The **CBF3JB33R0** is a specific model of a power resistor manufactured by **Stackpole Electronics**. This part belongs to the **CB Series**, which consists of ceramic housed resistors designed for high-power applications. --- ### 1. Technical Specifications The part number can be decoded to understand its core electronic characteristics: | Parameter | Value | Description | | :--- | :--- | :--- | | **Resistance** | 33 $\Omega$ | The electrical resistance value (33R0). | | **Power Rating** | 3 Watts | Maximum power the resistor can dissipate at 70°C. | | **Tolerance** | ±5% | The "J" in the part number indicates a 5% margin of error. | | **Temperature Coeff.** | ±300 ppm/°C | How much resistance changes with temperature. | | **Construction** | Wirewound | Resistance wire wrapped around a core (standard for CB series). | | **Housing** | Ceramic / Cement | Encased in a flameproof inorganic package. | --- ### 2. Physical Characteristics These resistors are often referred to as "Cement Resistors" due to their square, white ceramic rectangular bodies. * **Mounting Type:** Through-hole (Radial or Axial depending on the specific lead forming, but usually axial for basic CB series). * **Safety Features:** The ceramic housing provides excellent thermal conductivity and is inherently **flameproof**. * **Dimensions:** Typically around 22mm in length and 8mm in width/height (standard for 3W CB frames). --- ### 3. Common Applications Because of its 3W power rating and wirewound construction, the CBF3JB33R0 is used in circuits where heat dissipation and durability are required: * **Power Supplies:** Used as a bleeder resistor or for current limiting. * **Motor Controllers:** Handling small surges or acting as a snubbing component. * **Audio Equipment:** Used in crossover networks or power stage biasing. * **Industrial Equipment:** General-purpose power regulation where space is available for a bulky component. --- ### 4. Part Number Breakdown The naming convention follows this logic: | Code | Meaning | | :--- | :--- | | **CB** | Ceramic Body Series | | **F** | Flameproof / Standard lead type | | **3** | Power Rating (3 Watts) | | **J** | Tolerance (±5%) | | **B** | Bulk Packaging | | **33R0** | Resistance Value (33.0 Ohms) |