SPT30L-353MLD COILCRAFT Inductor (Other) In Stock
Coilcraft SPT30L-353MLD is a 35 µH, 1.6 A general-purpose power inductor with 20% tolerance, 12 MHz self-resonant frequency, and only 0.166 Ω DC resistance in a 4444 case size with powdered iron core. Designed for DC-DC converter filtering and energy storage in power supply designs. Available from authorized distributors with worldwide shipping.
- Manufacturer
- COILCRAFT
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- SPT30L-353MLD Datasheet PDF
- Category
- Inductor
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 35 µH inductance with 1.6 A current rating and low 0.166 Ω DC resistance for efficient energy storage in power inductor applications
- Powdered iron core material provides good saturation characteristics and stable inductance under load in DC-DC converter designs
- 12 MHz self-resonant frequency in a 4444 case size enables use in switching power supply filter stages up to medium switching frequencies
Applications
SPT30L-353MLD is used as an output filter inductor in DC-DC buck and boost converters operating at switching frequencies up to 12 MHz, where its 35 µH inductance and 1.6 A current rating provide effective ripple current reduction. The low 0.166 Ω DC resistance minimizes power dissipation, making it suitable for efficiency-sensitive power supplies in industrial equipment, embedded computing, and consumer electronics. Its powdered iron core offers good overload tolerance for circuits with dynamic load transients.
Specifications
| Pbfree Code | Yes |
| YTEOL | 6.9 |
| Case/Size Code | 4444 |
| Core Material | POWERED IRON |
| DC Resistance | 0.166Ω |
| Inductance-Nom (L) | 35 µH |
| Inductor Application | POWER INDUCTOR |
| Inductor Type | GENERAL PURPOSE INDUCTOR |
| JESD-609 Code | e2 |
| Number of Functions | 1 |
| Package Height | 9.5mm |
| Package Length | 11.18mm |
| Package Style | SMT |
| Package Width | 11.05mm |
| Packing Method | TR, Embossed Plastic, 13 Inch |
| Rated Current-Max | 1.6A |
| Self Resonance Frequency | 11MHz |
| Shape/Size Description | RECTANGULAR PACKAGE |
| Shielded | YES |
| Surface Mount | YES |
| Terminal Finish | Tin/Silver (Sn/Ag) |
| Terminal Placement | DUAL ENDED |
| Terminal Shape | WRAPAROUND |
| Test Frequency | 0.1MHz |
| Tolerance | 20% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8504.50.80.00 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What inductance, current rating, and DC resistance does SPT30L-353MLD provide for power supply designs?
SPT30L-353MLD offers 35 µH nominal inductance with a 1.6 A current rating and a DC resistance of only 0.166 Ω. The 20% tolerance on inductance is typical for general-purpose power inductors and is compatible with most DC-DC converter designs that include feedback regulation, ensuring stable output ripple performance across production units.
What switching frequency range is SPT30L-353MLD suitable for in DC-DC converter filter stages?
SPT30L-353MLD has a self-resonant frequency of 12 MHz, which sets the practical upper frequency limit for its use as a filter inductor. It is best suited for DC-DC converters switching between 100 kHz and a few megahertz, where the 35 µH inductance provides adequate energy storage and ripple attenuation without the inductor entering capacitive behavior near resonance.
How does the powdered iron core of SPT30L-353MLD compare to ferrite for high-current filtering applications?
The powdered iron core of SPT30L-353MLD provides a softer saturation characteristic compared to ferrite, meaning inductance degrades more gradually as current approaches the 1.6 A rating rather than dropping abruptly. This makes it more forgiving in circuits with load transients or peak currents that momentarily exceed the steady-state rating, at the cost of slightly higher core losses at elevated switching frequencies above 1 MHz compared to ferrite alternatives.
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