PS2701-1-L-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2701-1-L-A is a single-channel optoisolator with transistor output manufactured by CEL, designed for 3750Vrms isolation applications in 4-SMD surface mount packaging. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain electrical compatibility across isolation voltage, output characteristics, and thermal operating range to ensure direct replacement capability in existing circuit designs.

Substiute Parts

PS2701-1-L-A

CELIn Stock: 1197PS2701-1-L-A Datasheet

Current PartRFQ

FODM2701

onsemiIn Stock: 20077FODM2701 Datasheet

SimilarRFQ

FODM2701R2

onsemiIn Stock: 1753FODM2701R2 Datasheet

SimilarRFQ

LTV-357T

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS2701-1-L-A is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - Isolation: 3750Vrms (all substitutes meet this requirement)
• Number of Channels: 1 (all substitutes are single-channel)
• Output Type: Transistor (all substitutes provide transistor output)
• Mounting Type: Surface Mount (all substitutes are surface mount)
• RoHS Status: ROHS3 Compliant (all substitutes comply)

Electrical Compatibility Parameters:

• Voltage - Output (Max): 40V or greater
• Current - Output / Channel: 80mA or greater
• Vce Saturation (Max): 300mV or lower
• Current Transfer Ratio (Min): 50% @ 5mA or greater

Thermal Operating Range: The PS2701-1-L-A operates from -55°C to 100°C. Substitute parts with extended upper temperature limits (-40°C to 110°C or -55°C to 110°C) provide equivalent or superior thermal coverage.

All three substitute parts meet the mandatory criteria and electrical compatibility thresholds, enabling direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

FODM2701 and FODM2701R2 (onsemi): Both onsemi parts are functionally equivalent substitutes with active product status. FODM2701 is supplied in Tube packaging, while FODM2701R2 is supplied in Cut Tape (CT) & Digi-Reel® format. These parts maintain 3750Vrms isolation, 40V maximum output voltage, and 80mA output current capability. The extended operating temperature range (-40°C to 110°C) provides superior high-temperature performance compared to the PS2701-1-L-A. Current transfer ratio minimum of 50% @ 5mA is lower than the original part's 100%, but remains within acceptable substitution parameters. Both are ROHS3 compliant and carry EAR99 classification.

LTV-357T (Lite-On Inc.): The LTV-357T is an active substitute with identical isolation voltage and single-channel transistor output. This part features superior Vce saturation (200mV maximum versus 300mV) and extended operating temperature range (-55°C to 110°C), matching the original part's lower temperature limit. However, the LTV-357T has reduced output current capability (50mA versus 80mA) and lower maximum output voltage (35V versus 40V). The 4-SOP package differs from the 4-SMD Gull Wing package of the original part, requiring PCB layout modification. This part is suitable only for applications where output current does not exceed 50mA and output voltage does not exceed 35V.

Recommendation Summary: For direct replacement without circuit modification, select FODM2701 or FODM2701R2. For applications with reduced output current requirements (≤50mA) and output voltage requirements (≤35V), LTV-357T is acceptable with PCB layout adjustment for the 4-SOP package.

Frequently Asked Questions (FAQ)

Q: Can FODM2701 and FODM2701R2 be used interchangeably with PS2701-1-L-A? A: Yes. Both onsemi parts maintain the critical electrical parameters: 3750Vrms isolation, 40V maximum output voltage, 80mA output current, and 300mV maximum Vce saturation. The primary difference is packaging format (Tube versus Cut Tape & Digi-Reel®). The lower current transfer ratio minimum (50% versus 100%) does not prevent substitution in applications designed for the original part's specifications.

Q: What is the key limitation of LTV-357T as a substitute? A: The LTV-357T has reduced output current capability (50mA maximum versus 80mA) and lower maximum output voltage (35V versus 40V). It is suitable only for applications where these reduced ratings are acceptable. Additionally, the 4-SOP package requires PCB layout modification compared to the 4-SMD Gull Wing package of the original part.

Q: Are all substitute parts RoHS3 compliant? A: Yes. PS2701-1-L-A, FODM2701, FODM2701R2, and LTV-357T are all ROHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level).

Q: How do the operating temperature ranges compare? A: PS2701-1-L-A operates from -55°C to 100°C. FODM2701 and FODM2701R2 operate from -40°C to 110°C, providing extended high-temperature capability but reduced low-temperature performance. LTV-357T operates from -55°C to 110°C, matching the original part's low-temperature limit while extending the high-temperature range.

Q: What is the difference between FODM2701 and FODM2701R2? A: Both parts are electrically identical. The difference is packaging: FODM2701 is supplied in Tube format, while FODM2701R2 is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly process requirements and inventory management preferences.

Q: Can the PS2701-1-L-A be replaced in high-temperature applications? A: Yes. Both FODM2701/FODM2701R2 and LTV-357T support operation up to 110°C, exceeding the original part's 100°C maximum. For applications requiring the original part's -55°C low-temperature capability, LTV-357T is the appropriate choice.

Q: Are there any compliance or export restrictions on these substitute parts? A: All parts carry EAR99 classification and are ROHS3 compliant. FODM2701 and FODM2701R2 are REACH Unaffected, while PS2701-1-L-A is REACH Affected. Verify REACH compliance requirements for your specific application and region.