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MCR69-2G
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Product Detailed Parameters
- Description：SCR 50V 25A TO220AB
- Series：-
- Mfr：Littelfuse Inc.
- Package：Box
- Voltage - Off State：50 V
- Voltage - Gate Trigger (Vgt) (Max)：1.5 V
- Current - Gate Trigger (Igt) (Max)：30 mA
- Current - Hold (Ih) (Max)：50 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：300A @ 60Hz
- SCR Type：Standard Recovery
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220AB
- Voltage - On State (Vtm) (Max)：1.8 V
- Current - On State (It (AV)) (Max)：16 A
- Current - On State (It (RMS)) (Max)：25 A
- Current - Off State (Max)：10 µA
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Overview
The Littelfuse MCR69-2G is a lead-free Silicon Controlled Rectifier (SCR) housed in a TO-220AB thermowatt package. It features glass-passivated junctions and center-gate geometry for uniform current spreading. The device supports a peak repetitive off-state voltage of 50V, with an on-state RMS current of 25A at TC=85°C and an average on-state current of 16A at TC=80°C. It handles a peak discharge current of 750A and a non-repetitive surge current of 300A. Operating junction temperature ranges from -40°C to +125°C.
Feature Summary
- Designed for overvoltage protection in crowbar circuits
- Center-gate geometry enables high discharge current capability
- Glass-passivated junctions ensure parameter stability and reliability
Applications
- Crowbar circuit overvoltage protection
- High capacitor discharge applications
- Industrial power control systems
Procurement Notes
Verify the specific suffix 'G' indicates a lead-free package configuration as documented in the ordering information section. Confirm that the TO-220AB physical dimensions match the required mounting constraints. Ensure the gate trigger characteristics align with the driving circuit requirements before finalizing procurement orders.
Selection Notes
Select this component when a low-voltage SCR with high surge current handling is required. The 50V rating limits its use to low-voltage DC or rectified AC applications. Consider the thermal resistance values for heat sink design. Verify that the gate trigger current specifications are compatible with the available control logic signals.
Part Context
This part belongs to the MCR69 series of silicon-controlled rectifiers manufactured by Littelfuse. The series includes variants with different blocking voltage ratings, such as the MCR69-3. These devices share common packaging and structural features but differ in their maximum voltage capabilities.
Replacement Considerations
Check for other MCR69 series parts like MCR69-3 if higher voltage blocking is needed. Verify pinout compatibility for direct replacement in existing TO-220AB footprints. Ensure thermal management solutions remain adequate for the new component's dissipation requirements.
FAQ
What is the peak discharge current capability of the MCR69-2G?
The MCR69-2G has a peak discharge current capability of 750 Amps.
Does the 'G' suffix indicate a specific material composition?
Yes, the 'G' suffix denotes a lead-free package configuration.
What is the holding current specification for this device?
The holding current is specified as a maximum of 50 mA under standard test conditions.
