SFH615AY-X019 Equivalent & Substitute Parts

Part Overview

The SFH615AY-X019 is an optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. This component provides 5300Vrms isolation with single-channel transistor output in a 4-SMD surface mount package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain core electrical and mechanical compatibility while offering active product status and improved availability.

Key Parameters

Parameter	SFH615AY-X019
Voltage - Isolation	5300Vrms
Number of Channels	1
Output Type	Transistor
Voltage - Output (Max)	70V
Current - Output / Channel	50mA
Vce Saturation (Max)	400mV
Input Type	DC
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
Operating Temperature	-55°C ~ 100°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Voltage - Isolation: Must match 5300Vrms for equivalent electrical isolation performance
Number of Channels: Must be 1 channel
Output Type: Must be Transistor
Voltage - Output (Max): Must be 70V or greater
Current - Output / Channel: Must support 50mA
Vce Saturation (Max): Must not exceed 400mV
Package / Case: Must be 4-SMD, Gull Wing for mechanical compatibility
Mounting Type: Must be Surface Mount
Input Type: Must be DC

All substitute parts listed below meet these core requirements. Parts SFH615A-2XSMT&R, SFH615A-3XSMT&R, and SFH615A-4XSMT&R maintain 5300Vrms isolation. Parts SFH617A-2XSMT&R and SFH617A-3XSMT&R operate at 7.5Vpk isolation, which represents a different isolation specification and should be selected only when lower isolation voltage is acceptable for the application.

Parameter Comparison

Parameter	SFH615AY-X019	SFH615A-2XSMT&R	SFH615A-3XSMT&R	SFH615A-4XSM	SFH615A-4XSMT&R	SFH617A-2XSMT&R	SFH617A-3XSMT&R
Voltage - Isolation	5300Vrms	5300Vrms	5300Vrms	5300Vrms	5300Vrms	7.5Vpk	7.5Vpk
Number of Channels	1	1	1	1	1	1	1
Current Transfer Ratio (Min)	50% @ 5mA	63% @ 10mA	100% @ 10mA	160% @ 10mA	160% @ 10mA	63% @ 10mA	100% @ 10mA
Current Transfer Ratio (Max)	150% @ 5mA	125% @ 10mA	200% @ 10mA	320% @ 10mA	320% @ 10mA	125% @ 10mA	200% @ 10mA
Turn On Time (Typ)	2µs	4.2µs	4.2µs	6µs	6µs	-	-
Turn Off Time (Typ)	25µs	23µs	23µs	25µs	25µs	-	-
Voltage - Output (Max)	70V	70V	70V	70V	70V	70V	70V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.25V	1.65V (Max)	1.65V (Max)	1.65V (Max)	1.65V (Max)	1.65V (Max)	1.65V (Max)
Current - DC Forward (If) (Max)	60mA	50mA	50mA	50mA	50mA	50mA	50mA
Vce Saturation (Max)	400mV	400mV	400mV	400mV	400mV	400mV	400mV
Operating Temperature	-55°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	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	4-SMD, Gull Wing	4-SMD, Gull Wing
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Primary Substitutes (5300Vrms Isolation):

SFH615A-2XSMT&R, SFH615A-3XSMT&R, SFH615A-4XSMT&R, and SFH615A-4XSM are direct substitutes maintaining 5300Vrms isolation specification. All are active products with ROHS3 compliance and REACH unaffected status. These parts are suitable for applications requiring the original isolation voltage.

SFH615A-4XSMT&R and SFH615A-4XSM offer higher current transfer ratios (160-320% @ 10mA) compared to the original part (50-150% @ 5mA), providing improved switching performance. SFH615A-3XSMT&R provides moderate current transfer ratio (100-200% @ 10mA). SFH615A-2XSMT&R offers the lowest current transfer ratio (63-125% @ 10mA) among the 5300Vrms options.

Packaging consideration: SFH615A-4XSMT&R and SFH615A-2XSMT&R, SFH615A-3XSMT&R are supplied in Tape & Reel. SFH615A-4XSM is supplied in Tube.

Alternative Substitutes (7.5Vpk Isolation):

SFH617A-2XSMT&R and SFH617A-3XSMT&R operate at 7.5Vpk isolation, which is significantly lower than the original 5300Vrms specification. These parts are active products with ROHS3 compliance and REACH unaffected status. Selection of these parts is appropriate only when application requirements permit reduced isolation voltage.

Temperature Range Consideration:

All substitute parts operate over -30°C to 100°C, which is narrower than the original part's -55°C to 100°C range. Applications requiring operation below -30°C require design review.

Frequently Asked Questions (FAQ)

Q: Can SFH615A series parts directly replace the SFH615AY-X019?

A: Yes. SFH615A-2XSMT&R, SFH615A-3XSMT&R, SFH615A-4XSMT&R, and SFH615A-4XSM maintain the same 5300Vrms isolation voltage, single-channel transistor output, 70V maximum output voltage, 50mA output current, and 4-SMD gull wing package. All are active products with current availability.

Q: What is the difference between SFH615A and SFH617A series?

A: The primary difference is isolation voltage. SFH615A series maintains 5300Vrms isolation matching the original part. SFH617A series operates at 7.5Vpk isolation, which is substantially lower. SFH617A parts are suitable only when lower isolation voltage is acceptable for the application.

Q: How do current transfer ratios differ among the SFH615A substitutes?

A: Current transfer ratio varies by part number. SFH615A-2XSMT&R provides 63-125% @ 10mA. SFH615A-3XSMT&R provides 100-200% @ 10mA. SFH615A-4XSMT&R and SFH615A-4XSM provide 160-320% @ 10mA. Higher current transfer ratios indicate improved switching efficiency and reduced input current requirements.

Q: What packaging options are available?

A: SFH615A-2XSMT&R, SFH615A-3XSMT&R, and SFH615A-4XSMT&R are supplied in Tape & Reel (TR) packaging. SFH615A-4XSM is supplied in Tube packaging. All maintain the same 4-SMD gull wing component form factor for PCB assembly.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the operating temperature range for substitute parts?

A: All substitute parts operate from -30°C to 100°C. The original SFH615AY-X019 operates from -55°C to 100°C. Applications requiring operation below -30°C require design verification with substitute parts.

Q: Can I use SFH615A-4XSM in place of SFH615A-4XSMT&R?

A: Both parts are electrically identical with the same 5300Vrms isolation, current transfer ratio (160-320% @ 10mA), and electrical specifications. The difference is packaging: SFH615A-4XSM is supplied in Tube, while SFH615A-4XSMT&R is supplied in Tape & Reel. Selection depends on assembly process requirements and inventory management.

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