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MCR703AT4G
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Product Detailed Parameters
- Description：SCR 100V 4A DPAK
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Off State：100 V
- Voltage - Gate Trigger (Vgt) (Max)：800 mV
- Current - Gate Trigger (Igt) (Max)：75 µA
- Current - Hold (Ih) (Max)：5 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：25A @ 60Hz
- SCR Type：Sensitive Gate
- Operating Temperature：-40°C ~ 110°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：TO-252 (DPAK)
- Voltage - On State (Vtm) (Max)：2.2 V
- Current - On State (It (AV)) (Max)：2.6 A
- Current - On State (It (RMS)) (Max)：4:00 AM
- Current - Off State (Max)：10 µA
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Overview
The MCR703AT4G is a silicon-controlled rectifier (SCR) manufactured by Littelfuse, designed for surface-mount applications in the DPAK-2 (TO-252-2) package. It features a rated repetitive off-state voltage of 100 V and an RMS on-state current capability of 4 A. The device exhibits a maximum holding current of 5 mA and a gate trigger voltage of 800 mV with a gate trigger current of 75 uA. Forward voltage drop is specified at 2.2 V, while leakage current remains at 10 uA under rated conditions. Operating temperatures range from -40 C to +110 C, ensuring reliability across diverse industrial environments.
Feature Summary
- Surface-mount construction in a compact DPAK-2 package for automated PCB assembly
- High thermal stability supporting operation up to +110 C junction temperature
- Low gate sensitivity enabling efficient triggering with minimal control power
Applications
- AC motor speed control circuits
- Solid-state relay output stages
- Lighting dimmer implementations
Procurement Notes
Verify component authenticity through official Littelfuse channels or authorized distributors. Confirm RoHS compliance status via current datasheets. Ensure storage conditions prevent moisture absorption prior to reflow soldering. Validate package markings against manufacturer specifications to avoid counterfeit risks during procurement.
Selection Notes
Select this SCR when 100 V blocking capability and 4 A continuous current are required in a surface-mount form factor. Consider the low gate trigger current for sensitive control interfaces. Evaluate thermal management requirements given the TO-252-2 package constraints. Compare against through-hole alternatives if higher current density or different mounting styles are necessary.
Part Context
This component belongs to the MCR703A series of thyristors within Littelfuse's portfolio. It serves as a robust switching element for power control applications requiring reliable latching behavior. The series is engineered for industrial and consumer electronics where space efficiency and electrical performance are critical design parameters.
Replacement Considerations
Consult Littelfuse documentation for direct pin-compatible substitutes within the MCR703A family. Verify electrical ratings match original design requirements before substitution. Cross-reference package dimensions to ensure mechanical fit on existing PCB layouts.
