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SJ4020R1TP
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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)：6 mA
- Current - Hold (Ih) (Max)：15 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：225A, 300A
- 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)：12.8 A
- Current - On State (It (RMS)) (Max)：20 A
- Current - Off State (Max)：10 µA
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Overview
The Littelfuse SJ4020R1TP is a Silicon Controlled Rectifier (SCR) belonging to the SJxx20xx series, designed for high-power switching applications. It features a TO-220-2 through-hole package with an isolated mounting tab. The device supports a rated repetitive off-state voltage (VDRM) of 400 V and handles an on-state RMS current (It RMS) of 20 A. Key electrical parameters include a forward voltage drop (Vf) of 1.6 V, a gate trigger voltage (Vgt) of 1.5 V, and a gate trigger current (Igt) of 6 mA. The component operates within a temperature range of -40°C to +150°C, with a maximum holding current of 15 mA and a non-repetitive peak on-state current capability of 300 A.
Feature Summary
- Electrically isolated TO-220-2 package eliminates the need for external insulators
- Glass-passivated junctions ensure long-term parameter stability and reliability
- High thermal performance suitable for demanding power control environments
Applications
- AC power control circuits
- Industrial motor speed controls
- Lighting dimming systems
Procurement Notes
Verify the specific suffix 'R1' against official Littelfuse documentation to confirm tape-and-reel packaging or specific binning requirements. Confirm RoHS compliance status and REACH SVHC details via the manufacturer datasheet before finalizing procurement specifications.
Selection Notes
Select this component when a 400 V blocking voltage and 20 A continuous current rating are required in a standard TO-220 form factor. Ensure the application circuit provides sufficient gate drive current exceeding 6 mA to guarantee reliable triggering under all operating conditions.
Part Context
This part belongs to the SJxx20xx family of SCRs from Littelfuse. These devices are engineered for robust performance in industrial and commercial power electronics, offering a balance of high current handling and compact through-hole packaging for efficient PCB integration.
Replacement Considerations
Consult Littelfuse official substitution guides for compatible alternatives. Verify that any replacement SCR matches the 400 V VDRM, 20 A It RMS, and TO-220-2 package dimensions to ensure mechanical and electrical compatibility.
