## SD14-220-R Technical Overview The **SD14-220-R** is a high-power, low-profile shielded drum core inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the SD14 series, designed specifically for applications requiring high power density and electromagnetic interference (EMI) shielding. --- ### Key Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 22.0 µH | | **Tolerance** | ±20% | | **Rated Current (Irms)** | 1.15 A | | **Saturation Current (Isat)** | 1.48 A | | **DC Resistance (DCR)** | 0.134 Ω (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | Non-standard SMD (approx. 5.2 x 5.2 x 1.45 mm) | --- ### Electronic Characteristics #### 1. Shielded Construction The "SD" in the part number stands for **Shielded Drum**. The inductor features a ferrite core with a magnetic shield. This minimizes EMI leakage, making it ideal for high-density boards where components are placed close together. #### 2. Power Handling * **Irms (Root Mean Square Current):** This represents the continuous DC current that will cause an approximate 40°C temperature rise in the part. * **Isat (Saturation Current):** This is the peak current at which the inductance drops by a specific percentage (usually 30%). For the SD14-220-R, this is 1.48A. #### 3. Low Profile (Form Factor) The "14" in the series refers to the height (approximately 1.45 mm). This "Ultra-Low Profile" design is critical for modern mobile electronics, thin power modules, and handheld devices. --- ### Common Applications The SD14-220-R is typically found in power management circuits, including: * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Mobile Devices:** Smartphones, tablets, and wearables. * **Computing:** Flash memory storage and portable media players. * **LED Drivers:** Small-scale lighting power supplies. --- ### Part Number Breakdown `SD` `14` - `220` - `R` * **SD:** Shielded Drum Core Series * **14:** Size code (1.45 mm height) * **220:** Inductance value (22 followed by zero zeros = 22 µH) * **R:** RoHS compliant