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

Part Overview

The EL816(S)(TU) is a 5000Vrms optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component features single-channel isolation in a 4-SMD surface mount package, designed for DC input applications requiring high voltage isolation and galvanic separation.

The EL816(S)(TU) is classified as obsolete. Substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. Active equivalent models from the EL816 series provide identical electrical and mechanical specifications with current manufacturing status.

Key Parameters

Parameter	Value
Voltage - Isolation	5000Vrms
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Vce Saturation (Max)	200mV
Rise / Fall Time (Typ)	4µs, 3µs
Operating Temperature	-55°C ~ 110°C
Package / Case	4-SMD, Gull Wing
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the EL816(S)(TU) are selected based on strict parametric equivalence. The following electrical and mechanical parameters must match identically for direct substitution:

Critical Matching Parameters:

Voltage - Isolation: 5000Vrms
Number of Channels: 1
Output Type: Transistor
Current Transfer Ratio range: 50% to 600% @ 5mA
Voltage - Output (Max): 80V
Current - Output / Channel: 50mA
Vce Saturation (Max): 200mV
Operating Temperature: -55°C ~ 110°C
Package / Case: 4-SMD, Gull Wing
Mounting Type: Surface Mount

All substitute parts listed maintain these specifications without deviation. Differences in product status (Active vs. Obsolete) and inventory availability do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Isolation Voltage	CTR Min / Max	Output Voltage (Max)	Output Current	Vce Sat (Max)	Rise / Fall Time	Operating Temp	Package	Inventory
EL816(S)(TU)	Everlight	Obsolete	5000Vrms	50% / 600%	80V	50mA	200mV	4µs, 3µs	-55°C ~ 110°C	4-SMD	790 Pcs
EL816(S)(TD)	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	4µs, 3µs	-55°C ~ 110°C	4-SMD	882 Pcs
EL816(S)(TD)-V	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	4µs, 3µs	-55°C ~ 110°C	4-SMD	828 Pcs
EL816(S)(TU)-V	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	4µs, 3µs	-55°C ~ 110°C	4-SMD	674 Pcs
EL816(S1)(TD)	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	4µs, 3µs	-55°C ~ 110°C	4-SMD	651 Pcs
EL816(S1)(TD)-V	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	4µs, 3µs	-55°C ~ 110°C	4-SMD	691 Pcs
EL816(S1)(TU)	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	4µs, 3µs	-55°C ~ 110°C	4-SMD	836 Pcs
EL816(S1)(TU)-V	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	4µs, 3µs	-55°C ~ 110°C	4-SMD	750 Pcs
EL816S1(I)(TU)-V	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	4µs, 3µs	-55°C ~ 110°C	4-SMD	105600 Pcs
EL817(S)(TD)-G	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	6µs, 8µs	-55°C ~ 110°C	4-SMD	1087 Pcs
EL817(S)(TD)-VG	Everlight	Active	5000Vrms	50% / 600%	80V	50mA	200mV	6µs, 8µs	-55°C ~ 110°C	4-SMD	915 Pcs

Engineering Selection Recommendations

Primary Substitutes (Identical Electrical and Timing Characteristics):

The following parts provide direct substitution with identical rise and fall time specifications (4µs, 3µs):

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

All listed parts are Active status products with ROHS3 compliance and MSL Level 1 rating, ensuring compliance with current manufacturing and environmental standards.

Secondary Substitutes (Timing Variation):

EL817(S)(TD)-G and EL817(S)(TD)-VG maintain all electrical parameters but feature different rise and fall time specifications (6µs, 8µs). These parts are suitable for applications where timing tolerance permits the extended switching characteristics.

Inventory Considerations:

EL816S1(I)(TU)-V offers the highest inventory availability at 105,600 pieces, providing supply chain security for high-volume production requirements.

Frequently Asked Questions (FAQ)

Q: Can EL816(S)(TU) be directly replaced with EL816(S)(TD)?

A: Yes. Both parts maintain identical electrical specifications including isolation voltage (5000Vrms), current transfer ratio (50-600% @ 5mA), output voltage (80V max), output current (50mA), and switching characteristics (4µs rise, 3µs fall). The primary difference is product status: EL816(S)(TU) is obsolete while EL816(S)(TD) is active.

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

A: The EL816 and EL817 series share identical electrical parameters for isolation voltage, output voltage, output current, and saturation voltage. The EL817 series exhibits different switching characteristics with rise and fall times of 6µs and 8µs respectively, compared to 4µs and 3µs for EL816 series. Selection depends on application timing requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed maintain ROHS3 compliance status, meeting current environmental and regulatory requirements for electronic component manufacturing.

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

A: The "-V" suffix appears in multiple part number variants within the EL816 series. All "-V" variants maintain identical electrical and mechanical specifications to their non-"-V" counterparts and are directly interchangeable.

Q: Is the 4-SMD package compatible across all substitute parts?

A: Yes. All substitute parts use the 4-SMD Gull Wing surface mount package. PCB footprint and reflow soldering profiles remain consistent across all listed alternatives.

Q: Which substitute part offers the best inventory availability?

A: EL816S1(I)(TU)-V provides the highest inventory level at 105,600 pieces, suitable for applications requiring immediate availability and supply chain continuity.

Q: Can EL817(S)(TD)-G be used in place of EL816(S)(TU) without circuit modification?

A: EL817(S)(TD)-G is electrically equivalent but features different switching times (6µs rise, 8µs fall versus 4µs rise, 3µs fall). Use is permissible only if the application circuit tolerates the extended switching delay without performance degradation.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts operate across the identical temperature range of -55°C to 110°C, ensuring thermal compatibility in equivalent applications.

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