PS2711-1-L-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2711-1-L-A is a high-voltage isolation optoisolator manufactured by CEL, designed for applications requiring 3750Vrms galvanic isolation with transistor output configuration. This component features single-channel isolation in a 4-SOP surface mount package and is classified as discontinued at DiGi Electronics. Due to its discontinued status, identifying functionally equivalent substitute components is essential for design continuity, production planning, and long-term supply chain management.

Substiute Parts

PS2711-1-L-A

CELIn Stock: 769PS2711-1-L-A Datasheet

Current PartRFQ

LTV-357T

Lite-On Inc.In Stock: 10147LTV-357T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS2711-1-L-A is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - Isolation: 3750Vrms (exact match required)
• Number of Channels: 1 (single channel configuration)
• Output Type: Transistor (not photovoltaic or other types)
• Package / Case: 4-SMD, Gull Wing (physical and electrical compatibility)
• Mounting Type: Surface Mount (PCB assembly compatibility)

Allowable Parameter Variations:

• Voltage - Output (Max): Substitute must equal or exceed 40V
• Current - Output / Channel: Substitute must equal or exceed 40mA
• Current Transfer Ratio: Substitute specifications may differ within device operational range
• Vce Saturation (Max): Substitute may vary; lower values indicate improved performance
• Operating Temperature Range: Substitute must encompass or exceed -55°C ~ 100°C
• RoHS and REACH Compliance: Substitute must maintain equivalent regulatory status

Parameter Comparison

Engineering Selection Recommendations

LTV-357T (Lite-On Inc.) as Primary Substitute:

The LTV-357T qualifies as a functional substitute for the PS2711-1-L-A based on matching isolation voltage (3750Vrms), channel configuration (1 channel), output type (transistor), and package specification (4-SMD, Gull Wing). Both components maintain ROHS3 compliance and surface mount compatibility.

Critical Design Considerations:

1. Voltage - Output (Max): The LTV-357T specifies 35V maximum output voltage compared to the PS2711-1-L-A at 40V. Applications operating at or near 40V output levels require circuit validation to confirm the 35V specification is acceptable.

2. Current Transfer Ratio: The LTV-357T exhibits different current transfer ratio specifications (50% minimum @ 5mA versus 150% minimum @ 1mA for the PS2711-1-L-A). These measurements occur at different input current levels. Circuit designs dependent on specific CTR performance must be evaluated against the LTV-357T datasheet.

3. Product Status: The LTV-357T maintains active product status with 10,099 units in stock, ensuring supply availability. The PS2711-1-L-A is discontinued, making the LTV-357T the appropriate long-term component selection.

4. Regulatory Compliance: Both components maintain ROHS3 compliance. The LTV-357T is REACH Unaffected, while the PS2711-1-L-A is REACH Affected. Applications subject to REACH restrictions should confirm compatibility with the LTV-357T status.

5. Performance Improvements: The LTV-357T demonstrates lower Vce saturation (200mV versus 300mV) and faster fall time (3µs versus 5µs), indicating potential performance enhancements in switching applications.

Frequently Asked Questions (FAQ)

Q: Can the LTV-357T directly replace the PS2711-1-L-A in existing designs?

A: Direct replacement is possible for applications where the 35V maximum output voltage and different current transfer ratio specifications are acceptable. Circuit validation is required to confirm compatibility with the specific application requirements.

Q: What is the primary reason for substitution?

A: The PS2711-1-L-A is discontinued at DiGi Electronics. The LTV-357T provides equivalent isolation voltage, channel configuration, and package specification with active product status and available inventory.

Q: Are there package compatibility concerns?

A: Both components use 4-SMD, Gull Wing surface mount packages. PCB footprints and assembly processes are compatible without modification.

Q: How do the current transfer ratio specifications differ?

A: The PS2711-1-L-A specifies 150% minimum CTR at 1mA input current, while the LTV-357T specifies 50% minimum CTR at 5mA input current. These are measured at different input current levels. Application circuits must be evaluated against the specific CTR requirements and the LTV-357T datasheet.

Q: What compliance certifications apply to both components?

A: Both components are ROHS3 compliant. The LTV-357T is REACH Unaffected, while the PS2711-1-L-A is REACH Affected. Applications subject to REACH restrictions should confirm the LTV-357T status meets regulatory requirements.

Q: Does the LTV-357T offer performance advantages?

A: The LTV-357T demonstrates lower Vce saturation (200mV versus 300mV) and faster fall time (3µs versus 5µs), which may improve switching performance in certain applications. The extended operating temperature range (-55°C ~ 110°C versus -55°C ~ 100°C) provides additional thermal margin.

Q: What parameters must match exactly for substitution?

A: Isolation voltage (3750Vrms), number of channels (1), output type (transistor), and package specification (4-SMD, Gull Wing) must match exactly. Other parameters may vary within acceptable engineering tolerances based on application requirements.