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

Part Overview

The EL816(S)(TA)-V is a 5000Vrms optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This single-channel device features a 4-SMD surface mount package and is designed for DC input applications requiring galvanic isolation. The part is currently discontinued at DiGi Electronics, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for seamless circuit board integration.

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)	60 mA
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)-V are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

Isolation Voltage: 5000Vrms (mandatory for safety-critical applications)

Channel Configuration: Single channel (1 channel)

Output Stage: Transistor output topology

Current Transfer Ratio Range: 50% minimum and 600% maximum at 5mA input current

Output Specifications: Maximum 80V output voltage and 50mA per channel current capacity

Switching Characteristics: Rise time 4µs and fall time 3µs

Input Type: DC input only

Package Format: 4-SMD surface mount with gull wing leads

Temperature Range: -55°C to 110°C operating window

Compliance: ROHS3 compliant with MSL Level 1

Substitute parts are grouped into two categories: (1) Everlight EL816 series variants with identical specifications and active product status, and (2) EL817 series variants with marginally different switching characteristics (6µs rise, 8µs fall) that maintain all other electrical parameters.

Parameter Comparison

Parameter	EL816(S)(TA)-V	EL816(S)(TD)	EL816(S)(TD)-V	EL816(S)(TU)-V	EL816(S1)(TD)	EL816(S1)(TD)-V	EL816(S1)(TU)	EL816(S1)(TU)-V	EL816S1(I)(TU)-V	EL817(S)(TD)-G	EL817(S)(TD)-VG
Manufacturer	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA
Rise / Fall Time (Typ)	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	6µs, 8µs	6µs, 8µs
Input Type	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V	80V	80V	80V	80V	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V
Current - DC Forward (If) (Max)	60 mA	60 mA	60 mA	60 mA	60 mA	60 mA	60 mA	60 mA	60 mA	60 mA	60 mA
Vce Saturation (Max)	200mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV
Operating Temperature	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Inventory Availability	771 Pcs	882 Pcs	828 Pcs	674 Pcs	651 Pcs	691 Pcs	836 Pcs	750 Pcs	105600 Pcs	1087 Pcs	915 Pcs

Engineering Selection Recommendations

Primary Substitutes (Identical Specifications):

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 to the EL816(S)(TA)-V. All maintain identical electrical characteristics including 5000Vrms isolation, 50-600% current transfer ratio, 4µs rise and 3µs fall times, and 4-SMD gull wing packaging. All substitute parts carry active product status and ROHS3 compliance certification. Selection among these variants should be based on inventory availability and specific temperature coefficient or packaging requirements indicated by the suffix designations (TD vs TU, with or without -V suffix).

Secondary Substitutes (Modified Switching Characteristics):

The EL817(S)(TD)-G and EL817(S)(TD)-VG represent functional alternatives with identical isolation voltage, output specifications, and package format. These parts differ only in switching speed characteristics, featuring 6µs rise time and 8µs fall time compared to the 4µs/3µs specification of the EL816 series. Selection of EL817 variants is appropriate only when circuit timing requirements accommodate the slower switching response.

High-Volume Alternative:

The EL816S1(I)(TU)-V offers the highest inventory availability at 105,600 pieces in tape and reel packaging format. This variant maintains all electrical specifications identical to the main part and is suitable for high-volume production environments requiring extended supply assurance.

Frequently Asked Questions (FAQ)

Q: Can EL816(S)(TD)-V be used as a direct replacement for EL816(S)(TA)-V?

A: Yes. The EL816(S)(TD)-V is a parametric equivalent with identical isolation voltage (5000Vrms), current transfer ratio (50-600% @ 5mA), switching characteristics (4µs rise, 3µs fall), output specifications (80V max, 50mA per channel), and 4-SMD gull wing package. The part is currently active with confirmed inventory availability.

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

A: The EL816 and EL817 series are functionally equivalent across all electrical parameters except switching speed. EL816 variants feature 4µs rise and 3µs fall times, while EL817 variants feature 6µs rise and 8µs fall times. Selection depends on circuit timing requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All EL816 series substitutes and EL817 series substitutes carry ROHS3 compliance certification. The EL816S1(I)(TU)-V variant does not specify RoHS status in the provided data.

Q: What packaging formats are available for EL816 optoisolators?

A: All listed substitutes utilize 4-SMD surface mount packages with gull wing lead configuration. The EL816S1(I)(TU)-V is supplied in tape and reel (TR) format for automated assembly, while other variants are available in standard packaging.

Q: Can I substitute an EL817 part for an EL816 part in a high-speed switching application?

A: No. EL817 variants have slower switching characteristics (6µs rise, 8µs fall) compared to EL816 variants (4µs rise, 3µs fall). In applications requiring the faster response time, only EL816 series parts are appropriate.

Q: What is the moisture sensitivity level for these optoisolators?

A: All EL816 and EL817 series parts carry MSL Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are there inventory differences between substitute variants?

A: Yes. Inventory levels vary significantly. EL816S1(I)(TU)-V offers the highest availability at 105,600 pieces. Standard EL816 variants range from 651 to 882 pieces. EL817 variants range from 915 to 1,087 pieces. Selection should account for production volume requirements and supply chain lead times.

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