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0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

HA3778-AL Series

Power Inductor for TI LM315x Switching Controllers

RoHS compliant

Coilcraft low-profile HA3778-AL Series shielded power inductors are great for high current DC-DC converters and VRM/VRD controllers. High-temperature, low-loss materials do not exhibit thermal aging.

  • Designed for Texas Instruments LM315x SIMPLE SWITCHER®
  • L1 on TI Demonstration Board LM3152-3.3 and Reference Design RD 164
  • Soft saturation makes it ideal for use in multi-phase VRM/VRD regulators
  • Flat wire construction for low DCR
  • No thermal aging
Buy Now:
Count Unit price
1 $2.35
200 $2.04
500 $1.78
1000 $1.39
2500 $1.19
5000 $1.09

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

. in stock, ready to ship today.
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Electrical specifications at 25°C.

Part number 1 Inductance (µH) 2
(Tolerance: ±20%)
DCR ± 8% (mΩ) 3 SRF typ (MHz) 4 Isat (A) 5 Irms (A) 6
HA3778-AL_ 1.65 2.53 55.0 17.0 20
  1. When ordering, please specify termination and packaging codes: e.g. HA3778-ALC
  2. Inductance measured at 500 kHz, 0.1 Vrms, 0 Adc using a Coilcraft SMD-A fixture in an Agilent/HP 4284A LCR meter or equivalent.
  3. DCR measured at 25°C on a micro-ohmmeter. For other operating temperature use this DCR at Temperature calculator. 
  4. SRF measured on an Agilent/HP 8753ES
  5. Isat: DC current at which inductance drops 30% (typ) from its value without current. Temperature derating curves.
  6. Irms: Current that causes 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Temperature derating curves.


  • L = RoHS compliant tin-silver (96.5/3.5) over copper.
  • T = RoHS tin-silver-copper (95.5/4/0.5). (Special order, added cost)
  • S = non-RoHS tin-lead (63/37). (Special order, added cost)


  • C = 7" reel, machine-ready reel
    EIA-481 embossed plastic tape (100 parts per full reel).
  • B = Less than full reel
    In tape, but not machine-ready. To have a leader and trailer added ($25 charge), use code letter C instead.
  • D = 13" reel, machine-ready reel
    EIA-481 embossed plastic tape. Factory order only, not stocked (500 parts per full reel).
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)

Performance curves

Inductance vs Current

Inductance vs Frequency

Temperature Rise versus Current

Physical characteristics


Tape and Reel specification

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_y-(2).gif
100 500* 178/330 60/100 13 30,4 24,4 24 16 4 2 7,5 0,4
* Special order

General specification

Core Material:
3.44 g
100/7″ reel; 500/13″ reel Plastic tape: 24 mm wide, 0.4 mm thick, 16 mm pocket spacing, 7.5 mm pocket depth


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. More info.

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