Datasheet 3D Models
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Electrical specifications at 25°C.

ML439RAT Series

Part number 1 Turns Inductance (nH) 2 Tolerance (%) Q min
@ 150 MHz 3
SRF min (GHz) 4 DCR max (mΩ) 5 Imax (A)
ML439RAT8N0_LZ 3 8.0 5,2 140 5.0 2.6 4.0
  1. When ordering, please specify tolerance and testing code: e.g. ML470RAT43NGLZ.
  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.


  • G = 2%
  • J = 5%
  • = 10%
Ambient temperature range:
–55°C to +125°C with Imax current.
Storage temperature range:
Component: –55°C to +155°C.
Packaging: –40°C to +80°C.
Maximum part temperature:
+155°C (ambient + temp rise).
Failures in Time (FIT) / Mean Time Between Failures (MTBF):

Performance curves

L vs Frequency

Q vs Frequency

Physical characteristics

Dimensions are in  inchesmm

General specification

48 – 188 mg
ML439RAT: 700/7″ reel Plastic tape: 12 mm wide, 0.32 mm thick, 8 mm pocket spacing, 3.3 mm pocket depth. 
ML470RAT: 500/7″ reel Plastic tape: 16 mm wide, 0.28 mm thick, 8 mm pocket spacing, 3.4 mm pocket depth.
Temperature coefficient of inductance:
+5 to +70 ppm/°C.


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.