EL816(S)(TA) Equivalent & Substitute Parts Reference

Part Overview

The EL816(S)(TA) is a single-channel optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation in 4-SMD surface mount packaging. The EL816(S)(TA) is currently discontinued at DiGi Electronics, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for direct circuit substitution.

Key Parameters

Parameter	Value
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
Rise / Fall Time (Typ)	4µs, 3µs
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

Substitute parts for the EL816(S)(TA) are grouped based on strict parametric equivalence. All identified substitutes maintain identical specifications across the following critical parameters:

Isolation Voltage: 5000Vrms (all substitutes)

Current Transfer Ratio: 50% minimum and 600% maximum at 5mA input (all substitutes)

Output Characteristics: 80V maximum output voltage, 50mA maximum output current per channel (all substitutes)

Input/Output Configuration: Single-channel DC input with transistor output (all substitutes)

Saturation Voltage: 200mV maximum Vce saturation (all substitutes)

Temperature Range: -55°C to 110°C operating temperature (all substitutes)

Package: 4-SMD Gull Wing surface mount configuration (all substitutes)

Compliance: ROHS3 compliant with MSL 1 rating (all substitutes)

The primary distinction among substitutes is product status. The EL816(S)(TA) is discontinued, while all listed substitutes maintain active status with current inventory availability. Rise and fall time specifications show minor variations in the EL817 series (6µs rise, 8µs fall versus 4µs rise, 3µs fall in EL816 variants), which represents a secondary parameter difference.

Parameter Comparison

Part Number	Manufacturer	Product Status	Isolation Voltage	CTR Min / Max	Rise / Fall Time	Output Voltage (Max)	Output Current	Vce Sat (Max)	Temp Range	Package	Inventory
EL816(S)(TA)	Everlight	Discontinued	5000Vrms	50% / 600%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	1005 Pcs
EL816(S)(TD)	Everlight	Active	5000Vrms	50% / 600%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	882 Pcs
EL816(S)(TD)-V	Everlight	Active	5000Vrms	50% / 600%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	828 Pcs
EL816(S)(TU)-V	Everlight	Active	5000Vrms	50% / 600%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	674 Pcs
EL816(S1)(TD)	Everlight	Active	5000Vrms	50% / 600%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	651 Pcs
EL816(S1)(TD)-V	Everlight	Active	5000Vrms	50% / 600%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	691 Pcs
EL816(S1)(TU)	Everlight	Active	5000Vrms	50% / 600%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	836 Pcs
EL816(S1)(TU)-V	Everlight	Active	5000Vrms	50% / 600%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	750 Pcs
EL816S1(I)(TU)-V	Everlight	Active	5000Vrms	50% / 600%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	105600 Pcs
EL817(S)(TD)-G	Everlight	Active	5000Vrms	50% / 600%	6µs, 8µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	1087 Pcs
EL817(S)(TD)-VG	Everlight	Active	5000Vrms	50% / 600%	6µs, 8µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	915 Pcs

Engineering Selection Recommendations

Primary Substitutes (Identical Timing Characteristics):

The 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 parametric equivalents with identical rise and fall time specifications (4µs, 3µs). All maintain active product status and ROHS3 compliance. The EL816S1(I)(TU)-V variant offers the highest inventory availability at 105,600 pieces and is suitable for high-volume applications.

Secondary Substitutes (Slower Timing Response):

The EL817(S)(TD)-G and EL817(S)(TD)-VG variants maintain all electrical parameters identical to the EL816(S)(TA) with the exception of rise and fall time specifications (6µs rise, 8µs fall versus 4µs rise, 3µs fall). These substitutes are appropriate for applications where timing response is not a critical constraint and where the slower switching characteristics do not impact circuit performance.

Compliance and Certification:

All identified substitutes maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) ratings consistent with the original EL816(S)(TA) specification. All substitutes are manufactured by Everlight Electronics Co Ltd, ensuring consistency in manufacturing standards and quality control processes.

Frequently Asked Questions (FAQ)

Q: Can EL816(S)(TD) directly replace EL816(S)(TA) in existing circuit designs?

A: Yes. The EL816(S)(TD) maintains identical electrical specifications including isolation voltage (5000Vrms), current transfer ratio (50-600% @ 5mA), output voltage (80V max), output current (50mA), saturation voltage (200mV), temperature range (-55°C to 110°C), and package configuration (4-SMD Gull Wing). Direct substitution is supported without circuit modification.

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

A: The EL816 and EL817 series differ in rise and fall time specifications. EL816 variants exhibit 4µs rise time and 3µs fall time, while EL817 variants exhibit 6µs rise time and 8µs fall time. All other electrical parameters remain identical. Selection between series depends on circuit timing requirements.

Q: Why does EL816S1(I)(TU)-V show significantly higher inventory than other variants?

A: The EL816S1(I)(TU)-V is supplied in Tape & Reel (TR) packaging format, which is standard for high-volume manufacturing and automated assembly processes. This packaging format typically maintains larger inventory levels compared to alternative packaging configurations.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitutes maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity ratings, consistent with the original EL816(S)(TA) specification.

Q: Can EL817 variants be used in applications requiring EL816 timing specifications?

A: EL817 variants have slower switching characteristics (6µs rise, 8µs fall) compared to EL816 variants (4µs rise, 3µs fall). Substitution is only appropriate if circuit design tolerates the slower response time. Applications with strict timing requirements should use EL816 series variants.

Q: What packaging options are available among the substitutes?

A: All substitutes utilize 4-SMD Gull Wing surface mount packaging, identical to the original EL816(S)(TA). The EL816S1(I)(TU)-V is supplied in Tape & Reel format for automated assembly, while other variants are supplied in standard packaging configurations.

Q: Is the EL816(S)(TA) still available for purchase?

A: The EL816(S)(TA) is discontinued at DiGi Electronics. However, 1005 pieces remain in stock from existing inventory. For new designs and ongoing production, active substitutes such as EL816(S)(TD), EL816(S)(TU)-V, or EL816S1(I)(TU)-V are recommended to ensure long-term supply chain continuity.

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