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MCR218-6G
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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)：1.5 V
- Current - Gate Trigger (Igt) (Max)：25 mA
- Current - Hold (Ih) (Max)：30 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：100A @ 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)：-
- Current - On State (It (RMS)) (Max)：8:00 AM
- Current - Off State (Max)：10 µA
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Overview
The MCR218-6G is a standard recovery Silicon Controlled Rectifier (SCR) manufactured by Littelfuse Inc. It features an 8 A on-state RMS current rating and supports a maximum off-state voltage of 400 V. The device handles non-repetitive surge currents of 100 A at 60 Hz with a peak forward voltage drop of 1.8 V. Gate triggering requires a maximum voltage of 1.5 V and current of 25 mA, while off-state leakage remains below 10 µA. Operating temperatures range from -40°C to 125°C, with storage capabilities up to +150°C.
Feature Summary
- Designed for half-wave AC control applications including motor controls, heating systems, and power supplies
- Utilizes a TO-220AB through-hole package for robust mounting and thermal management
- Provides high surge current capability suitable for demanding industrial environments
Applications
- Half-wave AC motor controls
- Heating control circuits
- General purpose power supplies
Procurement Notes
Verify the specific suffix '6G' corresponds to the 400 V blocking voltage variant when sourcing replacements. Confirm the manufacturer is Littelfuse Inc. or authorized distributor to ensure component authenticity. Check datasheet revisions for any updates to maximum ratings or thermal characteristics before finalizing procurement specifications.
Selection Notes
Select this component for applications requiring moderate current handling in half-wave configurations. Ensure the circuit design accommodates the 1.5 V gate trigger threshold and 25 mA gate current requirements. Consider the TO-220AB package dimensions for PCB layout constraints and verify that the 100 A surge rating exceeds expected transient loads during startup or fault conditions.
Part Context
This SCR belongs to the MCR218 series, which includes variants with different voltage ratings such as the MCR218-2G and MCR218-4G. The series is characterized by low-power silicon gate technology optimized for reliable operation in various industrial control scenarios. The MCR218-6G specifically addresses lower voltage applications within this family lineup.
Replacement Considerations
The MCR218-006 is classified as obsolete; the MCR218-6G serves as its direct active substitute. Verify pinout compatibility and thermal resistance values when replacing legacy components to ensure seamless integration into existing designs without modification.
