The designation **"236-R"** is most commonly associated with **fixed precision resistors** or specific **thermal fuses/cutoffs**. Depending on the manufacturer, it typically refers to a component’s resistance value or a specific model number for circuit protection. Below is a detailed breakdown of the most common electronic parts carrying the 236-R label. --- ## 1. Precision Resistors (The "R" Suffix) In many electronic component numbering systems (like MIL-SPEC or manufacturer-specific codes), the **R** acts as a decimal point or indicates a low-resistance value. | Parameter | Description | | :--- | :--- | | **Value** | 236 Ohms ($\Omega$) or 2.36 Ohms (depending on code position). | | **Common Type** | Metal Film or Wirewound. | | **Tolerance** | Usually $\pm 1\%$ or $\pm 0.1\%$ for precision circuits. | | **Application** | Voltage dividers, signal conditioning, and current sensing. | ### Coding Convention Example In the 3-digit/4-digit SMD or axial code: * **236R**: 236 Ohms. * **23R6**: 23.6 Ohms. * **R236**: 0.236 Ohms. --- ## 2. Thermal Cutoffs (G4 Series / SEFUSE) A very common part number is the **G4A00236C** (often shortened to **236-R** in repair manuals). This is a thermal fuse used to prevent appliances from overheating. ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Function** | One-time thermal link (non-resettable). | | **Rated Temperature ($T_f$)** | **236°C** (The "236" denotes the cutoff temperature). | | **Voltage Rating** | 250V AC. | | **Current Rating** | 10A to 15A. | | **Housing** | Ceramic or metal cylinder with axial leads. | --- ## 3. Comparison of Common "236-R" Variants If you are looking at a physical board, use this table to identify the part: | Appearance | Component Type | Primary Purpose | | :--- | :--- | :--- | | Small cylinder with colored bands | **Resistor** | Limits current flow. | | Metal canister with two wire leads | **Thermal Fuse** | Safety cutoff at 236°C. | | Black rectangular block (SMD) | **Precision Resistor** | Surface mount circuit logic. | --- ### How to Test the Component If you are troubleshooting a circuit containing a 236-R part: 1. **For Resistors:** Use a Multimeter in **$\Omega$ (Ohms) mode**. It should read close to 236. If it reads "OL" (Open Loop), the resistor is blown. 2. **For Thermal Fuses:** Use **Continuity mode**. * **Beep:** The fuse is good. * **No Beep:** The fuse has tripped (blown) due to heat and must be replaced. ---