S8X8TSRP Equivalent & Substitute Parts

Part Overview

The S8X8TSRP is an 800V, 800mA sensitive gate SCR manufactured by Littelfuse Inc. in SOT-223 surface mount packaging. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value
Voltage - Off State	800 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV
Current - Gate Trigger (Igt) (Max)	200 µA
Voltage - On State (Vtm) (Max)	1.7 V
Current - On State (It (AV)) (Max)	510 mA
Current - On State (It (RMS)) (Max)	800 mA
Current - Hold (Ih) (Max)	5 mA
Current - Off State (Max)	3 µA
SCR Type	Sensitive Gate
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the S8X8TSRP is determined by the following critical parameters:

Off-state voltage rating must equal or exceed 800V
Gate trigger voltage (Vgt) and current (Igt) must match specified maximums
On-state voltage (Vtm) must not exceed the original specification
Sensitive gate SCR type classification must be maintained
Operating temperature range must encompass -40°C to 125°C
Surface mount configuration with SOT-223 package compatibility
RoHS3 compliance and MSL Level 1 rating required

The X0202NN 5BA4 meets all substitution criteria as a sensitive gate SCR with identical off-state voltage, gate trigger specifications, operating temperature range, and package configuration. Enhanced current ratings provide design margin without compromising compatibility.

Parameter Comparison

Parameter	S8X8TSRP (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)	200 µA	200 µA
Voltage - On State (Vtm) (Max)	1.7 V	1.45 V
Current - On State (It (AV)) (Max)	510 mA	800 mA
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
SCR Type	Sensitive Gate	Sensitive Gate
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	TO-261-4, TO-261AA	TO-261-4, TO-261AA
Supplier Device Package	SOT-223	SOT-223
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both the S8X8TSRP and X0202NN 5BA4 are Active product status components with full RoHS3 compliance and REACH unaffected status. Selection between these parts is based on availability and current rating requirements within the specified electrical envelope. The X0202NN 5BA4 provides higher on-state current capacity (1.25A RMS versus 800mA RMS) while maintaining lower on-state voltage drop (1.45V versus 1.7V maximum), offering improved thermal performance in applications operating near rated current levels. Both components share identical gate trigger specifications, hold current, and operating temperature range, ensuring functional equivalence in sensitive gate triggering circuits.

Frequently Asked Questions (FAQ)

Q: Can the X0202NN 5BA4 directly replace the S8X8TSRP in existing designs?

A: Yes. Both components are sensitive gate SCRs with identical 800V off-state voltage, gate trigger voltage and current specifications, operating temperature range, and SOT-223 package configuration. PCB layout and gate drive circuitry require no modification.

Q: What are the key differences between these parts?

A: The X0202NN 5BA4 offers higher on-state current ratings (1.25A RMS versus 800mA RMS) and lower on-state voltage drop (1.45V maximum versus 1.7V maximum). These differences provide design margin in high-current applications without affecting gate triggering behavior or voltage blocking capability.

Q: Are both parts suitable for the same temperature range?

A: Yes. Both components operate across -40°C to 125°C, with identical thermal specifications for this range.

Q: Do packaging and moisture sensitivity requirements differ?

A: No. Both parts use SOT-223 surface mount packaging with MSL Level 1 (Unlimited) moisture sensitivity rating, requiring identical handling and storage procedures.

Q: What compliance certifications apply to both parts?

A: Both the S8X8TSRP and X0202NN 5BA4 are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8541.30.0080.

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