SDR0302-560KL Bourns Inductor (Other) In Stock
Bourns SDR0302-560KL is a 56 µH ferrite-core power inductor in a 1211 case with 1.45 Ω DC resistance for general-purpose power filtering and energy storage. Designed for surface mount assembly with RoHS-compliant, lead-free construction. In stock at authorized distributors worldwide with competitive pricing and standard shipping.
- Manufacturer
- Bourns
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- SDR0302-560KL 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
- 56 µH ferrite-core inductance with only 1.45 Ω DCR, balancing high energy storage with low resistive power loss in switching power supply designs
- 1211 case code (3.0 × 2.8 mm) rectangular SMT footprint enables compact power inductor placement on space-constrained PCBs
- RoHS-compliant lead-free construction meets global environmental regulations for consumer, industrial, and automotive electronics assemblies
Applications
The SDR0302-560KL is well-suited for output filtering and energy storage in DC-DC boost and buck converters operating at switching frequencies where 56 µH provides effective ripple attenuation. Its low 1.45 Ω DC resistance minimizes I²R losses, making it appropriate for low-power embedded systems and battery-powered portable devices. The 1211 SMT package integrates cleanly into automated reflow assembly lines for industrial sensor modules and IoT gateways.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 12Weeks |
| YTEOL | 6.25 |
| Case/Size Code | 1211 |
| Construction | Rectangular |
| Core Material | FERRITE |
| DC Resistance | 1.45Ω |
| Inductance-Nom (L) | 56 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 | 0.34A |
| Self Resonance Frequency | 16MHz |
| 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
How does the 1.45 Ω DCR of the SDR0302-560KL affect power efficiency in a DC-DC converter design?
At 1.45 Ω DC resistance, the SDR0302-560KL introduces resistive losses equal to I² × 1.45 W for each ampere of current flowing through the inductor. For example, at 100 mA the copper loss is only 14.5 mW, keeping thermal rise negligible. Designers targeting efficiency above 90% in low-current buck or boost converters should verify that this DCR stays within the power budget at their specific load current.
In which switching converter topologies is 56 µH inductance of the SDR0302-560KL most effective for ripple filtering?
A 56 µH inductance provides significant impedance at switching frequencies from 50 kHz to 500 kHz, making the SDR0302-560KL effective in synchronous buck converters and flyback transformers operating in that range. At 100 kHz, the inductive reactance is approximately 35 Ω, which attenuates high-frequency ripple on the output rail and reduces output capacitor stress, supporting stable regulation in 5 V or 12 V rails.
What does the 1211 case code tell procurement engineers about SDR0302-560KL's physical dimensions and PCB pad requirements?
The 1211 case code corresponds to a 3.0 mm × 2.8 mm rectangular footprint. Procurement and layout engineers can use this code to confirm land-pattern compatibility with standard IPC-7351 SMT pads for that size. The lead-free (L suffix) construction ensures compliance with RoHS directives, which is a procurement prerequisite for EU market products and many OEM supply chain quality standards.
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