VOS615A-2T Equivalent & Substitute Parts

Part Overview

The VOS615A-2T is an optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. This component provides 3750Vrms isolation with a single channel configuration in a 4-SSOP surface mount package. The part is currently active in production with 813 units in stock. Equivalent and substitute parts are identified based on matching electrical isolation ratings, output characteristics, and mechanical packaging specifications to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	VOS615A-2T
Manufacturer	Vishay Semiconductor Opto Division
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	3750Vrms
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Current Transfer Ratio (Min)	40% @ 10mA
Current Transfer Ratio (Max)	80% @ 10mA
Vce Saturation (Max)	400mV
Operating Temperature	-55°C ~ 110°C
Package / Case	4-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the VOS615A-2T are qualified based on the following critical parameters that must match or exceed the main part specifications:

Mandatory Matching Parameters:

Voltage - Isolation: 3750Vrms
Number of Channels: 1
Output Type: Transistor
Package / Case: 4-SOIC (0.173", 4.40mm Width)
Mounting Type: Surface Mount
Voltage - Output (Max): 80V
Current - Output / Channel: 50mA
Operating Temperature Range: -55°C ~ 110°C

Allowable Parameter Variations:

Current Transfer Ratio: Substitute parts may have different CTR specifications at different test currents (5mA vs 10mA) provided the minimum CTR meets or exceeds application requirements
Vce Saturation: Substitute parts may have lower saturation voltage (200mV vs 400mV), which represents improved performance
Packaging Format: Tape & Reel (TR), Tube, or Cut Tape (CT) & Digi-Reel® are acceptable variations of the same physical package

Vishay VOS615A series parts (VOS615A-1T and VOS615A-1X001T) are parametric equivalents with identical electrical specifications. Everlight EL3H7 series parts (EL3H7(A)(EA)-G, EL3H7(A)-G, EL3H7(B)(TA)-VG, EL3H7(B)-G, and EL3H7(EA)-VG) are manufacturer-recommended alternatives from a different supplier with equivalent isolation and output ratings.

Parameter Comparison

Parameter	VOS615A-2T	VOS615A-1T	VOS615A-1X001T	EL3H7(A)(EA)-G	EL3H7(A)-G	EL3H7(B)(TA)-VG	EL3H7(B)-G	EL3H7(EA)-VG
Manufacturer	Vishay	Vishay	Vishay	Everlight	Everlight	Everlight	Everlight	Everlight
Number of Channels	1	1	1	1	1	1	1	1
Voltage - Isolation	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V	80V	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Current Transfer Ratio (Min)	40% @ 10mA	40% @ 10mA	40% @ 10mA	80% @ 5mA	80% @ 5mA	130% @ 5mA	130% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	80% @ 10mA	80% @ 10mA	80% @ 10mA	160% @ 5mA	160% @ 5mA	260% @ 5mA	260% @ 5mA	600% @ 5mA
Vce Saturation (Max)	400mV	400mV	400mV	200mV	200mV	200mV	200mV	200mV
Operating Temperature	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C
Package / Case	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	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)	1 (Unlimited)

Engineering Selection Recommendations

Vishay VOS615A Series (VOS615A-1T, VOS615A-1X001T): These parts are parametric equivalents to the VOS615A-2T with identical electrical specifications and ROHS3 compliance. VOS615A-1T is available in Tape & Reel packaging with 20,100 units in stock. VOS615A-1X001T is available in Tape & Reel packaging with 12,590 units in stock and carries the VOS615A series designation. Both parts maintain the same current transfer ratio range (40%-80% @ 10mA) and saturation voltage (400mV) as the main part.

Everlight EL3H7 Series (EL3H7(A)(EA)-G, EL3H7(A)-G, EL3H7(B)(TA)-VG, EL3H7(B)-G, EL3H7(EA)-VG): These manufacturer-recommended alternatives from Everlight Electronics meet the same isolation voltage (3750Vrms), output voltage (80V), and output current (50mA) specifications. All EL3H7 variants feature improved saturation voltage performance (200mV maximum versus 400mV for VOS615A-2T). Current transfer ratio specifications vary across EL3H7 variants:

EL3H7(A)(EA)-G: 80%-160% @ 5mA, Tape & Reel, 2,845 units in stock
EL3H7(A)-G: 80%-160% @ 5mA, Tube, 2,028 units in stock
EL3H7(B)(TA)-VG: 130%-260% @ 5mA, Cut Tape & Digi-Reel®, 1,506 units in stock
EL3H7(B)-G: 130%-260% @ 5mA, Tube, 1,585 units in stock
EL3H7(EA)-VG: 50%-600% @ 5mA, Tape & Reel, 3,852 units in stock

All substitute parts are ROHS3 compliant with MSL 1 rating and operate across the same temperature range (-55°C to 110°C).

Frequently Asked Questions (FAQ)

Q: Can VOS615A-1T be used as a direct replacement for VOS615A-2T? A: Yes. VOS615A-1T is a parametric equivalent with identical isolation voltage (3750Vrms), channel count (1), output type (transistor), current transfer ratio range (40%-80% @ 10mA), and saturation voltage (400mV). Both use the same 4-SOIC package and operate across -55°C to 110°C.

Q: What is the difference between Vishay VOS615A and Everlight EL3H7 optoisolators? A: Both meet the same isolation voltage (3750Vrms), output voltage (80V), and output current (50mA) requirements. The primary differences are manufacturer source and current transfer ratio specifications. Everlight EL3H7 parts feature lower saturation voltage (200mV vs 400mV), which represents improved switching performance. CTR specifications are measured at different test currents (5mA for EL3H7 versus 10mA for VOS615A).

Q: Are packaging format differences between Tape & Reel, Tube, and Cut Tape significant for substitution? A: No. Tape & Reel (TR), Tube, and Cut Tape (CT) & Digi-Reel® are different supply formats of the same 4-SOIC physical package. The component itself is identical; packaging format selection depends on assembly process requirements and quantity needs.

Q: Which EL3H7 variant should be selected for optimal performance? A: Selection depends on application requirements. EL3H7(B)(TA)-VG and EL3H7(B)-G offer the highest current transfer ratio (130%-260% @ 5mA), suitable for applications requiring maximum gain. EL3H7(A)(EA)-G and EL3H7(A)-G provide moderate CTR (80%-160% @ 5mA). EL3H7(EA)-VG offers the widest CTR range (50%-600% @ 5mA) for applications with variable input conditions. All variants provide the same 200mV saturation voltage advantage.

Q: Is ROHS3 compliance maintained across all substitute parts? A: Yes. VOS615A-2T, VOS615A-1T, VOS615A-1X001T, and all EL3H7 variants are ROHS3 compliant with MSL 1 rating.

Q: Can EL3H7 parts be substituted in existing designs qualified for VOS615A-2T? A: Electrical substitution is valid based on matching isolation voltage, output characteristics, and package specifications. The improved saturation voltage (200mV vs 400mV) in EL3H7 parts represents enhanced performance. Design validation should confirm that the different current transfer ratio specifications and test conditions (5mA vs 10mA) are compatible with circuit requirements.

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