110
2,79
0.110
2,79
0.185
4,70
0.285
7,23
0.065
1,65
0.165
4,19
0.050
1,27
0.050
1,27
0.130
3,30
0.130
3,30
Size A max B C max D E F maxmax
A 0.155 0.124 0.125 0.115 0.0290.175 ±0.010 ±0.010
3,94 4,45 3,15 3,18 ±0,25 2,92 ±0,25 0,74
B 0.270 0.175 0.124 0.125 ±0.010 0.230 ±0.015 0.029
6,86 4,45 3,15 3,18 ±0,25 5,84 ±0,38 0,74
Encapsulant
Tape and reel: 700/7″ reel; 2500/13″ reel 500/7″ reel; 2200/13″ reel
12 mm tape width 16 mm tape width
For packaging data see Tape and Reel Specifications section.
Terminations: Tin/lead over copper
