S2035JTP Equivalent & Substitute Parts

Part Overview

The S2035JTP is a Silicon Controlled Rectifier (SCR) rated for 200V off-state voltage with 35A RMS current capacity, manufactured by Littelfuse Inc. in a TO-218X isolated through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The S2035JTP maintains standard recovery characteristics suitable for general-purpose thyristor applications requiring 200V voltage isolation.

Substiute Parts

S2035JTP

Littelfuse Inc.In Stock: 1029S2035JTP Datasheet

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S4035JTP

Littelfuse Inc.In Stock: 873S4035JTP Datasheet

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S6035JTP

Littelfuse Inc.In Stock: 1409S6035JTP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S2035JTP are qualified based on the following criteria:

Electrical Compatibility Parameters:

• Gate trigger voltage (Vgt) and current (Igt) specifications must match or be lower
• On-state voltage (Vtm) and hold current (Ih) must remain within equivalent ranges
• Operating temperature range must encompass or exceed the original specification
• SCR type classification must be Standard Recovery

Mechanical Compatibility Parameters:

• Package type must be TO-218X-3 Isolated Tab (through-hole mounting)
• Mounting configuration must be identical

Regulatory Compliance:

• RoHS3 compliance required
• Moisture Sensitivity Level (MSL) must be 1 or equivalent

The S4035JTP and S6035JTP are qualified substitutes because they maintain identical gate control parameters, on-state characteristics, hold current, operating temperature range, package configuration, and regulatory compliance. The primary difference is elevated off-state voltage rating, which provides enhanced voltage isolation capability while maintaining full backward compatibility with the original circuit design.

Parameter Comparison

Engineering Selection Recommendations

S4035JTP Selection Criteria: The S4035JTP is an active product with 400V off-state voltage rating. This substitute is appropriate for applications where the circuit operates at or below 200V and requires enhanced voltage margin. The identical gate control parameters and on-state characteristics ensure direct functional compatibility. Active product status provides long-term supply availability and manufacturing support.

S6035JTP Selection Criteria: The S6035JTP is an active product with 600V off-state voltage rating. This substitute provides maximum voltage isolation capability while maintaining all electrical and mechanical compatibility with the original S2035JTP. Active product status and higher inventory levels support production continuity. Selection is appropriate for applications requiring the highest voltage margin within the Littelfuse standard recovery SCR family.

Compliance Considerations: Both substitute parts maintain ROHS3 compliance and MSL Level 1 (unlimited moisture sensitivity), matching the original part's regulatory status. REACH unaffected status on substitute parts confirms compliance with European chemical regulations.

Frequently Asked Questions (FAQ)

Q: Can S4035JTP or S6035JTP be used as direct replacements for S2035JTP in existing designs?

A: Yes. Both substitute parts maintain identical gate trigger voltage, gate trigger current, on-state voltage, hold current, and operating temperature specifications. The TO-218X-3 isolated tab package is mechanically identical, enabling direct PCB mounting without modification. The elevated off-state voltage rating provides additional voltage isolation margin without affecting circuit operation.

Q: What is the primary difference between the three parts?

A: The off-state voltage rating is the only electrical difference. S2035JTP is rated 200V, S4035JTP is rated 400V, and S6035JTP is rated 600V. All other electrical parameters and the package configuration are identical.

Q: Why should I select a higher voltage-rated substitute if my application only requires 200V?

A: Higher voltage-rated SCRs provide additional safety margin against voltage transients and overvoltage conditions. Since gate control and on-state characteristics are identical, the higher voltage rating introduces no performance penalty while improving circuit robustness. Additionally, S4035JTP and S6035JTP are active products with established supply chains, whereas S2035JTP is obsolete.

Q: Are there any thermal or current handling differences between these parts?

A: No. All three parts are rated for 35A RMS on-state current and maintain identical thermal operating range (-40°C to 125°C). Current handling capacity and thermal characteristics are equivalent across all three part numbers.

Q: What is the packaging difference between the main part and substitutes?

A: There is no packaging difference. All three parts use the TO-218X-3 isolated tab through-hole package. Tube packaging is available for the substitute parts, which is standard for active products.

Q: Are there any circuit design considerations when switching from S2035JTP to S4035JTP or S6035JTP?

A: No circuit design changes are required. The identical gate trigger specifications, on-state voltage, and hold current ensure that existing gate drive circuits and control logic function without modification. The parts are electrically interchangeable at the circuit level.