PS2801-4-A Equivalent & Substitute Parts

Part Overview

The PS2801-4-A is a 4-channel optoisolator with transistor output manufactured by CEL, rated for 2500Vrms isolation voltage. This component is designed for applications requiring galvanic isolation between input and output circuits with DC input control and transistor switching output. The PS2801-4-A is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications.

Substiute Parts

PS2801-4-A

CELIn Stock: 1190PS2801-4-A Datasheet

Current PartRFQ

PS2801-4-F3-A

Renesas Electronics CorporationIn Stock: 27710PS2801-4-F3-A Datasheet

DirectRFQ

PS2801-4-A

Renesas Electronics CorporationIn Stock: 15550PS2801-4-A Datasheet

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TCMT1106

Vishay Semiconductor Opto DivisionIn Stock: 4173TCMT1106 Datasheet

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TLP291-4(GB,E)

Toshiba Semiconductor and StorageIn Stock: 1000131TLP291-4(GB,E) Datasheet

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TLP291-4(GB-TP,E)

Toshiba Semiconductor and StorageIn Stock: 3237TLP291-4(GB-TP,E) Datasheet

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TLP291-4(TP,E)

Toshiba Semiconductor and StorageIn Stock: 3369TLP291-4(TP,E) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS2801-4-A is determined by the following critical parameters:

Primary Substitution Criteria:

• Number of Channels: 4 channels required
• Voltage - Isolation: 2500Vrms minimum
• Output Type: Transistor output
• Current - Output / Channel: 50mA minimum
• Voltage - Output (Max): 80V minimum
• Package compatibility: 16-pin SOIC form factor

Secondary Compatibility Parameters:

• Current Transfer Ratio range must encompass application requirements
• Operating temperature range must cover -55°C to 100°C minimum
• RoHS3 compliance and MSL Level 1 preferred for supply chain consistency

Substitute parts are grouped into two categories:

Direct Equivalents (Same Manufacturer - Renesas): Parts PS2801-4-F3-A and PS2801-4-A (Renesas variant) maintain identical electrical specifications and base product lineage, differing only in packaging format and product lifecycle status.

Functional Equivalents (Alternative Manufacturers): Toshiba TLP291-4 series variants meet all critical electrical parameters with 2500Vrms isolation, 4-channel configuration, and transistor output. These parts demonstrate superior performance in switching speed and are in active production status.

Limited Compatibility: TCMT1106 (Vishay) is a single-channel device and does not meet the 4-channel requirement, therefore not suitable as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

For Existing Designs (Maintenance & Repair):

PS2801-4-F3-A and PS2801-4-A (Renesas variant) provide direct electrical and mechanical compatibility with the original PS2801-4-A. Both are manufactured by Renesas Electronics Corporation and maintain identical specifications. PS2801-4-F3-A is available in Cut Tape & Digi-Reel packaging with 27,700 units in stock. PS2801-4-A (Renesas) is available in Strip packaging with 15,497 units in stock. Both carry ROHS3 compliance and MSL Level 1 rating.

For New Designs:

TLP291-4 series optoisolators from Toshiba Semiconductor and Storage are recommended as primary alternatives. All three variants—TLP291-4(GB,E), TLP291-4(GB-TP,E), and TLP291-4(TP,E)—are in active production status and meet all critical electrical parameters. These parts demonstrate superior switching performance with turn-on/turn-off times of 3µs and rise/fall times of 2µs/3µs, compared to the PS2801-4-A specifications of 6µs/5µs and 3µs/5µs respectively. Extended operating temperature range to 110°C provides additional thermal margin. All variants are ROHS3 compliant with MSL Level 1 rating.

Package Consideration:

Toshiba TLP291-4 variants feature 16-SOIC packaging with 0.179" width (4.55mm) compared to PS2801-4-A 0.173" width (4.40mm). This minor dimensional difference requires PCB layout verification for footprint compatibility, though both are standard 16-pin SOIC form factors with identical pin pitch.

Inventory Availability:

TLP291-4(GB,E) offers highest inventory availability with 1,000,100 units in stock. TLP291-4(GB-TP,E) and TLP291-4(TP,E) provide 3,200 and 3,300 units respectively in Cut Tape & Digi-Reel format for automated assembly.

Frequently Asked Questions (FAQ)

Q: Can TLP291-4 variants directly replace PS2801-4-A without circuit modification?

A: TLP291-4 variants meet all critical electrical specifications: 4-channel configuration, 2500Vrms isolation, transistor output, 80V maximum output voltage, and 50mA per-channel current rating. However, minor differences exist: Vce saturation is 400mV (TLP291-4) versus 300mV (PS2801-4-A), and forward voltage is 1.2V versus 1.1V. These differences are within typical circuit design margins for optoisolator applications. PCB footprint verification is required due to package width variation (0.179" vs 0.173").

Q: What is the difference between TLP291-4(GB,E), TLP291-4(GB-TP,E), and TLP291-4(TP,E)?

A: All three variants are electrically identical 4-channel 2500Vrms optoisolators with transistor output. The designations indicate packaging format: (GB,E) is supplied in Tube packaging; (GB-TP,E) and (TP,E) are supplied in Cut Tape & Digi-Reel format for automated assembly. TLP291-4(TP,E) specifies minimum current transfer ratio of 50% @ 5mA, while (GB,E) and (GB-TP,E) specify 100% minimum. Selection depends on assembly process requirements and inventory needs.

Q: Why is TCMT1106 not suitable as a substitute?

A: TCMT1106 is a single-channel optoisolator, while PS2801-4-A requires 4-channel functionality. Although TCMT1106 offers higher isolation voltage (3750Vrms) and active product status, the channel count mismatch makes it unsuitable for direct substitution. Applications requiring single-channel isolation may evaluate TCMT1106 independently.

Q: Are Renesas PS2801-4-F3-A and PS2801-4-A (Renesas) interchangeable?

A: Yes, both Renesas variants are electrically and mechanically identical to the original CEL PS2801-4-A. Differences are limited to packaging format (Cut Tape & Digi-Reel versus Strip) and product lifecycle status (both marked "Not For New Designs"). Selection between these variants depends on assembly equipment compatibility and inventory availability.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts listed—PS2801-4-F3-A, PS2801-4-A (Renesas), and TLP291-4 series—are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating. Renesas variants carry REACH Affected or REACH Unaffected status; Toshiba variants are REACH Unaffected. All parts are classified under ECCN EAR99 and HTSUS 8541.49.8000.

Q: How do switching speed differences affect circuit performance?

A: PS2801-4-A specifies 6µs turn-on and 5µs turn-off time with 3µs/5µs rise/fall times. TLP291-4 variants specify 3µs turn-on and turn-off time with 2µs/3µs rise/fall times. TLP291-4 demonstrates approximately 50% faster switching response. For applications with timing-critical control signals or high-frequency switching requirements, faster TLP291-4 response may improve system performance. For standard DC switching applications, both meet functional requirements.