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S4012DTP
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Product Detailed Parameters
- Description：SCR 400V 12A TO252
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tube
- Voltage - Off State：400 V
- Voltage - Gate Trigger (Vgt) (Max)：1.5 V
- Current - Gate Trigger (Igt) (Max)：20 mA
- Current - Hold (Ih) (Max)：40 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：100A, 120A
- SCR Type：Standard Recovery
- Operating Temperature：-40°C ~ 125°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)：1.6 V
- Current - On State (It (AV)) (Max)：7.6 A
- Current - On State (It (RMS)) (Max)：12:00 AM
- Current - Off State (Max)：10 µA
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Overview
The Littelfuse S4012DTP is a Silicon Controlled Rectifier (SCR) from the Sxx12x series, designed for surface-mount applications in the TO-252-3 package. It features a rated repetitive off-state voltage of 400 V and an on-state RMS current of 12 A. The device has a maximum gate trigger current of 20 mA and a forward voltage of 1.6 V. Operating temperatures range from -40°C to +125°C, with a non-repetitive peak on-state current of 120 A.
Feature Summary
- Surface-mount construction in a TO-252-3 package for automated PCB assembly
- High thermal stability supporting operation up to 125°C junction temperature
- Sensitive gate triggering capability with low gate current requirements
Applications
- AC power control circuits
- Lighting dimmer applications
- Motor speed control systems
Procurement Notes
Verify the specific suffix DTP against official Littelfuse documentation to confirm it denotes the correct tape-and-reel packaging variant within the S4012 family. Ensure the ordering code matches the required surface-mount configuration and check for any recent product change notices affecting availability or specifications.
Selection Notes
Select this component when a 12 A RMS SCR is required in a compact surface-mount form factor. Compare the 400 V blocking voltage and 20 mA gate sensitivity against circuit requirements. Verify that the TO-252-3 thermal characteristics meet the system's heat dissipation needs compared to through-hole alternatives like the S4012R.
Part Context
This part belongs to the Littelfuse Sxx12x series of high-current SCRs. It shares electrical ratings with other variants in the line but differs in packaging. The S4012DTP specifically targets surface-mount designs, offering a footprint alternative to the through-hole S4012R while maintaining identical 12 A and 400 V performance metrics.
Replacement Considerations
The S4012DRP is a direct functional substitute within the same series, sharing identical electrical parameters. Both are surface-mount devices, though package dimensions should be verified for mechanical compatibility during replacement.
