S4X8TS2RP Equivalent & Substitute Parts

Part Overview

The S4X8TS2RP is a Sensitive Gate SCR (Silicon Controlled Rectifier) rated for 400V off-state voltage with 800mA RMS current capability in a surface mount SOT-223 package. Manufactured by Littelfuse Inc., this component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter ranges for this thyristor category.

Substiute Parts

S4X8TS2RP

Littelfuse Inc.In Stock: 15506S4X8TS2RP Datasheet

Current PartRFQ

P0102DN 5AA4

STMicroelectronicsIn Stock: 5858P0102DN 5AA4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of thyristor components is determined by equivalence in the following critical parameters: off-state voltage rating, gate trigger voltage and current thresholds, on-state voltage drop, RMS current capacity, holding current, operating temperature range, and physical package compatibility. The P0102DN 5AA4 from STMicroelectronics qualifies as a substitute based on matching or exceeding these specifications within acceptable engineering tolerances for the SOT-223 surface mount package category.

Substitution criteria applied:

• Off-state voltage: 400V (matched)
• Gate trigger voltage: 800mV maximum (matched)
• On-state RMS current: 800mA (matched)
• Holding current: 5mA maximum (matched)
• Operating temperature: -40°C to 125°C (matched)
• Package: SOT-223 surface mount (matched)
• Compliance: ROHS3 compliant (matched)

Parameter Comparison

Engineering Selection Recommendations

Both the S4X8TS2RP and P0102DN 5AA4 maintain Active product status and full ROHS3 compliance with REACH unaffected classification. Selection between these components is based on application-specific requirements within the specified parameter ranges. The P0102DN 5AA4 exhibits higher gate trigger current (200µA vs. 50µA) and slightly elevated on-state voltage drop (1.95V vs. 1.7V), which may impact gate drive circuit design and power dissipation calculations. Both components are qualified for the full -40°C to 125°C operating temperature range and support identical SOT-223 surface mount packaging for PCB integration.

Frequently Asked Questions (FAQ)

Q: Can P0102DN 5AA4 directly replace S4X8TS2RP in existing designs? A: Direct replacement is possible when circuit design accommodates the parameter differences. The higher gate trigger current requirement (200µA vs. 50µA) and increased on-state voltage drop (1.95V vs. 1.7V) must be evaluated against gate drive capability and thermal management in the application.

Q: Are the packages physically identical? A: Both components use the SOT-223 surface mount package with TO-261-4 and TO-261AA case designations, ensuring mechanical compatibility for PCB assembly without layout modifications.

Q: What compliance certifications apply to both parts? A: Both S4X8TS2RP and P0102DN 5AA4 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component distribution and use.

Q: How do the current ratings compare? A: Both components are rated for 800mA RMS on-state current and 5mA maximum holding current, providing equivalent current handling capacity for the application circuit.

Q: What is the temperature operating range for both parts? A: Both the S4X8TS2RP and P0102DN 5AA4 operate across the -40°C to 125°C temperature range, supporting equivalent thermal performance specifications.