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

Part Overview

The PS2711-1-K-A is a high-voltage isolation optoisolator manufactured by CEL, designed for applications requiring 3750Vrms galvanic isolation with transistor output configuration. This component features a single-channel design in a 4-SMD surface mount package and operates across an industrial temperature range of -55°C to 100°C.

The PS2711-1-K-A has been discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing system designs and maintenance applications. Substitute components must maintain compatibility with the isolation voltage, output characteristics, and physical package specifications to ensure direct replacement capability.

Substiute Parts

PS2711-1-K-A

CELIn Stock: 877PS2711-1-K-A Datasheet

Current PartRFQ

LTV-357T

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS2711-1-K-A optoisolator is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Isolation voltage: 3750Vrms minimum
• Output configuration: Transistor output
• Number of channels: Single channel (1)
• Package type: 4-SMD, Gull Wing surface mount
• Input type: DC
• Regulatory compliance: ROHS3 Compliant

Allowable Parameter Variations: Substitute parts may differ in the following specifications provided they do not degrade system performance:

• Current Transfer Ratio (CTR) range
• Rise and fall time characteristics
• Maximum output voltage (if equal to or greater than 40V)
• Maximum output current (if equal to or greater than 40mA)
• Vce saturation voltage (if equal to or lower than 300mV)
• Operating temperature upper limit (if equal to or greater than 100°C)
• Forward voltage characteristics

The LTV-357T from Lite-On Inc. meets all mandatory matching criteria and qualifies as a direct substitute for the PS2711-1-K-A.

Parameter Comparison

Engineering Selection Recommendations

PS2711-1-K-A (CEL) — Discontinued

The PS2711-1-K-A is no longer available through primary distribution channels. This component is ROHS3 compliant and REACH affected. Existing inventory is limited to 865 pieces in new original condition.

LTV-357T (Lite-On Inc.) — Recommended Substitute

The LTV-357T is an active product with 10,099 pieces in new original inventory. This component provides direct functional equivalence to the PS2711-1-K-A across all critical isolation and output parameters. The LTV-357T is ROHS3 compliant and REACH unaffected, offering improved regulatory status for new designs.

Key advantages of the LTV-357T include:

• Higher maximum output current (50mA vs. 40mA)
• Lower Vce saturation voltage (200mV vs. 300mV), indicating improved switching efficiency
• Extended operating temperature range (-55°C to 110°C vs. -55°C to 100°C)
• Faster fall time (3µs vs. 5µs)
• Active product status with robust supply availability

The LTV-357T operates at a maximum output voltage of 35V, which is 5V lower than the PS2711-1-K-A specification. Applications requiring output voltages above 35V must be evaluated for compatibility.

Frequently Asked Questions (FAQ)

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

A: The LTV-357T is a direct substitute for the PS2711-1-K-A in applications where the maximum output voltage requirement does not exceed 35V. Both components share identical isolation voltage (3750Vrms), single-channel transistor output configuration, and 4-SMD gull wing package specifications. The LTV-357T provides superior performance in output current capacity and saturation voltage characteristics.

Q: What is the significance of the 5V difference in maximum output voltage between these components?

A: The PS2711-1-K-A supports 40V maximum output voltage, while the LTV-357T supports 35V maximum output voltage. This difference must be evaluated against the actual operating voltage in the application circuit. If the design operates at or below 35V, the LTV-357T is fully compatible. If the design requires operation above 35V, alternative components must be identified.

Q: Are there package or mounting differences between these optoisolators?

A: Both the PS2711-1-K-A and LTV-357T use identical 4-SMD gull wing surface mount packages. No PCB layout modifications or reflow profile adjustments are required for substitution. Both components have MSL rating of 1 (unlimited moisture sensitivity), indicating identical handling and storage requirements.

Q: How do the Current Transfer Ratio specifications differ?

A: The PS2711-1-K-A specifies 200% to 400% CTR at 1mA input current, while the LTV-357T specifies 50% to 600% CTR at 5mA input current. These measurements are taken at different input current levels, making direct comparison inappropriate. Circuit designs must account for the actual input current used in the application to determine effective CTR performance.

Q: What is the regulatory compliance status of each component?

A: Both components are ROHS3 compliant. The PS2711-1-K-A is REACH affected, while the LTV-357T is REACH unaffected. For applications subject to REACH restrictions, the LTV-357T provides improved regulatory alignment. Both components carry EAR99 ECCN classification and 8541.49.8000 HTSUS code.

Q: Is the extended temperature range of the LTV-357T (-55°C to 110°C) significant?

A: The LTV-357T supports operation to 110°C, compared to 100°C for the PS2711-1-K-A. This 10°C extension provides additional thermal margin in high-temperature applications. For designs operating within the -55°C to 100°C range, both components are equivalent in this parameter.