S4X8ES1RP Equivalent & Substitute Parts

Part Overview

The S4X8ES1RP is a sensitive gate SCR (silicon controlled rectifier) rated for 400 V off-state voltage and 800 mA RMS on-state current, manufactured by Littelfuse Inc. in TO-92 through-hole packaging. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are necessary when the original part becomes unavailable, when alternative packaging formats are required, or when sourcing from different manufacturers is preferred while maintaining electrical and mechanical compatibility.

Substiute Parts

S4X8ES1RP

Littelfuse Inc.In Stock: 1123S4X8ES1RP Datasheet

Current PartRFQ

P0102DA 1AA3

STMicroelectronicsIn Stock: 4916P0102DA 1AA3 Datasheet

MFR RecommendedRFQ

P0102DA 2AL3

STMicroelectronicsIn Stock: 10177P0102DA 2AL3 Datasheet

MFR RecommendedRFQ

P0102DA 5AL3

STMicroelectronicsIn Stock: 35332P0102DA 5AL3 Datasheet

MFR RecommendedRFQ

P0109DA 5AL3

STMicroelectronicsIn Stock: 3609P0109DA 5AL3 Datasheet

MFR RecommendedRFQ

P0118DA 5AL3

STMicroelectronicsIn Stock: 2465P0118DA 5AL3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S4X8ES1RP is determined by strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

• Voltage - Off State: 400 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)
• Package / Case: TO-92-3 (exact match required)
• SCR Type: Sensitive Gate (exact match required)
• Operating Temperature Range: -40°C to 125°C (exact match required)

Secondary Compatibility Parameters:

• Voltage - On State (Vtm) Max: Substitute parts rated at 1.95 V are acceptable (higher than 1.7 V specification)
• Current - Gate Trigger (Igt) Max: Substitute parts rated at 200 µA are acceptable (higher than 5 µA specification)
• Current - Off State Max: Substitute parts rated at 10 µA are acceptable (higher than 3 µA specification)
• Current - Non Rep. Surge: Substitute parts rated at 7A/8A are acceptable (lower than 8A/10A specification)

All substitute parts are manufactured by STMicroelectronics and maintain ROHS3 compliance and REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

All STMicroelectronics substitute parts (P0102DA 1AA3, P0102DA 2AL3, P0102DA 5AL3, and P0109DA 5AL3) are electrically and mechanically compatible with the S4X8ES1RP and maintain Active product status with ROHS3 compliance and REACH unaffected certification.

P0102DA 5AL3 offers the highest inventory availability (35,300 pcs) and is supplied in Cut Tape format, suitable for automated assembly processes.

P0102DA 2AL3 provides 10,100 pcs in stock with Cut Tape packaging, offering a balance between availability and packaging format.

P0102DA 1AA3 is available in Bulk packaging (4,848 pcs) and is suitable for manual assembly or lower-volume applications.

P0109DA 5AL3 is available in Cut Tape format with 3,567 pcs in stock and serves as an alternative within the P0109 base product line.

P0118DA 5AL3 is classified as Obsolete product status and should not be selected for new designs or long-term production applications, despite electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can P0102DA series parts directly replace the S4X8ES1RP in existing designs?

A: Yes. The P0102DA 1AA3, P0102DA 2AL3, and P0102DA 5AL3 are electrically and mechanically equivalent to the S4X8ES1RP. All three share identical off-state voltage (400 V), gate trigger voltage (800 mV), on-state RMS current (800 mA), operating temperature range (-40°C to 125°C), and TO-92-3 package configuration. The primary differences are packaging format (Bulk or Cut Tape versus Tape & Reel) and gate trigger current specification (200 µA versus 5 µA), which does not affect functional compatibility.

Q: What is the difference between P0102DA 1AA3, P0102DA 2AL3, and P0102DA 5AL3?

A: These three parts are electrically identical. The differences are in packaging format and inventory availability. P0102DA 1AA3 is supplied in Bulk format, P0102DA 2AL3 and P0102DA 5AL3 are supplied in Cut Tape format. P0102DA 5AL3 has the highest inventory level (35,300 pcs), followed by P0102DA 2AL3 (10,100 pcs) and P0102DA 1AA3 (4,848 pcs).

Q: Why does P0102DA have a higher gate trigger current specification (200 µA) compared to S4X8ES1RP (5 µA)?

A: The P0102DA series is rated for a maximum gate trigger current of 200 µA, which is higher than the S4X8ES1RP specification of 5 µA. This difference does not prevent substitution because the P0102DA will function correctly in circuits designed for the S4X8ES1RP. The gate trigger current specification defines the maximum current at which the gate will trigger the SCR; a higher rating indicates broader triggering capability and does not compromise compatibility.

Q: Is P0109DA 5AL3 a suitable substitute?

A: Yes. P0109DA 5AL3 meets all primary substitution criteria with identical electrical specifications and TO-92-3 packaging. It is available in Cut Tape format with 3,567 pcs in stock and maintains Active product status with ROHS3 compliance.

Q: Should P0118DA 5AL3 be used as a substitute?

A: P0118DA 5AL3 is classified as Obsolete product status and should not be selected for new designs or applications requiring long-term component availability. Although it is electrically compatible with the S4X8ES1RP, its obsolete status presents supply chain risk.

Q: What packaging format should I select?

A: Packaging format selection depends on assembly method. Cut Tape (CT) format is suitable for automated pick-and-place assembly. Bulk format is suitable for manual assembly or lower-volume applications. Tape & Reel (TR) format, used by the original S4X8ES1RP, is optimized for high-volume automated production. All formats contain electrically identical components.