PS2502L-2-E3-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2502L-2-E3-A is a 2-channel optoisolator with Darlington output manufactured by CEL, rated for 5000Vrms isolation voltage. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The PS2502L-2-E3-A operates with a minimum current transfer ratio of 200% at 1mA input and supports output currents up to 160mA per channel, suitable for industrial isolation applications requiring high voltage separation.

Substiute Parts

PS2502L-2-E3-A

CELIn Stock: 691PS2502L-2-E3-A Datasheet

Current PartRFQ

LTV-825S

Lite-On Inc.In Stock: 799LTV-825S Datasheet

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LTV-825S-TA

Lite-On Inc.In Stock: 1197LTV-825S-TA Datasheet

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LTV-825S-TA1

Lite-On Inc.In Stock: 890LTV-825S-TA1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS2502L-2-E3-A is determined by the following critical parameters that must be maintained or exceeded:

Mandatory Matching Parameters:

• Number of Channels: 2
• Voltage - Isolation: 5000Vrms
• Output Type: Darlington
• Package / Case: 8-SMD, Gull Wing
• Mounting Type: Surface Mount
• Input Type: DC

Allowable Parameter Variations:

• Current Transfer Ratio (Min): Substitute must meet or exceed 200% @ 1mA
• Voltage - Output (Max): Substitute must support minimum 40V
• Current - Output / Channel: Substitute must support minimum 160mA
• Operating Temperature: Substitute range must encompass the application requirements
• Vce Saturation (Max): Substitute must not exceed 1V

The LTV-825S, LTV-825S-TA, and LTV-825S-TA1 from Lite-On Inc. satisfy all mandatory matching parameters and maintain compatibility with the PS2502L-2-E3-A footprint and electrical interface.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The LTV-825S series optoisolators from Lite-On Inc. are direct functional equivalents for the obsolete PS2502L-2-E3-A. All three variants (LTV-825S, LTV-825S-TA, LTV-825S-TA1) maintain identical electrical specifications and package geometry, ensuring PCB-level compatibility without layout modifications.

Product Status Consideration:

The PS2502L-2-E3-A is classified as obsolete, while all LTV-825S variants are active products with confirmed inventory availability. This status difference makes the LTV-825S series the appropriate choice for new designs and ongoing production support.

Compliance and Certification:

The LTV-825S series components are ROHS3 compliant, meeting current environmental and regulatory requirements. Both the original PS2502L-2-E3-A and substitute parts share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications, confirming regulatory equivalence.

Packaging Variants:

LTV-825S-TA1 is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. LTV-825S and LTV-825S-TA are available in standard packaging configurations. Selection between variants depends on procurement and assembly requirements.

Parameter Trade-offs:

The LTV-825S series exhibits higher current transfer ratios (600% minimum, up to 7500% maximum) compared to the PS2502L-2-E3-A (200% minimum), resulting in improved switching performance. Rise and fall times are faster (60µs and 53µs respectively versus 100µs for both parameters on the original part). However, maximum output voltage is reduced from 40V to 35V, and maximum output current per channel is reduced from 160mA to 80mA. These reductions must be evaluated against specific application requirements.

Operating Temperature Range:

The LTV-825S series operates from -30°C to 100°C, compared to the PS2502L-2-E3-A range of -55°C to 100°C. Applications requiring operation below -30°C require design review to confirm compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LTV-825S series be used as a direct replacement for the PS2502L-2-E3-A without PCB modifications?

A: Yes. The LTV-825S, LTV-825S-TA, and LTV-825S-TA1 share identical 8-SMD Gull Wing package geometry and pin configuration with the PS2502L-2-E3-A, enabling direct PCB-level substitution without layout changes.

Q: What are the key electrical differences between the PS2502L-2-E3-A and LTV-825S series?

A: The LTV-825S series provides higher current transfer ratios (600% minimum versus 200% minimum), faster switching times (60µs/53µs rise/fall versus 100µs/100µs), but lower maximum output voltage (35V versus 40V) and lower maximum output current per channel (80mA versus 160mA). Applications must verify compatibility with these parameter changes.

Q: Which LTV-825S variant should be selected for high-volume production?

A: LTV-825S-TA1 is supplied in Tape & Reel (TR) packaging, optimized for automated pick-and-place assembly. LTV-825S and LTV-825S-TA are available in standard packaging for lower-volume or manual assembly processes.

Q: Are the LTV-825S series components RoHS compliant?

A: Yes. All LTV-825S variants (LTV-825S, LTV-825S-TA, LTV-825S-TA1) are ROHS3 compliant, meeting current environmental regulations.

Q: What is the minimum operating temperature for the LTV-825S series?

A: The LTV-825S series operates from -30°C to 100°C. Applications requiring operation below -30°C must be evaluated separately, as the original PS2502L-2-E3-A supports -55°C minimum.

Q: Do the LTV-825S variants have identical electrical specifications?

A: Yes. LTV-825S, LTV-825S-TA, and LTV-825S-TA1 have identical electrical specifications. The differences are packaging format (Tape & Reel for TA1 variant) and inventory availability.

Q: Is the 5000Vrms isolation voltage maintained in the LTV-825S series?

A: Yes. All LTV-825S variants maintain 5000Vrms isolation voltage, matching the PS2502L-2-E3-A specification.

Q: What is the moisture sensitivity level (MSL) for the LTV-825S series?

A: All LTV-825S variants have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.