S6X8ES2AP Equivalent & Substitute Parts

Part Overview

The S6X8ES2AP is a 600V, 800mA sensitive gate SCR (Silicon Controlled Rectifier) manufactured by Littelfuse Inc. in TO-92 through-hole packaging. This component is classified as Active status and is ROHS3 compliant. Substitute parts are necessary when the original part becomes unavailable, when alternative packaging formats are required, or when design flexibility demands components from different manufacturers with equivalent electrical and mechanical specifications.

Key Parameters

Parameter	S6X8ES2AP
Voltage - Off State	600 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	-40°C ~ 125°C
Mounting Type	Through Hole
Package / Case	TO-92-3
SCR Type	Sensitive Gate
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the S6X8ES2AP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Off State: 600 V (exact match required)
Voltage - Gate Trigger (Vgt) (Max): 800 mV (exact match required)
Current - On State (It (RMS)) (Max): 800 mA (exact match required)
SCR Type: Sensitive Gate (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: TO-92-3 (exact match required)
Operating Temperature: -40°C ~ 125°C (exact match required)

Secondary Substitution Parameters (Allowable Variation):

Current - Gate Trigger (Igt) (Max): May vary (50 µA to 200 µA acceptable)
Voltage - On State (Vtm) (Max): May vary (1.35 V to 1.95 V acceptable)
Current - On State (It (AV)) (Max): May vary (500 mA to 800 mA acceptable)
Current - Off State (Max): May vary (1 µA to 10 µA acceptable)

Substitute parts are grouped into two categories: direct electrical equivalents (matching all primary criteria with minor secondary parameter variations) and functional alternatives (matching primary criteria but with higher current ratings suitable for applications requiring additional headroom).

Parameter Comparison

Parameter	S6X8ES2AP	P0111MA 1AA3	P0118MA 2AL3	X00602MA 1AA2	X00602MA 2AL2	X00602MA 5AL2	X00619MA5AL2	X0202MA 1BA2	X0202MA 2BL2	X0205MA 2BL2
Voltage - Off State	600 V	600 V	600 V	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	800 mV	800 mV	800 mV
Current - Gate Trigger (Igt) (Max)	50 µA	25 µA	5 µA	200 µA	200 µA	200 µA	200 µA	200 µA	200 µA	50 µA
Voltage - On State (Vtm) (Max)	1.7 V	1.95 V	1.95 V	1.35 V	1.35 V	1.35 V	1.35 V	1.45 V	1.45 V	1.45 V
Current - On State (It (AV)) (Max)	510 mA	500 mA	500 mA	500 mA	500 mA	500 mA	500 mA	800 mA	800 mA	800 mA
Current - On State (It (RMS)) (Max)	800 mA	800 mA	800 mA	800 mA	800 mA	800 mA	800 mA	1.25 A	1.25 A	1.25 A
Current - Hold (Ih) (Max)	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA
Current - Off State (Max)	3 µA	10 µA	10 µA	1 µA	1 µA	1 µA	1 µA	5 µA	5 µA	5 µA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (800 mA RMS Rating):

P0111MA 1AA3, P0118MA 2AL3, X00602MA 1AA2, X00602MA 5AL2, and X00619MA5AL2 are direct substitutes for the S6X8ES2AP. All maintain the 600V off-state voltage, 800 mV gate trigger voltage, and 800 mA RMS current rating. These parts are manufactured by STMicroelectronics and are ROHS3 compliant. P0111MA 1AA3 and P0118MA 2AL3 feature lower gate trigger current specifications (25 µA and 5 µA respectively), providing enhanced gate sensitivity. X00602MA variants offer lower on-state voltage (1.35 V) compared to the original part (1.7 V), resulting in reduced power dissipation. All direct equivalents are available in Active product status except X00602MA 2AL2, which is Obsolete.

Functional Alternatives (1.25 A RMS Rating):

X0202MA 1BA2, X0202MA 2BL2, and X0205MA 2BL2 are functional alternatives with higher current ratings (1.25 A RMS). These parts maintain all primary substitution criteria but provide increased current capacity. X0205MA 2BL2 matches the original gate trigger current specification (50 µA), while X0202MA variants specify 200 µA. These alternatives are suitable for applications requiring additional thermal or current margin. All three are Active status and ROHS3 compliant.

Packaging Considerations:

The S6X8ES2AP is supplied in Tape & Box (TB) packaging. Substitute parts are available in Bulk, Cut Tape (CT), and Tape & Box formats. Cut Tape and Bulk packaging options provide flexibility for different procurement and assembly workflows while maintaining identical electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can P0111MA 1AA3 replace S6X8ES2AP directly in my circuit?

A: Yes. P0111MA 1AA3 is a direct electrical equivalent. Both parts share identical 600V off-state voltage, 800 mV gate trigger voltage, and 800 mA RMS current rating. The lower gate trigger current (25 µA vs. 50 µA) provides improved gate sensitivity, which is beneficial in most applications. Both are ROHS3 compliant and use TO-92-3 through-hole packaging.

Q: What is the difference between X00602MA 1AA2 and X00602MA 2AL2?

A: These parts are electrically identical. The difference is packaging format: X00602MA 1AA2 is supplied in Bulk packaging, while X00602MA 2AL2 is supplied in Cut Tape (CT). X00602MA 2AL2 is classified as Obsolete status, whereas X00602MA 1AA2 is Active. For new designs, X00602MA 1AA2 is recommended.

Q: Why would I choose X0202MA 2BL2 over P0111MA 1AA3?

A: X0202MA 2BL2 provides higher current capacity (1.25 A RMS vs. 800 mA RMS) while maintaining the same 600V voltage rating and TO-92-3 package. This higher rating offers additional thermal margin and current headroom for applications approaching the original part's current limits. Both are Active status and ROHS3 compliant.

Q: Are all substitute parts available in TO-92-3 packaging?

A: Yes. All substitute parts listed are manufactured in TO-92-3 through-hole packaging, identical to the S6X8ES2AP. Packaging format variations (Bulk, Cut Tape, Tape & Box) refer to supply and handling methods, not the component package itself.

Q: Can I use X00602MA 5AL2 if my original design specified S6X8ES2AP?

A: Yes, with the caveat that X00602MA 5AL2 is Active status. X00602MA 5AL2 is electrically equivalent to S6X8ES2AP with identical voltage and current ratings. However, note that X00602MA 2AL2 (Obsolete status) is also listed in the substitute group; for new procurement, X00602MA 5AL2 is the recommended variant.

Q: What does "Sensitive Gate" mean for SCR selection?

A: Sensitive Gate indicates the SCR requires lower gate trigger current (typically 5 µA to 200 µA) to switch on compared to standard SCRs. All parts in this substitution group are Sensitive Gate types, ensuring consistent gate drive requirements across the entire substitute family.

Q: Is there a performance difference between Littelfuse S6X8ES2AP and STMicroelectronics P0111MA 1AA3?

A: Both parts meet identical electrical specifications for voltage, current, and temperature ratings. Differences exist in secondary parameters: P0111MA 1AA3 has lower gate trigger current (25 µA vs. 50 µA) and slightly higher on-state voltage (1.95 V vs. 1.7 V). These variations are within acceptable substitution tolerances and do not affect circuit functionality in standard applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message