EL815(S)(TA) Optoisolator Equivalent & Substitute Parts

Part Overview

The EL815(S)(TA) is a 5000Vrms isolation optoisolator with Darlington output manufactured by Everlight Electronics Co Ltd. This component is designed for single-channel DC input applications requiring high-voltage isolation in 4-SMD surface mount packaging. The EL815(S)(TA) is currently discontinued at DiGi Electronics, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	600% @ 1mA
Current Transfer Ratio (Max)	7500% @ 1mA
Output Type	Darlington
Voltage - Output (Max)	35V
Current - Output / Channel	80mA
Rise / Fall Time (Typ)	60µs, 53µs
Vce Saturation (Max)	1V
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 EL815(S)(TA) is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Voltage isolation rating: 5000Vrms
Current transfer ratio range: 600% to 7500% @ 1mA
Output type: Darlington configuration
Maximum output voltage: 35V
Maximum output current per channel: 80mA
Vce saturation: 1V maximum
Rise/fall time: 60µs and 53µs

Mechanical Equivalence Criteria:

Single channel configuration
4-SMD surface mount package with gull wing leads
DC input type
Moisture sensitivity level: 1 (Unlimited)

Compliance Criteria:

ROHS3 compliance required
ECCN: EAR99
HTSUS: 8541.49.8000

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical and mechanical specifications from Everlight Electronics) and Similar Equivalents (alternative manufacturer parts meeting all electrical and mechanical criteria).

Parameter Comparison

Part Number	Manufacturer	Product Status	Isolation Voltage	CTR Min / Max	Output Current	Vce Sat (Max)	Temp Range	Package	Inventory
EL815(S)(TA)	Everlight	Discontinued	5000Vrms	600% / 7500%	80mA	1V	-55°C ~ 110°C	4-SMD	714 Pcs
EL815(S)(TD)	Everlight	Active	5000Vrms	600% / 7500%	80mA	1V	-55°C ~ 110°C	4-SMD	1145 Pcs
EL815(S)(TD)-V	Everlight	Active	5000Vrms	600% / 7500%	80mA	1V	-55°C ~ 110°C	4-SMD	977 Pcs
EL815(S)(TU)	Everlight	Active	5000Vrms	600% / 7500%	80mA	1V	-55°C ~ 110°C	4-SMD	863 Pcs
EL815(S)(TU)-V	Everlight	Active	5000Vrms	600% / 7500%	80mA	1V	-55°C ~ 110°C	4-SMD	844 Pcs
EL815(S1)(TD)	Everlight	Active	5000Vrms	600% / 7500%	80mA	1V	-55°C ~ 110°C	4-SMD	1134 Pcs
EL815(S1)(TD)-V	Everlight	Active	5000Vrms	600% / 7500%	80mA	1V	-55°C ~ 110°C	4-SMD	734 Pcs
EL815(S1)(TU)	Everlight	Active	5000Vrms	600% / 7500%	80mA	1V	-55°C ~ 110°C	4-SMD	1139 Pcs
EL815(S1)(TU)-V	Everlight	Active	5000Vrms	600% / 7500%	80mA	1V	-55°C ~ 110°C	4-SMD	989 Pcs
LTV-815S	Lite-On Inc.	Active	5000Vrms	600% / 7500%	80mA	1V	-30°C ~ 100°C	4-SMD	2990 Pcs
LTV-815S-TA	Lite-On Inc.	Active	5000Vrms	600% / 7500%	80mA	1V	-30°C ~ 100°C	4-SMD	1025 Pcs

Engineering Selection Recommendations

Parametric Equivalents (Everlight Electronics):

The EL815(S)(TD), EL815(S)(TD)-V, EL815(S)(TU), EL815(S)(TU)-V, EL815(S1)(TD), EL815(S1)(TD)-V, EL815(S1)(TU), and EL815(S1)(TU)-V are direct parametric equivalents to the EL815(S)(TA). All variants maintain identical electrical specifications including 5000Vrms isolation, 600-7500% current transfer ratio, 80mA output current, and 1V maximum Vce saturation. All are ROHS3 compliant with MSL 1 rating. These parts are currently in active production status with substantial inventory availability, ranging from 734 to 1145 pieces per variant.

Similar Equivalents (Lite-On Inc.):

The LTV-815S and LTV-815S-TA from Lite-On Inc. meet all electrical and mechanical substitution criteria. Both maintain 5000Vrms isolation, 600-7500% current transfer ratio, 80mA output current, and 1V Vce saturation in 4-SMD gull wing packaging. Operating temperature range differs: Lite-On parts operate from -30°C to 100°C compared to Everlight's -55°C to 110°C. Both are ROHS3 compliant with MSL 1 rating and are in active production with high inventory availability (2990 and 1025 pieces respectively).

Selection Basis:

For applications requiring the full -55°C to 110°C operating temperature range, Everlight parametric equivalents are the appropriate selection. For applications operating within -30°C to 100°C, Lite-On alternatives provide equivalent electrical performance with higher inventory availability. All recommended substitutes maintain identical package configuration, isolation voltage, output current capacity, and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can EL815(S)(TD) directly replace EL815(S)(TA) in existing designs?

A: Yes. The EL815(S)(TD) is a parametric equivalent with identical electrical specifications, output current rating, isolation voltage, and 4-SMD gull wing package configuration. Both are ROHS3 compliant with MSL 1 rating. The primary difference is product status: EL815(S)(TA) is discontinued while EL815(S)(TD) is in active production.

Q: What is the difference between EL815(S) and EL815(S1) variants?

A: Both EL815(S) and EL815(S1) variants maintain identical electrical parameters including 5000Vrms isolation, 600-7500% current transfer ratio, 80mA output current, and 1V Vce saturation. The designation difference reflects internal manufacturing or packaging variations not specified in the provided parameters. Both are suitable for direct substitution.

Q: Are Lite-On LTV-815S parts compatible with Everlight EL815(S)(TA) designs?

A: LTV-815S and LTV-815S-TA are electrically and mechanically compatible for applications operating within -30°C to 100°C. Both maintain 5000Vrms isolation, 600-7500% current transfer ratio, 80mA output current, 1V Vce saturation, and 4-SMD gull wing packaging. For applications requiring -55°C operation, Everlight parts are required.

Q: What does the "-V" suffix indicate in part numbers like EL815(S)(TD)-V?

A: The "-V" suffix designation is provided in the part number but specific functional differences are not detailed in the available parameters. All "-V" variants maintain identical electrical specifications and are suitable for direct substitution with non-"-V" equivalents.

Q: Can I use LTV-815S-TA instead of EL815(S)(TA)?

A: Yes, for applications within -30°C to 100°C operating range. LTV-815S-TA maintains all critical electrical parameters: 5000Vrms isolation, 600-7500% current transfer ratio, 80mA output current, 1V Vce saturation, and identical 4-SMD gull wing package. Both are ROHS3 compliant with MSL 1 rating. Temperature range is the only operational difference.

Q: What inventory status should I consider when selecting a substitute?

A: All recommended Everlight parametric equivalents have active production status with inventory ranging from 734 to 1145 pieces. Lite-On alternatives have higher availability (1025 to 2990 pieces) and active production status. Discontinued status of the original EL815(S)(TA) makes active alternatives necessary for new production.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Everlight parametric equivalents and Lite-On similar equivalents listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All carry ECCN EAR99 and HTSUS 8541.49.8000 classifications.

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