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

Part Overview

The EL817(S)(TB)-VG is a 5000Vrms optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This single-channel device is designed for DC input applications requiring galvanic isolation in 4-SMD surface mount packages. The part is currently discontinued at DiGi Electronics, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for direct component substitution in existing designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	EL817(S)(TB)-VG
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA
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
Input Type	DC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitute parts for the EL817(S)(TB)-VG are identified based on strict electrical and mechanical parameter matching. The critical parameters determining substitution eligibility are:

Electrical Parameters:

Voltage - Isolation: 5000Vrms (mandatory match)
Number of Channels: 1 (mandatory match)
Output Type: Transistor (mandatory match)
Voltage - Output (Max): 80V (mandatory match)
Current - Output / Channel: 50mA (mandatory match)
Current Transfer Ratio range: 50% to 600% @ 5mA (mandatory match)
Vce Saturation (Max): 200mV (mandatory match)
Operating Temperature: -55°C ~ 110°C (mandatory match)
Input Type: DC (mandatory match)

Mechanical Parameters:

Mounting Type: Surface Mount (mandatory match)
Package / Case: 4-SMD, Gull Wing (mandatory match)

Compliance Parameters:

RoHS Status: ROHS3 Compliant (mandatory match)
Moisture Sensitivity Level: 1 (Unlimited) (mandatory match)

All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Variations in Rise/Fall Time (6µs/8µs for EL817 series versus 4µs/3µs for EL816 series) do not disqualify substitution as these parameters are not specified as critical differentiators in the original part definition. Product status prioritizes active parts over discontinued alternatives.

Parameter Comparison

Parameter	EL817(S)(TB)-VG	EL816(S)(TD)	EL816(S)(TD)-V	EL816(S)(TU)-V	EL816(S1)(TD)	EL816(S1)(TD)-V	EL816(S1)(TU)	EL816(S1)(TU)-V	EL816S1(I)(TU)-V	EL817(S)(TD)-G	EL817(S)(TD)-VG
Manufacturer	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA
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
Input Type	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Inventory Status	942 Pcs	882 Pcs	828 Pcs	674 Pcs	651 Pcs	691 Pcs	836 Pcs	750 Pcs	105600 Pcs	1087 Pcs	915 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain complete electrical and mechanical equivalence to the EL817(S)(TB)-VG. Selection among active alternatives should prioritize the following criteria:

Product Status Priority: All substitute parts listed are in active production status, ensuring long-term availability and supply chain stability compared to the discontinued EL817(S)(TB)-VG.

Compliance and Certification: Parts EL816(S)(TD), EL816(S)(TD)-V, EL816(S)(TU)-V, EL816(S1)(TD), EL816(S1)(TD)-V, EL816(S1)(TU), EL816(S1)(TU)-V, EL817(S)(TD)-G, and EL817(S)(TD)-VG all maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, meeting regulatory requirements for industrial and commercial applications.

Inventory Availability: EL816S1(I)(TU)-V offers the highest inventory level at 105,600 pieces, providing maximum supply security. EL817(S)(TD)-G and EL817(S)(TD)-VG maintain inventory above 900 pieces, supporting standard procurement volumes.

Packaging Considerations: EL816S1(I)(TU)-V is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. All other alternatives are available in standard packaging configurations compatible with manual and semi-automated placement equipment.

Timing Characteristics: EL816 series variants exhibit faster rise/fall times (4µs/3µs) compared to EL817 series variants (6µs/8µs). For applications with timing-critical signal processing requirements, EL816 series substitutes provide improved switching performance. For applications without timing constraints, both series are functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can EL816 series parts directly replace EL817(S)(TB)-VG in existing PCB designs?

A: Yes. EL816 series parts including EL816(S)(TD), EL816(S)(TD)-V, EL816(S)(TU)-V, EL816(S1)(TD), EL816(S1)(TD)-V, EL816(S1)(TU), and EL816(S1)(TU)-V are direct pin-compatible substitutes. All maintain identical 4-SMD Gull Wing package geometry, electrical specifications, and operating parameters. No PCB layout modifications are required.

Q: What is the difference between EL816 and EL817 series optoisolators?

A: Both series maintain identical electrical specifications including 5000Vrms isolation voltage, 50-600% current transfer ratio, 80V maximum output voltage, and 50mA output current. The primary difference is rise/fall time performance: EL816 series operates at 4µs/3µs while EL817 series operates at 6µs/8µs. This timing difference does not affect functional compatibility for DC input applications without high-frequency switching requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts except EL816S1(I)(TU)-V are explicitly specified as ROHS3 compliant. EL816S1(I)(TU)-V does not specify RoHS status in the provided data but is manufactured by Everlight Electronics Co Ltd under the same product family standards.

Q: What is the significance of the suffix designations (TD, TU, S, S1, I, V, G, VG)?

A: Suffix designations indicate packaging, lead configuration, and performance grade variations within the EL816 and EL817 product families. TD and TU designate different tape configurations for reel packaging. S and S1 indicate different internal circuit configurations. V and G designations specify voltage rating variants. I designates industrial-grade specifications. These variations do not affect electrical equivalence for the specified parameters.

Q: Which substitute part offers the best inventory availability?

A: EL816S1(I)(TU)-V provides the highest inventory level at 105,600 pieces in Tape & Reel packaging, ensuring maximum supply availability for high-volume production requirements.

Q: Can EL817(S)(TD)-VG be used as a substitute for EL817(S)(TB)-VG?

A: Yes. EL817(S)(TD)-VG is an active equivalent with identical electrical and mechanical specifications. The primary advantage is active product status compared to the discontinued EL817(S)(TB)-VG, ensuring continued availability and supply chain support.

Q: What packaging options are available for substitute parts?

A: Most substitute parts are available in standard packaging configurations. EL816S1(I)(TU)-V is specifically supplied in Tape & Reel (TR) format for automated assembly. Other variants support both manual and semi-automated placement processes. Verify packaging requirements with your procurement specification before component selection.

Q: Are there any thermal or environmental performance differences between substitute parts?

A: All substitute parts maintain identical operating temperature range of -55°C to 110°C and MSL Level 1 (Unlimited) moisture sensitivity rating. No thermal or environmental performance differences exist among the listed alternatives.

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