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Coilcraft CPS
Close up of WA8721
3D Model Datasheet DCDC Tool

WA8721 Ultra-Low Loss

Shielded Power Inductors

RoHS compliant halogen free AEC-Q flag
  • Ultra low profile — only 1.2 mm high
  • Exceptionally low DCR and ultra low AC losses for high switching
  • Superior current handling with soft saturation characteristics
  • RoHS-compliant, halogen free. 260°C compatible. Tin-silver over copper terminations
  • AEC-Q200 Grade 1 (−40°C to +125°C)
  • COTS Plus tin-silver-copper and tin-lead terminations available

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Specifications

Electrical specifications at 25°C.

Part number 1 Inductance (nH) 2
(Tolerance: ±20%) 		DCR (mΩ) 3 SRF typ (MHz) 4 Isat (A) 5 Irms (A) 6
typ max 10% drop 20% drop 30% drop 20°C rise 40°C rise
WA8721-AE_ 60 4.1 4.8 485 8.0 13.8 19.3 12.8 17.2
Notes
  1. When ordering, please specify termination and packaging codes: e.g. WA8721-AEC
  2. Inductance tested at 1 MHz, 0.1 Vrms, 0 Adc.
  3. DCR measured at 25°C on a micro-ohmmeter. For other operating temperatures, use this DCR at Temperature calculator.
  4. SRF measured using an Agilent/HP 4395A or equivalent.
  5. Isat: DC current at 25°C that causes the specified inductance drop from its value without current. Temperature derating curves.
  6. Irms: Current that causes the specified temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Temperature derating curves.
    Irms testing was performed on 0.75 inch wide × 0.25 inch thick copper traces in still air. Temperature rise is highly dependent on many factors including pcb land pattern, trace size, and proximity to other components. Therefore temperature rise should be verified in application conditions.

Termination:

  • E = RoHS compliant tin-silver over copper terminations.
  • S = non-RoHS tin-lead (63/37). (Special order, added cost)

Packaging:

  • C = 7″ machine-ready reel. EIA-481 embossed plastic tape (1000 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
  • D = 13″ machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (3500 parts per full reel).
Environmental
Environmental:
RoHS compliant , halogen free
Ambient temperature range:
–40°C to +125°C with (40°C rise) Irms current
Storage temperature range:
Component: −55°C to +165°C
Tape and reel packaging: −55°C to +80°C
Maximum part temperature:
+165°C (Ambient + temperature rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
See FIT/MTBF Calculations

Physical characteristics

wa8721d.gif

dims_inches_mm.gif

Tape and Reel specification

tapereel_pl.gif
 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
7" (178 mm) 13" (330 mm) A B C D E W P Po P1 H T part_or_ac.gif
1000 3500* 178/330 60/100 13 18,4 12,4 12 8 4 2 1,80 0,23

General specification

Core Material:
Composite
Packaging:
1000/7″ reel; 3500/13″ reel Plastic tape: 12 mm wide, 0.23 mm thick, 8 mm pocket spacing, 1.8 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

Related product series

XEL3515 Series

XEL3520 Series

XEL3530 Series

XEL4012, 4014 Series

XEL4012V, 4014V High Voltage

XEL4020 Series

XEL4020V Series Ultra-Low Loss

XEL4030 Series

XEL4030V Series Ultra-Low Loss

XEL5020 Series

XEL5030 Series

XEL5050 Series

XEL6030 Series

XEL6060 Series

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