PS2561D-1Y-V-W-A Equivalent & Substitute Parts

Part Overview

The PS2561D-1Y-V-W-A is a 5000Vrms optoisolator with transistor output in a 4-DIP package manufactured by CEL under the NEPOC series. This component provides galvanic isolation for DC input signals with single-channel transistor output capability. The part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

PS2561D-1Y-V-W-A

CELIn Stock: 1001PS2561D-1Y-V-W-A Datasheet

Current PartRFQ

LTV-816

Lite-On Inc.In Stock: 45423LTV-816 Datasheet

SimilarRFQ

PS2561D-1Y-W-A

Renesas Electronics CorporationIn Stock: 14683PS2561D-1Y-W-A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PS2561D-1Y-V-W-A are identified based on strict electrical and mechanical parameter matching within the optoisolator transistor output category. The substitution criteria are:

Critical Matching Parameters:

• Voltage - Isolation: 5000Vrms
• Number of Channels: 1
• Output Type: Transistor
• Package / Case: 4-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Allowable Parameter Ranges for Substitution:

• Current Transfer Ratio: Minimum 50% @ 5mA (lower bound acceptable for design margin)
• Voltage - Output (Max): 80V or greater
• Current - Output / Channel: 50mA or greater
• Operating Temperature: Must encompass or match the required range
• Vce Saturation (Max): 300mV or lower (lower values acceptable)

Substitutes are grouped into two categories: parametric equivalents (identical electrical specifications) and functional equivalents (compatible within allowable parameter ranges).

Parameter Comparison

Engineering Selection Recommendations

PS2561D-1Y-W-A (Renesas Electronics Corporation) is the primary parametric equivalent. This part maintains identical electrical specifications including Current Transfer Ratio (130%-260% @ 5mA), Vce Saturation (300mV max), and operating temperature range (-55°C ~ 110°C). The part is currently active in production with substantial inventory availability (14659 units). Both the original CEL part and this Renesas equivalent carry ROHS3 compliance and REACH Affected status, ensuring regulatory alignment for existing designs.

LTV-816 (Lite-On Inc.) is a functional equivalent suitable for applications where the lower minimum Current Transfer Ratio (50% @ 5mA) and improved Vce Saturation (200mV max) provide design advantages. This part offers the widest inventory availability (45400 units) and carries REACH Unaffected status. The operating temperature range (-30°C ~ 110°C) is narrower at the lower bound; applications requiring operation below -30°C must use PS2561D-1Y-W-A. The LTV-816 demonstrates superior saturation characteristics and higher maximum forward current (50mA vs 40mA), making it suitable for higher-current input applications.

Selection between PS2561D-1Y-W-A and LTV-816 depends on operating temperature requirements and input current specifications. Both parts are ROHS3 compliant and suitable for direct PCB substitution in 4-DIP through-hole footprints.

Frequently Asked Questions (FAQ)

Q: Can LTV-816 replace PS2561D-1Y-V-W-A in all applications?

A: LTV-816 is compatible for applications operating within -30°C to 110°C. Applications requiring operation below -30°C must use PS2561D-1Y-W-A, which supports -55°C to 110°C. All other electrical parameters are compatible.

Q: What is the difference between PS2561D-1Y-V-W-A and PS2561D-1Y-W-A?

A: Both parts are from the NEPOC series with identical electrical specifications. PS2561D-1Y-W-A is the active production equivalent manufactured by Renesas Electronics Corporation. The original PS2561D-1Y-V-W-A (CEL) is discontinued at DiGi Electronics.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 4-DIP (0.300", 7.62mm) package with identical through-hole mounting specifications. Direct PCB substitution is possible without layout modifications.

Q: What is the significance of Current Transfer Ratio differences?

A: Current Transfer Ratio indicates the ratio of output collector current to input LED current. PS2561D-1Y-W-A and PS2561D-1Y-V-W-A specify 130%-260% @ 5mA. LTV-816 specifies 50%-600% @ 5mA. The wider range in LTV-816 reflects manufacturing tolerance; minimum value of 50% is acceptable for designs with adequate input current margin.

Q: Does REACH status affect part selection?

A: REACH Affected status (PS2561D-1Y-V-W-A and PS2561D-1Y-W-A) indicates the part contains substances of concern but is compliant with REACH regulations. LTV-816 carries REACH Unaffected status. For applications with strict substance restrictions, LTV-816 is preferred. Both statuses are acceptable for standard industrial applications.

Q: What is the advantage of LTV-816's lower Vce Saturation?

A: Lower Vce Saturation (200mV vs 300mV) reduces power dissipation in the output transistor, resulting in lower heat generation and improved efficiency in high-frequency switching applications.

Q: Can these parts be used interchangeably on existing PCBs?

A: Yes, all three parts are mechanically and electrically compatible for through-hole 4-DIP footprints. No PCB modifications are required for substitution.