FOD617A Optoisolator Equivalent & Substitute Parts

Part Overview

The FOD617A is a 5000Vrms optoisolator with transistor output in 4-DIP package manufactured by onsemi. This component provides galvanic isolation for single-channel DC input applications with 50mA output current capability. The FOD617A is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain compatibility across isolation voltage, output current, package configuration, and operating temperature range.

Key Parameters

Parameter	FOD617A Specification
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	40% @ 10mA
Current Transfer Ratio (Max)	80% @ 10mA
Maximum Output Voltage	70V
Maximum Output Current	50mA
Vce Saturation (Max)	400mV
Operating Temperature Range	-55°C to 110°C
Package Type	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Isolation Voltage: Minimum 5000Vrms (5300Vrms acceptable as higher rating)
Package Configuration: 4-DIP (0.300", 7.62mm) through-hole only
Output Type: Transistor output required
Number of Channels: Single channel (1 channel)
Maximum Output Current: 50mA minimum
Maximum Output Voltage: 70V minimum
Operating Temperature: -55°C to 110°C minimum
Input Type: DC input required

Substitute parts are grouped by manufacturer and current transfer ratio performance grade. All listed substitutes meet or exceed the isolation voltage, output current, and package requirements of the FOD617A.

Parameter Comparison

Parameter	FOD617A	FOD817A	SFH617A-1X001	SFH617A-2X001	SFH617A-3X001	SFH617A-4X001	VO615A-1
Manufacturer	onsemi	onsemi	Vishay	Vishay	Vishay	Vishay	Vishay
Isolation Voltage	5000Vrms	5000Vrms	5300Vrms	5300Vrms	5300Vrms	5300Vrms	5000Vrms
CTR Min @ 10mA	40%	80% @ 5mA	40%	63%	100%	160%	40%
CTR Max @ 10mA	80%	160% @ 5mA	80%	125%	200%	320%	80%
Max Output Voltage	70V	70V	70V	70V	70V	70V	70V
Max Output Current	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Vce Saturation (Max)	400mV	200mV	400mV	400mV	400mV	400mV	300mV
Operating Temperature	-55°C to 110°C	-55°C to 110°C	-55°C to 110°C	-55°C to 110°C	-55°C to 110°C	-55°C to 110°C	-55°C to 110°C
Package	4-DIP	4-DIP	4-DIP	4-DIP	4-DIP	4-DIP	4-DIP
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

onsemi FOD817A: Direct onsemi alternative with active product status. Meets all electrical and mechanical compatibility requirements. Offers improved Vce saturation (200mV vs 400mV) and higher current transfer ratio performance. ROHS3 compliant. Suitable for direct replacement in new designs.

Vishay SFH617A Series (1X001, 2X001, 3X001, 4X001): Four performance grades available with current transfer ratio options from 40% to 320%. All variants feature 5300Vrms isolation (exceeds FOD617A requirement), ROHS3 compliance, and active product status. Selection within this series depends on required current transfer ratio performance:

SFH617A-1X001: 40-80% CTR (equivalent to FOD617A performance)
SFH617A-2X001: 63-125% CTR (mid-range performance)
SFH617A-3X001: 100-200% CTR (high performance)
SFH617A-4X001: 160-320% CTR (maximum performance)

Vishay VO615A-1: Meets all compatibility requirements with 5000Vrms isolation matching FOD617A specification. ROHS3 compliant and active product status. Offers intermediate Vce saturation (300mV) between FOD617A and FOD817A.

Frequently Asked Questions (FAQ)

Q: Can FOD817A replace FOD617A in existing designs? A: Yes. FOD817A is manufactured by the same supplier (onsemi), maintains identical package configuration, isolation voltage, output current, and operating temperature range. The active product status and ROHS3 compliance make it suitable for direct substitution.

Q: What is the difference between SFH617A variants? A: The SFH617A series offers four current transfer ratio (CTR) performance grades. The suffix number (1, 2, 3, 4) indicates CTR performance level. Selection depends on your circuit's required gain characteristics. All variants share identical isolation voltage (5300Vrms), package, and output specifications.

Q: Are Vishay SFH617A parts compatible with FOD617A? A: Yes. All SFH617A variants meet or exceed FOD617A electrical and mechanical specifications. The 5300Vrms isolation rating exceeds the 5000Vrms requirement. Package configuration, output current, and operating temperature range are identical. ROHS3 compliance and active product status support long-term availability.

Q: What is the significance of higher isolation voltage in substitute parts? A: Higher isolation voltage (5300Vrms vs 5000Vrms) provides additional safety margin and is fully compatible with applications designed for 5000Vrms isolation. No circuit modifications are required.

Q: Can I use VO615A-1 as a substitute? A: Yes. VO615A-1 meets all compatibility criteria with matching 5000Vrms isolation, 4-DIP package, 50mA output current, and -55°C to 110°C operating range. ROHS3 compliance and active status support production use.

Q: Why is FOD617A listed as obsolete? A: Obsolete status indicates the manufacturer has discontinued production. Active substitute parts listed here provide equivalent or superior performance and ensure design continuity and supply chain reliability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message