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Product Detailed Parameters
- Description：SCR 800V 12.5A TO220AB
- Series：-
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Tube
- Voltage - Off State：800 V
- Voltage - Gate Trigger (Vgt) (Max)：1 V
- Current - Gate Trigger (Igt) (Max)：15 mA
- Current - Hold (Ih) (Max)：30 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：140A @ 50Hz
- SCR Type：Standard Recovery
- Operating Temperature：-40°C ~ 125°C
- Grade：-
- Qualification：-
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220-3
- Voltage - On State (Vtm) (Max)：1.2 V
- Current - On State (It (AV)) (Max)：8:00 AM
- Current - On State (It (RMS)) (Max)：12.5 A
- Current - Off State (Max)：50 µA
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Overview
The Vishay 12TTS08 is a phase control silicon controlled rectifier (SCR) in the High Voltage Series, designed for medium power switching. It features an 800 V repetitive peak off-state voltage and an average on-state current of 8 A at 108 °C case temperature. The device utilizes glass passivation technology for reliable operation up to a junction temperature of 125 °C. Packaged in TO-220AB, it offers a maximum non-repetitive surge current of 140 A and a typical holding current of 30 mA.
Feature Summary
- Glass passivation technology ensures reliable operation at elevated junction temperatures up to 125 °C.
- Designed specifically for medium power switching and phase control applications.
- Compatible with Vishay HPP input diodes, switches, and output rectifiers sharing identical package outlines.
Applications
- Input rectification circuits
- Crowbar protection circuits
- Soft start configurations
Procurement Notes
Verify the specific ordering suffix when purchasing. The standard production version lacks lead-free designation, while the PbF variant indicates lead-free construction. Confirm that the required voltage rating matches the 800 V specification and ensure the TO-220 package aligns with the thermal management design. Cross-reference the datasheet revision date to confirm technical parameters.
Selection Notes
Select this component for single-phase or three-phase bridge applications requiring robust phase control. Ensure the thermal design accommodates the maximum junction-to-case thermal resistance of 1.5 °C/W. Verify that gate triggering requirements fall within the specified DC gate current limits across the operating temperature range from -65 °C to 125 °C.
Part Context
This SCR belongs to the 12TTS08 High Voltage Series by Vishay High Power Products. The series is engineered for industrial-level performance. An SMD-220 package variant exists under the 12TTS..S designation. The product is distinct from automotive-grade components and is intended for general industrial power electronics.
Replacement Considerations
No public confirmed substitute part numbers are documented in the provided source material.
FAQ
What is the maximum non-repetitive surge current capability?
The device supports a maximum non-repetitive surge current of 140 A for a 10 ms sine pulse with no voltage reapplied at a junction temperature of 125 °C.
How does the package relate to other Vishay products?
The TO-220AB package is identical to Vishay HPP input diodes, switches, and output rectifiers, facilitating integrated thermal management designs.
What is the maximum rate of rise of off-state voltage?
The maximum dV/dt rating is 150 V/µs at a junction temperature of 25 °C.
