S6X8TS1RP Equivalent & Substitute Parts

Part Overview

The S6X8TS1RP is a Sensitive Gate SCR (Silicon Controlled Rectifier) rated for 600V off-state voltage and 800mA on-state current in SOT-223 surface mount packaging, manufactured by Littelfuse Inc. This thyristor is designed for applications requiring controlled rectification and switching in low-to-medium power circuits. The part is currently Active in product status with 27,300 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility to support design flexibility, inventory optimization, and supply chain continuity.

Key Parameters

Parameter	S6X8TS1RP
Voltage - Off State	600 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV
Current - Gate Trigger (Igt) (Max)	5 µA
Voltage - On State (Vtm) (Max)	1.7 V
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
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 S6X8TS1RP is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Off State: 600 V (exact match required)
Voltage - Gate Trigger (Vgt) (Max): 800 mV (exact match required)
Voltage - On State (Vtm) (Max): ≤ 1.7 V (equal or lower acceptable)
Current - On State (It (RMS)) (Max): ≥ 800 mA (equal or higher acceptable)
SCR Type: Sensitive Gate (exact match required)
Package / Case: TO-261-4, TO-261AA (exact match required)
Supplier Device Package: SOT-223 (exact match required)

Secondary Compatibility Factors:

Operating Temperature Range: -40°C ~ 125°C or wider (equal or wider acceptable)
RoHS Status: ROHS3 Compliant (required)
Moisture Sensitivity Level: 1 (Unlimited) (required)

Substitute parts are grouped into two categories based on on-state current rating: Standard Current (800 mA) and Enhanced Current (1.25 A and above). Parts with higher current ratings provide design margin and are suitable for applications where the original 800 mA specification is adequate.

Parameter Comparison

Parameter	S6X8TS1RP	MCR08MT1G	NYC228STT1G	P0102MN 5AA4	P0111MN 5AA4	X00619MN5AL2	X0202MN 5BA4
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	600 V	600 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV	800 mV	800 mV	800 mV	800 mV	800 mV	800 mV
Current - Gate Trigger (Igt) (Max)	5 µA	200 µA	200 µA	200 µA	25 µA	200 µA	200 µA
Voltage - On State (Vtm) (Max)	1.7 V	1.7 V	1.7 V	1.95 V	1.95 V	1.35 V	1.45 V
Current - On State (It (RMS)) (Max)	800 mA	800 mA	1.5 A	800 mA	800 mA	800 mA	1.25 A
Current - Hold (Ih) (Max)	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA
Current - Off State (Max)	3 µA	10 µA	10 µA	10 µA	10 µA	1 µA	5 µA
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate
Operating Temperature	-40°C ~ 125°C	-40°C ~ 110°C	-40°C ~ 110°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA
Supplier Device Package	SOT-223	SOT-223	SOT-223	SOT-223	SOT-223	SOT-223	SOT-223
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating, ensuring compatibility with standard manufacturing and storage requirements.

MCR08MT1G (Littelfuse Inc.): Direct electrical equivalent with 800 mA on-state current. Operating temperature range limited to -40°C ~ 110°C. Suitable for applications within this thermal envelope. 13,400 units in stock.

NYC228STT1G (Littelfuse Inc.): Enhanced current rating of 1.5 A provides design margin above the 800 mA specification. Operating temperature range limited to -40°C ~ 110°C. Suitable for applications requiring higher current capacity within this thermal envelope. 20,100 units in stock.

P0102MN 5AA4 (STMicroelectronics): Maintains 800 mA on-state current with on-state voltage of 1.95 V (higher than S6X8TS1RP at 1.7 V). Operating temperature range -40°C ~ 125°C matches the original part. 6,300 units in stock.

P0111MN 5AA4 (STMicroelectronics): Maintains 800 mA on-state current with on-state voltage of 1.95 V. Gate trigger current of 25 µA is closer to the original 5 µA specification than other STMicroelectronics options. Operating temperature range -40°C ~ 125°C matches the original part. 2,310 units in stock.

X00619MN5AL2 (STMicroelectronics): Maintains 800 mA on-state current with the lowest on-state voltage of 1.35 V and lowest off-state current of 1 µA. Operating temperature range -40°C ~ 125°C matches the original part. 2,700 units in stock.

X0202MN 5BA4 (STMicroelectronics): Enhanced current rating of 1.25 A provides design margin. On-state voltage of 1.45 V is lower than the original 1.7 V. Operating temperature range -40°C ~ 125°C matches the original part. Highest inventory availability at 37,594 units in stock.

Frequently Asked Questions (FAQ)

Q: Can MCR08MT1G replace S6X8TS1RP in all applications?

A: MCR08MT1G is electrically equivalent with matching 600V, 800mV gate trigger, and 800mA on-state current specifications. The primary difference is the operating temperature range, which is limited to -40°C ~ 110°C versus the original -40°C ~ 125°C. Substitution is valid for applications operating within the -40°C ~ 110°C range.

Q: What is the advantage of using NYC228STT1G or X0202MN 5BA4 over the original S6X8TS1RP?

A: Both parts offer higher on-state current ratings (1.5 A and 1.25 A respectively) compared to the original 800 mA specification. This provides design margin and allows the same physical package to handle higher current loads. Both maintain the 600V off-state voltage and 800mV gate trigger specifications.

Q: Are there differences in gate trigger current between substitute parts?

A: Yes. The original S6X8TS1RP specifies 5 µA maximum gate trigger current. Most substitutes specify 200 µA, which is higher. P0111MN 5AA4 specifies 25 µA, which is closer to the original. Applications with tight gate drive requirements should account for this difference.

Q: Which substitute part has the lowest on-state voltage drop?

A: X00619MN5AL2 specifies 1.35 V maximum on-state voltage, which is the lowest among all listed parts. This results in lower power dissipation during conduction. The original S6X8TS1RP specifies 1.7 V.

Q: Can I use substitute parts with higher on-state current ratings in place of the S6X8TS1RP?

A: Yes. NYC228STT1G (1.5 A) and X0202MN 5BA4 (1.25 A) are rated for higher on-state current than the original 800 mA specification. These parts are mechanically and electrically compatible and provide additional current capacity. The circuit will operate within the lower current envelope of the original design.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging is supplied in individual strips suitable for manual handling and smaller quantity orders. Tape & Reel packaging is supplied on continuous reels for automated assembly equipment. Both formats contain the same electronic component in SOT-223 package. Selection depends on assembly process requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating, ensuring compatibility with standard manufacturing processes and environmental regulations.

Q: Which substitute part should I select for maximum design margin?

A: X0202MN 5BA4 offers the combination of enhanced current rating (1.25 A), lower on-state voltage (1.45 V), and highest inventory availability (37,594 units). This part provides both electrical margin and supply chain stability.

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