S8055NTP Equivalent & Substitute Parts

Part Overview

The S8055NTP is an 800V, 55A standard recovery SCR manufactured by Littelfuse Inc. in a surface mount TO-263 (D2PAK) package. This thyristor is designed for high-voltage switching applications requiring robust current handling and reliable gate triggering characteristics. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching voltage ratings, package compatibility, and thermal operating ranges while accommodating variations in current ratings and gate trigger specifications within acceptable application parameters.

Substiute Parts

S8055NTP

Littelfuse Inc.In Stock: 818S8055NTP Datasheet

Current PartRFQ

CS19-08HO1S-TRL

IXYSIn Stock: 1683CS19-08HO1S-TRL Datasheet

MFR RecommendedRFQ

TN2540-800G-TR

STMicroelectronicsIn Stock: 3305TN2540-800G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the S8055NTP is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - Off State: 800V (exact match required)
• SCR Type: Standard Recovery (exact match required)
• Package / Case: TO-263-3, D2PAK (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -40°C to 125°C (exact match required)

Allowable Parameter Variations:

• Current - On State (It RMS): May be lower than 55A; substitute parts with reduced current ratings are acceptable for applications not requiring full 55A capacity
• Voltage - Gate Trigger (Vgt) Max: Variations within 1.3V to 1.5V range are acceptable
• Current - Gate Trigger (Igt) Max: Variations within 28mA to 40mA range are acceptable
• Voltage - On State (Vtm) Max: Variations within 1.6V to 1.8V range are acceptable
• Current - Hold (Ih) Max: Variations within 50mA to 60mA range are acceptable

The identified substitute parts CS19-08HO1S-TRL and TN2540-800G-TR meet all mandatory matching criteria while operating within acceptable parameter variation ranges.

Parameter Comparison

Engineering Selection Recommendations

All three parts—S8055NTP, CS19-08HO1S-TRL, and TN2540-800G-TR—maintain active product status and full RoHS3 compliance with unlimited moisture sensitivity ratings. Selection between these parts depends on application current requirements:

S8055NTP (Littelfuse Inc.): Primary selection for applications requiring the full 55A RMS current rating. Offers the highest current capacity among the three options.

CS19-08HO1S-TRL (IXYS): Suitable for applications requiring up to 29A RMS current. Provides intermediate current capacity with gate trigger specifications matching the primary part. Available in Tape & Reel packaging.

TN2540-800G-TR (STMicroelectronics): Suitable for applications requiring up to 25A RMS current. Features the lowest gate trigger voltage (1.3V) among the three options, potentially reducing gate drive circuit complexity. Available in Cut Tape and Digi-Reel packaging.

All parts share identical 800V off-state voltage, standard recovery characteristics, TO-263 D2PAK package geometry, and -40°C to 125°C operating temperature range, ensuring mechanical and thermal compatibility in PCB layouts and thermal management designs.

Frequently Asked Questions (FAQ)

Q: Can CS19-08HO1S-TRL or TN2540-800G-TR replace S8055NTP in all applications?

A: Substitution is valid only for applications where the required on-state current does not exceed the substitute part's rating. CS19-08HO1S-TRL supports up to 29A RMS and TN2540-800G-TR supports up to 25A RMS. Applications requiring the full 55A RMS capacity of S8055NTP cannot use these substitutes.

Q: Are the package dimensions identical across all three parts?

A: All three parts use the TO-263-3 D2PAK package with identical pinout and mechanical dimensions, ensuring direct PCB layout compatibility without redesign.

Q: What are the key differences in gate trigger characteristics?

A: TN2540-800G-TR has the lowest gate trigger voltage at 1.3V maximum, compared to 1.5V for both S8055NTP and CS19-08HO1S-TRL. Gate trigger current ranges from 28mA (CS19-08HO1S-TRL) to 40mA (S8055NTP and TN2540-800G-TR). These variations may affect gate drive circuit design but do not prevent substitution within the specified parameter ranges.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are RoHS3 compliant, REACH unaffected, carry EAR99 ECCN classification, and maintain unlimited moisture sensitivity rating (MSL 1).

Q: What packaging options are available for each substitute?

A: S8055NTP is supplied in Tube packaging. CS19-08HO1S-TRL is supplied in Tape & Reel (TR). TN2540-800G-TR is supplied in Cut Tape (CT) and Digi-Reel packaging. Packaging selection depends on assembly process requirements and order quantities.