0603 CHIP INDUCTORS
Chip Inductors for Critical Applications
ST312RAA
Small size, exceptional Q and high SRFs make these
inductors ideal for high frequency applications where
size is at a premium. They also have excellent DCR and
current carrying characteristics.
Core material
Ceramic
Terminations
Silver-palladium-platinum-glass frit. Other termina-
tions available at additional cost.
Ambient temperature
–40°C to +125°C with
Imax
current
Maximum part temperature
+140°C (ambient + temp rise)
Storage temperature
Component: –55°C to +140°C.
Tape and reel packaging: –55°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)
+25 to +155 ppm/°C
Moisture Sensitivity Level (MSL)
1 (unlimited floor life at <30°C /
85% relative humidity)
Packaging
2000 per 7″ reel Paper tape: 8 mm wide, 1.0 mm thick,
4 mm pocket spacing
Typical L vs Frequency
200
175
120 nH
150
Inductance (nH)
125
100
75
50
25
0
10
100
1000
68 nH
B
overall
F
C
I
J
I
H
33 nH
A
G
F
12 nH
3.9 nH
10000
E
terminal
D
Terminal wraparound:
approx 0.007/0,18 both ends
Frequency (MHz)
Suggested
Land Pattern
Typical Q vs Frequency
120
110
100
90
80
A
max
0.071
3.9 nH
12 nH
B
max
0.044
1,12
C
max
1,02
D
ref
0,38
E
0,76
F
0,33
G
0,86
H
1,02
I
0,64
J
0,64
0.040 0.015 0.030 0.013 0.034 0.040 0.025 0.025
1,80
Note: Dimensions are before optional solder application. For maximum
overall dimensions including solder, add 0.0025 in / 0,064 mm to
B
and 0.006 in / 0,15 mm to
A
and
C.
Q Factor
70
60
50
40
30
20
10
0
1
10
100
1000
10000
33 nH
68 nH
120 nH
Frequency (MHz)
®
Document ST195-1 Revised 05/16/17
1102 Silver Lake Road
Cary, IL 60013
Phone 800-981-0363
Fax 847-639-1508
Email cps@coilcraft.com
www.coilcraft-cps.com
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specifications subject to change without notice.
Please check our web site for latest information.
© Coilcraft, Inc. 2017
0603 CHIP INDUCTORS
ST312RAA Series (0603)
Part number
1
ST312RAA1N6JLZ
ST312RAA1N8JLZ
ST312RAA2N2JLZ
ST312RAA3N3_LZ
ST312RAA3N6_LZ
ST312RAA3N9_LZ
ST312RAA4N3_LZ
ST312RAA4N7_LZ
ST312RAA5N1_LZ
ST312RAA5N6_LZ
ST312RAA6N8_LZ
ST312RAA7N5_LZ
ST312RAA8N2_LZ
ST312RAA8N7_LZ
ST312RAA9N5_LZ
ST312RAA10N_LZ
ST312RAA11N_LZ
ST312RAA12N_LZ
ST312RAA15N_LZ
ST312RAA16N_LZ
ST312RAA18N_LZ
ST312RAA22N_LZ
ST312RAA23N_LZ
ST312RAA24N_LZ
ST312RAA27N_LZ
ST312RAA30N_LZ
ST312RAA33N_LZ
ST312RAA36N_LZ
ST312RAA39N_LZ
ST312RAA43N_LZ
ST312RAA47N_LZ
ST312RAA51N_LZ
ST312RAA56N_LZ
ST312RAA68N_LZ
ST312RAA72N_LZ
ST312RAA82N_LZ
ST312RAAR10_LZ
ST312RAAR11_LZ
ST312RAAR12_LZ
ST312RAAR15_LZ
ST312RAAR18_LZ
ST312RAAR20_LZ
ST312RAAR21_LZ
ST312RAAR22_LZ
ST312RAAR25_LZ
ST312RAAR27_LZ
ST312RAAR33_LZ
ST312RAAR39_LZ
Inductance
2
(nH)
1.6 @ 250 MHz
1.8 @ 250 MHz
2.2 @ 250 MHz
3.3 @ 250 MHz
3.6 @ 250 MHz
3.9 @ 250 MHz
4.3 @ 250 MHz
4.7 @ 250 MHz
5.1 @ 250 MHz
5.6 @ 250 MHz
6.8 @ 250 MHz
7.5 @ 250 MHz
8.2 @ 250 MHz
8.7 @ 250 MHz
9.5 @ 250 MHz
10 @ 250 MHz
11 @ 250 MHz
12 @ 250 MHz
15 @ 250 MHz
16 @ 250 MHz
18 @ 250 MHz
22 @ 250 MHz
23 @ 250 MHz
24 @ 250 MHz
27 @ 250 MHz
30 @ 250 MHz
33 @ 250 MHz
36 @ 250 MHz
39 @ 250 MHz
43 @ 250 MHz
47 @ 200 MHz
51 @ 200 MHz
56 @ 200 MHz
68 @ 200 MHz
72 @ 150 MHz
82 @ 150 MHz
100 @ 150 MHz
110 @ 150 MHz
120 @ 150 MHz
150 @ 150 MHz
180 @ 100 MHz
200 @ 100 MHz
210 @ 100 MHz
220 @ 100 MHz
250 @ 100 MHz
270 @ 100 MHz
330 @ 100 MHz
390 @ 100 MHz
Percent
tolerance
5
5
5
5,2
5,2
5,2
5,2
5,2
5,2
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2,1
5,2
5,2
5,2
5,2
5,2
5,2
5,2
Q
min
3
26
21
13
35
18
20
29
18
20
25
28
23
26
27
22
28
26
29
28
29
29
31
39
36
32
32
33
32
36
28
35
38
37
35
35
29
28
30
28
28
25
25
26
25
25
26
26
27
900 MHz
L typ Q typ
1.67
49
1.83
35
2.22
31
3.31
75
3.72
53
3.95
49
4.32
50
4.72
47
4.93
47
5.77
63
6.75
60
7.70
60
8.25
82
8.86
62
9.70
59
10.0
66
11.0
53
12.3
72
15.4
64
16.2
55
18.7
70
22.8
73
24.1
71
24.5
45
29.2
74
31.4
47
36.0
67
39.4
47
42.7
60
47.0
44
52.2
62
55.5
69
62.5
56
80.5
54
82.0
53
96.2
54
124
49
138
43
166
39
250
25
305
22
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.7 GHz
L typ Q typ
1.65
63
1.86
50
2.24
44
3.38
88
3.71
65
3.96
67
4.33
70
4.75
57
4.95
56
6.05
80
7.10
81
7.82
65
8.37
87
9.32
58
9.92
61
10.6
83
11.5
56
13.5
83
16.8
89
17.3
52
21.4
69
26.1
71
28.0
67
28.7
39
34.6
65
39.9
28
49.5
42
52.7
24
60.2
40
64.9
21
77.2
35
82.2
34
97.0
26
168
21
135
20
177
21
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
SRF
min
4
(MHz)
>5000
>5000
>5000
>5000
>5000
>5000
>5000
>5000
>5000
4760
4660
4320
3880
3680
4100
3860
3640
3220
3020
3040
2680
2380
2380
2380
2380
2240
1900
1960
1740
1580
1560
1560
1480
1380
1360
1300
1140
1080
1020
900
820
800
780
760
740
700
620
580
DCR
max
5
(Ohms)
0.022
0.045
0.240
0.045
0.063
0.080
0.063
0.116
0.140
0.075
0.110
0.106
0.115
0.109
0.135
0.130
0.130
0.130
0.170
0.170
0.170
0.190
0.190
0.190
0.220
0.220
0.220
0.250
0.250
0.280
0.280
0.300
0.310
0.340
0.490
0.540
0.580
0.610
0.650
0.915
1.25
1.98
2.06
2.10
3.55
2.30
3.89
4.35
Imax
(mA)
700
700
100
700
700
700
700
605
510
700
700
700
700
700
700
700
700
620
600
600
600
560
560
560
530
500
500
460
460
440
440
420
420
410
340
340
310
310
270
250
210
170
160
160
120
150
100
100
Color
code
Red
Black
Yellow
Blue
Red
Brown
Orange
Violet
Green
Black
Red
Brown
Orange
Yellow
Blue
Orange
Gray
Yellow
Green
White
Blue
Violet
Orange
Black
Gray
Brown
White
Red
Black
Orange
Brown
Blue
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
Black
Green
Gray
Brown
Violet
Red
Blue
Yellow
1. When ordering, specify
tolerance, termination
and
testing
codes:
ST312RAAR39JLZ
Tolerance: F
= 1%
G
= 2%
J
= 5%
Termination: L
= Silver-palladium-platinum glass frit.
Special order:
S
= Tin-lead (63/37) over silver-platinum-glass frit.
T
= Tin-silver-copper (95.5/4/0.5) over silver-platinum-
glass frit.
R
= Tin over nickel over silver-platinum-glass frit.
P
= Tin-lead (63/37) over tin over nickel over silver-plati-
num-glass frit.
Q
= Tin-silver-copper (95.5/4/0.5) over tin over nickel over
silver-platinum-glass frit.
Testing:
Z
= Unscreened
H
= Group A screening per Coilcraft CP-SA-10001
Screening performed to the document’s latest revision
Custom screening also available
®
2. Inductance measured using a Coilcraft SMD-A test fixture and
Coilcraft-provided correlation pieces with an Agilent/HP 4286A imped-
ance analyzer or equivalent.
3. Q measured at the same frequency as inductance using an Agilent/
HP 4291A with an Agilent/HP 16197A test fixture or equivalents.
4. SRF measured using an Agilent/HP 8753ES network analyzer and a
Coilcraft CCF1232 test fixture.
5. DCR measured on a Keithley 580 micro-ohmmeter and a Coilcraft
CCF1010 test fixture.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Document ST195-2 Revised 05/16/17
1102 Silver Lake Road
Cary, IL 60013
Phone 800-981-0363
Fax 847-639-1508
Email cps@coilcraft.com
www.coilcraft-cps.com
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specifications subject to change without notice.
Please check our web site for latest information.
© Coilcraft, Inc. 2017
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