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S4008DTP
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Product Detailed Parameters
- Description：SCR 400V 8A 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)：15 mA
- Current - Hold (Ih) (Max)：30 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：83A, 100A
- 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)：5.1 A
- Current - On State (It (RMS)) (Max)：8:00 AM
- Current - Off State (Max)：10 µA
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Overview
The Littelfuse S4008DTP is a Silicon Controlled Rectifier (SCR) designed for surface-mount applications. It features an 8 A RMS on-state current and a 400 V repetitive peak off-state voltage rating. The device utilizes a sensitive gate architecture with a maximum gate trigger current of 500 uA and a gate trigger voltage of 800 mV. Packaged in a DPAK-2 (TO-252-2) form factor, it supports operation within a temperature range of -40°C to +110°C. Key electrical characteristics include a forward voltage of 1.6 V, a holding current of 8 mA, and a non-repetitive surge current capacity of 100 A.
Feature Summary
- Sensitive gate structure enabling reliable triggering with low gate drive power requirements
- Surface-mount DPAK-2 package optimized for automated PCB assembly processes
- High surge current capability suitable for handling transient load conditions
Applications
- AC power control circuits
- Lighting dimmer applications
- Motor speed control systems
Procurement Notes
Verify the exact suffix against official Littelfuse documentation to confirm pinout and thermal specifications. Confirm RoHS compliance status through the manufacturer's latest datasheet or environmental declaration. Ensure the ordering quantity aligns with the standard reel packaging requirements specified by the supplier.
Selection Notes
Select this component when a compact surface-mount SCR is required for moderate current switching. The 400 V rating suits low-voltage AC mains applications. Verify that the gate drive circuit can supply at least 500 uA to ensure consistent turn-on across the specified operating temperature range.
Part Context
This part belongs to the Littelfuse Sxx08xSx series of thyristors. The series provides various packages including through-hole and surface-mount options. The S4008DTP specifically addresses the need for space-constrained designs requiring robust SCR performance in a small outline package.
Replacement Considerations
Cross-reference with other SMD SCRs from Littelfuse such as the S4008DS3RP. Verify that substitute parts match the 8 A current rating, 400 V blocking voltage, and compatible TO-252-2 footprint.
