The **SS11VL-R04520** is a common mode choke coil manufactured by KEMET (specifically within the SS series). It is designed for noise suppression in power supply circuits. --- ## 1. Technical Specifications The part number encodes specific electrical characteristics. Below are the primary specifications for this component: | Parameter | Value | | :--- | :--- | | **Inductance (Min)** | 52.0 mH | | **Rated Current (AC)** | 0.4 A | | **DC Resistance (Max)** | 1.80 $\Omega$ | | **Rated Voltage** | 250 VAC | | **Operating Temp Range** | -25°C to +120°C | | **Mounting Type** | Through-hole (PCB) | --- ## 2. Key Features & Construction * **High Permeability Core:** Uses a specialized ferrite core to achieve high inductance in a compact vertical form factor. * **Split Bobbin Design:** The "VL" designation typically refers to a vertical mount with a split bobbin. This design provides excellent separation between the two coils, enhancing insulation and reducing parasitic capacitance. * **Compact Footprint:** The "11" in the series refers to the approximate core size, making it suitable for high-density power supply boards. --- ## 3. Applications The SS11VL-R04520 is primarily used as an **EMI (Electromagnetic Interference) Filter**. Common applications include: 1. **Switch Mode Power Supplies (SMPS):** Filtering out high-frequency noise generated by switching transistors. 2. **LED Lighting:** Ensuring compliance with electromagnetic compatibility (EMC) standards. 3. **Consumer Electronics:** Used in AC adapters for laptops, televisions, and home appliances. 4. **Audio-Visual Equipment:** Preventing power line noise from affecting signal integrity. --- ## 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **SS:** Series name (Compact Common Mode Choke). * **11:** Core size dimension. * **VL:** Vertical type mounting configuration. * **R04:** Rated current (0.4 Amperes). * **520:** Nominal inductance value (520 $\times$ 10² $\mu$H = 52 mH).