S8025RTP Equivalent & Substitute Parts

Part Overview

The S8025RTP is a Silicon Controlled Rectifier (SCR) manufactured by Littelfuse Inc., rated for 800V off-state voltage with 25A RMS on-state current capability. This thyristor is designed for standard recovery applications in Through Hole TO-220 packaging and maintains Active product status with full ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range, enabling procurement flexibility and supply chain continuity.

Substiute Parts

S8025RTP

Littelfuse Inc.In Stock: 1142S8025RTP Datasheet

Current PartRFQ

S8025LTP

Littelfuse Inc.In Stock: 4741S8025LTP Datasheet

Parametric EquivalentRFQ

TYN840RG

STMicroelectronicsIn Stock: 1289TYN840RG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S8025RTP are classified based on strict electrical and mechanical parameter alignment:

Parametric Equivalent Classification: Parts maintaining identical or superior performance within the specified electrical envelope while preserving mechanical compatibility.

Key Parameters Determining Substitution:

• Off-state voltage rating: 800V minimum
• On-state RMS current rating: 25A minimum
• Gate trigger voltage and current: within specified maximums
• On-state forward voltage drop: within specified maximum
• Package type: TO-220-3 Through Hole configuration
• SCR recovery type: Standard Recovery
• Operating temperature range: -40°C to 125°C minimum
• Compliance status: ROHS3 Compliant

Parameter Comparison

Engineering Selection Recommendations

S8025LTP (Parametric Equivalent): This Littelfuse part maintains identical electrical specifications to the S8025RTP across all critical parameters including gate trigger voltage, on-state current rating, and forward voltage drop. The primary distinction is the supplier device package designation (TO-220AB-R versus TO-220 Non-Isolated Tab), which represents a packaging variant within the same TO-220-3 footprint. Both parts carry Active product status and ROHS3 compliance. Selection of S8025LTP is appropriate for direct substitution in applications where the S8025RTP is specified.

TYN840RG (MFR Recommended): This STMicroelectronics part exceeds the S8025RTP specification in on-state RMS current capacity (40A versus 25A) and non-repetitive surge current rating (460A/480A versus 300A/350A). Gate trigger voltage is lower (1.3V maximum versus 1.5V maximum), and off-state leakage current is reduced (5µA versus 20µA). The part maintains identical off-state voltage rating, on-state forward voltage drop, and operating temperature range. TYN840RG is suitable for applications requiring higher current handling capability while maintaining the 800V voltage class. Both parts are Active status with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can S8025LTP be used as a direct replacement for S8025RTP?

A: Yes. S8025LTP maintains identical electrical specifications across all critical parameters: 800V off-state voltage, 1.5V maximum gate trigger voltage, 35mA maximum gate trigger current, 1.6V maximum on-state voltage, and 25A RMS on-state current. The packaging variant (TO-220AB-R) is mechanically compatible within the TO-220-3 footprint. Both parts are Active status with ROHS3 compliance.

Q: When should TYN840RG be selected instead of S8025RTP?

A: TYN840RG is selected when the application requires higher on-state current capacity (40A RMS versus 25A RMS) or higher non-repetitive surge current handling (460A/480A versus 300A/350A). The lower gate trigger voltage (1.3V maximum) and reduced off-state leakage current (5µA) provide additional performance margin in certain circuit topologies. All three parts maintain the same 800V voltage rating and TO-220-3 package compatibility.

Q: Are there mechanical compatibility concerns between these parts?

A: All three parts use TO-220-3 Through Hole packaging with identical mounting type and footprint. The supplier device package designations (TO-220 Non-Isolated Tab, TO-220AB-R, and TO-220) represent internal tab isolation variants that do not affect PCB mounting or lead positioning. Direct mechanical substitution is supported.

Q: What compliance certifications apply to all substitute parts?

A: All three parts carry ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), REACH Unaffected status, and maintain Active product status. ECCN classification is EAR99 and HTSUS code is 8541.30.0080 for all parts.

Q: How do the electrical characteristics compare for thermal management?

A: On-state forward voltage drop (Vtm) is identical at 1.6V maximum across all three parts. TYN840RG provides higher current capacity (40A RMS) which may reduce power dissipation in high-current applications when operated at the same voltage drop. Current-hold specifications differ (50mA for S8025RTP and S8025LTP versus 75mA for TYN840RG), affecting gate circuit design requirements.