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MCR72-8G
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Product Detailed Parameters
- Description：SCR 600V 8A TO220AB
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tube
- Voltage - Off State：600 V
- Voltage - Gate Trigger (Vgt) (Max)：1.5 V
- Current - Gate Trigger (Igt) (Max)：200 µA
- Current - Hold (Ih) (Max)：6 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：100A @ 60Hz
- SCR Type：Sensitive Gate
- Operating Temperature：-40°C ~ 110°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220AB
- Voltage - On State (Vtm) (Max)：2 V
- Current - On State (It (AV)) (Max)：-
- Current - On State (It (RMS)) (Max)：8:00 AM
- Current - Off State (Max)：10 µA
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Overview
The Littelfuse MCR72-8G is an 8 Amp Silicon-Controlled Rectifier (SCR) housed in a TO-220AB package. It features a peak repetitive off-state voltage of 600V and supports an on-state RMS current of 8.0A at a case temperature of 83°C. The device offers a peak non-repetitive surge current of 100A and a maximum gate trigger current of 200µA, enabling direct interfacing with integrated circuits. Key electrical parameters include a holding current of 6.0mA maximum, a peak forward on-state voltage of 2.0V, and a critical rate-of-rise of off-state voltage of 10 V/µs.
Feature Summary
- Center gate geometry ensures uniform current density across the silicon junction.
- All diffused and glass-passivated junctions provide parameter stability and durability.
- Thermowatt construction delivers low thermal resistance for high heat dissipation.
Applications
- Temperature control systems
- Light dimming and speed control circuits
- Capacitive discharge ignition systems
Procurement Notes
Verify the specific part number suffix to confirm the package style and lead configuration. The datasheet lists both standard and tape-and-reel variants within the same family. Ensure the ordering code matches the required shipping format before finalizing procurement documentation.
Selection Notes
Select this component when a 600V blocking capability and 8A continuous current rating are required in a TO-220AB form factor. The low gate trigger current allows for direct drive from logic-level microprocessors without additional amplification stages.
Part Context
This device belongs to the MCR72 series of 8 Amp SCRs manufactured by Littelfuse. The series includes variants with different voltage ratings, specifically the MCR72-3 (100V) and MCR72-6 (400V), sharing identical current handling and physical dimensions.
Replacement Considerations
Compatible replacements include the MCR72-3G and MCR72-6G. These parts share the same package and current ratings but offer lower voltage blocking capabilities of 100V and 400V respectively.
FAQ
What is the maximum gate trigger current for the MCR72-8G?
The maximum gate trigger current is 200 µA under continuous DC conditions.
How is the pinout configured for the TO-220AB package?
Pin 1 is the Cathode, Pin 2 is the Anode, Pin 3 is the Gate, and Pin 4 is the Anode.
What is the thermal resistance from junction to case?
The thermal resistance from junction to case is 2.2 °C/W.
