S8X8TS2RP Equivalent & Substitute Parts

Part Overview

The S8X8TS2RP is a Sensitive Gate SCR (Silicon Controlled Rectifier) rated for 800V off-state voltage with 800mA on-state current capability in a surface mount SOT-223 package. Manufactured by Littelfuse Inc., this component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified to provide equivalent or enhanced performance characteristics for applications requiring 800V thyristor functionality with compatible electrical and mechanical specifications.

Key Parameters

Parameter	Value
Voltage - Off State	800 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV
Current - Gate Trigger (Igt) (Max)	50 µA
Voltage - On State (Vtm) (Max)	1.7 V
Current - On State (It (RMS)) (Max)	800 mA
Current - Hold (Ih) (Max)	5 mA
Operating Temperature Range	-40°C to 125°C
Package / Case	TO-261-4, TO-261AA (SOT-223)
Mounting Type	Surface Mount
SCR Type	Sensitive Gate

Substitute Part Grouping Explanation

Substitution eligibility for the S8X8TS2RP is determined by the following critical parameters:

Off-state voltage rating of 800V (minimum requirement for voltage class compatibility)
Sensitive Gate SCR type classification
SOT-223 surface mount package compatibility (TO-261-4, TO-261AA)
Operating temperature range of -40°C to 125°C
ROHS3 compliance and REACH unaffected status

The substitute part X0202NN 5BA4 (STMicroelectronics) meets all substitution criteria. This part maintains the 800V off-state voltage rating, Sensitive Gate configuration, and identical package specifications. The substitute demonstrates enhanced current handling capability (1.25A RMS vs. 800mA RMS) and improved surge current ratings, making it suitable for applications where the S8X8TS2RP is specified.

Parameter Comparison

Parameter	S8X8TS2RP (Littelfuse)	X0202NN 5BA4 (STMicroelectronics)
Voltage - Off State	800 V	800 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV	800 mV
Current - Gate Trigger (Igt) (Max)	50 µA	200 µA
Voltage - On State (Vtm) (Max)	1.7 V	1.45 V
Current - On State (It (RMS)) (Max)	800 mA	1.25 A
Current - Hold (Ih) (Max)	5 mA	5 mA
Current - Off State (Max)	3 µA	5 µA
Operating Temperature Range	-40°C to 125°C	-40°C to 125°C
Package / Case	TO-261-4, TO-261AA	TO-261-4, TO-261AA
Mounting Type	Surface Mount	Surface Mount
SCR Type	Sensitive Gate	Sensitive Gate
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both the S8X8TS2RP and X0202NN 5BA4 are Active product status components with ROHS3 compliance and REACH unaffected designation, meeting current regulatory requirements for industrial and commercial applications. The X0202NN 5BA4 substitute provides equivalent voltage and temperature specifications with enhanced current handling capacity. Selection between these parts depends on application current requirements and circuit design margins. Both components are suitable for 800V thyristor applications requiring sensitive gate triggering in surface mount SOT-223 configurations.

Frequently Asked Questions (FAQ)

Q: Can the X0202NN 5BA4 directly replace the S8X8TS2RP in existing designs?

A: Yes. Both parts share identical off-state voltage (800V), gate trigger voltage (800mV maximum), hold current (5mA maximum), operating temperature range (-40°C to 125°C), and package specifications (SOT-223). The substitute is pin-compatible and functionally equivalent for 800V thyristor applications.

Q: What are the key differences between these parts?

A: The X0202NN 5BA4 offers higher on-state current rating (1.25A RMS vs. 800mA RMS) and improved surge current capability (25A vs. 10A at 60Hz). The substitute also features lower on-state voltage (1.45V vs. 1.7V maximum) and higher gate trigger current (200µA vs. 50µA maximum).

Q: Are both parts available in the same packaging?

A: Yes. Both the S8X8TS2RP and X0202NN 5BA4 are supplied in SOT-223 surface mount packages with TO-261-4 and TO-261AA case designations, ensuring mechanical and electrical compatibility on PCB layouts.

Q: Do both parts meet the same compliance standards?

A: Yes. Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for industrial applications.

Q: Which part should be selected for new designs?

A: Selection is based on application current requirements. For applications requiring up to 800mA RMS, either part is suitable. For applications requiring higher current capacity or improved thermal performance, the X0202NN 5BA4 is the appropriate choice due to its 1.25A RMS rating.

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