SFH615AY Equivalent & Substitute Parts

Part Overview

The SFH615AY is an optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. This component provides 5300Vrms isolation voltage in a 4-DIP through-hole package and is designed for DC input applications requiring galvanic isolation. The part is active and in production with 17,200 units in stock. Equivalent and substitute parts are identified based on matching isolation voltage, package type, output configuration, and operating temperature range to ensure direct functional compatibility in circuit applications.

Key Parameters

Parameter	SFH615AY Value
Manufacturer	Vishay Semiconductor Opto Division
Category	Optoisolators
Package / Case	4-DIP (0.300", 7.62mm)
Voltage - Isolation	5300Vrms
Number of Channels	1
Output Type	Transistor
Input Type	DC
Voltage - Output (Max)	70V
Current - Output / Channel	50mA
Operating Temperature	-55°C ~ 100°C
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SFH615AY are grouped by Current Transfer Ratio (CTR) performance grade, which is the primary differentiator within the SFH615 and SFH610 series. All substitute candidates maintain the following critical parameters:

Isolation voltage: 5300Vrms
Package: 4-DIP (0.300", 7.62mm)
Output type: Transistor
Maximum output voltage: 70V
Maximum output current: 50mA per channel
Mounting: Through Hole
Input type: DC
RoHS3 compliance and MSL 1 rating

The SFH615 series variants (SFH615A-1, SFH615A-2, SFH615A-3, SFH615A-4) are direct substitutes with identical isolation voltage and package specifications. The SFH610 series variants (SFH610A-1, SFH610A-2, SFH610A-3, SFH610A-4) are functionally equivalent alternatives from the same manufacturer. The SFH617A series (SFH617A-1, SFH617A-2) extends the operating temperature range to -55°C ~ 110°C, providing enhanced thermal performance for high-temperature applications.

Parameter Comparison

Part Number	CTR Min @ 10mA	CTR Max @ 10mA	Vf (Typ)	Turn On / Turn Off Time (Typ)	Operating Temperature	Inventory (Pcs)	Product Status
SFH615AY	50% @ 5mA	150% @ 5mA	1.25V	2µs, 25µs	-55°C ~ 100°C	17,200	Active
SFH615A-1	40% @ 10mA	80% @ 10mA	1.35V	3µs, 18µs	-55°C ~ 100°C	80,371	Active
SFH615A-2	63% @ 10mA	125% @ 10mA	1.35V	3µs, 2.3µs	-55°C ~ 100°C	57,040	Active
SFH615A-3	100% @ 10mA	200% @ 10mA	1.35V	3µs, 2.3µs	-55°C ~ 100°C	59,875	Active
SFH615A-4	160% @ 10mA	320% @ 10mA	1.35V	3µs, 2.3µs	-55°C ~ 100°C	6,677	Active
SFH610A-1	40% @ 10mA	80% @ 10mA	1.25V	3µs, 2.3µs	-55°C ~ 100°C	1,376	Active
SFH610A-2	63% @ 10mA	125% @ 10mA	1.25V	3µs, 2.3µs	-55°C ~ 100°C	19,287	Active
SFH610A-3	100% @ 10mA	200% @ 10mA	1.25V	3µs, 2.3µs	-55°C ~ 100°C	3,258	Active
SFH610A-4	160% @ 10mA	320% @ 10mA	1.25V	3µs, 2.3µs	-55°C ~ 100°C	7,100	Active
SFH617A-1	40% @ 10mA	80% @ 10mA	1.35V	3µs, 2.3µs	-55°C ~ 110°C	2,083	Active
SFH617A-2	63% @ 10mA	125% @ 10mA	1.35V	3µs, 2.3µs	-55°C ~ 110°C	2,946	Active

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage conditions. Selection among SFH615A variants, SFH610A variants, and SFH617A variants depends on Current Transfer Ratio requirements and operating temperature specifications.

For applications requiring the SFH615AY's specific CTR performance (50–150% @ 5mA), the SFH615A-2 (63–125% @ 10mA) provides the closest electrical match within the same series. The SFH610A-2 offers equivalent CTR performance with lower forward voltage (1.25V vs. 1.35V) and higher inventory availability.

For extended temperature operation beyond 100°C, the SFH617A series extends the upper operating limit to 110°C while maintaining 5300Vrms isolation and 4-DIP packaging. All parts are active products with established supply chains.

Frequently Asked Questions (FAQ)

Q: Can SFH615A variants be used interchangeably with SFH610A variants?

A: Yes, within the same Current Transfer Ratio grade. Both series maintain identical isolation voltage (5300Vrms), package (4-DIP), output configuration (transistor), and operating temperature range (-55°C ~ 100°C). The primary difference is forward voltage: SFH615A series specifies 1.35V typical, while SFH610A series specifies 1.25V typical. Circuit design must account for this voltage difference in input LED drive calculations.

Q: What is the significance of the CTR grade suffix (-1, -2, -3, -4)?

A: The suffix indicates the Current Transfer Ratio performance grade. Grade -1 specifies 40–80% CTR, grade -2 specifies 63–125% CTR, grade -3 specifies 100–200% CTR, and grade -4 specifies 160–320% CTR. Selection depends on the required gain and input current budget of the application.

Q: Is the SFH617A series a direct replacement for SFH615AY?

A: The SFH617A series is functionally compatible but extends the operating temperature range to -55°C ~ 110°C. It maintains 5300Vrms isolation and 4-DIP packaging. Use SFH617A variants only if the extended upper temperature limit is required, as standard SFH615A or SFH610A variants are sufficient for -55°C ~ 100°C applications.

Q: Are all listed parts available in the same packaging format?

A: Yes. All substitute parts are supplied in 4-DIP (0.300", 7.62mm) through-hole packages with identical pin configurations, enabling direct PCB footprint compatibility.

Q: What compliance certifications apply to all substitute parts?

A: All parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. REACH status is Unaffected for all variants. ECCN classification is EAR99 and HTSUS code is 8541.49.8000 across the entire product family.

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