S6055NTP Equivalent & Substitute Parts

Part Overview

The S6055NTP is a 600V 55A standard recovery SCR (silicon-controlled rectifier) manufactured by Littelfuse in a surface mount TO-263 (D2PAK) package. This thyristor is designed for high-current switching applications requiring robust voltage blocking capability and thermal management in compact form factors. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and power conversion applications.

Equivalent and substitute parts are identified when design requirements permit operation at reduced current ratings or when supply chain considerations necessitate alternative sourcing while maintaining electrical and mechanical compatibility within the TO-263 package family.

Substiute Parts

S6055NTP

LittelfuseIn Stock: 1188S6055NTP Datasheet

Current PartRFQ

TN1205H-6G-TR

STMicroelectronicsIn Stock: 1598TN1205H-6G-TR Datasheet

MFR RecommendedRFQ

TN2540-600G-TR

STMicroelectronicsIn Stock: 1145TN2540-600G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the S6055NTP is determined by the following mandatory criteria:

• Voltage Rating: Off-state voltage must equal or exceed 600V
• Package Compatibility: Must use TO-263-3 or D2PAK (2 Leads + Tab) form factor for direct PCB mounting compatibility
• Mounting Type: Surface mount configuration required
• SCR Type: Standard recovery thyristor classification
• Compliance: RoHS3 compliant status maintained

The identified substitute parts operate at reduced on-state current ratings (12A and 25A RMS versus 55A RMS for the main part). These substitutes are applicable only in circuit designs where the maximum current requirement does not exceed the substitute part's rated capacity. Both substitute parts maintain the 600V voltage blocking capability and D2PAK package footprint, ensuring mechanical and electrical interface compatibility.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status with full RoHS3 compliance and REACH unaffected classification, ensuring regulatory alignment for industrial applications.

S6055NTP (Primary Part): Select when circuit design requires maximum on-state current capacity of 55A RMS with surge handling to 650A at 60Hz. Littelfuse sourcing provides established supply chain presence with 1093 units in current inventory.

TN2540-600G-TR (Preferred Substitute): Select for applications requiring 25A RMS on-state current or less. This STMicroelectronics part provides the closest current rating match to the primary part while maintaining 600V blocking voltage and D2PAK package compatibility. Surge capability reaches 314A at 60Hz. Operating temperature range matches the primary part (-40 to 125°C). STMicroelectronics inventory shows 1130 units available.

TN1205H-6G-TR (Secondary Substitute): Select only for applications requiring 12A RMS on-state current or less. This part offers the lowest current rating among the three options with surge capability to 126A at 60Hz. Gate trigger current requirement is reduced to 5mA maximum. Extended operating temperature range to 150°C provides additional thermal margin. STMicroelectronics inventory shows 1530 units available.

Frequently Asked Questions (FAQ)

Q: Can TN1205H-6G-TR or TN2540-600G-TR be used as direct replacements for S6055NTP?

A: Direct replacement is possible only if circuit design permits operation at the reduced on-state current ratings. TN1205H-6G-TR supports maximum 12A RMS; TN2540-600G-TR supports maximum 25A RMS. If the application requires sustained current above these limits, the S6055NTP at 55A RMS is the only suitable option among these three parts.

Q: Are the D2PAK packages identical across all three parts?

A: Yes. All three parts use TO-263-3 D2PAK (2 Leads + Tab) package configuration, ensuring identical PCB footprint and mounting compatibility. No layout modifications are required when substituting between these parts.

Q: What is the impact of different gate trigger voltage specifications?

A: The S6055NTP specifies 1.5V maximum gate trigger voltage, while both STMicroelectronics substitutes specify 1.3V maximum. Lower gate trigger voltage in the substitutes may require gate drive circuit adjustment if the original design operates near the 1.5V threshold. Gate trigger current differs: S6055NTP and TN2540-600G-TR both specify 40mA maximum, while TN1205H-6G-TR specifies 5mA maximum, requiring gate drive circuit redesign for the lower-current part.

Q: Do operating temperature ranges affect substitution decisions?

A: The S6055NTP and TN2540-600G-TR both operate from -40 to 125°C. The TN1205H-6G-TR extends to 150°C maximum, providing additional thermal headroom in high-temperature environments. If application temperature remains within -40 to 125°C, all three parts are equivalent in this parameter.

Q: What surge current differences should be considered?

A: Non-repetitive surge current ratings differ significantly. S6055NTP handles 650A at 60Hz; TN2540-600G-TR handles 314A; TN1205H-6G-TR handles 126A. Applications with high inrush current or transient surge events must verify that the substitute part's surge rating remains adequate for the specific circuit conditions.

Q: Are all three parts available with the same packaging format?

A: S6055NTP is supplied in Tube packaging; both STMicroelectronics substitutes are supplied in Tape & Reel (TR) format. This difference affects component handling and assembly processes but does not impact electrical or mechanical compatibility once mounted on the PCB.