## Technical Overview: VS-ST1230C..K Series The **VS-ST1230C..K** series consists of Phase Control Thyristors (SCRs) in a "Hockey Puk" (press pack) configuration. These are high-power semiconductors designed for industrial applications requiring high current and voltage regulation. --- ### 1. Key Technical Specifications Below are the typical parameters for this series (values may vary slightly based on the specific voltage suffix): | Parameter | Symbol | Typical Value | | :--- | :--- | :--- | | **Average On-State Current** | $I_{T(AV)}$ | 1230 A (at $T_c = 55^\circ C$) | | **RMS On-State Current** | $I_{T(RMS)}$ | 2310 A | | **Voltage Range ($V_{DRM}/V_{RRM}$)** | $V_{RRM}$ | 800 V to 1600 V | | **Peak Surge Current (50Hz)** | $I_{TSM}$ | 24,200 A | | **Gate Trigger Current** | $I_{GT}$ | 200 mA (Max) | | **Case Style** | - | B-PUK (TO-200AC) | --- ### 2. Physical Construction & Features * **Package Type:** Known as a **Press Pack** or **Hockey Puk**. It lacks a traditional threaded stud and requires an external clamping force for electrical and thermal contact. * **Full Diffusion:** The silicon wafer is fully diffused, ensuring robust performance under high thermal stress. * **Double-Sided Cooling:** Because of the flat ceramic design, heat can be dissipated from both the top and bottom surfaces, significantly increasing the current handling capability. * **Gate Connection:** Features a specialized central gate design for uniform current distribution during turn-on. --- ### 3. Application Use Cases These components are integral to high-power industrial electronics, including: 1. **Large Motor Drives:** Soft starters and variable speed control for industrial motors. 2. **AC/DC Rectifiers:** Used in high-power battery charging and electrolysis. 3. **Induction Heating:** Power supplies for melting and forging metals. 4. **Static VAR Compensators (SVC):** Used in power grids for reactive power compensation. --- ### 4. Part Number Breakdown The suffix indicates the repetitive peak reverse voltage ($V_{RRM}$): * **VS-ST1230C08K:** 800 V * **VS-ST1230C12K:** 1200 V * **VS-ST1230C16K:** 1600 V --- ### 5. Installation Note (Important) Since these are **Press Pack** devices, the mounting force is critical. * **Recommended Clamping Force:** Typically ~22.2 kN (approx. 2250 kgf). * **Thermal Compound:** A thin layer of conductive silicone grease must be applied to the polished surfaces to ensure minimal thermal resistance.