PS2701-1-F3-H-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2701-1-F3-H-A is a single-channel optoisolator with transistor output manufactured by CEL, designed for 3750Vrms isolation applications. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing production and maintenance requirements. The part operates with DC input, transistor output configuration, and is housed in a 4-SMD gull wing package suitable for surface mount assembly.

Key Parameters

Parameter	Value
Voltage - Isolation	3750Vrms
Number of Channels	1
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	300% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	40V
Current - Output / Channel	80mA
Vce Saturation (Max)	300mV
Operating Temperature	-55°C ~ 100°C
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the PS2701-1-F3-H-A is determined by strict equivalence in the following critical parameters:

Primary Substitution Criteria:

Voltage - Isolation: 3750Vrms (exact match required)
Number of Channels: 1 (exact match required)
Output Type: Transistor (exact match required)
Current Transfer Ratio range: 50% to 300% @ 5mA (exact match required)
Voltage - Output (Max): 40V (exact match required)
Current - Output / Channel: 80mA (exact match required)
Vce Saturation (Max): 300mV (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: 4-SMD, Gull Wing (exact match required)

Upgrade Substitutes (FODM2701, FODM2701R2): These onsemi parts meet all primary substitution criteria with identical electrical specifications. Differences exist only in packaging format (Tube vs. Cut Tape & Digi-Reel) and operating temperature range (-40°C ~ 110°C vs. -55°C ~ 100°C). Both parts are Active status.

Similar Substitute (LTV-357T): This Lite-On Inc. part meets isolation voltage, channel count, output type, and mounting requirements. Variations include higher maximum Current Transfer Ratio (600% vs. 300%), lower maximum output voltage (35V vs. 40V), reduced output current (50mA vs. 80mA), and improved Vce Saturation (200mV vs. 300mV). Package designation differs (4-SOP vs. 4-SMD).

Parametric Equivalent (PS2701-1-F3-A): This Renesas part is electrically identical to the main part but carries "Not For New Designs" status. It shares the same NEPOC series designation and identical electrical parameters.

Parameter Comparison

Parameter	PS2701-1-F3-H-A (CEL)	FODM2701 (onsemi)	FODM2701R2 (onsemi)	LTV-357T (Lite-On)	PS2701-1-F3-A (Renesas)
Voltage - Isolation	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms
Number of Channels	1	1	1	1	1
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	300% @ 5mA	300% @ 5mA	300% @ 5mA	600% @ 5mA	300% @ 5mA
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	40V	40V	40V	35V	40V
Current - Output / Channel	80mA	80mA	80mA	50mA	80mA
Vce Saturation (Max)	300mV	300mV	300mV	200mV	300mV
Operating Temperature	-55°C ~ 100°C	-40°C ~ 110°C	-40°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	987 Pcs	20046 Pcs	1718 Pcs	10099 Pcs	355200 Pcs

Engineering Selection Recommendations

For Direct Replacement (Upgrade Substitutes):

FODM2701 and FODM2701R2 manufactured by onsemi are the primary upgrade substitutes for PS2701-1-F3-H-A. Both parts maintain identical electrical specifications across all critical parameters including isolation voltage, current transfer ratio, output voltage and current ratings, and saturation voltage. The distinction between these two onsemi parts is packaging format: FODM2701 is supplied in Tube packaging, while FODM2701R2 is supplied in Cut Tape (CT) & Digi-Reel format. Both are Active status products with ROHS3 compliance and REACH unaffected designation. The operating temperature range extends to 110°C maximum compared to 100°C for the original part, providing enhanced thermal margin. Inventory availability is substantial for both variants (20046 and 1718 units respectively).

For Constrained Applications (Similar Substitute):

LTV-357T manufactured by Lite-On Inc. is a similar substitute suitable for applications where the reduced output current specification (50mA vs. 80mA) and lower maximum output voltage (35V vs. 40V) are acceptable. This part offers superior Vce Saturation performance (200mV vs. 300mV) and higher maximum Current Transfer Ratio (600% vs. 300%), which may provide operational advantages in specific circuit topologies. The part maintains the required 3750Vrms isolation voltage and single-channel transistor output configuration. Operating temperature range is -55°C ~ 110°C, matching the lower temperature limit of the original part while extending the upper limit. LTV-357T is Active status with ROHS3 compliance.

For Legacy System Maintenance (Parametric Equivalent):

PS2701-1-F3-A manufactured by Renesas Electronics Corporation is a parametric equivalent with identical electrical specifications to PS2701-1-F3-H-A. This part carries "Not For New Designs" status and should be used only for maintenance of existing systems where component continuity is required. Substantial inventory (355200 units) is available. This part is suitable only for replacement in operational systems and not for new product development.

Frequently Asked Questions (FAQ)

Q: Can FODM2701 and FODM2701R2 be used interchangeably with PS2701-1-F3-H-A?

A: Yes. Both onsemi parts are electrically equivalent to PS2701-1-F3-H-A across all critical parameters. The difference between FODM2701 and FODM2701R2 is packaging format only (Tube vs. Cut Tape & Digi-Reel). Selection between them depends on assembly line requirements and tape reel compatibility.

Q: What are the limitations of using LTV-357T as a substitute?

A: LTV-357T has two electrical differences: maximum output current is 50mA instead of 80mA, and maximum output voltage is 35V instead of 40V. Applications requiring the full 80mA output current or 40V output voltage cannot use this substitute. Verify circuit requirements before selection.

Q: Why is PS2701-1-F3-A marked "Not For New Designs"?

A: PS2701-1-F3-A carries this designation from Renesas Electronics Corporation. This part should be used only for maintenance and repair of existing systems. New product designs must use active-status alternatives such as FODM2701 or FODM2701R2.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. PS2701-1-F3-H-A, FODM2701, FODM2701R2, LTV-357T, and PS2701-1-F3-A are all ROHS3 compliant. All parts are REACH unaffected.

Q: Does the operating temperature range difference affect substitution?

A: FODM2701 and FODM2701R2 operate to 110°C maximum, compared to 100°C for PS2701-1-F3-H-A. This represents an improvement and does not restrict substitution. If the original design operates near 100°C, the onsemi parts provide additional thermal margin. LTV-357T extends to 110°C as well.

Q: What is the difference between 4-SMD and 4-SOP package designations?

A: Both designations refer to surface mount packages with four leads in gull wing configuration. The PS2701-1-F3-H-A uses 4-SMD designation, while PS2701-1-F3-A uses 4-SOP designation. LTV-357T uses 4-SOP designation. These are functionally equivalent package types for the specified components and do not restrict substitution at the functional level.

Q: Which substitute offers the best availability?

A: PS2701-1-F3-A has the highest inventory (355200 units), but carries "Not For New Designs" status. For active-status parts, FODM2701 offers the highest inventory (20046 units) followed by LTV-357T (10099 units).

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