EL817(S)(B)(TA)-VG Equivalent & Substitute Parts

Part Overview

The EL817(S)(B)(TA)-VG is a 5000Vrms 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. The part functions as a single-channel optoisolator in 4-SMD surface mount packaging, suitable for applications requiring high-voltage isolation with DC input and transistor output configuration. Current inventory of 771 pieces remains available as new original stock.

Key Parameters

Parameter	Value
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	130% @ 5mA
Current Transfer Ratio (Max)	260% @ 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 eligibility for the EL817(S)(B)(TA)-VG is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Number of Channels: 1
Voltage - Isolation: 5000Vrms
Current Transfer Ratio (Min): 130% @ 5mA
Current Transfer Ratio (Max): 260% @ 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)

Allowable Variation: Rise / Fall Time specifications may vary within the EL816 and EL817 series. The EL816 series exhibits faster switching characteristics (4µs, 3µs) compared to the EL817 series (6µs, 8µs). This variation is acceptable for substitution purposes as both meet the functional requirements of the optoisolator category.

Product Status Consideration: The main part EL817(S)(B)(TA)-VG is discontinued. All identified substitutes maintain active product status with Everlight Electronics Co Ltd, ensuring ongoing availability and supply chain continuity.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	CTR Min / Max	Rise / Fall Time	Output Voltage (Max)	Output Current	Vce Sat (Max)	Temp Range	Package	Product Status	Inventory
EL817(S)(B)(TA)-VG	Everlight	5000Vrms	130% / 260%	6µs, 8µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Discontinued	771 Pcs
EL816(S)(B)(TD)	Everlight	5000Vrms	130% / 260%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	822 Pcs
EL816(S)(B)(TD)-V	Everlight	5000Vrms	130% / 260%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	983 Pcs
EL816(S)(B)(TU)	Everlight	5000Vrms	130% / 260%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	1002 Pcs
EL816(S)(B)(TU)-V	Everlight	5000Vrms	130% / 260%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	1043 Pcs
EL816(S1)(B)(TD)	Everlight	5000Vrms	130% / 260%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	1009 Pcs
EL816(S1)(B)(TD)-V	Everlight	5000Vrms	130% / 260%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	886 Pcs
EL816(S1)(B)(TU)	Everlight	5000Vrms	130% / 260%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	897 Pcs
EL816(S1)(B)(TU)-V	Everlight	5000Vrms	130% / 260%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	972 Pcs
EL816S1(B)(TU)-F	Everlight	5000Vrms	130% / 260%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	275200 Pcs
EL817(S)(B)(TD)-G	Everlight	5000Vrms	130% / 260%	6µs, 8µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	1117 Pcs

Engineering Selection Recommendations

Primary Substitutes (EL817 Series - Identical Switching Characteristics):

EL817(S)(B)(TD)-G is the direct functional equivalent of EL817(S)(B)(TA)-VG. Both parts maintain identical rise/fall time specifications (6µs, 8µs) and are manufactured by Everlight Electronics Co Ltd. EL817(S)(B)(TD)-G holds active product status with 1117 pieces in inventory, providing supply continuity for applications where the original part is no longer available.

Secondary Substitutes (EL816 Series - Faster Switching Performance):

The EL816 series optoisolators provide equivalent electrical performance across all critical parameters with the exception of switching speed. EL816 variants exhibit faster rise/fall times (4µs, 3µs) compared to the EL817 series. This faster switching characteristic is a performance enhancement rather than a limitation. Applications tolerant of faster switching transients can utilize EL816 series parts without functional degradation.

Recommended Selection Hierarchy:

EL817(S)(B)(TD)-G: Direct equivalent with identical switching characteristics
EL816(S1)(B)(TU)-F: Highest inventory availability (275200 pieces) with faster switching performance
EL816(S)(B)(TU) or EL816(S)(B)(TU)-V: Active status with substantial inventory (1002-1043 pieces)

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original part specifications.

Frequently Asked Questions (FAQ)

Q: Can EL816 series parts replace EL817(S)(B)(TA)-VG in existing designs?

A: Yes. EL816 series optoisolators meet all critical electrical parameters including isolation voltage (5000Vrms), current transfer ratio (130%-260% @ 5mA), output voltage (80V max), and output current (50mA). The primary difference is faster switching performance (4µs, 3µs rise/fall time versus 6µs, 8µs). Applications can accommodate this performance enhancement without circuit modification.

Q: What is the significance of the part number suffixes (TD, TU, -V, -G, -F)?

A: Part number suffixes denote manufacturing date codes, temperature grade designations, and packaging configurations. All variants listed maintain identical electrical specifications and functional performance. Suffix variations do not affect substitution eligibility when core parameters match.

Q: Is EL816S1(B)(TU)-F suitable for high-volume production?

A: Yes. EL816S1(B)(TU)-F is supplied in Tape & Reel (TR) packaging with 275200 pieces in inventory, making it optimal for high-volume manufacturing. This part maintains all required electrical specifications and ROHS3 compliance.

Q: Are there any thermal or reliability differences between EL817 and EL816 series?

A: Both series operate across the identical temperature range (-55°C ~ 110°C) and maintain equivalent Vce saturation characteristics (200mV max). No thermal or reliability degradation occurs when substituting EL816 for EL817 variants.

Q: Can I mix EL816 and EL817 parts in the same production batch?

A: Yes, provided circuit design accommodates the faster switching characteristics of EL816 series. Both series are manufactured by Everlight Electronics Co Ltd and maintain identical isolation voltage, current transfer ratio, output specifications, and compliance certifications.

Q: What packaging considerations apply to these substitutes?

A: All listed substitutes utilize 4-SMD Gull Wing surface mount packaging, matching the original EL817(S)(B)(TA)-VG configuration. No PCB layout or assembly process modifications are required for substitution.

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