S8X8ESAP Equivalent & Substitute Parts

Part Overview

The S8X8ESAP is a sensitive gate SCR (Silicon Controlled Rectifier) rated for 800V off-state voltage with 800mA RMS current capability in a through-hole TO-92 package. This component is manufactured by Littelfuse Inc. and maintains Active product status with full ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the thyristor category, enabling direct replacement in applications requiring 800V SCR functionality with sensitive gate triggering characteristics.

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 (RMS)) (Max)	800 mA
Current - Hold (Ih) (Max)	5 mA
SCR Type	Sensitive Gate
Operating Temperature	-40°C ~ 125°C
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA) Formed Leads
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the S8X8ESAP are qualified based on the following critical parameters that determine functional equivalence:

Off-state voltage rating of 800V
Sensitive gate SCR type classification
Gate trigger voltage (Vgt) maximum of 800mV
Gate trigger current (Igt) maximum of 200µA or lower
On-state RMS current capability of 1.25A or higher
Through-hole mounting in TO-92-3 package configuration
Operating temperature range of -40°C to 125°C
ROHS3 compliance and REACH unaffected status

The identified substitutes meet or exceed these parameters while maintaining mechanical and electrical compatibility for direct board-level replacement.

Parameter Comparison

Parameter	S8X8ESAP (Littelfuse)	TS110-8A2-AP (STMicroelectronics)	X0202NA 1BA2 (STMicroelectronics)
Voltage - Off State	800 V	800 V	800 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV	800 mV	800 mV
Current - Gate Trigger (Igt) (Max)	200 µA	100 µA	200 µA
Voltage - On State (Vtm) (Max)	1.7 V	1.6 V	1.45 V
Current - On State (It (RMS)) (Max)	800 mA	1.25 A	1.25 A
Current - Hold (Ih) (Max)	5 mA	12 mA	5 mA
Current - Off State (Max)	3 µA	1 µA	5 µA
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both substitute parts maintain Active product status and full ROHS3 compliance equivalent to the S8X8ESAP. TS110-8A2-AP and X0202NA 1BA2 are manufactured by STMicroelectronics and provide enhanced current handling capability at 1.25A RMS compared to the original 800mA specification. Both substitutes are available in Cut Tape and Bulk packaging options respectively, with inventory availability supporting production requirements. Selection between substitutes depends on packaging format requirements and lead time considerations, as electrical parameters remain within acceptable tolerance bands for 800V sensitive gate SCR applications.

Frequently Asked Questions (FAQ)

Q: Can TS110-8A2-AP directly replace S8X8ESAP in existing designs?

A: Yes. Both components share identical 800V off-state voltage, 800mV gate trigger voltage, and TO-92-3 package configuration. TS110-8A2-AP provides higher RMS current capability (1.25A vs 800mA) and lower on-state voltage (1.6V vs 1.7V), making it functionally compatible for direct board-level substitution.

Q: What is the difference between TS110-8A2-AP and X0202NA 1BA2?

A: Both are STMicroelectronics 800V sensitive gate SCRs in TO-92-3 packages with 1.25A RMS current rating. Primary differences are packaging format (Cut Tape vs Bulk) and gate trigger current specification (100µA vs 200µA). X0202NA 1BA2 features lower on-state voltage (1.45V) and higher surge current rating (25A vs 21A).

Q: Are all three parts ROHS3 compliant?

A: Yes. S8X8ESAP, TS110-8A2-AP, and X0202NA 1BA2 are all ROHS3 compliant with REACH unaffected status, meeting environmental and regulatory requirements for industrial and commercial applications.

Q: What packaging options are available for these substitutes?

A: TS110-8A2-AP is supplied in Cut Tape (CT) packaging. X0202NA 1BA2 is supplied in Bulk packaging. Both maintain TO-92-3 through-hole package configuration for identical PCB footprint compatibility.

Q: Do the substitutes maintain the same operating temperature range?

A: Yes. All three parts operate across -40°C to 125°C, ensuring thermal compatibility in equivalent application environments.

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