FODM2701AV Equivalent & Substitute Parts

Part Overview

The FODM2701AV is a 3750Vrms optoisolator with transistor output manufactured by onsemi in a 4-SMD surface mount package. This component provides single-channel galvanic isolation for DC input signals with 80mA output current capability. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across isolation voltage, output current, and switching characteristics while accommodating available packaging options.

Key Parameters

Parameter	Value
Voltage - Isolation	3750Vrms
Number of Channels	1
Output Type	Transistor
Voltage - Output (Max)	40V
Current - Output / Channel	80mA
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	300% @ 5mA
Rise / Fall Time (Typ)	3µs, 3µs
Vce Saturation (Max)	300mV
Operating Temperature	-40°C ~ 110°C
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Voltage - Isolation: Must equal 3750Vrms
Number of Channels: Must equal 1
Output Type: Must be Transistor
Voltage - Output (Max): Must be ≥40V
Current - Output / Channel: Must be ≥80mA
Current Transfer Ratio Range: Must encompass or overlap the 50%-300% specification
Mounting Type: Must be Surface Mount
Package / Case: Must be 4-SMD, Gull Wing compatible

All substitute parts listed meet these core electrical and mechanical requirements. Variations in rise/fall time, Vce saturation, operating temperature range, and manufacturer-specific certifications do not disqualify substitution but may affect application suitability.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	Output Current	CTR Min @ 5mA	CTR Max @ 5mA	Vce Sat (Max)	Rise/Fall Time	Temp Range	Product Status
FODM2701AV	onsemi	3750Vrms	80mA	50%	300%	300mV	3µs, 3µs	-40°C ~ 110°C	Obsolete
FODM2701R2	onsemi	3750Vrms	80mA	50%	300%	300mV	3µs, 3µs	-40°C ~ 110°C	Active
PS2701-1-F3-L-A	Renesas Electronics	3750Vrms	80mA	100%	300%	300mV	3µs, 5µs	-55°C ~ 100°C	Active
PS2701-1-L-A	Renesas Electronics	3750Vrms	80mA	100%	300%	300mV	3µs, 5µs	-55°C ~ 100°C	Active
PS2701-1-V-F3-L-A	Renesas Electronics	3750Vrms	80mA	100%	300%	300mV	3µs, 5µs	-55°C ~ 100°C	Active
PS2701-1-F3-A	Renesas Electronics	3750Vrms	80mA	50%	300%	300mV	3µs, 5µs	-55°C ~ 100°C	Not For New Designs
PS2701-1-F3-H-A	Renesas Electronics	3750Vrms	80mA	50%	300%	300mV	3µs, 5µs	-55°C ~ 100°C	Active
PS2701-1-F3-M-A	Renesas Electronics	3750Vrms	80mA	50%	150%	300mV	3µs, 5µs	-55°C ~ 100°C	Active
LTV-357T	Lite-On Inc.	3750Vrms	50mA	50%	600%	200mV	4µs, 3µs	-55°C ~ 110°C	Active
LTV-357T-B	Lite-On Inc.	3750Vrms	50mA	130%	260%	200mV	4µs, 3µs	-55°C ~ 110°C	Active
PC451J00000F	SHARP/Socle Technology	3750Vrms	50mA	40%	—	300mV	4µs, 5µs	-25°C ~ 100°C	Active

Engineering Selection Recommendations

Primary Recommendation: FODM2701R2

FODM2701R2 is the direct onsemi equivalent with identical electrical specifications and active product status. This part provides the most direct replacement path with no design modifications required.

Secondary Recommendations: Renesas PS2701 Series

The PS2701-1-F3-H-A and PS2701-1-F3-M-A are active Renesas alternatives meeting all core electrical parameters. PS2701-1-F3-H-A maintains the full 50%-300% CTR range. PS2701-1-F3-M-A operates within a narrower 50%-150% CTR band, suitable for applications with defined CTR requirements. Both parts carry ROHS3 compliance and REACH unaffected status.

PS2701-1-L-A and PS2701-1-V-F3-L-A offer identical electrical performance with extended temperature range (-55°C to 100°C). PS2701-1-L-A carries REACH affected status; PS2701-1-V-F3-L-A is REACH unaffected.

PS2701-1-F3-A is marked "Not For New Designs" and should be avoided for new applications despite meeting electrical requirements.

Alternative Consideration: Lite-On LTV-357T Series

LTV-357T and LTV-357T-B are active alternatives with 3750Vrms isolation and transistor output. Both parts operate at reduced output current (50mA versus 80mA). LTV-357T-B provides narrower CTR specification (130%-260%) with improved Vce saturation (200mV). These parts are suitable only for applications tolerating 50mA maximum output current.

Not Recommended: PC451J00000F

PC451J00000F operates at reduced output current (50mA) and narrower operating temperature range (-25°C to 100°C). The maximum CTR specification is not provided. This part is suitable only for applications with relaxed current and temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can LTV-357T or PC451J00000F replace FODM2701AV directly?

A: No. Both parts are rated for 50mA maximum output current, while FODM2701AV is rated for 80mA. Direct substitution is valid only if the application circuit requires ≤50mA output current. Verify circuit requirements before selection.

Q: What is the difference between PS2701-1-F3-H-A and PS2701-1-F3-M-A?

A: Both parts are Renesas PS2701 variants with identical isolation voltage, output current, and saturation voltage. PS2701-1-F3-H-A maintains 50%-300% CTR range matching the original FODM2701AV. PS2701-1-F3-M-A operates within a narrower 50%-150% CTR band. Select PS2701-1-F3-H-A for applications requiring the full CTR range; select PS2701-1-F3-M-A if the narrower range meets circuit specifications.

Q: Are there compliance differences between substitute parts?

A: Yes. FODM2701R2, PS2701-1-F3-H-A, PS2701-1-F3-M-A, and PS2701-1-V-F3-L-A carry ROHS3 compliance and REACH unaffected status. PS2701-1-L-A is ROHS3 compliant but REACH affected. PC451J00000F is RoHS compliant. All parts carry EAR99 ECCN classification. Verify compliance requirements for your application before final selection.

Q: Does operating temperature range affect substitution?

A: Operating temperature range does not disqualify substitution but may affect application suitability. FODM2701AV operates -40°C to 110°C. Renesas PS2701 variants operate -55°C to 100°C (narrower upper limit). Lite-On LTV-357T variants operate -55°C to 110°C. PC451J00000F operates -25°C to 100°C. Select parts matching or exceeding your application temperature requirements.

Q: What does "Not For New Designs" mean for PS2701-1-F3-A?

A: This status indicates the part is available but Renesas does not recommend it for new circuit designs. Existing designs using this part may continue, but new applications should select active alternatives such as PS2701-1-F3-H-A or FODM2701R2.

Q: Are package differences significant?

A: All listed parts use 4-SMD surface mount packages with gull wing leads, maintaining mechanical compatibility. Supplier device package designations (4-SOP, 4-Mini-Flat) reflect internal classification but do not affect PCB footprint compatibility for standard 4-SMD gull wing layouts.

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