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

Part Overview

The EL817(S)(C)(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 main 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
Voltage - Isolation	5000Vrms
Number of Channels	1
Current Transfer Ratio (Min)	200% @ 5mA
Current Transfer Ratio (Max)	400% @ 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)

Substitute Part Grouping Explanation

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

Mandatory Matching Parameters:

Voltage - Isolation: 5000Vrms
Number of Channels: 1
Current Transfer Ratio: 200% (Min) @ 5mA and 400% (Max) @ 5mA
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)

Variable Parameters (Non-Critical for Substitution):

Rise / Fall Time: EL817 series exhibits 6µs, 8µs; EL816 series exhibits 4µs, 3µs
Product Status: Main part is discontinued; active substitutes are available
Packaging suffix designations (TD, TU, etc.)

All substitute parts listed maintain full electrical and mechanical compatibility with the main part across all mandatory parameters. The EL816 series variants provide faster switching characteristics while maintaining all other specifications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Isolation	Channels	CTR Min @ 5mA	CTR Max @ 5mA	Rise/Fall Time (µs)	Output Voltage Max	Output Current	Vce Sat (Max)	Temp Range	Package	Status	Inventory
EL817(S)(C)(TB)-VG	Everlight	5000Vrms	1	200%	400%	6, 8	80V	50mA	200mV	-55 to 110°C	4-SMD	Discontinued	1030 Pcs
EL816(S)(C)(TD)	Everlight	5000Vrms	1	200%	400%	4, 3	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	807 Pcs
EL816(S)(C)(TD)-V	Everlight	5000Vrms	1	200%	400%	4, 3	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	649 Pcs
EL816(S)(C)(TU)	Everlight	5000Vrms	1	200%	400%	4, 3	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	822 Pcs
EL816(S)(C)(TU)-V	Everlight	5000Vrms	1	200%	400%	4, 3	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	951 Pcs
EL816(S1)(C)(TD)	Everlight	5000Vrms	1	200%	400%	4, 3	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	827 Pcs
EL816(S1)(C)(TD)-V	Everlight	5000Vrms	1	200%	400%	4, 3	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	781 Pcs
EL816(S1)(C)(TU)	Everlight	5000Vrms	1	200%	400%	4, 3	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	992 Pcs
EL816(S1)(C)(TU)-V	Everlight	5000Vrms	1	200%	400%	4, 3	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	1104 Pcs
EL817(S)(C)(TD)-G	Everlight	5000Vrms	1	200%	400%	6, 8	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	1004 Pcs
EL817(S)(C)(TD)-VG	Everlight	5000Vrms	1	200%	400%	6, 8	80V	50mA	200mV	-55 to 110°C	4-SMD	Active	729 Pcs

Engineering Selection Recommendations

Primary Substitutes (Identical Switching Characteristics):

EL817(S)(C)(TD)-G and EL817(S)(C)(TD)-VG are the preferred direct replacements for the discontinued EL817(S)(C)(TB)-VG. Both maintain identical rise/fall time specifications (6µs, 8µs) and are currently active products with confirmed inventory availability. These variants differ only in packaging suffix designations and are ROHS3 compliant with MSL 1 rating.

Secondary Substitutes (Faster Switching Performance):

The EL816 series (all variants: EL816(S)(C)(TD), EL816(S)(C)(TD)-V, EL816(S)(C)(TU), EL816(S)(C)(TU)-V, EL816(S1)(C)(TD), EL816(S1)(C)(TD)-V, EL816(S1)(C)(TU), EL816(S1)(C)(TU)-V) provide complete electrical and mechanical compatibility with improved switching performance. Rise/fall times are reduced to 4µs and 3µs respectively, compared to the main part's 6µs and 8µs. All EL816 variants are active products with robust inventory levels ranging from 781 to 1104 pieces. Selection among EL816 variants depends on specific packaging and tape/reel requirements indicated by suffix designations (TD vs. TU, with or without -V suffix).

Compliance Verification:

All substitute parts maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) ratings, ensuring compatibility with standard manufacturing and storage protocols. ECCN and HTSUS classifications remain consistent across all variants.

Frequently Asked Questions (FAQ)

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

A: Yes. All EL816 variants maintain identical electrical specifications for isolation voltage, current transfer ratio, output voltage, output current, saturation voltage, and operating temperature range. The primary difference is faster switching response (4µs/3µs versus 6µs/8µs). Applications tolerant of faster switching characteristics can use EL816 substitutes without circuit modification.

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

A: Both series provide 5000Vrms isolation with single-channel transistor output in 4-SMD packages. The EL817 series exhibits slower switching times (6µs rise, 8µs fall), while EL816 series provides faster switching (4µs rise, 3µs fall). All other electrical and mechanical parameters are identical.

Q: Are packaging suffix designations (TD, TU, -V, -G, -VG) interchangeable?

A: Suffix designations indicate specific packaging, tape configuration, and reel specifications. While electrically equivalent, physical packaging differs. Verify tape/reel requirements and component orientation with your procurement specification before substitution.

Q: Why is the main part EL817(S)(C)(TB)-VG discontinued?

A: Product discontinuation is determined by manufacturer production decisions. Active alternatives with identical specifications are available in the EL817 and EL816 series.

Q: What inventory levels are available for substitute parts?

A: EL816(S1)(C)(TU)-V offers the highest inventory at 1104 pieces. EL817(S)(C)(TD)-VG provides 729 pieces. All listed substitutes maintain active status with confirmed stock availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 rating, consistent with the main part specifications.

Q: Can I use EL816 parts in applications requiring the exact switching speed of EL817?

A: No. Applications with timing-critical circuits dependent on 6µs/8µs switching characteristics must use EL817 series variants. EL816 series faster switching (4µs/3µs) may cause timing violations in such designs.

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