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SJ4025RTP
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Product Detailed Parameters
- Description：HIGH TJ 400V 25A SCR TO220R
- Series：SJ
- Mfr：Littelfuse Inc.
- Package：Tube
- Voltage - Off State：600 V
- Voltage - Gate Trigger (Vgt) (Max)：1.5 V
- Current - Gate Trigger (Igt) (Max)：35 mA
- Current - Hold (Ih) (Max)：75 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：300A, 350A
- SCR Type：Standard Recovery
- Operating Temperature：-40°C ~ 150°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220AB
- Voltage - On State (Vtm) (Max)：1.6 V
- Current - On State (It (AV)) (Max)：16 A
- Current - On State (It (RMS)) (Max)：25 A
- Current - Off State (Max)：10 µA
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Overview
The SJ4025RTP is a Silicon-Controlled Rectifier (SCR) manufactured by Littelfuse, belonging to the SJxx20xx series. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (It RMS) of 25 A. The device operates within a temperature range of -40°C to +150°C and utilizes a TO-220-2 through-hole package. Key electrical parameters include a forward voltage of 1.6 V, a gate trigger voltage of 1.5 V, and a gate trigger current of 35 mA. The maximum holding current is 75 mA, with a non-repetitive peak on-state current capability of 300 A.
Feature Summary
- High-temperature operation capability up to 150°C for demanding environments
- Sensitive gate design allowing direct interfacing with control circuits
- Robust surge current handling for transient protection applications
Applications
- General purpose AC power control
- Solid-state relays
- Motor speed control circuits
Procurement Notes
Verify the specific suffix 'RTP' against the official Littelfuse datasheet to confirm packaging and tape-and-reel specifications. Ensure the ordering quantity aligns with manufacturer minimum order requirements. Confirm RoHS compliance status directly from the component documentation before finalizing procurement.
Selection Notes
Select this component when a 400 V blocking voltage and 25 A continuous current are required in a TO-220-2 package. The high junction temperature rating of 150°C distinguishes it from standard industrial SCRs. Verify that the 35 mA gate trigger current matches the driving circuit's output capabilities.
Part Context
This SCR belongs to the SJ series, which is designed for high-temperature performance compared to standard Littelfuse thyristors. The part integrates a glass-passivated junction for durability. It serves as a discrete solution for switching applications where modular SCR assemblies are unnecessary or cost-prohibitive.
Replacement Considerations
Direct pin-compatible replacements may include other 400 V, 25 A SCRs in TO-220 packages from Littelfuse, such as the S4025RTP, provided the higher temperature rating of the SJ series is not critical. Verify gate sensitivity and thermal characteristics before substitution.
