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D1787 Series

SMT Power Inductor for Texas Instruments LM5115DC

RoHS compliant
D1787 Series high-current, high-inductance power inductors feature a flat-wire construction, resulting in exceptionally low DC resistance. They come in a wide range of sizes and inductance values for POL, VRM, VRD, and other high power applications.
  • Developed for Texas Instruments LM5115DC Post Regulator Controller
  • Core shape allows excellent heat dissipation.
  • Rugged flat wire construction
  • Exceptionally low DC resistance
  • Ferrite core for flat L vs. I characteristics
  • Magnetically shielded to minimize EMI

Buy Now:
Count Unit price
1 $4.39
250 $3.77
500 $3.28
1000 $2.55
2500 $2.19
5000 $2.02

For high volume or non-stock items, request a quote.

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Electrical specifications at 25°C.

Part number Inductance (µH) 1
(Tolerance: ±20%)
DCR max (mΩ) 2 SRF typ (MHz) 3 Irms (A) 4
D1787-AL 33 2.8 9.0 23.0
  1. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc using a Coilcraft SMD-D fixture in an Agilent/HP 4263B impedance analyzer or equivalent.
  2. DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  3. SRF measured using an Agilent/HP 8753D network analyzer and a Coilcraft SMD-D test fixture. Details
  4. Irms: Current that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Temperature derating curves.


  • RoHS tin-silver (96.5/3.5) over copper.
RoHS compliant
Ambient temperature range:
−40°C to +85°C with Irms current
Storage temperature range:
Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
Maximum part temperature:
+125°C (Ambient + temperature rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):

Performance curves

Inductance vs. Current

Inductance vs. Frequency

Temperature Rise vs. Current

Physical characteristics


General specification

Core Material:
34.9 g
25 parts per tray


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.

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