SDR0302-181KL Bourns Inductor (Other) In Stock
Bourns SDR0302-181KL is a 180 µH ferrite core power inductor in 1211 case size with 5 Ohm DC resistance. Designed for general-purpose and power filtering applications requiring high inductance in a rectangular chip format. Available from stock worldwide with standard lead times.
- Manufacturer
- Bourns
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- SDR0302-181KL Datasheet PDF
- Category
- Inductor
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 180 µH nominal inductance with ferrite core construction for effective low-frequency power supply filtering and energy storage applications
- DC resistance of 5 Ohm in 1211 (3.0 x 2.8mm) case size providing a compact high-inductance solution for space-constrained PCB designs
- General-purpose power inductor rated for broad-temperature operation, RoHS-compliant with lead-free construction for modern PCB assembly
Applications
The SDR0302-181KL 180 µH power inductor is used in DC-DC converter output filters, EMI suppression chokes, and energy storage stages in low-power switching regulators. Its ferrite core construction and 1211 chip package suit applications in portable electronics, IoT sensors, and battery-powered devices requiring efficient power conversion at low switching frequencies. The 5 Ohm DC resistance limits maximum current but provides substantial inductance for low-ripple output filtering in buck and boost converter designs.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 12Weeks |
| YTEOL | 5.7 |
| Case/Size Code | 1211 |
| Construction | Rectangular |
| Core Material | FERRITE |
| DC Resistance | 5Ω |
| Inductance-Nom (L) | 180 µH |
| Inductor Application | POWER INDUCTOR |
| Inductor Type | GENERAL PURPOSE INDUCTOR |
| JESD-609 Code | e2 |
| Number of Functions | 1 |
| Package Height | 2.5mm |
| Package Length | 3mm |
| Package Style | SMT |
| Package Width | 2.8mm |
| Packing Method | TR, EMBOSSED, 13 INCH |
| Rated Current-Max | 0.185A |
| Self Resonance Frequency | 8.5MHz |
| Shape/Size Description | RECTANGULAR PACKAGE |
| Shielded | NO |
| Surface Mount | YES |
| Terminal Finish | SILVER NICKEL TIN |
| Terminal Placement | DUAL ENDED |
| Terminal Shape | ONE SURFACE |
| Test Frequency | 0.1MHz |
| Tolerance | 10% |
| 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 is the nominal inductance of SDR0302-181KL, and in which DC-DC converter topologies can it be used?
SDR0302-181KL has a nominal inductance of 180 µH with ±10% tolerance (K suffix). This high inductance value is suitable for buck, boost, and SEPIC converter output filter inductors operating at switching frequencies between 20 kHz and 200 kHz, where large inductance values minimize output current ripple in low-power portable and IoT power supply designs.
What is the DC resistance of SDR0302-181KL, and how does it affect the maximum usable output current?
SDR0302-181KL has a DC resistance of 5 Ohm, which limits the continuous operating current to avoid excessive power dissipation and self-heating. At 100mA load current, the resistive loss is 50mW, making this inductor suitable for low-current applications such as sensor supply rails, sleep-mode power stages, and auxiliary power domains in portable electronics.
What ferrite core material and case size does SDR0302-181KL use, and why is ferrite preferred for power inductors?
SDR0302-181KL uses a ferrite core in a 1211 rectangular case size measuring approximately 3.0mm x 2.8mm. Ferrite cores provide high magnetic permeability at low to medium frequencies, enabling the 180 µH inductance in a compact chip form factor. Ferrite also exhibits low core loss at 50 kHz to 200 kHz switching frequencies, improving efficiency in DC-DC power conversion stages.
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