Based on the part number **PW173KB1503F01**, this component belongs to the **PW series** of high-reliability, high-voltage thick film resistors, typically manufactured by companies like **Ohmite** or **TT Electronics (IRC)**. Below is a detailed breakdown of the electronic specifications and characteristics for this specific part. --- ### 1. Part Number Breakdown The alphanumeric string follows a standard industrial coding scheme for precision resistors: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | `PW` | High Power / Wirewound or Thick Film Series | | **Size/Power** | `173` | Physical size code (often correlates to 2W - 3W power rating) | | **Temp. Coeff.** | `K` | Temperature Coefficient of Resistance (TCR) | | **Resistance Value**| `1503` | **150** followed by **3** zeros = 150,000 $\Omega$ (**150 kΩ**) | | **Tolerance** | `F` | **±1%** Precision | | **Packaging** | `01` | Specific packaging or lead configuration (usually bulk) | --- ### 2. Technical Specifications While exact datasheet parameters can vary slightly by manufacturer, the **PW series** generally conforms to the following electrical profile: #### Electrical Characteristics * **Resistance:** 150 kΩ * **Tolerance:** ±1% (Precision grade) * **Power Rating:** Typically rated between **2 Watts to 5 Watts** (depending on ambient temperature and mounting). * **Voltage Rating:** High voltage capability, often rated for **500V to 1500V** surges depending on the specific package insulation. * **TCR (Temperature Coefficient):** Typically ±100 ppm/°C or better, ensuring stability over temperature fluctuations. #### Physical Attributes * **Construction:** Ceramic core with a resistive element (Thick Film or Wirewound). * **Coating:** Flameproof silicone or epoxy coating for environmental protection. * **Leads:** Tinned copper leads, suitable for through-hole soldering on PCBs. --- ### 3. Common Applications Due to its high resistance (150k) and precision (1%), this part is commonly used in: * **Voltage Dividers:** In power supplies to sense high voltage levels. * **Bleeder Resistors:** To safely discharge capacitors in high-voltage circuits after power-off. * **Current Limiting:** In industrial control circuits. * **Medical Equipment:** Where reliability and high-voltage stability are critical. --- ### 4. Comparison with Standard Resistors | Feature | Standard Resistor (CR Series) | PW173KB1503F01 | | :--- | :--- | :--- | | **Power Handling** | Low (0.125W - 0.25W) | High (2W+) | | **Voltage Limit** | ~200V | High Voltage (Up to 1kV+) | | **Stability** | Moderate | High (Precision Thick Film) | | **Size** | Small (0603/0805) | Large (Through-hole Axial) |