COILCRAFT ST470RAT28N_LZ

AIR CORE INDUCTORS
Air Core Inductors for Critical Applications
ST439RAT
ST470RAT
■Small air core inductors feature high Q and tight tolerances
■Acrylic jacket provides a flat top for pick and place
■Solder coated leads ensure reliable soldering
Terminations RoHS compliant tin-silver over copper. Other terminations available at additional cost.
Ambient temperature –40°C to +125°C with Imax current, +125°C
to +140°C with derated current
Storage temperature Component: –40°C to +140°C.
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
Temperature Coefficient of Inductance (TCL) +5 to +70 ppm/°C
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Packaging ST439RAT: 700/7″ reel Plastic tape: 12 mm wide, 0.32 mm thick,
8 mm pocket spacing, 3.3 mm pocket depth
ST470RAT: 500/7″ reel Plastic tape: 16 mm wide, 0.28 mm thick,
8 mm pocket spacing, 3.4 mm pocket depth
SRFDCR
L2 Percent Q3 min4 max5 Imax Weight
Part number1 Turns(nH) tol min (GHz)(mOhm) (A) (mg)
ST439RAT2N5KLZ 12.510 14512.5 1.1 4
31
ST439RAT5N0_LZ 25.05,2 1406.5 1.8 4 42
ST439RAT8N0_LZ 38.05,2 1405.0 2.6 4 52
ST439RAT13N_LZ 412.5 5,2 1373.3 3.4 4 65
ST439RAT19N_LZ 518.5 5,2 1322.5 3.9 4 78
ST470RAT18N_LZ 617.5 5,2 1002.2 4.5 4 100
ST470RAT22N_LZ 722.0 5,2 1022.1 5.2 4 110
ST470RAT28N_LZ 828.0 5,2 1051.8 6.0 4 118
ST470RAT36N_LZ 935.5 5,2 1121.5 6.8 4 133
ST470RAT43N_LZ 1043.0 5,2 1061.2 7.9 4 147
1. When ordering, please specify tolerance, termination and testing codes:
ST470RAT43NGLZ
Tolerance: G=2% J = 5%
Termination:L= RoHS compliant tin-silver over copper.
Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or
S = non-RoHS tin-lead (63/37).
Testing:Z=COTS
H= Screening per Coilcraft CP-SA-10001
2. Inductance measured at 150 MHz on an Agilent/HP 4286A or equivalent with
a Coilcraft SMD-A test fixture and correlation.
3. Q measured at 150 MHz on an Agilent/HP 4291A or equivalent with a 16193A
test fixture or equivalent.
4. SRF measured on an Agilent/HP 8753ES network analyzer or equivalent
with a Coilcraft CCF1268 test fixture. Parts with SRF >5 GHz are verified to
>5 GHz in screening
5. DCR measured on a Keithley 580 Micro-Ohmmeter or equivalent.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
®
inches
mm
Specifications subject to change without notice.
Please check our website for latest information.
1102 Silver Lake Road
Cary IL 60013
© Coilcraft, Inc. 2011
Dimensions are in
Document ST107-1 Revised 10/24/11
Phone 800-981-0363
Fax 847-639-1508
E-mail cps@coilcraft.com
Web www.coilcraft-cps.com
AIR CORE INDUCTORS
ST439RAT / ST470RAT Air Core Inductors
L vs Frequency – ST439RAT
L vs Frequency – ST470RAT
25
60
43.0 nH
55
50
18.5 nH
Inductance (nH)
Inductance (nH)
20
15
12.5 nH
10
8.0 nH
5.0 nH
5
100
35.5 nH
40
35
28.0 nH
30
22.0 nH
25
20
2.5 nH
0
45
17.5 nH
15
200
400
600
10
1000
100
Frequency (MHz)
Q vs Frequency – ST439RAT
600
1000
135
210
130
2.5 nH
125
200
17.5 nH
120
5.0 nH
180
170
8.0 nH
160
Q factor
190
Q factor
400
Q vs Frequency – ST470RAT
220
22.0 nH
115
28.0 nH
35.5 nH
110
105
12.5 nH
43.0 nH
100
150
140
130
200
Frequency (MHz)
95
18.5 nH
100
200
400
600
1000
90
100
Frequency (MHz)
200
400
600
1000
Frequency (MHz)
Typical Current Derating
120
110
90
80
70
60
50
40
25°C
Percent of rated Irms
100
30
20
10
0
-55 -40
-20
0
20
40
60
80
100
120
140 160
Ambient temperature (°C)
®
Specifications subject to change without notice.
Please check our website for latest information.
1102 Silver Lake Road
Cary IL 60013
© Coilcraft, Inc. 2011
Document ST107-2 Revised 10/24/11
Phone 800-981-0363
Fax 847-639-1508
E-mail cps@coilcraft.com
Web www.coilcraft-cps.com