ST312RAM Datasheet, PDF (1/2 Pages) Coilcraft lnc. – Chip Inductors for Critical Applications

0603 CHIP INDUCTORS
Chip Inductors for Critical Applications ST312RAM
■ Higher inductance values than ceramic 0603 inductors
■ Heavier gauge wire for low DCR
■ Ferrite construction for high current handling
■ Inductance values from 15 nH to 10 µH
 Inductance^{2 Impedance typ (Ohms)}
  _{Part number}1
±5% (nH)  Q min³
100 MHz   500 MHz
ST312RAM15NJRZ
15 @ 7.9 MHz 10@ 7.9 MHz
10
42
ST312RAM33NJRZ
33 @ 7.9 MHz 10@ 7.9 MHz
19
90
ST312RAM111JRZ
110 @ 7.9 MHz 12 @ 7.9 MHz
70
350
ST312RAM121JRZ
120 @ 7.9 MHz 12 @ 7.9 MHz
76
410
ST312RAM241JRZ
240 @ 7.9 MHz 12 @ 7.9 MHz
140
810
ST312RAM271JRZ
ST312RAM471JRZ
ST312RAM561JRZ
ST312RAM681JRZ
ST312RAM821JRZ
270 @ 7.9 MHz 12 @ 7.9 MHz
173
470 @ 7.9 MHz 12 @ 7.9 MHz
306
560 @ 7.9 MHz 12 @ 7.9 MHz
371
680 @ 7.9 MHz 12 @ 7.9 MHz
420
820 @ 7.9 MHz 12 @ 7.9 MHz
507
1023
2253
3180
3620
3300
ST312RAM102JRZ
ST312RAM222JRZ
ST312RAM472JRZ
ST312RAM103JRZ
1000 @ 7.9 MHz
2200 @ 7.9 MHz
4700 @ 7.9 MHz
10000 @ 2.5 MHz
13 @ 7.9 MHz
12 @ 2.5 MHz
12 @ 7.9 MHz
9 @ 2.5 MHz
663
5220
2100
1400
9823
129
220
150
  _{ SRF min}4 _{ DCR max}5
(MHz)
(Ohms)
2800
1840
980
920
720
0.023
0.028
0.060
0.089
0.12
600
0.22
460
0.37
400
0.49
420
0.46
260
0.58
320
0.84
65
1.10
45
1.50
30
4.50
Imax
(A)
1.7
1.7
1.4
1.4
0.68
0.68
0.61
0.53
0.53
0.53
0.40
0.40
0.40
0.40
Color
code
Yellow
Red
Red
Black
Violet
Brown
Orange
Blue
Orange
Green
Black
Red
Yellow
Gray
1. When ordering, please specify termination and testing codes:
ST312RAM103JRZ
Termination: R = RoHS compliant matte tin over nickel over silver-
platinum-glass frit.
Special order:
Q = RoHS tin-silver-copper (95.5/4/0.5) over tin over
nickel over silver-platinum-glass frit or
P = non-RoHS tin-lead (63/37) over tin over nickel over
silver-platinum-glass frit.
Testing:
Z = COTS
H = Screening per Coilcraft CP-SA-10001
2. Inductance measured using a Coilcraft SMD-A fixture in an Agilent/
HP 4286A impedance analyzer or equivalent with Coilcraft-provided
correlation pieces.
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 or
equivalent and a Coilcraft SMD-D test fixture.
5. DCR measured on a Keithley 580 micro-ohmmeter or equivalent and a
Coilcraft CCF1010 test fixture.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Core material Ferrite
Terminations  Matte tin over nickel over silver-platinum-glass frit.
Weight  4.3 – 5.7 mg
Ambient temperature  –40°C to +85°C with Irms current, +85°C to
+100°C with derated current
Storage temperature  Component: –55°C to +100°C.
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)  +50 to +300 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
© Coilcraft, Inc. 2012
®
Specifications subject to change without notice.
Please check our website for latest information. Document ST773-1  Revised 10/28/11
1102 Silver Lake Road
Cary IL 60013
Phone [phone]
Fax [phone]
E-mail [e-mail]
Web www.coilcraft-cps.com