The part number **187MDCL152KHG** refers to a high-voltage, high-capacitance ceramic capacitor, typically used in industrial and power electronics. Based on standard industry nomenclature (likely from manufacturers like Holy Stone or similar high-voltage ceramic specialists), here is the breakdown of its specifications. ### 1. Technical Specifications | Parameter | Specification | Description | | :--- | :--- | :--- | | **Capacitance** | 1.5 nF (1500 pF) | Defined by the code "152" (15 followed by two zeros). | | **Tolerance** | ±10% | Indicated by the letter "K". | | **Voltage Rating** | 18,000V (18kV) | Indicated by the "187" prefix (18 x 10^3). | | **Dielectric Material** | X7R / N4700 / SL | Usually a Class II ceramic providing stability over temperature. | | **Mounting Type** | Through-hole | Typically a radial leaded "Doorknob" or "Disc" type. | --- ### 2. Part Number Breakdown Understanding the alphanumeric code helps in identifying the component's limits: * **187**: Represents the Voltage. In high-voltage coding, this often translates to **18,000V DC**. * **MDCL**: Likely a series designation referring to "Medium/High Voltage Dielectric Ceramic Leaded" or a specific manufacturer series for power applications. * **152**: The Capacitance code. The first two digits (15) are the significant figures, and the third (2) is the multiplier ($10^2$). $1500\text{ pF} = 1.5\text{ nF}$. * **K**: The Tolerance code ($K = \pm10\%$). * **H**: Often refers to the lead style or internal coating (High-reliability). * **G**: Often indicates RoHS compliance (Green/Lead-free). --- ### 3. Common Applications Due to its extremely high voltage rating (18kV), this part is not found in standard consumer electronics. It is used in: 1. **X-Ray Power Supplies**: Managing high-voltage pulses. 2. **Laser Equipment**: Energy storage and discharge circuits. 3. **High-Voltage Dividers**: Used in measuring equipment to scale down voltage safely. 4. **Electrostatic Precipitators**: Used in industrial air filtration. 5. **Smart Grid Equipment**: Protection and monitoring of high-tension lines. --- ### 4. Safety and Handling When working with parts like the **187MDCL152KHG**, please observe the following: * **Dielectric Absorption**: These capacitors can hold a residual charge even after power is disconnected. Always discharge them properly. * **Arcing**: Ensure proper spacing (creepage and clearance) on the PCB to prevent high-voltage arcing between leads.