PS2581AL2-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2581AL2-A is a 5000Vrms isolation optoisolator with transistor output, designed for single-channel signal isolation applications. Manufactured by CEL in a 4-SMD surface mount package, this component provides galvanic isolation with a current transfer ratio range of 50% to 400% at 5mA input current.

The PS2581AL2-A has been discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

PS2581AL2-A

CELIn Stock: 1132PS2581AL2-A Datasheet

Current PartRFQ

PS2561AL-1-A

Renesas Electronics CorporationIn Stock: 1413PS2561AL-1-A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PS2581AL2-A are identified based on strict electrical and mechanical parameter matching within the optoisolator category. The substitution criteria are:

Critical Parameters for Substitution:

• Voltage - Isolation: 5000Vrms
• Number of Channels: 1
• Output Type: Transistor
• Current Transfer Ratio range: 50% to 400% @ 5mA
• Voltage - Output (Max): 70V
• Current - Output / Channel: 30mA
• Vce Saturation (Max): 300mV
• Rise / Fall Time: 3µs, 5µs
• Operating Temperature: -55°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 4-SMD, Gull Wing

Parts meeting all these parameters are classified as direct parametric equivalents and may be used as substitutes in applications where the PS2581AL2-A was originally specified.

Parameter Comparison

Engineering Selection Recommendations

The PS2561AL-1-A (Renesas Electronics Corporation) is a parametric equivalent substitute for the PS2581AL2-A. All electrical and mechanical parameters are identical, including isolation voltage, channel configuration, current transfer ratio, output characteristics, and operating temperature range.

Both parts comply with ROHS3 and REACH requirements, share identical ECCN and HTSUS classifications, and feature MSL Level 1 moisture sensitivity ratings.

The PS2561AL-1-A is supplied in Tube packaging, whereas the PS2581AL2-A packaging specification was not provided. Both components use identical 4-SMD Gull Wing surface mount packages.

The PS2581AL2-A is discontinued at DiGi Electronics. The PS2561AL-1-A carries a "Not For New Designs" status, indicating it is available for existing production but not recommended for new design implementations. Current inventory availability is 1396 pieces for the PS2561AL-1-A compared to 1033 pieces for the PS2581AL2-A.

Frequently Asked Questions (FAQ)

Q: Can the PS2561AL-1-A directly replace the PS2581AL2-A in existing designs?

A: Yes. The PS2561AL-1-A meets all electrical and mechanical parameters specified for the PS2581AL2-A, including 5000Vrms isolation voltage, 1-channel transistor output, 50-400% current transfer ratio, 70V maximum output voltage, 30mA output current, and 4-SMD Gull Wing surface mount package. Both components operate across the identical temperature range of -55°C to 100°C.

Q: What are the key parameters that define substitution eligibility?

A: Substitution eligibility is determined by matching: isolation voltage (5000Vrms), number of channels (1), output type (transistor), current transfer ratio range (50-400% @ 5mA), maximum output voltage (70V), output current per channel (30mA), Vce saturation (300mV maximum), rise/fall time (3µs, 5µs), operating temperature range (-55°C to 100°C), mounting type (surface mount), and package configuration (4-SMD Gull Wing).

Q: Are there packaging differences between these parts?

A: The PS2561AL-1-A is supplied in Tube packaging. The PS2581AL2-A packaging specification was not provided in the available documentation. Both components use identical 4-SMD Gull Wing surface mount package configurations suitable for automated assembly processes.

Q: What is the compliance status of the substitute part?

A: The PS2561AL-1-A is ROHS3 compliant, REACH affected, and classified under ECCN EAR99 and HTSUS 8541.49.8000, matching the PS2581AL2-A exactly. Moisture sensitivity level is MSL 1 (Unlimited) for both parts.

Q: Why is the PS2561AL-1-A marked "Not For New Designs"?

A: The "Not For New Designs" status indicates the part is available for existing production support and maintenance applications but is not recommended for incorporation into new product designs. This status is independent of its parametric equivalence to the PS2581AL2-A.