EL816(S)(C)(TA)-V Optoisolator Equivalent & Substitute Parts

Part Overview

The EL816(S)(C)(TA)-V is a 5000Vrms optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides galvanic isolation for single-channel DC input applications in 4-SMD surface mount packaging. The part 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)	200% @ 5mA
Current Transfer Ratio (Max)	400% @ 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

Substitution of the EL816(S)(C)(TA)-V is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms isolation rating is mandatory for all substitutes.

Channel Configuration: Single-channel operation is required; multi-channel variants are not interchangeable.

Current Transfer Ratio: Minimum 200% and maximum 400% at 5mA input current must be maintained.

Output Specifications: Maximum output voltage of 80V and maximum output current of 50mA per channel define the load-switching capability.

Rise/Fall Time: Switching speed characteristics of 4µs rise and 3µs fall times are critical for timing-sensitive applications.

Package and Mounting: 4-SMD surface mount with gull wing leads is required for PCB compatibility.

Operating Temperature Range: -55°C to 110°C operating range must be supported.

Compliance: ROHS3 compliance and MSL Level 1 are required for manufacturing and environmental standards.

Substitute parts are grouped into two categories: Parametric Equivalents (identical specifications with different manufacturing codes) and Cross-Manufacturer Alternatives (functionally equivalent parts from different manufacturers meeting all electrical and mechanical requirements).

Parameter Comparison

Part Number	Manufacturer	Product Status	Isolation Voltage	CTR Min / Max	Rise / Fall Time	Output Voltage (Max)	Output Current	Vce Saturation (Max)	Operating Temp	Package	Inventory
EL816(S)(C)(TA)-V	Everlight	Discontinued	5000Vrms	200% / 400%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	1008 Pcs
EL816(S)(C)(TD)	Everlight	Active	5000Vrms	200% / 400%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	807 Pcs
EL816(S)(C)(TD)-V	Everlight	Active	5000Vrms	200% / 400%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	649 Pcs
EL816(S)(C)(TU)	Everlight	Active	5000Vrms	200% / 400%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	822 Pcs
EL816(S)(C)(TU)-V	Everlight	Active	5000Vrms	200% / 400%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	951 Pcs
EL816(S1)(C)(TD)	Everlight	Active	5000Vrms	200% / 400%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	827 Pcs
EL816(S1)(C)(TD)-V	Everlight	Active	5000Vrms	200% / 400%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	781 Pcs
EL816(S1)(C)(TU)	Everlight	Active	5000Vrms	200% / 400%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	992 Pcs
EL816(S1)(C)(TU)-V	Everlight	Active	5000Vrms	200% / 400%	4µs, 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	1104 Pcs
EL817(S)(C)(TD)-G	Everlight	Active	5000Vrms	200% / 400%	6µs, 8µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	1004 Pcs
EL817(S)(C)(TD)-VG	Everlight	Active	5000Vrms	200% / 400%	6µs, 8µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	729 Pcs

Engineering Selection Recommendations

Primary Substitutes (Identical Specifications):

The 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), and EL816(S1)(C)(TU)-V are direct parametric equivalents to the EL816(S)(C)(TA)-V. All maintain identical isolation voltage, current transfer ratio, output specifications, and operating temperature range. All substitute parts are active products with confirmed inventory availability. All are ROHS3 compliant with MSL Level 1 rating, meeting manufacturing and environmental requirements.

Secondary Substitutes (Timing Specification Variance):

The EL817(S)(C)(TD)-G and EL817(S)(C)(TD)-VG are functionally equivalent with identical isolation voltage, current transfer ratio, output voltage, output current, and saturation voltage. These parts differ in rise/fall time specifications (6µs rise, 8µs fall versus 4µs rise, 3µs fall). Selection of EL817 variants is appropriate only for applications where the slower switching speed does not impact circuit performance. Both EL817 variants are active products with confirmed inventory.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating. Inventory availability ranges from 649 to 1104 pieces across active variants, ensuring supply continuity. The discontinued status of the original EL816(S)(C)(TA)-V necessitates transition to active alternatives for new procurement and long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can EL816(S)(C)(TD) directly replace EL816(S)(C)(TA)-V without circuit modification?

A: Yes. The EL816(S)(C)(TD) is a parametric equivalent with identical isolation voltage (5000Vrms), current transfer ratio (200%-400% @ 5mA), output specifications (80V max, 50mA max), switching times (4µs rise, 3µs fall), and operating temperature range (-55°C to 110°C). Pin configuration and package (4-SMD, gull wing) are identical. Direct substitution is supported.

Q: What is the difference between EL816 and EL817 variants?

A: The primary difference is switching speed. EL816 variants provide 4µs rise time and 3µs fall time. EL817 variants provide 6µs rise time and 8µs fall time. All other electrical parameters—isolation voltage, current transfer ratio, output voltage, output current, and saturation voltage—are identical. EL817 substitution is appropriate only when circuit timing requirements accommodate the slower switching response.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL Level 1 (unlimited moisture sensitivity) rating, meeting manufacturing and environmental standards equivalent to the original EL816(S)(C)(TA)-V.

Q: What does the "-V" suffix indicate in part numbers?

A: The "-V" suffix appears in multiple part numbers within the substitute list. All "-V" and non-"-V" variants maintain identical electrical specifications and are interchangeable based on the provided parametric data.

Q: Can I use EL816(S1) variants as substitutes for EL816(S) variants?

A: Yes. EL816(S1) and EL816(S) variants maintain identical isolation voltage, current transfer ratio, output specifications, switching times, and operating temperature range. The parametric differences between S and S1 designations do not affect electrical performance or circuit compatibility.

Q: What is the significance of the (TD) and (TU) designations?

A: The (TD) and (TU) designations represent different manufacturing codes or tape/reel configurations from Everlight Electronics. Both maintain identical electrical specifications and are functionally interchangeable. Selection between (TD) and (TU) variants may be based on inventory availability or supply chain preferences.

Q: Are the VO618A variants listed as substitutes compatible with EL816(S)(C)(TA)-V?

A: The VO618A variants are referenced in the substitute field of the original part specification but are not included in the detailed parametric comparison table provided. Compatibility determination for cross-manufacturer alternatives requires complete parametric data verification against all critical specifications including isolation voltage, current transfer ratio, output characteristics, and package configuration.

Q: What inventory levels are available for substitute parts?

A: Active substitute inventory ranges from 649 to 1104 pieces. EL816(S1)(C)(TU)-V has the highest inventory at 1104 pieces. EL816(S)(C)(TD)-V has the lowest inventory at 649 pieces. Inventory levels should be verified at time of procurement to ensure supply continuity.

Q: Is the 4-SMD gull wing package compatible with standard PCB assembly equipment?

A: Yes. The 4-SMD gull wing package is a standard surface mount configuration compatible with automated PCB assembly equipment. All substitute parts maintain identical package geometry and lead configuration, ensuring compatibility with existing PCB designs and assembly processes.

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