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

Part Overview

The EL817(S)(D)(TB)-VG is a 5000Vrms isolation optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent alternatives for ongoing design requirements and procurement needs. The part operates as a single-channel optoisolator in a 4-SMD surface mount package, suitable for DC input applications requiring high-voltage isolation in industrial and consumer electronics.

Key Parameters

Parameter	Value
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	300% @ 5mA
Current Transfer Ratio (Max)	600% @ 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)	60 mA
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)

Substitute Part Grouping Explanation

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

Isolation Voltage: 5000Vrms (mandatory match)

Channel Configuration: Single channel (mandatory match)

Output Type: Transistor output (mandatory match)

Current Transfer Ratio: 300% minimum and 600% maximum @ 5mA (mandatory match)

Package Type: 4-SMD, Gull Wing surface mount (mandatory match)

Input Type: DC (mandatory match)

Output Specifications: 80V maximum output voltage, 50mA maximum output current per channel (mandatory match)

Electrical Characteristics: 1.2V typical forward voltage, 60mA maximum DC forward current, 200mV maximum Vce saturation (mandatory match)

Operating Temperature Range: -55°C to 110°C (mandatory match)

Compliance: ROHS3 compliant, MSL Level 1 (mandatory match)

Substitute parts from Everlight Electronics Co Ltd within the EL816 and EL817 series meet these criteria. The primary distinction between EL816 and EL817 variants is rise/fall time performance: EL816 series exhibits 4µs rise and 3µs fall times, while EL817 series exhibits 6µs rise and 8µs fall times. Both meet the electrical and mechanical requirements for direct substitution.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	Channels	CTR Min @ 5mA	CTR Max @ 5mA	Rise/Fall Time (µs)	Output Voltage Max	Output Current	Package	Product Status	Inventory
EL817(S)(D)(TB)-VG	Everlight	5000Vrms	1	300%	600%	6, 8	80V	50mA	4-SMD	Discontinued	814 Pcs
EL816(S)(D)(TD)	Everlight	5000Vrms	1	300%	600%	4, 3	80V	50mA	4-SMD	Active	1010 Pcs
EL816(S)(D)(TD)-V	Everlight	5000Vrms	1	300%	600%	4, 3	80V	50mA	4-SMD	Active	962 Pcs
EL816(S)(D)(TU)	Everlight	5000Vrms	1	300%	600%	4, 3	80V	50mA	4-SMD	Active	909 Pcs
EL816(S)(D)(TU)-V	Everlight	5000Vrms	1	300%	600%	4, 3	80V	50mA	4-SMD	Active	634 Pcs
EL816(S1)(D)(TD)	Everlight	5000Vrms	1	300%	600%	4, 3	80V	50mA	4-SMD	Active	1001 Pcs
EL816(S1)(D)(TD)-V	Everlight	5000Vrms	1	300%	600%	4, 3	80V	50mA	4-SMD	Active	959 Pcs
EL816(S1)(D)(TU)	Everlight	5000Vrms	1	300%	600%	4, 3	80V	50mA	4-SMD	Active	671 Pcs
EL816(S1)(D)(TU)-V	Everlight	5000Vrms	1	300%	600%	4, 3	80V	50mA	4-SMD	Active	756 Pcs
EL817(S)(D)(TD)-G	Everlight	5000Vrms	1	300%	600%	6, 8	80V	50mA	4-SMD	Active	815 Pcs
EL817(S)(D)(TD)-VG	Everlight	5000Vrms	1	300%	600%	6, 8	80V	50mA	4-SMD	Active	1065 Pcs

Engineering Selection Recommendations

Primary Recommendation: EL817(S)(D)(TD)-VG

This part maintains identical electrical and mechanical specifications to the discontinued EL817(S)(D)(TB)-VG, including matching rise/fall time characteristics (6µs, 8µs). Product status is active with 1065 pieces in inventory. ROHS3 compliance and MSL Level 1 rating are maintained. This represents a direct functional equivalent requiring no circuit redesign.

Secondary Recommendation: EL817(S)(D)(TD)-G

This variant shares all electrical specifications and rise/fall time performance with the primary recommendation. Product status is active with 815 pieces in inventory. ROHS3 compliance and MSL Level 1 rating are maintained. Selection between this and the primary recommendation depends on packaging or supply chain requirements specific to the "-G" versus "-VG" suffix designation.

Alternative Group: EL816 Series (EL816(S)(D)(TD), EL816(S)(D)(TD)-V, EL816(S)(D)(TU), EL816(S)(D)(TU)-V, EL816(S1)(D)(TD), EL816(S1)(D)(TD)-V, EL816(S1)(D)(TU), EL816(S1)(D)(TU)-V)

All EL816 variants maintain identical isolation voltage, channel count, current transfer ratio, output specifications, and compliance ratings. The distinction is faster switching performance: 4µs rise time and 3µs fall time compared to the original 6µs and 8µs. All variants are active with inventory ranging from 634 to 1010 pieces. Selection of EL816 series is appropriate for applications where faster switching response provides design benefit or where supply availability of EL817 variants is constrained.

Frequently Asked Questions (FAQ)

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

A: Yes. EL816 variants are electrically equivalent across all critical parameters: 5000Vrms isolation, single channel, transistor output, 300-600% current transfer ratio, 80V maximum output, 50mA output current, 1.2V forward voltage, 200mV Vce saturation, -55°C to 110°C operating range, 4-SMD package, ROHS3 compliance, and MSL Level 1. The primary difference is switching speed: EL816 exhibits 4µs rise and 3µs fall times versus the original 6µs and 8µs. This faster response is a performance enhancement, not a limitation.

Q: What is the difference between EL817(S)(D)(TD)-VG and EL817(S)(D)(TD)-G?

A: Both parts are electrically identical with matching 6µs rise and 8µs fall time characteristics. The suffix difference ("-VG" versus "-G") relates to packaging or supply chain designation. Both are active products with adequate inventory. Selection between them depends on specific procurement or packaging requirements.

Q: Are there differences between EL816(S) and EL816(S1) variants?

A: The provided data indicates both (S) and (S1) designations within the EL816 series maintain identical electrical specifications, isolation voltage, current transfer ratio, output characteristics, operating temperature range, package type, and compliance ratings. Selection between these variants depends on specific design or supply requirements not differentiated in the electrical parameters.

Q: What does the "(TD)" versus "(TU)" designation indicate?

A: Both designations appear in active EL816 variants with identical electrical specifications. The distinction relates to packaging or lead configuration details. Both are functionally equivalent for circuit substitution purposes.

Q: Is the 4-SMD Gull Wing package compatible with my PCB design?

A: The EL817(S)(D)(TB)-VG and all recommended substitutes use identical 4-SMD Gull Wing surface mount packaging. PCB footprints and reflow profiles remain unchanged. No layout modifications are required.

Q: What compliance certifications apply to substitute parts?

A: All recommended substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original part. ECCN classification remains EAR99 and HTSUS code remains 8541.49.8000 across all variants.

Q: Why is the original EL817(S)(D)(TB)-VG discontinued?

A: The provided data indicates discontinuation at DiGi Electronics. Active equivalent alternatives from Everlight Electronics Co Ltd are available in the EL817 and EL816 series with superior or equivalent performance characteristics and current inventory availability.

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