PS2701-1-V-A Equivalent & Substitute Parts

Part Overview

The PS2701-1-V-A is a 3.75kV isolation optoisolator with transistor output manufactured by CEL in a 4-SMD package. This product is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components to maintain design compatibility and supply chain continuity. The specified substitute parts maintain the core electrical characteristics required for optoisolation applications while offering active product status and assured availability.

Substiute Parts

PS2701-1-V-A

CELIn Stock: 1852PS2701-1-V-A Datasheet

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FODM2701

onsemiIn Stock: 20077FODM2701 Datasheet

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FODM2701R2

onsemiIn Stock: 1753FODM2701R2 Datasheet

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LTV-357T

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS2701-1-V-A is based on the following critical parameters:

Electrical Compatibility Requirements:

• Voltage isolation rating of 3750Vrms
• Transistor output type with single channel configuration
• Maximum output voltage of 40V or greater
• Maximum output current of 80mA or greater
• Current transfer ratio minimum of 50% @ 5mA

Mechanical Compatibility Requirements:

• 4-SMD surface mount package with gull wing leads
• RoHS3 compliance
• MSL rating of 1 (Unlimited)

The substitute parts FODM2701 and FODM2701R2 are direct functional equivalents manufactured by onsemi. The LTV-357T by Lite-On Inc. is classified as a similar part due to package variant differences (4-SOP vs. 4-SMD) and output current rating reduction (50mA vs. 80mA), requiring circuit-level validation for output current requirements.

Parameter Comparison

Engineering Selection Recommendations

Preferred Substitutes (FODM2701 and FODM2701R2):

FODM2701 and FODM2701R2 are the recommended substitutes for PS2701-1-V-A replacement. Both onsemi parts maintain full electrical and mechanical compatibility with identical isolation voltage, output voltage, output current, and package specifications. Both parts hold active product status, ensuring supply chain continuity. FODM2701R2 is supplied in Cut Tape (CT) & Digi-Reel® packaging, while FODM2701 is supplied in Tube packaging; selection between them depends on application assembly and procurement requirements.

The onsemi substitutes feature an expanded operating temperature range (-40°C ~ 110°C vs. -55°C ~ 100°C for the original), which provides superior performance at elevated temperatures. The forward voltage specification differs (1.4V Max vs. 1.1V Typ), requiring verification that input drive circuitry maintains adequate current margin at the design operating point.

Alternative Substitute (LTV-357T):

LTV-357T by Lite-On Inc. is functionally similar but exhibits parameter deviations requiring engineering evaluation. The reduced maximum output current (50mA vs. 80mA) and output voltage (35V vs. 40V) necessitate verification that the application does not exceed these limits. The superior current transfer ratio (600% max vs. 300% max) and lower Vce saturation (200mV vs. 300mV) provide enhanced switching characteristics. The package variant (4-SOP vs. 4-SMD) requires PCB footprint compatibility assessment.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and are fully compliant with environmental and trade regulations matching the original component specifications.

Frequently Asked Questions (FAQ)

Q: Can FODM2701 and FODM2701R2 be used interchangeably with PS2701-1-V-A?

A: Both FODM2701 and FODM2701R2 are direct functional substitutes with identical electrical specifications and 4-SMD package configuration. The difference between them is packaging format: FODM2701 is supplied in Tube, and FODM2701R2 is supplied in Cut Tape (CT) & Digi-Reel®. Selection depends on assembly and procurement requirements. Forward voltage specification differs slightly (1.4V Max vs. 1.1V Typ), requiring input circuit verification.

Q: Is the LTV-357T a drop-in replacement?

A: LTV-357T is electrically compatible but requires circuit-level validation due to parameter differences. Maximum output current is reduced to 50mA (vs. 80mA), and maximum output voltage is 35V (vs. 40V). The package variant (4-SOP supplier device package) requires confirmation of PCB footprint compatibility with 4-SMD designs, though both use 4-SMD gull wing mechanical configuration.

Q: What is the impact of different forward voltage specifications?

A: The onsemi substitutes specify Vf as 1.4V (Max) versus the original 1.1V (Typ). This impacts input LED drive current. Design input circuits must provide sufficient forward current headroom to ensure reliable operation across the operating temperature range and component manufacturing tolerance stack.

Q: Does operating temperature range affect substitute selection?

A: The original PS2701-1-V-A operates from -55°C to 100°C. FODM2701 and FODM2701R2 extend the upper limit to 110°C but reduce the lower limit to -40°C. LTV-357T matches the original lower limit of -55°C and extends to 110°C. Selection depends on application temperature requirements.

Q: Are all parts RoHS3 compliant?

A: Yes, PS2701-1-V-A, FODM2701, FODM2701R2, and LTV-357T are all ROHS3 compliant with MSL Level 1 rating, suitable for lead-free assembly processes.