SCR 16TTS08S Equivalent & Substitute Parts

Part Overview

The 16TTS08S is an 800V, 16A standard recovery thyristor (SCR) manufactured by Vishay General Semiconductor - Diodes Division in a surface mount TO-263AB (D2PAK) package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a temperature range of -40°C to 125°C and is designed for applications requiring high-voltage switching and control functions.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	800	V
Voltage - Gate Trigger (Vgt) Max	2	V
Current - Gate Trigger (Igt) Max	60	mA
Voltage - On State (Vtm) Max	1.4	V
Current - On State (It RMS) Max	16	A
Current - Hold (Ih) Max	100	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 for the 16TTS08S is determined by the following critical parameters:

Off-state voltage rating: 800V minimum
RMS on-state current capability: 16A minimum
Package compatibility: TO-263-3 / D2PAK surface mount form factor
SCR type: Standard Recovery
Operating temperature range: -40°C to 125°C minimum
Gate trigger characteristics: Vgt and Igt within acceptable application tolerances

Two qualified substitute parts meet these criteria: the S8016NTP (Littelfuse Inc., Teccor® series, active status) and the TN2540-800G-TR (STMicroelectronics, active status). Both maintain the 800V voltage rating, surface mount D2PAK packaging, and standard recovery SCR topology. The TN2540-800G-TR provides enhanced current capability at 25A RMS, exceeding the original 16A specification.

Parameter Comparison

Parameter	16TTS08S (Vishay)	S8016NTP (Littelfuse)	TN2540-800G-TR (STMicroelectronics)	Unit
Voltage - Off State	800	800	800	V
Voltage - Gate Trigger (Vgt) Max	2	1.5	1.3	V
Current - Gate Trigger (Igt) Max	60	30	40	mA
Voltage - On State (Vtm) Max	1.4	1.6	1.6	V
Current - On State (It RMS) Max	16	16	25	A
Current - Hold (Ih) Max	100	40	50	mA
Current - Off State Max	500	20	5	µA
Operating Temperature Range	-40 to 125	-40 to 125	-40 to 125	°C
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	-
Mounting Type	Surface Mount	Surface Mount	Surface Mount	-
SCR Type	Standard Recovery	Standard Recovery	Standard Recovery	-
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	-
Product Status	Obsolete	Active	Active	-

Engineering Selection Recommendations

S8016NTP (Littelfuse Teccor® Series): This part provides direct functional equivalence with matched 16A RMS current rating and maintains the same D2PAK package footprint. The S8016NTP is actively manufactured and ROHS3 compliant, addressing the obsolescence of the original 16TTS08S. Gate trigger parameters (Vgt 1.5V, Igt 30mA) are more favorable than the original specification, reducing gate drive requirements. This part is suitable for direct replacement in existing designs without circuit modification.

TN2540-800G-TR (STMicroelectronics): This part exceeds the original current specification at 25A RMS while maintaining 800V voltage rating and D2PAK packaging. The TN2540-800G-TR is actively manufactured and ROHS3 compliant. Superior off-state leakage current (5µA versus 500µA) and lower gate trigger voltage (1.3V) provide enhanced performance characteristics. This part is appropriate for applications where increased current margin or improved leakage performance is beneficial, provided circuit design accommodates the higher current rating.

Both substitute parts are actively produced, ROHS3 compliant, and available in standard packaging formats, eliminating the supply constraints associated with the obsolete 16TTS08S.

Frequently Asked Questions (FAQ)

Q: Can the S8016NTP directly replace the 16TTS08S without circuit changes?

A: Yes. The S8016NTP maintains identical voltage rating (800V), RMS current rating (16A), operating temperature range (-40°C to 125°C), and D2PAK package configuration. Gate trigger parameters are more favorable, requiring lower gate drive current. No circuit modification is required.

Q: What is the advantage of using TN2540-800G-TR over S8016NTP?

A: The TN2540-800G-TR provides 25A RMS current capability versus 16A, offering 56% additional current margin. Off-state leakage current is significantly lower (5µA versus 20µA for S8016NTP and 500µA for the original). Gate trigger voltage is lower (1.3V), reducing gate drive power requirements. These characteristics provide enhanced performance and design margin.

Q: Are both substitute parts pin-compatible with the original 16TTS08S?

A: Yes. Both S8016NTP and TN2540-800G-TR use the TO-263-3 (D2PAK) package with identical pin configuration: Gate, Cathode, and Anode connections match the original layout.

Q: What is the difference between the original 16TTS08S and substitute parts regarding compliance?

A: The original 16TTS08S is RoHS non-compliant and obsolete. Both S8016NTP and TN2540-800G-TR are ROHS3 compliant and actively manufactured, meeting current regulatory requirements and ensuring long-term supply availability.

Q: Can TN2540-800G-TR be used in applications designed for 16A operation?

A: Yes. The TN2540-800G-TR is rated for 25A RMS, which exceeds the 16A requirement. The part operates safely at lower current levels. Thermal management and PCB design should account for the higher current capability if the application operates near maximum ratings.

Q: What packaging formats are available for the substitute parts?

A: S8016NTP is supplied in Tube packaging. TN2540-800G-TR is available in Cut Tape (CT) and Digi-Reel® formats. Both are surface mount components suitable for automated assembly processes.

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