EL817(S)(A)(TB)-VG Equivalent & Substitute Parts

Part Overview

The EL817(S)(A)(TB)-VG is a 5000Vrms optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This single-channel device is configured in a 4-SMD surface mount package with gull wing leads. The part is currently discontinued at DiGi Electronics, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	EL817(S)(A)(TB)-VG
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	80% @ 5mA
Current Transfer Ratio (Max)	160% @ 5mA
Rise / Fall Time (Typ)	6µs, 8µs
Input Type	DC
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Voltage - Forward (Vf) (Typ)	1.2V
Current - DC Forward (If) (Max)	60mA
Vce Saturation (Max)	200mV
Operating Temperature	-55°C ~ 110°C
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution of the EL817(S)(A)(TB)-VG is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Voltage - Isolation: 5000Vrms
Number of Channels: 1
Output Type: Transistor
Input Type: DC
Current Transfer Ratio (Min): 80% @ 5mA
Current Transfer Ratio (Max): 160% @ 5mA
Voltage - Output (Max): 80V
Current - Output / Channel: 50mA
Voltage - Forward (Vf) (Typ): 1.2V
Current - DC Forward (If) (Max): 60mA
Vce Saturation (Max): 200mV
Operating Temperature: -55°C ~ 110°C
Mounting Type: Surface Mount
Package / Case: 4-SMD, Gull Wing
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Variable Parameters (Non-Critical for Substitution):

Rise / Fall Time: EL817 series specifies 6µs, 8µs; EL816 series specifies 4µs, 3µs (faster response)
Packaging designation: Various tape & reel and tube configurations available

All substitute parts listed maintain full electrical and mechanical compatibility with the discontinued EL817(S)(A)(TB)-VG across all mandatory parameters. The EL816 series variants offer improved rise and fall time performance while maintaining identical isolation voltage, current transfer ratio, output voltage, and saturation characteristics.

Parameter Comparison

Parameter	EL817(S)(A)(TB)-VG	EL816(S)(A)(TD)	EL816(S)(A)(TD)-V	EL816(S)(A)(TU)	EL816(S)(A)(TU)-V	EL816(S1)(A)(TD)	EL816(S1)(A)(TD)-V	EL816(S1)(A)(TU)	EL816(S1)(A)(TU)-V	EL816S2(A)(TU)-V	EL817(S)(A)(TD)-G
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Current Transfer Ratio (Min)	80% @ 5mA	80% @ 5mA	80% @ 5mA	80% @ 5mA	80% @ 5mA	80% @ 5mA	80% @ 5mA	80% @ 5mA	80% @ 5mA	80% @ 5mA	80% @ 5mA
Current Transfer Ratio (Max)	160% @ 5mA	160% @ 5mA	160% @ 5mA	160% @ 5mA	160% @ 5mA	160% @ 5mA	160% @ 5mA	160% @ 5mA	160% @ 5mA	160% @ 5mA	160% @ 5mA
Rise / Fall Time (Typ)	6µs, 8µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	6µs, 8µs
Input Type	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V	80V	80V	80V	80V	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V
Current - DC Forward (If) (Max)	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA
Vce Saturation (Max)	200mV	200mV	200mV	200mV	200mV	200mV	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	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	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	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Identical Rise/Fall Time Profile):

The EL817(S)(A)(TD)-G maintains the original EL817 series rise and fall time specification of 6µs and 8µs respectively, providing the closest functional match to the discontinued EL817(S)(A)(TB)-VG. This part is currently active and ROHS3 compliant with MSL 1 rating. Selection of EL817(S)(A)(TD)-G is appropriate for applications where timing characteristics must remain unchanged from the original design.

Secondary Substitutes (Improved Rise/Fall Time Performance):

The EL816 series variants (EL816(S)(A)(TD), EL816(S)(A)(TD)-V, EL816(S)(A)(TU), EL816(S)(A)(TU)-V, EL816(S1)(A)(TD), EL816(S1)(A)(TD)-V, EL816(S1)(A)(TU), and EL816(S1)(A)(TU)-V) all feature faster rise and fall times of 4µs and 3µs respectively. These parts are currently active with ROHS3 compliance and MSL 1 ratings. The EL816 series substitutes are electrically equivalent across all isolation voltage, current transfer ratio, output voltage, and saturation parameters. The improved timing performance of EL816 variants does not degrade circuit functionality and may enhance system response characteristics in timing-sensitive applications.

Tertiary Substitute (Packaging Variant):

The EL816S2(A)(TU)-V is supplied in Tape & Reel packaging and maintains electrical equivalence across all critical parameters. RoHS and MSL compliance information is not specified for this variant; confirmation of compliance requirements is necessary before selection for regulated applications.

All listed substitutes are manufactured by Everlight Electronics Co Ltd and maintain the 4-SMD gull wing surface mount package configuration, ensuring direct PCB footprint compatibility with the original EL817(S)(A)(TB)-VG design.

Frequently Asked Questions (FAQ)

Q: Can EL816 series parts directly replace the discontinued EL817(S)(A)(TB)-VG?

A: Yes. The EL816 series variants listed maintain full electrical equivalence across isolation voltage (5000Vrms), current transfer ratio (80-160% @ 5mA), output voltage (80V max), output current (50mA), forward voltage (1.2V), and saturation voltage (200mV). All parts share identical operating temperature range (-55°C to 110°C), surface mount configuration, and 4-SMD gull wing package. The primary difference is improved rise and fall time performance (4µs/3µs versus 6µs/8µs), which does not prevent substitution.

Q: What is the difference between EL816(S)(A)(TD) and EL816(S)(A)(TU) variants?

A: Both variants maintain identical electrical parameters and are functionally equivalent. The designation difference reflects packaging or tape configuration variants. Selection between these parts should be based on procurement and assembly process requirements rather than electrical performance.

Q: Are the EL816(S1) variants different from EL816(S) variants?

A: The EL816(S1) and EL816(S) variants maintain identical electrical specifications across all critical parameters including isolation voltage, current transfer ratio, output characteristics, and operating temperature. The designation difference does not indicate functional variation. Both are suitable substitutes for the original EL817(S)(A)(TB)-VG.

Q: Does the faster rise/fall time of EL816 parts affect circuit compatibility?

A: The EL816 series rise and fall times of 4µs and 3µs are faster than the original EL817 specification of 6µs and 8µs. Faster switching response does not degrade circuit functionality and may improve system performance in timing-sensitive applications. No circuit modification is required for substitution.

Q: What is the significance of the "-V" suffix in part numbers?

A: The "-V" suffix indicates a packaging or specification variant. Parts with and without the "-V" designation maintain identical electrical parameters and are functionally equivalent. Selection should be based on specific procurement or assembly requirements.

Q: Is the EL816S2(A)(TU)-V suitable for applications requiring RoHS3 compliance?

A: RoHS3 compliance status is not specified in the available data for EL816S2(A)(TU)-V. Confirmation of compliance certification is required before selection for regulated applications. The other listed EL816 and EL817 variants are confirmed ROHS3 compliant.

Q: Can I use EL817(S)(A)(TD)-G as a direct replacement for EL817(S)(A)(TB)-VG?

A: Yes. The EL817(S)(A)(TD)-G maintains identical electrical specifications and rise/fall time characteristics (6µs, 8µs) as the original part. It is currently active, ROHS3 compliant, and MSL 1 rated. This part provides the closest functional match to the discontinued EL817(S)(A)(TB)-VG.

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

A: All listed substitutes are supplied in 4-SMD surface mount packages with gull wing leads, ensuring PCB footprint compatibility. Specific tape & reel, tube, or bulk packaging options vary by part number variant. Procurement should confirm packaging format availability for assembly process requirements.

Q: What inventory levels are available for substitute parts?

A: Current inventory levels for substitute parts range from 756 to 1063 pieces across the listed variants. Specific availability should be confirmed with the supplier for production requirements.

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