• 1.

    Operating Temp. Range: The combination of ambient temperature and temperature rise.

  • 2.

    Inductance: Tested at 1kHz, 1 VRMS, Series.

  • 3.

    ISAT: DC current through the winding to cause a 10% (typ) drop in inductance.

  • 4.

    IDC: DC current through the winding to cause a 40°C (typ) temperature rise at 25°C ambient.

  • 5.

    Flammability Standard: Meets UL 94V-0.

  • 6.

    SRF: Values are for reference only.

  • 7.

    Packaging

    • Pieces/Tray: 91
    • Trays/Box: 6
    • Pieces/Box: 546
  • 8.

    Specifications subject to change without prior notice.

Frequently Asked Questions (FAQs)

What inductance values and tolerances does 1D17A provide?

+
1D17A offers 10 µH, 15 µH, 22 µH, and 33 µH variants with ±20% tolerance, allowing designers to trade off between ripple suppression and transient response based on application needs.

What is the saturation current and typical current rating for 1D17A?

+
Depending on the variant, ISAT ranges from about 10–31 A, while the current that causes a 40 °C rise (I_DC) is about 6 A for most variants — suitable for audio output filters and moderate power rails, but not for very high current switching rails.

What does the SRF specification mean for practical use?

+
SRF (Self-Resonant Frequency) defines the upper frequency at which the inductor remains inductive; 1D17A’s SRF (~17–27 MHz) ensures stable performance at audio and low-frequency power-supply frequencies, with minimal parasitic effects.

How does shielding benefit audio and sensitive circuits using 1D17A?

+
Shielding reduces magnetic leakage and radiated EMI, which helps prevent interference, cross-talk and noise in sensitive audio and mixed-signal circuits. Good layout practices further improve performance.

Is 1D17A recommended for high-frequency switching converters?

+
No — 1D17A is optimized for low-frequency/audio-rate filtering and rail stabilization. Its inductance and current ratings make it less suitable for MHz-class switching rails.

What mounting advantages does through-hole offer for 1D17A?

+
Through-hole construction gives strong mechanical anchoring, robust solder joints, and better handling of vibration or mechanical stress — ideal for chassis-mount or durable audio/power assemblies.

How does low DCR affect efficiency and heat generation?

+
Lower DCR reduces copper losses under load, helping maintain efficiency and keeping temperature rise manageable, which is critical for continuous power or audio applications.

What trade-offs should designers be aware of when using 1D17A?

+
While 1D17A offers shielding, stable inductance, and moderate current ratings, its relatively high inductance and modest current capacity limit its use in high-current, high-frequency switching applications.

For what kind of power supplies or audio systems is 1D17A ideal?

+
Class-D audio amplifiers, low-current DC rails, embedded devices, audio peripherals, and any system requiring stable low-frequency filtering with EMI suppression.

What design parameters should be checked when selecting a 1D17A part?

+
Inductance value (for required filtering), current draw (average and peak), ripple current, PCB footprint and layout constraints, EMI sensitivity, and headroom vs. SRF to ensure stable operation.