PS2701-1-F3-A Equivalent & Substitute Parts

Part Overview

The PS2701-1-F3-A is a single-channel optoisolator with transistor output manufactured by CEL (Renesas Electronics Corporation). This component provides 3750Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation in 4-SMD surface mount packaging. The part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing production and maintenance applications.

Substiute Parts

PS2701-1-F3-A

CELIn Stock: 355238PS2701-1-F3-A Datasheet

Current PartRFQ

FODM2701

onsemiIn Stock: 20077FODM2701 Datasheet

UpgradeRFQ

FODM2701R2

onsemiIn Stock: 1753FODM2701R2 Datasheet

UpgradeRFQ

LTV-357T

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

SimilarRFQ

PS2701-1-F3-A

Renesas Electronics CorporationIn Stock: 355266PS2701-1-F3-A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS2701-1-F3-A is determined by the following critical parameters:

Primary Substitution Criteria:

• Isolation voltage: 3750Vrms (exact match required)
• Number of channels: 1 (exact match required)
• Output type: Transistor (exact match required)
• Input type: DC (exact match required)
• Mounting type: Surface Mount (exact match required)
• Package configuration: 4-SMD, Gull Wing (exact match required)

Secondary Compatibility Parameters:

• Maximum output voltage: 40V or greater
• Maximum output current: 80mA or greater
• Current transfer ratio range: 50% minimum @ 5mA
• Vce saturation: 300mV or lower
• Forward voltage: compatible with circuit design requirements

Parts are classified into three categories based on substitution relationship:

Upgrade Parts (Direct Substitutes): FODM2701 and FODM2701R2 from onsemi meet all primary criteria with identical electrical specifications and active product status.

Similar Parts (Functional Equivalents): LTV-357T from Lite-On Inc. meets all primary criteria with minor parameter variations in output current and saturation voltage.

Parametric Equivalent: PS2701-1-F3-A (original part listed as parametric equivalent) represents the original specification baseline.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: FODM2701 or FODM2701R2 (onsemi)

The FODM2701 and FODM2701R2 are direct upgrades to the PS2701-1-F3-A. Both parts are manufactured by onsemi and maintain identical electrical specifications across all critical parameters: 3750Vrms isolation, 1 channel, transistor output, 40V maximum output voltage, and 80mA maximum output current. Both parts carry active product status, ensuring long-term availability and supply chain stability. ROHS3 compliance and REACH unaffected status match the original part. The primary distinction between FODM2701 and FODM2701R2 is packaging format: FODM2701 is supplied in Tube packaging, while FODM2701R2 is supplied in Cut Tape (CT) & Digi-Reel® format. Selection between these two should be based on procurement and assembly requirements.

Secondary Recommendation: LTV-357T (Lite-On Inc.)

The LTV-357T from Lite-On Inc. is a functional equivalent meeting all primary substitution criteria. This part maintains 3750Vrms isolation voltage, single-channel transistor output, and DC input configuration. The LTV-357T offers an extended operating temperature range (-55°C ~ 110°C) compared to the original part (-55°C ~ 100°C), providing broader thermal coverage. However, the LTV-357T has reduced maximum output current (50mA versus 80mA) and maximum output voltage (35V versus 40V). The LTV-357T is suitable for applications where output current requirements do not exceed 50mA and output voltage does not exceed 35V. This part carries active product status and full compliance certifications.

Availability Consideration:

The original PS2701-1-F3-A maintains substantial inventory (355200 Pcs), despite discontinued status at DiGi Electronics. This inventory availability may support near-term requirements. However, for long-term production planning, onsemi FODM2701 series parts are recommended due to active product status and established supply chain presence.

Frequently Asked Questions (FAQ)

Q: Can FODM2701 directly replace PS2701-1-F3-A without circuit modification?

A: Yes. FODM2701 maintains identical electrical specifications across all critical parameters: isolation voltage (3750Vrms), output type (transistor), maximum output voltage (40V), maximum output current (80mA), and current transfer ratio range (50-300% @ 5mA). No circuit modification is required for direct substitution.

Q: What is the difference between FODM2701 and FODM2701R2?

A: FODM2701 and FODM2701R2 are electrically identical. The difference is packaging format: FODM2701 is supplied in Tube packaging, while FODM2701R2 is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly line requirements and procurement preferences.

Q: Can LTV-357T be used in all applications where PS2701-1-F3-A is specified?

A: LTV-357T is suitable only for applications where maximum output current does not exceed 50mA and maximum output voltage does not exceed 35V. The original PS2701-1-F3-A supports 80mA output current and 40V output voltage. Applications requiring these higher ratings must use FODM2701 or FODM2701R2.

Q: What is the significance of the operating temperature range difference?

A: PS2701-1-F3-A operates from -55°C to 100°C. FODM2701 and FODM2701R2 operate from -40°C to 110°C. LTV-357T operates from -55°C to 110°C. For applications requiring operation below -40°C, only PS2701-1-F3-A or LTV-357T are suitable. For applications requiring operation above 100°C, only FODM2701, FODM2701R2, or LTV-357T are suitable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. PS2701-1-F3-A, FODM2701, FODM2701R2, and LTV-357T are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What does "Discontinued at DiGi Electronics" mean for PS2701-1-F3-A?

A: This designation indicates that DiGi Electronics, a major electronics distributor, no longer actively stocks or promotes this part. However, the part may remain available through other channels or existing inventory. The product status "Not For New Designs" indicates the manufacturer recommends using alternative parts for new applications. Existing inventory of 355200 Pcs suggests availability for current production needs, but long-term supply cannot be guaranteed.

Q: How do current transfer ratios affect circuit performance?

A: Current transfer ratio (CTR) determines the output current relative to input current. All substitute parts maintain the same CTR range (50-300% @ 5mA) as the original PS2701-1-F3-A, except LTV-357T which offers higher maximum CTR (600% @ 5mA). Higher CTR provides greater output current for the same input current, improving circuit efficiency and noise margin.

Q: What is the importance of Vce saturation specifications?

A: Vce saturation (maximum collector-emitter voltage in saturation) affects output voltage swing and power dissipation. PS2701-1-F3-A, FODM2701, and FODM2701R2 specify 300mV maximum saturation voltage. LTV-357T specifies 200mV, providing lower saturation voltage and reduced power dissipation. Lower saturation voltage is beneficial for low-voltage output applications.