PS2705-1-F3-L-A Equivalent & Substitute Parts

Part Overview

The PS2705-1-F3-L-A is a 3750Vrms optoisolator with transistor output, manufactured by CEL in the NEPOC series. This component provides galvanic isolation for signal transmission across potential barriers in industrial and consumer applications. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain isolation voltage, output characteristics, and physical form factors to ensure circuit compatibility.

Substiute Parts

PS2705-1-F3-L-A

CELIn Stock: 1152PS2705-1-F3-L-A Datasheet

Current PartRFQ

FODM2705

onsemiIn Stock: 44398FODM2705 Datasheet

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FODM2705R2

onsemiIn Stock: 110269FODM2705R2 Datasheet

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FODM2705R2V

onsemiIn Stock: 45306FODM2705R2V Datasheet

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HCPL-354-000E

Broadcom LimitedIn Stock: 12556HCPL-354-000E Datasheet

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LTV-354T

Lite-On Inc.In Stock: 90406LTV-354T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts are qualified based on the following mandatory electrical and mechanical criteria:

Primary Matching Criteria:

• Isolation voltage of 3750Vrms (identical)
• Single channel configuration
• Transistor output type
• Surface mount packaging (4-SMD form factor)
• Compatible output voltage and current ratings

Acceptable Parameter Variance:

• Current Transfer Ratio: Minimum CTR may vary; maximum CTR must be 300% or higher
• Output voltage: 35V to 40V acceptable (primary part rated 40V)
• Output current: 50mA to 80mA acceptable (primary part rated 80mA)
• Vce saturation: 200mV to 300mV acceptable
• Operating temperature range: May be broader or narrower than primary part

Substitute parts identified include onsemi FODM2705 series (FODM2705, FODM2705R2, FODM2705R2V), Broadcom HCPL-354-000E, and Lite-On LTV-354T. All maintain 3750Vrms isolation voltage and transistor output configuration.

Parameter Comparison

Engineering Selection Recommendations

onsemi FODM Series (FODM2705, FODM2705R2, FODM2705R2V): These parts are functionally equivalent to the primary PS2705-1-F3-L-A across all isolation, output, and package specifications. Output current and voltage ratings match the original part. Operating temperature range extends to 110°C. All variants are ROHS3 compliant and REACH unaffected. Selection between FODM2705, FODM2705R2, and FODM2705R2V depends on packaging requirements: Tube, Tape & Reel (TR), and Tape & Reel (TR) respectively. These parts are in active production with high inventory availability.

Broadcom HCPL-354-000E: This part maintains 3750Vrms isolation and transistor output configuration. Output voltage is reduced to 35V and output current to 50mA compared to the primary part. Package type differs (4-Mini-Flat vs. 4-SOP). Operating temperature range matches the primary part (-55°C to 100°C). Selection is appropriate only where reduced output current and voltage are sufficient for circuit requirements.

Lite-On LTV-354T: This part meets isolation voltage and output type requirements with 3750Vrms and transistor output. Maximum output voltage is 35V and output current is 50mA. Operating temperature extends to 110°C. Package type is 4-SOP, matching the primary part form factor. Selection is appropriate where reduced output specifications are compatible with circuit design.

Frequently Asked Questions (FAQ)

Q: Can FODM2705, FODM2705R2, and FODM2705R2V be used interchangeably with PS2705-1-F3-L-A? A: Yes. These three onsemi variants maintain identical isolation voltage, output voltage/current ratings, and equivalent package form factors. Selection depends on packaging format required for assembly: tube for individual components, or tape & reel for automated placement. All three are ROHS3 compliant.

Q: What is the difference between FODM2705R2 and FODM2705R2V? A: Both parts are supplied in Tape & Reel (TR) packaging and share identical electrical specifications. The suffix "V" designation indicates a packaging or qualification variant from onsemi. Electrical performance is equivalent.

Q: Are HCPL-354-000E and LTV-354T suitable replacements? A: These parts provide 3750Vrms isolation and transistor output, meeting core requirements. However, maximum output current is reduced from 80mA to 50mA, and maximum output voltage from 40V to 35V. These substitutes are suitable only if circuit design allows reduced output specifications.

Q: What is the difference between 4-SOP and 4-Mini-Flat packages? A: Both are surface-mount packages with four leads. 4-SOP (Small Outline Package) and 4-Mini-Flat differ in lead geometry and footprint dimensions. PCB layouts designed for one package type may not directly accommodate the other without redesign. Verify PCB footprint compatibility before selection.

Q: Why does CTR (Current Transfer Ratio) vary between substitute parts? A: CTR specifications depend on input test conditions. PS2705-1-F3-L-A specifies CTR at 5mA input, while HCPL-354-000E and LTV-354T specify CTR at 1mA input. All parts meet their respective maximum CTR of 300% or higher, ensuring adequate signal transfer. Selection based on circuit bias current requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All identified substitute parts (FODM2705 series, HCPL-354-000E, LTV-354T) are ROHS3 compliant and REACH unaffected, matching the primary PS2705-1-F3-L-A compliance status.

Q: What is Moisture Sensitivity Level (MSL) and why is it important? A: MSL 1 (Unlimited) indicates the component has unlimited shelf life without special moisture control during storage or handling. All identified parts maintain MSL 1 classification, requiring no special environmental controls for standard warehouse storage and assembly operations.