SJ4012L1TP Equivalent & Substitute Parts

Part Overview

The SJ4012L1TP is an active SCR (Silicon Controlled Rectifier) thyristor manufactured by Littelfuse Inc., rated for 600V off-state voltage and 12A RMS on-state current in a TO-220-3 through-hole package with isolated tab configuration. The product is in active status with ROHS3 compliance and unlimited moisture sensitivity level. Finding equivalent and substitute parts is necessary when the primary part is unavailable, when higher current ratings are required, or when supply chain optimization is needed while maintaining electrical and mechanical compatibility.

Substiute Parts

SJ4012L1TP

Littelfuse Inc.In Stock: 745SJ4012L1TP Datasheet

Current PartRFQ

SJ6016L1TP

Littelfuse Inc.In Stock: 1421SJ6016L1TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The SJ6016L1TP qualifies as a parametric equivalent and substitute for the SJ4012L1TP based on the following electrical and mechanical parameters:

Common Parameters (Identical):

• Voltage - Off State: 600 V
• Voltage - Gate Trigger (Vgt) (Max): 1.5 V
• Current - Gate Trigger (Igt) (Max): 6 mA
• Voltage - On State (Vtm) (Max): 1.6 V
• Current - Hold (Ih) (Max): 15 mA
• Current - Off State (Max): 10 µA
• SCR Type: Standard Recovery
• Operating Temperature: -40°C ~ 150°C (TJ)
• Package / Case: TO-220-3 Full Pack, Isolated Tab
• Mounting Type: Through Hole
• Supplier Device Package: ITO-220AB

Parameter Difference (Upgrade Path):

• Current - On State (It (RMS)) (Max): 16 A (SJ6016L1TP) versus 12 A (SJ4012L1TP)
• Current - On State (It (AV)) (Max): 10 A (SJ6016L1TP) versus 7.6 A (SJ4012L1TP)
• Current - Non Rep. Surge 50, 60Hz (Itsm): 188A/225A (SJ6016L1TP) versus 100A/120A (SJ4012L1TP)

The SJ6016L1TP maintains full electrical and mechanical compatibility while providing enhanced current handling capability, making it a direct substitute for applications requiring equal or greater current capacity within the same voltage and package specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the SJ4012L1TP and SJ6016L1TP are active products from Littelfuse Inc. with ROHS3 compliance and REACH unaffected status. Both devices meet the same environmental and regulatory requirements (MSL 1, ECCN EAR99, HTSUS 8541.30.0080).

The SJ6016L1TP serves as an upgrade substitute when the application requires current capacity exceeding 12A RMS. The identical gate trigger characteristics, on-state voltage, and operating temperature range ensure functional compatibility in control circuits. The enhanced current ratings (16A RMS and 10A average) and non-repetitive surge current capability (188A/225A at 50/60Hz) make the SJ6016L1TP suitable for higher-power applications within the same form factor and board layout.

The SJ4012L1TP remains the correct selection for applications with maximum current requirements of 12A RMS or less, providing cost optimization for designs that do not require the higher current rating of the SJ6016L1TP.

Frequently Asked Questions (FAQ)

Q: Can the SJ6016L1TP directly replace the SJ4012L1TP in an existing design?

A: Yes. The SJ6016L1TP provides identical control characteristics (gate trigger voltage and current) and the same package configuration (TO-220-3 with isolated tab). No circuit modification is required. The higher current rating does not impact gate drive requirements or thermal management if the application operates at or below the original 12A RMS specification.

Q: What is the main electrical difference between these parts?

A: The SJ6016L1TP has higher current handling capacity: 16A RMS (versus 12A RMS) and 10A average current (versus 7.6A average). Non-repetitive surge current is also increased from 100A/120A to 188A/225A at 50/60Hz. All gate trigger and on-state voltage characteristics remain identical.

Q: Are both parts interchangeable in TO-220 PCB layouts?

A: Yes. Both devices use the TO-220-3 Full Pack with isolated tab configuration and the same through-hole mounting type. No PCB design changes are needed for substitution.

Q: What compliance and regulatory status do these parts share?

A: Both are ROHS3 compliant, REACH unaffected, and carry the same ECCN (EAR99) and HTSUS (8541.30.0080) classifications. Both have MSL 1 (Unlimited) moisture sensitivity level.

Q: When should I select the SJ4012L1TP over the SJ6016L1TP?

A: Select the SJ4012L1TP when your application is current-limited to 12A RMS or less and cost optimization is a design priority. The SJ6016L1TP is preferred for applications requiring higher current capacity or offering thermal headroom for reliability.