The **GS1B-R** is a Surface Mount (SMD) General Purpose Rectifier diode. It is commonly used for power rectification, reverse polarity protection, and voltage clamping in various electronic circuits. Below is a detailed breakdown of its specifications and characteristics. --- ### 1. Key Technical Specifications The GS1B-R belongs to the "GS1" series. The suffix "B" typically denotes its voltage rating, and "R" often refers to the packaging type (Tape & Reel). | Parameter | Specification | | :--- | :--- | | **Diode Type** | Standard Recovery Rectifier | | **Repetitive Peak Reverse Voltage ($V_{RRM}$)** | 100V | | **Maximum RMS Voltage** | 70V | | **Average Forward Current ($I_{F(AV)}$)** | 1.0 Ampere | | **Peak Forward Surge Current ($I_{FSM}$)** | 30 Amperes (8.3ms sine wave) | | **Maximum Forward Voltage ($V_F$)** | 1.1V @ 1.0A | | **Reverse Recovery Time ($t_{rr}$)** | Typically 1.5µs to 2.5µs (Standard) | | **Operating Temperature Range** | -55°C to +150°C | --- ### 2. Physical Construction and Package The GS1B-R is designed for automated assembly on Printed Circuit Boards (PCBs). * **Package Type:** SMA (DO-214AC). * **Case Material:** Molded plastic (UL Flammability Classification 94V-0). * **Terminals:** Solderable leads (Matte Tin plated). * **Polarity:** A color band denotes the **Cathode** end. --- ### 3. Functional Applications Because it is a "standard recovery" diode, it is best suited for low-frequency applications rather than high-speed switching power supplies (where Schottky or Ultra-Fast diodes would be used). * **AC-to-DC Rectification:** Used in bridge rectifiers for small power adapters. * **Reverse Polarity Protection:** Prevents damage to a circuit if the battery or power supply is connected backwards. * **Inductive Load Kickback Protection:** Acting as a "freewheeling diode" across relays or motors. * **General Voltage Clamping:** Shunting excess voltage to ground. --- ### 4. Code Comparison The GS1 series varies primarily by its voltage handling capability: | Part Number | Peak Reverse Voltage ($V_{RRM}$) | | :--- | :--- | | GS1A | 50V | | **GS1B** | **100V** | | GS1D | 200V | | GS1G | 400V | | GS1J | 600V | | GS1K | 800V | | GS1M | 1000V | ---