S6040NRP Equivalent & Substitute Parts

Part Overview

The S6040NRP is a silicon-controlled rectifier (SCR) manufactured by Littelfuse Inc., rated for 600V off-state voltage with 40A RMS on-state current capability. This thyristor is designed for surface mount applications in the TO-263 (D2PAK) package and maintains active product status with full RoHS3 compliance. Equivalent and substitute parts are identified based on matching voltage ratings, package compatibility, and thermal operating ranges to ensure functional interchangeability within specified electrical parameters.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	600	V
Current - On State (It RMS)	40	A
Voltage - On State (Vtm Max)	1.8	V
Voltage - Gate Trigger (Vgt Max)	1.5	V
Current - Gate Trigger (Igt Max)	40	mA
Operating Temperature Range	-40 to 125	°C
Package / Case	TO-263-3, D2PAK	—
Mounting Type	Surface Mount	—
SCR Type	Standard Recovery	—

Substitute Part Grouping Explanation

Substitution eligibility for the S6040NRP is determined by the following criteria:

Primary Matching Parameters:

Off-state voltage rating of 600V (mandatory for voltage compatibility)
Standard Recovery SCR type (functional equivalence)
Surface mount D2PAK package configuration (mechanical and thermal compatibility)
Operating temperature range of -40°C to 125°C or higher (thermal envelope compatibility)

Current Rating Considerations: Substitute parts are grouped by on-state RMS current capacity. Parts with equal or higher current ratings (40A or greater) provide direct substitution. Parts with lower current ratings (12A, 25A) are listed as alternatives for applications with reduced current requirements but maintain full voltage and package compatibility.

Electrical Parameter Tolerance: Gate trigger voltage (Vgt) and on-state voltage (Vtm) variations within manufacturer specifications do not preclude substitution, as these parameters remain within standard SCR operating margins for 600V applications.

Parameter Comparison

Parameter	S6040NRP	S6055NRP	TN1205H-6G-TR	TN1215-600G-TR	TN2540-600G-TR
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	STMicroelectronics	STMicroelectronics	STMicroelectronics
Voltage - Off State (V)	600	600	600	600	600
Current - On State (It RMS) (A)	40	55	12	12	25
Voltage - On State (Vtm Max) (V)	1.8	1.8	1.6	1.6	1.6
Voltage - Gate Trigger (Vgt Max) (V)	1.5	1.5	1.3	1.3	1.3
Current - Gate Trigger (Igt Max) (mA)	40	40	5	15	40
Operating Temperature Range (°C)	-40 to 125	-40 to 125	-40 to 150	-40 to 125	-40 to 125
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
SCR Type	Standard Recovery	Standard Recovery	Standard Recovery	Standard Recovery	Standard Recovery
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent (Higher Current Rating): The S6055NRP from Littelfuse Inc. provides parametric equivalence with increased current capacity (55A RMS vs. 40A RMS). Both devices share identical voltage ratings, gate trigger specifications, and thermal operating ranges. This part is suitable for applications requiring higher current margins while maintaining identical package and compliance certifications.

Cross-Manufacturer Alternatives (STMicroelectronics): The TN1205H-6G-TR, TN1215-600G-TR, and TN2540-600G-TR from STMicroelectronics maintain 600V voltage compatibility and D2PAK package configuration. These parts feature lower gate trigger voltage (1.3V vs. 1.5V) and reduced on-state voltage (1.6V vs. 1.8V), with current ratings of 12A, 12A, and 25A respectively. All substitute parts maintain ROHS3 compliance and active product status. Selection among these alternatives depends on application current requirements and gate drive circuit compatibility.

Thermal Considerations: The TN1205H-6G-TR supports an extended operating temperature range (-40°C to 150°C) compared to the S6040NRP (-40°C to 125°C), providing additional thermal margin for high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the S6055NRP directly replace the S6040NRP? A: Yes. The S6055NRP maintains identical voltage ratings (600V), gate trigger specifications (1.5V max), on-state voltage (1.8V max), and package configuration (TO-263 D2PAK). The increased current rating (55A vs. 40A) provides additional capacity without affecting circuit compatibility.

Q: Are STMicroelectronics parts (TN series) compatible with S6040NRP applications? A: Compatibility depends on application current requirements. All TN series parts maintain 600V voltage compatibility and D2PAK package configuration. However, gate trigger voltage is lower (1.3V vs. 1.5V) and on-state voltage is reduced (1.6V vs. 1.8V). Current ratings range from 12A to 25A, requiring evaluation against circuit specifications. Gate drive circuits must accommodate the lower trigger voltage threshold.

Q: What is the significance of the current rating difference between S6040NRP (40A) and S6055NRP (55A)? A: The current rating indicates maximum RMS on-state current capacity. The S6055NRP supports 15A additional capacity, providing design margin for thermal management and transient current handling. Both parts share identical voltage and package specifications, making the S6055NRP suitable for higher-current applications.

Q: Can lower-rated parts (TN1205H-6G-TR at 12A) be used in S6040NRP applications? A: Lower-rated parts are suitable only for applications with reduced current requirements. The 12A rating of the TN1205H-6G-TR is insufficient for circuits designed for 40A operation. Package and voltage compatibility alone do not ensure functional equivalence; current capacity must match or exceed application demands.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts (S6055NRP, TN1205H-6G-TR, TN1215-600G-TR, TN2540-600G-TR) maintain ROHS3 compliance and active product status, ensuring regulatory compatibility with the original S6040NRP.

Q: What packaging formats are available for these parts? A: The S6040NRP and S6055NRP are supplied in Tape & Reel (TR) format. The TN1205H-6G-TR is available in Tape & Reel (TR), while TN1215-600G-TR is supplied in Cut Tape (CT) & Digi-Reel format, and TN2540-600G-TR is available in Tape & Reel (TR). Packaging selection depends on assembly process requirements.

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