PS2561DL-1Y-V-L-A Optoisolator - Equivalent & Substitute Parts

Part Overview

The PS2561DL-1Y-V-L-A is a 5000Vrms optoisolator with transistor output, manufactured by CEL in a 4-SMD surface mount package. This component has been discontinued at DiGi Electronics, necessitating the identification of equivalent substitute parts to maintain design compatibility and ensure supply chain continuity. The part belongs to the NEPOC series and provides single-channel isolation for DC input applications.

Substiute Parts

PS2561DL-1Y-V-L-A

CELIn Stock: 1155PS2561DL-1Y-V-L-A Datasheet

Current PartRFQ

LTV-816S

Lite-On Inc.In Stock: 1997LTV-816S Datasheet

SimilarRFQ

LTV-816S-TA1

Lite-On Inc.In Stock: 6388LTV-816S-TA1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS2561DL-1Y-V-L-A is based on strict equivalence of critical electrical and mechanical parameters. The following criteria determine valid substitutes:

Isolation Voltage: All substitutes must maintain 5000Vrms isolation capability.

Package Configuration: Substitutes must use identical 4-SMD, Gull Wing surface mount packaging to ensure PCB compatibility without layout modifications.

Channel Count: Single-channel configuration is required.

Output Stage: Transistor output type is mandatory for circuit compatibility.

Input Type: DC input specification must be preserved.

Operating Temperature Range: Substitute temperature ranges must cover or exceed the -55°C to 110°C operating window.

Current Transfer Ratio: Substitutes must support the required drive current and response characteristics. The PS2561DL-1Y-V-L-A specifies 200% minimum CTR at 5mA; equivalent parts may have lower or higher minimum specifications provided they operate within acceptable circuit constraints.

Output Voltage and Current: Maximum output voltage of 80V and output current of 50mA per channel establish the load-handling capability threshold.

RoHS and Regulatory Compliance: Substitutes must maintain ROHS3 compliance for new designs in regulated markets.

Parameter Comparison

Engineering Selection Recommendations

The LTV-816S and LTV-816S-TA1 (both from Lite-On Inc.) are electrically and mechanically equivalent to the PS2561DL-1Y-V-L-A across all critical functional parameters. Both substitute parts maintain the 5000Vrms isolation voltage, identical package configuration, and DC transistor output architecture.

LTV-816S is supplied in Tube packaging and maintains active product status with 1900 units in stock.

LTV-816S-TA1 is supplied in Tape & Reel (TR) format with higher inventory availability (6300 units) and active product status. The TR packaging is suitable for automated assembly processes.

Both LTV-816 series alternatives are ROHS3 compliant and maintain the same regulatory framework. The primary differences between the discontinued PS2561DL-1Y-V-L-A and the LTV-816 equivalents are manufacturing source, operating temperature floor (-50°C vs -55°C minimum), Vce saturation specification (200mV vs 300mV maximum), and current transfer ratio distribution. These differences remain within acceptable substitution parameters for applications designed for the original part.

Frequently Asked Questions (FAQ)

Q: Can the LTV-816S or LTV-816S-TA1 directly replace the PS2561DL-1Y-V-L-A without circuit modification? A: Yes. Both substitute parts maintain electrical equivalence in isolation voltage, output stage configuration, maximum output voltage and current, input type, and package footprint. The identical 4-SMD, Gull Wing package enables direct board-level substitution.

Q: What is the difference between LTV-816S and LTV-816S-TA1? A: The primary difference is packaging format. LTV-816S is supplied in Tube packaging for manual handling and low-volume applications. LTV-816S-TA1 is supplied in Tape & Reel (TR) format for automated pick-and-place assembly. Both parts are electrically identical and share the same base product number (LTV-816).

Q: Does the operating temperature range difference (-50°C to 110°C vs -55°C to 110°C) affect substitution? A: The LTV-816 series has a -50°C minimum operating temperature compared to the PS2561DL-1Y-V-L-A at -55°C. Applications operating only at temperatures above -50°C encounter no functional impact. Applications requiring operation below -50°C must be assessed for temperature-dependent performance.

Q: How do the Current Transfer Ratio specifications differ between these parts? A: The PS2561DL-1Y-V-L-A specifies 200% minimum CTR at 5mA; the LTV-816 series specifies 50% minimum at the same condition. The LTV-816 series maintains a higher maximum CTR of 600% versus 400% for the PS2561DL-1Y-V-L-A. In practical circuit design, the lower minimum CTR of the substitute part requires verification that drive current margins remain adequate for the application.

Q: Are both substitute parts compliant with RoHS and REACH regulations? A: Both LTV-816S and LTV-816S-TA1 maintain ROHS3 compliance. The original PS2561DL-1Y-V-L-A is REACH Affected; the LTV-816 substitutes are REACH Unaffected. This regulatory difference is advantageous for supply chain management and restricted substance compliance.

Q: Which packaging format should be selected for new production designs? A: LTV-816S-TA1 (Tape & Reel) is specified for new designs utilizing automated assembly processes. LTV-816S (Tube) is suitable for manual assembly, prototype work, or low-volume manufacturing scenarios.