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MCR8SDG
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Product Detailed Parameters
- Description：SCR 400V 8A TO220AB
- Series：-
- Mfr：Littelfuse Inc.
- Package：Box
- Voltage - Off State：400 V
- Voltage - Gate Trigger (Vgt) (Max)：1 V
- Current - Gate Trigger (Igt) (Max)：200 µA
- Current - Hold (Ih) (Max)：6 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：80A @ 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)：1.8 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 MCR8SDG is a sensitive gate silicon-controlled rectifier (SCR) manufactured by Littelfuse, designed for half-wave AC control applications. It features a TO-220AB package with glass-passivated junctions and lead-free construction. The device supports a peak repetitive off-state voltage of 400 V and an on-state RMS current of 8.0 A at 80°C case temperature. It offers high surge current capability of 80 A and includes specified minimum and maximum values for gate trigger current, gate trigger voltage, and holding current to facilitate design integration.
Feature Summary
- Sensitive gate architecture enables direct triggering by microcontrollers and logic circuits
- Glass passivated junctions provide reliability and uniformity
- Specified minimum and maximum gate trigger current, voltage, and holding current values simplify circuit design
Applications
- Half-wave AC motor controls
- Heating controls
- Power supplies requiring half-wave silicon gate-controlled devices
Procurement Notes
Verify the specific part number against official Littelfuse documentation to confirm electrical ratings and package style. Ensure that the procurement specifications align with the required blocking voltage and current parameters for the intended application environment.
Selection Notes
Select this component when a sensitive gate SCR is required for half-wave AC control applications. Consider the 400 V blocking voltage and 8.0 A RMS current rating relative to the load requirements. Verify compatibility with microcontroller or logic circuit drive signals due to the sensitive gate characteristics.
Part Context
The MCR8SDG belongs to the MCR8S series of sensitive gate silicon-controlled rectifiers from Littelfuse. This series includes variants with different voltage ratings, such as the MCR8SMG (600 V) and MCR8SNG (800 V), all sharing similar current ratings and package styles.
Replacement Considerations
Direct replacements within the same family include the MCR8SMG and MCR8SNG, which offer higher blocking voltages of 600 V and 800 V respectively while maintaining identical current ratings and package configurations.
FAQ
What is the critical rate of rise of off-state voltage (dv/dt) for the MCR8SDG?
The critical rate of rise of off-state voltage is specified as a minimum of 5.0 V/µs at a junction temperature of 110°C.
What are the typical values for gate trigger current and voltage?
At a junction temperature of 25°C, the typical gate trigger current is 25 µA and the typical gate trigger voltage is 0.65 V.
How does the MCR8SDG handle thermal stress?
The device has a thermal resistance from junction-to-case of 2.2 °C/W and operates within a junction temperature range of -40°C to 110°C.
