FOD617BW Equivalent & Substitute Parts

Part Overview

The FOD617BW is an optoisolator with transistor output manufactured by onsemi, rated for 5000Vrms isolation voltage in a 4-DIP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The FOD617BW provides single-channel isolation with 50mA output current capability and operates across the industrial temperature range of -55°C to 110°C.

Key Parameters

Parameter	FOD617BW Value
Isolation Voltage	5000Vrms
Number of Channels	1
Current Transfer Ratio (Min/Max)	63% / 125% @ 10mA
Output Type	Transistor
Maximum Output Voltage	70V
Maximum Output Current	50mA
Vce Saturation (Max)	400mV
Operating Temperature Range	-55°C to 110°C
Package Type	4-DIP (0.400", 10.16mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the FOD617BW is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Isolation voltage rating of 5000Vrms or higher
Single-channel transistor output configuration
4-DIP through-hole package (0.400", 10.16mm)
Maximum output voltage of 70V or greater
Maximum output current of 50mA or greater
Operating temperature range encompassing -55°C to 110°C
Vce saturation maximum of 400mV or lower

Current Transfer Ratio Matching: The FOD617BW specifies a CTR range of 63% to 125% @ 10mA. Substitute parts are grouped by CTR performance:

Group 1 (40-80% CTR): SFH617A-1X006, SFH617A-1X016
Group 2 (63-125% CTR): SFH617A-2X006, SFH617A-2X016, VO615A-2X006
Group 3 (100-200% CTR): SFH617A-3X006, SFH617A-3X016
Group 4 (160-320% CTR): SFH617A-4X006, SFH617A-4X016

The VO615A-2X006 provides the closest electrical match to the FOD617BW with identical isolation voltage and CTR range, while SFH617A-2X006 and SFH617A-2X016 offer higher isolation voltage (5300Vrms) with matching CTR specifications.

Parameter Comparison

Parameter	FOD617BW	VO615A-2X006	SFH617A-2X006	SFH617A-2X016	SFH617A-1X006	SFH617A-3X006	SFH617A-4X006
Manufacturer	onsemi	Vishay Semiconductor Opto	Vishay Semiconductor Opto	Vishay Semiconductor Opto	Vishay Semiconductor Opto	Vishay Semiconductor Opto	Vishay Semiconductor Opto
Isolation Voltage	5000Vrms	5000Vrms	5300Vrms	5300Vrms	5300Vrms	5300Vrms	5300Vrms
CTR Min/Max @ 10mA	63% / 125%	63% / 125%	63% / 125%	63% / 125%	40% / 80%	100% / 200%	160% / 320%
Turn On/Off Time (Typ)	— / —	6µs / 5µs	3µs / 2.3µs	3µs / 2.3µs	3µs / 2.3µs	3µs / 2.3µs	3µs / 2.3µs
Rise/Fall Time (Typ)	4µs / 3µs	3µs / 4.7µs	2µs / 2µs	2µs / 2µs	2µs / 2µs	2µs / 2µs	2µs / 2µs
Max Output Voltage	70V	70V	70V	70V	70V	70V	70V
Max Output Current	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Vce Saturation (Max)	400mV	300mV	400mV	400mV	400mV	400mV	400mV
Forward Voltage (Typ)	1.35V	1.43V	1.35V	1.35V	1.35V	1.35V	1.35V
Max Forward Current	50mA	60mA	60mA	60mA	60mA	60mA	60mA
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	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute - VO615A-2X006: The VO615A-2X006 is the closest functional equivalent to the FOD617BW. It maintains identical isolation voltage (5000Vrms), matching CTR range (63-125% @ 10mA), and all critical electrical parameters. This part is manufactured by Vishay Semiconductor Opto Division and holds active product status with ROHS3 compliance. The VO615A-2X006 is suitable for direct replacement in existing FOD617BW designs with no circuit modifications required.

Secondary Substitutes - SFH617A-2X006 and SFH617A-2X016: These Vishay parts provide enhanced isolation voltage (5300Vrms) while maintaining the same CTR range as the FOD617BW. Both are active products with ROHS3 compliance. The SFH617A-2X006 offers higher inventory availability (20,100 units) compared to SFH617A-2X016 (17,300 units). These parts are suitable for applications requiring improved isolation margin.

Alternative Substitutes by CTR Requirement:

Lower CTR (40-80%): SFH617A-1X006 and SFH617A-1X016 are suitable for applications tolerating reduced current transfer efficiency.
Higher CTR (100-200% or 160-320%): SFH617A-3X006, SFH617A-3X016, SFH617A-4X006, and SFH617A-4X016 accommodate designs requiring enhanced current transfer characteristics.

All substitute parts are active products with ROHS3 compliance, 4-DIP through-hole packaging, and operating temperature ranges matching the FOD617BW specification.

Frequently Asked Questions (FAQ)

Q: Can the VO615A-2X006 be used as a direct replacement for the FOD617BW? A: Yes. The VO615A-2X006 matches the FOD617BW in isolation voltage (5000Vrms), current transfer ratio range (63-125% @ 10mA), output voltage/current ratings, and 4-DIP package. No circuit modifications are required.

Q: What is the difference between SFH617A-2X006 and SFH617A-2X016? A: Both parts are electrically identical with 5300Vrms isolation and 63-125% CTR. The difference is in packaging: -2X006 uses tube packaging while -2X016 uses different packaging. Electrical performance and pinout are identical.

Q: Why do some substitutes have higher isolation voltage (5300Vrms) than the FOD617BW (5000Vrms)? A: Higher isolation voltage provides additional safety margin and is fully compatible with applications designed for 5000Vrms. The higher rating does not degrade performance in existing circuits.

Q: Can I use SFH617A-1X006 if my application only requires lower current transfer? A: Yes, if your circuit design accommodates the 40-80% CTR range. The SFH617A-1X006 maintains all other critical parameters (isolation voltage, output ratings, temperature range, package) and is suitable for applications with lower CTR requirements.

Q: Are all substitute parts RoHS compliant? A: Yes. All Vishay substitute parts listed (SFH617A series and VO615A-2X006) are ROHS3 compliant. The original FOD617BW does not specify RoHS status due to its obsolete classification.

Q: What is the inventory status of these substitutes? A: All substitute parts are active products with current inventory. VO615A-2X006 has 1,006 units available. SFH617A-2X006 has the highest availability at 20,100 units. Specific inventory levels are subject to change.

Q: Do all substitutes use the same 4-DIP package? A: Yes. All listed substitutes use the 4-DIP (0.400", 10.16mm) through-hole package, ensuring mechanical compatibility with existing PCB layouts designed for the FOD617BW.

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