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RA7338 Series

Power Inductor for Microchip 1600W Bus Balancer

RoHS compliant halogen free AEC-Q flag
Coilcraft AEC-Q200 Grade-1 RA7338 Series power inductors are ideal for automotive applications and other high-temperature environments. RA7338 Series are designed for high-efficiency power supplies requiring high current and high inductance.
 
  • Developed for Microchip 1600W Bus Balancer Reference Design
  • Flat wire windings provide extremely low DC and AC resistance. 
  • Low loss ferrite cores provide flat L vs I
  • Magnetic shielding to minimize EMI
  • Vertical (TH) mounting for rugged board attachment
  • Shield has solderable tabs for additional mounting stability
  • AEC-Q200 Grade 1 (−40°C to +125°C) 

Specifications

Electrical specifications at 25°C.

Part number Inductance (µH) 1
(Tolerance: ±10%)
DCR (mΩ) 2 SRF typ (MHz) 3 Isat (A) 4 Irms (A) 5
min max typ max 10% drop 20% drop 30% drop 20°C rise 40°C rise
RA7338-AE 18 24 0.68 0.75 9.3 19.0 22.0 24.0 34.0 44.5
Notes
  1. Inductance measured at 100 kHz, 0.1 Vrms, using an Agilent/HP 4192A LCR meter or equivalent.
  2. DCR measured at 25°C on a Keithley 580 micro-ohmmeter or equivalent. For other operating temperatures, use this DCR at Temperature calculator.
  3. SRF measured using an Agilent/HP 8753ES network analyzer.
  4. Isat: DC current at 25°C that causes the specified inductance drop from its value without current. Temperature derating curves.
  5. 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.

Termination:

  • RoHS compliant tin-silver over copper.
Environmental
Environmental:
RoHS compliant , halogen free
Ambient temperature range:
–40°C to +125°C with Irms current
Storage temperature range:
Component: –40°C to +165°C.
Tray packaging: –40°C to +80°C
Maximum part temperature:
+165°C (ambient + temp rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Performance curves

Inductance vs Current

Inductance vs Frequency

Physical characteristics

ra7338d.gif
dims_inches_mm.gif

General specification

Core Material:
Ferrite
Weight:
109 g
Packaging:
9 parts per tray

Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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