The term **235** in electronics most commonly refers to the **BT136-600E (or similar) Triac** series or specific high-power **Power Modules**. However, in the context of general electronic components, "235" usually appears in three specific categories: surface-mount resistors, TRIACs, and power modules. --- ## 1. The 235 Resistor Code In the standard 3-digit SMD (Surface Mount Device) marking system, the number **235** represents a specific resistance value. ### Value Calculation | Digit | Meaning | Value | | :--- | :--- | :--- | | **First Digit** | Significant Figure | 2 | | **Second Digit** | Significant Figure | 3 | | **Third Digit** | Multiplier ($10^x$) | $10^5$ (100,000) | | **Result** | Total Ohms | **2,300,000 $\Omega$ (2.3 M$\Omega$)** | --- ## 2. BT136-600E (Marked "235") In power electronics, the number **235** is often a date code or a partial batch code found on the **BT136 series TRIAC**. These are used for controlling AC power. ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Type** | TRIAC (Bidirectional Triode Thyristor) | | **Max Voltage ($V_{DRM}$)** | 600V | | **Max Current ($I_{T(RMS)}$)** | 4A | | **Package** | TO-220 | | **Common Use** | Light dimmers, motor speed controllers | --- ## 3. The 235 Series Power Modules There are high-current bridge rectifiers and thyristor modules (like the **SKKT 235**) used in industrial machinery. These are significantly larger than hobbyist components. ### SKKT 235 Key Features * **Dual Thyristor Module:** Contains two thyristors connected in series. * **High Current:** Rated for approximately **235 Amperes**. * **Heat Dissipation:** Requires a large heatsink due to high thermal output. * **Applications:** DC motor drives, soft starters, and high-power rectifiers. --- ## Summary of Usage Depending on the physical size of the part you are looking at: 1. **Tiny Black Chip (SMD):** It is a **2.3 Megohm resistor**. 2. **Transistor-like (3 pins):** It is likely a **BT136 TRIAC** (look for the full part number). 3. **Large Heavy Block:** It is an **Industrial Power Module** (e.g., Semikron SKKT).