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

Part Overview

The EL816(S)(A)(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 part is currently discontinued at DiGi Electronics, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for direct component substitution in existing designs.

Key Parameters

Parameter	Value
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	80% @ 5mA
Current Transfer Ratio (Max)	160% @ 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)(A)(TA) is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms (mandatory match)

Channel Configuration: Single channel (mandatory match)

Output Stage: Transistor output (mandatory match)

Current Transfer Ratio: 80% minimum and 160% maximum at 5mA (mandatory match)

Output Specifications: Maximum output voltage of 80V and 50mA per channel (mandatory match)

Input Type: DC input (mandatory match)

Package Configuration: 4-SMD, Gull Wing surface mount (mandatory match)

Operating Temperature Range: -55°C to 110°C (mandatory match)

Compliance: ROHS3 compliance and MSL Level 1 (mandatory match)

Substitute parts are grouped into two categories: Everlight Electronics EL816 series variants with active product status, and cross-manufacturer alternatives meeting identical electrical and mechanical specifications. All listed substitutes maintain complete parametric equivalence to the discontinued EL816(S)(A)(TA).

Parameter Comparison

Part Number	Manufacturer	Product Status	Isolation Voltage	Channels	CTR Min / Max	Output Voltage (Max)	Output Current	Rise / Fall Time	Package	Inventory
EL816(S)(A)(TA)	Everlight	Discontinued	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	786 Pcs
EL816(S)(A)(TD)	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	973 Pcs
EL816(S)(A)(TD)-V	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	971 Pcs
EL816(S)(A)(TU)	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	825 Pcs
EL816(S)(A)(TU)-V	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	954 Pcs
EL816(S1)(A)(TD)	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	1063 Pcs
EL816(S1)(A)(TD)-V	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	989 Pcs
EL816(S1)(A)(TU)	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	756 Pcs
EL816(S1)(A)(TU)-V	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	778 Pcs
EL816S2(A)(TU)-V	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	4µs, 3µs	4-SMD, Gull Wing	939 Pcs
EL817(S)(A)(TD)-G	Everlight	Active	5000Vrms	1	80% / 160%	80V	50mA	6µs, 8µs	4-SMD, Gull Wing	904 Pcs

Engineering Selection Recommendations

Primary Substitutes (Everlight EL816 Series - Active Status):

The following parts provide direct parametric equivalence with active product status and full ROHS3 compliance:

EL816(S)(A)(TD), EL816(S)(A)(TD)-V, EL816(S)(A)(TU), EL816(S)(A)(TU)-V, EL816(S1)(A)(TD), EL816(S1)(A)(TD)-V, EL816(S1)(A)(TU), EL816(S1)(A)(TU)-V, and EL816S2(A)(TU)-V all maintain identical electrical specifications and package configuration. These variants differ only in temperature grade designation (TD vs TU) and voltage rating suffix (-V designation). All maintain 4µs and 3µs rise/fall times, 5000Vrms isolation, and 50mA output current capacity.

Secondary Substitute (EL817 Series):

EL817(S)(A)(TD)-G maintains all critical electrical parameters including 5000Vrms isolation, single-channel configuration, 80% to 160% current transfer ratio, and 4-SMD Gull Wing packaging. This part differs only in rise/fall time specification (6µs and 8µs versus 4µs and 3µs), representing a slower switching characteristic. Selection of this part is appropriate where timing-critical applications do not require the faster switching performance of the EL816 series.

Compliance and Availability:

All recommended substitutes carry ROHS3 compliance certification and MSL Level 1 moisture sensitivity rating. Inventory availability ranges from 756 to 1063 pieces across the active substitute options, ensuring supply continuity for production requirements.

Frequently Asked Questions (FAQ)

Q: Can EL816(S)(A)(TA) be directly replaced with any EL816 variant listed?

A: Yes. All EL816 series variants listed maintain identical isolation voltage (5000Vrms), channel count (1), output type (transistor), current transfer ratio (80% to 160% @ 5mA), output specifications (80V maximum, 50mA per channel), and 4-SMD Gull Wing package configuration. Direct substitution is supported without circuit modification.

Q: What is the difference between EL816(S)(A)(TD) and EL816(S)(A)(TU) variants?

A: The TD and TU designations indicate different temperature grade specifications within the -55°C to 110°C operating range. Both parts maintain identical electrical performance and package configuration. Selection between these variants depends on specific temperature grade requirements in your application documentation.

Q: Why does EL817(S)(A)(TD)-G have different rise/fall times?

A: The EL817 series is characterized by 6µs rise time and 8µs fall time compared to the EL816 series 4µs and 3µs specifications. This represents a slower switching response. The EL817 remains electrically equivalent in isolation voltage, channel count, output type, and current transfer ratio. Use EL817 only where application timing requirements accommodate the slower switching performance.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL Level 1 moisture sensitivity rating, matching the original EL816(S)(A)(TA) specifications.

Q: What does the -V suffix indicate on certain part numbers?

A: The -V suffix appears on specific variants within the EL816 series. All -V designated parts maintain identical electrical specifications and package configuration as their non-V counterparts. The suffix represents a manufacturing or specification variant designation without impact on electrical performance or substitution compatibility.

Q: Can I use EL816S2(A)(TU)-V as a substitute?

A: Yes. EL816S2(A)(TU)-V maintains complete parametric equivalence including 5000Vrms isolation, single-channel transistor output, 80% to 160% current transfer ratio, 80V maximum output voltage, 50mA output current, and 4-SMD Gull Wing packaging. This part is currently active with 939 pieces in inventory.

Q: What inventory levels are available for substitutes?

A: Inventory availability for active substitutes ranges from 756 to 1063 pieces. EL816(S1)(A)(TD) offers the highest availability at 1063 pieces. Specific inventory levels are provided in the parameter comparison table for each substitute part number.

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