1102 Silver Lake Road
Cary IL 60013
Phone
Fax
800-981-0363
847-639-1508
E-mail
Web
cps@coilcraft.com
www.coilcraft-cps.com
®
© Coilcraft, Inc. 2011
Specifications subject to change without notice.
Please check our website for latest information. Document ST184-1 Revised 04/12/11
Air Core Inductors for Critical Applications ST475RAT
AIR CORE INDUCTORS
■ High Q over a wide range of frequencies
■ Excellent current handling
■ Acrylic top provides a flat surface for pick and place
■ Solder coated leads ensure reliable soldering
Terminations RoHS compliant tin-silver over copper. Other termina-
tions 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.
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
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 500 per 7″reel Plastic tape: 12 mm wide,
0.3 mm thick, 8 mm pocket spacing, 4.2 mm pocket depth
Inductance2 Percent
SRF min4
DCR max5
Imax
Part number1 (nH) tolerance
Q typ3
Qmin3 (GHz) (mOhm) (A)
ST475RAT22N_LZ 22 5,2 135 100 3.2 4.2 3.0
ST475RAT27N_LZ 27 5,2 135 100 2.7 4.0 3.5
ST475RAT33N_LZ 33 5,2 130 100 2.5 4.8 3.0
ST475RAT39N_LZ 39 5,2 135 100 2.1 4.4 3.0
ST475RAT47N_LZ 47 5,2 135 100 2.1 5.6 3.0
ST475RAT56N_LZ 56 5,2 125 100 1.5 6.2 3.0
ST475RAT68N_LZ 68 5,2 120 100 1.5 8.2 2.5
ST475RAT82N_LZ 82 5,2 120 100 1.3 9.4 2.5
ST475RATR10_LZ 100 5,2 115 100 1.2 12.3 1.7
ST475RATR12_LZ 120 5,2 125 100 1.1 17.3 1.5
ST475RATR15_LZ 150 5,2 145 100 0.75 33.0 1.2
1. When ordering, specify tolerance, termination and testing codes:
ST475RATR15GLZ
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) over copper or
S = non-RoHS tin-lead (63/37) over copper.
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 or equivalent with a Coilcraft
CCF1268 test fixture.
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.
1102 Silver Lake Road
Cary IL 60013
Phone
Fax
800-981-0363
847-639-1508
E-mail
Web
cps@coilcraft.com
www.coilcraft-cps.com
®
© Coilcraft, Inc. 2011
Specifications subject to change without notice.
Please check our website for latest information.
AIR CORE INDUCTORS
Document ST184-2 Revised 04/12/11
ST475RAT Air Core Inductors
Typical L vs Frequency Typical Q vs Frequency
0
110
Frequency (MHz)
Inductance (nH)
100 1000 10000
22 nH
39 nH
68 nH
120 nH
250
200
150
100
50
110
Frequency (MHz)
Q factor
100 1000 10000
22 nH
39 nH
68 nH
120 nH
0
250
200
150
100
50
Current Derating
Dimensions are in inches
mm
Suggested
Land Pattern
-40 -20 020406080100 140120
Ambient temperature (°C)
120
110
100
90
80
70
60
50
40
30
20
10
0
Percent of rated rmsI
25°C
