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SJ4020L1TP
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Product Detailed Parameters
- Description：HIGH TJ 400V 20A SCR TO220L
- 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 Full Pack, Isolated Tab
- Supplier Device Package：ITO-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 SJ4020L1TP is a Silicon Controlled Rectifier (SCR) belonging to the SJxx20xx series, designed for through-hole mounting in TO-220-2 packages. It features a rated repetitive off-state voltage (VDRM) of 400 V and an RMS on-state current (It RMS) of 20 A. The device exhibits a forward voltage drop (Vf) of 1.6 V, with gate trigger requirements of 1.5 V (Vgt) and 6 mA (Igt). Leakage current at VDRM is limited to 10 uA, while the maximum holding current (Ih) is 15 mA. Non-repetitive peak on-state current reaches 300 A. Operating temperatures range from -40 C to +150 C.
Feature Summary
- High thermal stability supporting operation up to +150 C
- Robust surge handling capability with 300 A non-repetitive current rating
- Low leakage current characteristics for reliable off-state performance
Applications
- Industrial power control systems
- AC motor speed regulation circuits
- Heater control applications
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number SJ4020L1TP with official Littelfuse documentation. Confirm package type matches TO-220-2 specifications. Ensure environmental compliance data aligns with project requirements. Validate electrical parameters against the specific datasheet version prior to integration into final designs.
Selection Notes
Select this SCR for applications requiring 400 V blocking capability and 20 A continuous current handling in a standard through-hole format. Consider the 1.6 V forward voltage drop for thermal management calculations. Verify that gate drive circuits can supply the specified 6 mA trigger current reliably across the full operating temperature range of -40 C to +150 C.
Part Context
This component is part of the Littelfuse SJxx20xx series of thyristors. The series provides discrete silicon controlled rectifiers optimized for general-purpose power switching. These devices are manufactured using advanced silicon planar technology to ensure consistent electrical characteristics and high reliability in demanding industrial environments.
Replacement Considerations
Consult Littelfuse official substitution guides for compatible alternatives. Verify pinout compatibility and thermal resistance values when considering cross-brand replacements. Ensure substitute parts meet or exceed the 400 V voltage rating and 20 A current capacity requirements.
