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ST146RAA Series

Molded Chip Inductors

ST146RAA Series features exceptional Q and high SRFs, DCR and current carrying characteristics.
  • World’s smallest high-frequency-wirewound chip inductor
  • First performance-optimized 01005 size (metric 0402, 0.4 x 0.2 mm)
  • Extremely high Q, the highest in the market – higher than all thin film type
  • Exceptionally low DCR – lower than all thin film type
  • 36 inductance values from 0.45 nH to 24 nH

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Specifications

Electrical specifications at 25°C.

Part number 1 Inductance (nH) 2 Tolerance (%) 900 MHz 1.7 GHz 2.4 GHz Q min
@ 250 MHz 3 		SRF min (MHz) 4 DCR max (mΩ) 5 Imax at 125°C (mA) 6
Q typ 3 Q typ 3 Q typ 3
ST146RAAN45KRZ 0.45 10 38 48 59 18 5000 60 140
ST146RAAN50KRZ 0.50 10 31 40 48 15 5000 75 90
ST146RAA1N1KRZ 1.1 10 32 50 62 14 5000 95 140
ST146RAA1N2KRZ 1.2 10 36 45 56 16 5000 130 90
ST146RAA1N3KRZ 1.3 10 27 37 46 12 5000 200 50
ST146RAA2N0JRZ 2.0 5 34 45 55 16 5000 125 140
ST146RAA2N2JRZ 2.2 5 33 45 54 15 5000 180 90
ST146RAA2N3JRZ 2.3 5 25 36 46 11 5000 160 100
ST146RAA2N4JRZ 2.4 5 27 36 43 11 5000 260 50
ST146RAA2N5JRZ 2.5 5 25 35 44 10 5000 205 90
ST146RAA3N3JRZ 3.3 5 34 45 52 15 5000 150 140
ST146RAA3N6JRZ 3.6 5 31 42 48 13 5000 230 90
ST146RAA3N8JRZ 3.8 5 27 36 42 12 5000 345 50
ST146RAA3N9JRZ 3.9 5 27 37 42 10 5000 230 100
ST146RAA4N3JRZ 4.3 5 32 42 48 14 5000 190 140
ST146RAA4N7JRZ 4.7 5 34 47 57 16 5000 275 90
ST146RAA5N1JRZ 5.1 5 31 42 50 14 5000 325 70
ST146RAA5N3JRZ 5.3 5 29 40 47 12 5000 430 50
ST146RAA5N6JRZ 5.6 5 28 39 47 12 5000 275 100
ST146RAA5N8JRZ 5.8 5 35 48 58 16 5000 315 100
ST146RAA6N0JRZ 6.0 5 31 42 51 14 5000 340 90
ST146RAA6N2JRZ 6.2 5 33 44 53 14 5000 385 70
ST146RAA6N8JRZ 6.8 5 31 42 48 13 5000 310 100
ST146RAA6N9JRZ 6.9 5 30 40 46 12 5000 510 50
ST146RAA7N5JRZ 7.5 5 28 37 43 12 5000 320 100
ST146RAA7N8JRZ 7.8 5 31 42 49 14 5000 380 90
ST146RAA8N2JRZ 8.2 5 30 40 46 14 5000 445 70
ST146RAA8N8JRZ 8.8 5 30 39 44 13 5000 600 50
ST146RAA9N5JRZ 9.5 5 28 37 44 12 5000 575 70
ST146RAA10NJRZ 10 5 31 40 46 14 5000 520 70
ST146RAA12NJRZ 12 5 27 37 42 12 5000 640 70
ST146RAA13NJRZ 13 5 30 38 43 13 5000 730 50
ST146RAA15NJRZ 15 5 27 35 38 12 5000 820 50
ST146RAA18NJRZ 18 5 27 37 42 12 4500 1020 40
ST146RAA20NJRZ 20 5 28 35 37 12 4300 1300 40
ST146RAA24NJRZ 24 5 28 33 33 12 4000 1550 40
Notes
  1. When ordering, specify termination and screening codes: e.g. ST146RAA24NJRZ.
  2. Inductance measured at 250 MHz using an Agilent 4286A (or equivalent) with a Coilcraft CCF1426 test fixture using the listed correlation.
  3. Q is measured at 250 MHz on an Agilent 4991 (or equivalent) with a Coilcraft CCF1481 test fixture.
  4. SRF is measured on an Agilent 8753ES (or equivalent) with a Coilcraft CCF1406 test fixture.
  5. DCR is measured on a Keithley 580 Micro-ohmmeter (or equivalent) with a Coilcraft CCF1099 test fixture.
  6. Maximum current that can be applied at 125°C.

Termination:

  • R = Matte tin over nickel over silver-platinum glass frit
  • P = Tin-lead (63/37) over tin over nickel over silver platinum-glass frit
  • Q = Tin-silver-copper (95.5/4/0.5) over tin over nickel over silver-platinum-glass frit

Screening:

  • Z = Unscreened
  • H = Coilcraft CP-SA-10001 Group A
  • Screening performed to the document’s latest revision.
  • Custom testing also available.
Environmental
Ambient temperature range:
–40°C to +125°C with Imax current.
Storage temperature range:
Component: –55°C to +140°C.
Packaging: –55°C to +80°C.
Maximum part temperature:
+140°C (ambient + temp rise).
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
See FIT/MTBF Calculations

Performance curves

L vs Frequency

L vs Frequency

Q vs Frequency

Q vs Frequency

Physical characteristics

st146raad.gif

Note: Dimensions are before solder application. For maximum overall dimensions including solder, add 0.0025 in / 0.064 mm to E and 0.006 in / 0.15 mm to A and C.
 
A max B max C max D ref E ref F ref G ref H ref  
0.019 0.011 0.0138 0.0035 0.008 0.006 0.009 0.012 inches
0,47 0,28 0,35 0,09 0,20 0,15 0,23 0,30 mm

General specification

Core Material:
Ceramic
Weight:
0.10 – 0.16 mg
Packaging:
2000 per 7″ reel Paper tape: 8 mm wide, 1.0 mm thick, 4 mm pocket spacing.
Temperature coefficient of inductance:
+25 to +155 ppm/°C

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity).
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles.
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash.