S6X8ES2 SCR 600V 800mA TO-92 Equivalent & Substitute Parts

Part Overview

The S6X8ES2 is a sensitive gate silicon controlled rectifier (SCR) manufactured by Littelfuse Inc., rated for 600V off-state voltage and 800mA RMS on-state current in a through-hole TO-92 package. This component is classified as Active product status with full RoHS3 compliance. Equivalent and substitute parts are identified based on matching electrical ratings, gate characteristics, thermal operating range, and mechanical package compatibility to ensure direct functional replacement in circuit applications.

Substiute Parts

S6X8ES2

Littelfuse Inc.In Stock: 1131S6X8ES2 Datasheet

Current PartRFQ

P0111MA 1AA3

STMicroelectronicsIn Stock: 5452P0111MA 1AA3 Datasheet

MFR RecommendedRFQ

X00602MA 1AA2

STMicroelectronicsIn Stock: 7623X00602MA 1AA2 Datasheet

MFR RecommendedRFQ

X00602MA 5AL2

STMicroelectronicsIn Stock: 3894X00602MA 5AL2 Datasheet

MFR RecommendedRFQ

X00619MA5AL2

STMicroelectronicsIn Stock: 6488X00619MA5AL2 Datasheet

MFR RecommendedRFQ

X0202MA 1BA2

STMicroelectronicsIn Stock: 5541X0202MA 1BA2 Datasheet

MFR RecommendedRFQ

X0202MA 2BL2

STMicroelectronicsIn Stock: 2291X0202MA 2BL2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Matching Parameters:

• Off-state voltage rating: 600V (exact match required)
• Gate trigger voltage (Vgt): 800mV maximum (exact match required)
• Operating temperature range: -40°C to 125°C (exact match required)
• Package type: TO-92-3 through-hole configuration (exact match required)
• SCR type: Sensitive Gate (exact match required)

Secondary Compatibility Parameters:

• Current - On State (It RMS): 800mA or higher acceptable
• Current - Gate Trigger (Igt): Values ≤50µA acceptable; higher values indicate different gate sensitivity
• Voltage - On State (Vtm): Variations within ±0.25V acceptable for most applications
• Current - Hold (Ih): 5mA or lower acceptable

Packaging Variants: Substitutes are grouped by packaging format (Bulk vs. Cut Tape) but remain electrically interchangeable. Cut Tape variants with formed leads are mechanically compatible with standard through-hole PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and full RoHS3 compliance, meeting regulatory requirements equivalent to the S6X8ES2. Selection among substitutes depends on application-specific current requirements and packaging logistics:

For 800mA RMS applications: P0111MA 1AA3, X00602MA 1AA2, X00602MA 5AL2, and X00619MA5AL2 are direct electrical equivalents. P0111MA 1AA3 features the lowest gate trigger current (25µA), providing enhanced gate sensitivity. X00602MA variants offer lower on-state voltage (1.35V) and superior off-state leakage characteristics (1µA), reducing power dissipation in low-current hold states.

For applications requiring higher current capacity: X0202MA 1BA2 and X0202MA 2BL2 support 1.25A RMS on-state current while maintaining identical voltage ratings and gate characteristics, providing design margin for future current scaling.

For packaging format: Bulk packaging (P0111MA 1AA3, X00602MA 1AA2, X0202MA 1BA2) suits high-volume production. Cut Tape variants (X00602MA 5AL2, X00619MA5AL2, X0202MA 2BL2) with formed leads accommodate automated assembly processes and tape-and-reel handling.

Frequently Asked Questions (FAQ)

Q: Can X0202MA parts (1.25A rated) replace S6X8ES2 (800mA rated) in existing designs?

A: Yes. X0202MA 1BA2 and X0202MA 2BL2 are electrically compatible substitutes with identical voltage and gate ratings. The higher current rating (1.25A RMS vs. 800mA RMS) provides additional design margin without affecting circuit operation at 800mA or below. No circuit modifications are required.

Q: What is the difference between P0111MA 1AA3 and X00602MA variants?

A: Both are 800mA RMS rated and electrically compatible. P0111MA 1AA3 has lower gate trigger current (25µA vs. 200µA), making it more sensitive to gate signals. X00602MA variants feature lower on-state voltage drop (1.35V vs. 1.95V), reducing power dissipation. Selection depends on gate drive circuit capability and thermal budget.

Q: Are Cut Tape (CT) packaged parts mechanically compatible with through-hole PCB layouts?

A: Yes. X00602MA 5AL2, X00619MA5AL2, and X0202MA 2BL2 are supplied in Cut Tape format with formed leads. The TO-92-3 package geometry and lead spacing remain identical to Bulk variants, ensuring direct mechanical compatibility with standard through-hole PCB designs.

Q: Do all substitutes meet the same compliance standards as S6X8ES2?

A: Yes. All listed substitutes are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS coding (8541.30.0080), matching the regulatory profile of the S6X8ES2.

Q: What is the significance of Current - Gate Trigger (Igt) variation among substitutes?

A: Igt determines the minimum gate current required to trigger the SCR. S6X8ES2 specifies 50µA maximum; P0111MA 1AA3 specifies 25µA (more sensitive), while X00602MA and X0202MA variants specify 200µA (less sensitive). Lower Igt values reduce gate drive power requirements. Higher Igt values require stronger gate drive circuits but provide better noise immunity. Selection depends on gate drive circuit design.

Q: Can substitutes be mixed within a single assembly?

A: Yes, provided the application does not require matched gate characteristics across multiple SCRs. For applications requiring synchronized gate triggering or matched thermal behavior, use parts from the same manufacturer and base product number (e.g., all X00602MA variants or all X0202MA variants).