S2070WTP SCR 200V 70A TO-218X Equivalent & Substitute Parts

Part Overview

The S2070WTP is a Silicon Controlled Rectifier (SCR) rated for 200V off-state voltage and 70A RMS on-state current in a TO-218X through-hole package, manufactured by Littelfuse Inc. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The S2070WTP belongs to the standard recovery SCR category and is suitable for AC switching applications requiring moderate voltage ratings.

Substiute Parts

S2070WTP

Littelfuse Inc.In Stock: 831S2070WTP Datasheet

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S4070WTP

Littelfuse Inc.In Stock: 1359S4070WTP Datasheet

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S6070WTP

Littelfuse Inc.In Stock: 1320S6070WTP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S2070WTP are selected based on electrical and mechanical compatibility within the Littelfuse SCR product line. The substitution logic is based on the following criteria:

Preserved Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: TO-218X-3
• SCR Type: Standard Recovery
• Gate Trigger Voltage (Vgt) Max: 2V
• Gate Trigger Current (Igt) Max: 50mA
• On-State Voltage (Vtm) Max: 1.8V
• Hold Current (Ih) Max: 80mA
• Off-State Current Max: 20µA
• Non-Repetitive Surge Current: 800A / 950A
• Operating Temperature Range: -40°C to 125°C

Variable Parameter (Allows Substitution):

• Voltage - Off State: The substitute parts feature higher voltage ratings (400V and 600V) while maintaining all other electrical characteristics. Higher voltage-rated SCRs are electrically compatible in lower-voltage applications.

The S4070WTP (400V) and S6070WTP (600V) are direct substitutes that provide enhanced voltage margin for the same current-handling capacity and switching characteristics.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The S2070WTP is classified as obsolete, while both S4070WTP and S6070WTP are active products with current manufacturing support. For new designs and production continuity, selection of an active substitute is necessary.

Compliance and Certification: All three parts maintain ROHS3 compliance. The S4070WTP and S6070WTP include REACH Unaffected status, providing additional regulatory documentation for international applications.

Voltage Rating Selection:

• Use S4070WTP (400V) for applications requiring moderate voltage margin above the original 200V specification
• Use S6070WTP (600V) for applications requiring maximum voltage margin or where higher system voltages are anticipated

Both substitutes are electrically and mechanically compatible with the S2070WTP in all switching and thermal characteristics. Selection between the two substitutes depends solely on the required voltage rating for the target application.

Frequently Asked Questions (FAQ)

Q: Can S4070WTP or S6070WTP be used as direct replacements for S2070WTP? A: Yes. Both substitutes maintain identical on-state current (70A RMS), gate trigger characteristics, on-state voltage drop, hold current, and thermal operating range. The higher voltage ratings do not affect compatibility in 200V applications.

Q: What is the difference between S4070WTP and S6070WTP? A: The only difference is the off-state voltage rating: S4070WTP is rated for 400V while S6070WTP is rated for 600V. All other electrical and mechanical parameters are identical.

Q: Are there any package or mounting differences between these parts? A: No. All three parts use the TO-218X-3 package with through-hole mounting. Pin configuration and thermal characteristics are identical.

Q: Why would I choose a higher voltage-rated SCR if my application only requires 200V? A: Higher voltage ratings provide additional safety margin against voltage transients and overvoltage conditions. This is a common design practice for improved reliability and system robustness.

Q: Are the substitute parts available in the same packaging format? A: The S4070WTP and S6070WTP are supplied in tube packaging, while the original S2070WTP inventory information does not specify packaging format. Both substitutes are suitable for production environments.

Q: Do the substitutes have the same thermal characteristics? A: Yes. All three parts operate across the identical temperature range of -40°C to 125°C with the same on-state voltage drop (1.8V max) and current ratings.