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S4040RTP
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Product Detailed Parameters
- Description：SCR 400V 40A TO220
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tube
- Voltage - Off State：400 V
- Voltage - Gate Trigger (Vgt) (Max)：1.5 V
- Current - Gate Trigger (Igt) (Max)：40 mA
- Current - Hold (Ih) (Max)：60 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：430A, 520A
- SCR Type：Standard Recovery
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220 Non-Isolated Tab
- Voltage - On State (Vtm) (Max)：1.8 V
- Current - On State (It (AV)) (Max)：25 A
- Current - On State (It (RMS)) (Max)：40 A
- Current - Off State (Max)：10 µA
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Overview
The Littelfuse S4040RTP is a Silicon Controlled Rectifier (SCR) from the Teccor Sxx40x series, designed for surface-mount applications in the SMTO-263-2 package. It features a rated repetitive off-state voltage of 400 V and an on-state RMS current of 40 A. The device has a maximum holding current of 60 mA, with gate trigger requirements of 1.5 V and 40 mA. Operating within a temperature range of -40°C to +125°C, it exhibits a forward voltage of 1.8 V and an off-state leakage current of 10 µA at VDRM.
Feature Summary
- Surface-mount construction in a compact SMTO-263-2 package for automated PCB assembly
- High thermal stability supporting operation up to +125°C junction temperature
- Low gate sensitivity requiring minimal control power for reliable triggering
Applications
- AC power switching circuits
- Solid-state relays
- Motor speed control systems
Procurement Notes
Verify the specific suffix 'RTP' against official Littelfuse documentation to confirm the reel packaging configuration. Ensure the selected component matches the required SMTO-263-2 footprint and pinout for the target design. Cross-reference datasheet revisions to confirm parameter consistency before finalizing procurement orders.
Selection Notes
Select this SCR when a 40 A RMS current rating and 400 V blocking voltage are required in a surface-mount form factor. Compare the 1.8 V forward voltage drop against alternative packages to evaluate conduction losses. Verify that the 40 mA gate trigger current aligns with the available drive circuit capabilities for the intended application.
Part Context
This component belongs to the Littelfuse Teccor Sxx40x family of thyristors. These devices are engineered for general-purpose power control applications requiring robust performance in compact designs. The S4040RTP variant specifically addresses the need for high-current handling in space-constrained surface-mount environments.
Replacement Considerations
Direct replacements include the S4040RQ3, which offers identical electrical ratings but utilizes a through-hole TO-220-3 package. Designers must account for mechanical mounting differences when substituting between surface-mount and leaded variants.
