PS2561L1-1-A Optoisolator: Equivalent & Substitute Parts

Part Overview

The PS2561L1-1-A is a 5000Vrms isolated optoisolator with transistor output, configured as a single-channel 4-DIP package component. This device provides galvanic isolation for signal transmission in high-voltage environments, featuring a current transfer ratio of 80–400% at 5mA input current and maximum output current of 50mA per channel.

The PS2561L1-1-A is listed as discontinued at DiGi Electronics. Identifying equivalent and substitute parts ensures design continuity and procurement flexibility when the primary part reaches end-of-life status.

Substiute Parts

PS2561L1-1-A

CELIn Stock: 1703PS2561L1-1-A Datasheet

Current PartRFQ

PS2561L1-1-A

Renesas Electronics CorporationIn Stock: 1702PS2561L1-1-A Datasheet

Parametric EquivalentRFQ

PS2581L1-A

Renesas Electronics CorporationIn Stock: 2828PS2581L1-A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PS2561L1-1-A must meet the following mandatory electrical and mechanical compatibility criteria:

• Isolation Voltage: Exact match at 5000Vrms
• Number of Channels: Single channel (1)
• Output Configuration: Transistor output type
• Current Transfer Ratio Range: 80% minimum and 400% maximum at 5mA input
• Maximum Output Current: 50mA per channel
• Maximum Output Voltage: 80V
• Package Type: 4-DIP form factor with 0.400" (10.16mm) pitch
• Mounting Technology: Through-hole compatible

The PS2561L1-1-A substitutes are sourced from Renesas Electronics Corporation, maintaining electrical equivalence while offering different base product series designations (PS2561 and PS2581).

Parameter Comparison

Engineering Selection Recommendations

All three components—PS2561L1-1-A (CEL), PS2561L1-1-A (Renesas), and PS2581L1-A (Renesas)—are functionally and electrically equivalent. Selection should prioritize the following factors:

Product Status and Lifecycle: The CEL PS2561L1-1-A is discontinued at DiGi Electronics, making it unsuitable for new designs or long-term procurement plans. Both Renesas variants carry "Not For New Designs" status, indicating both are legacy components. Selection between any of these three should be restricted to repair, maintenance, or continuation of existing production runs where component qualification has already been completed.

Compliance and Environmental Standards: All three parts meet ROHS3 compliance and carry identical electrical ratings. Selection between them does not introduce compliance risk.

Inventory Availability: The PS2581L1-A offers higher available inventory (2740 units) compared to the PS2561L1-1-A variants (1692 units each), which may be relevant for procurement planning on legacy production runs.

Package and Form Factor Compatibility: All three parts use identical 4-DIP through-hole packaging, ensuring mechanical and electrical compatibility in existing PCB designs without layout modifications.

Frequently Asked Questions (FAQ)

Q: Are PS2561L1-1-A (CEL) and PS2561L1-1-A (Renesas) true equivalents?

A: Yes. Both components are parametrically identical across all provided electrical and mechanical specifications. The difference lies solely in manufacturer assignment, with Renesas Electronics Corporation listed as the source for the equivalent version. Both are legacy products.

Q: Can PS2581L1-A substitute for PS2561L1-1-A in an existing design?

A: Yes. The PS2581L1-A meets all electrical and mechanical requirements for direct substitution. The components differ only in base product series (PS2581 versus PS2561). Both exhibit identical isolation voltage (5000Vrms), current transfer ratio specifications, output current ratings, and packaging. No circuit modifications are required for substitution.

Q: What constraints apply to selecting among these three components?

A: Product status is the primary constraint. All three components are legacy or discontinued, making them unsuitable for new product designs. Component selection should be limited to applications where the original part has been fully qualified and where procurement of replacement units is required for existing systems. For new designs, evaluation of current-generation optoisolators with equivalent electrical specifications is recommended.

Q: Does packaging differ between the three components?

A: No. All three components use identical 4-DIP through-hole packaging with 0.400" (10.16mm) pitch. PCB layout and mechanical mounting are interchangeable without modification.

Q: Are all components RoHS compliant?

A: Yes. All three components meet ROHS3 compliance standards. Environmental and hazardous substance restrictions do not differ between the three parts.