The term **3H30** most commonly refers to a specific type of **Power Inductor** (specifically a Surface Mount Device or SMD inductor) or can be found as a suffix for certain high-frequency magnetic cores. Below is a detailed breakdown of the electronic specifications and characteristics associated with the 3H30 series components. --- ## 1. Component Overview The 3H30 is generally categorized as a **Shielded Power Inductor**. These are designed to handle high currents while minimizing Electromagnetic Interference (EMI) in compact electronic circuits. ### Key Specifications | Parameter | Typical Value / Range | | :--- | :--- | | **Inductance Range** | 1.0µH to 100µH | | **Current Rating** | 0.5A to 3.5A (depending on inductance) | | **Tolerance** | ±20% (M) | | **Operating Temperature** | -40°C to +125°C | | **Core Material** | Ferrite | | **Mounting Type** | SMD (Surface Mount Device) | --- ## 2. Technical Construction The "3H30" designation often implies the physical dimensions and the material characteristics of the part: * **Size (3015/3012 context):** The "3" usually denotes a width of approximately 3.0mm. * **Shielding:** Most 3H30 inductors feature a magnetic resin shielding. This reduces the "leakage flux," preventing the inductor from interfering with nearby sensitive components on the PCB. * **Core Material (3H Series):** In materials science (specifically Ferroxcube standards), **3H** refers to a Manganese-Zinc (MnZn) ferrite material optimized for medium frequency applications with high initial permeability. --- ## 3. Applications These parts are widely used in power management modules where space is limited and efficiency is critical. 1. **DC-DC Converters:** Used in "Buck" or "Boost" converters to store energy. 2. **Mobile Electronics:** Found in smartphones and tablets for battery power regulation. 3. **LED Drivers:** Used to maintain constant current for high-brightness LEDs. 4. **Noise Filtering:** Acting as a low-pass filter to smooth out ripples in power lines. --- ## 4. Part Numbering Example If you see a part labeled `NR3H30-2R2M`, here is how to decode it: | Code | Meaning | | :--- | :--- | | **NR** | Series Name (e.g., Magnetic Resin Shielded) | | **3H30** | Package Size (approx 3.0mm x 3.0mm x 1.5-3.0mm) | | **2R2** | Inductance Value (2.2 microhenries) | | **M** | Tolerance (±20%) | ---