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

Part Overview

The EL816(S)(TB) 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 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)	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)	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)(TB) is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms (all substitutes maintain this specification)

Channel Configuration: Single channel (1 channel) required for direct replacement

Output Stage: Transistor output topology (not photodiode or other output types)

Current Transfer Ratio Range: 50% minimum to 600% maximum @ 5mA input current

Output Electrical Characteristics: Maximum output voltage of 80V, maximum output current of 50mA per channel, Vce saturation maximum of 200mV

Switching Performance: Rise time 4µs and fall time 3µs (or equivalent)

Input Configuration: DC input type

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

Environmental Compliance: ROHS3 compliance and MSL Level 1 rating

Operating Temperature Range: -55°C to 110°C

All substitute parts listed below match these parameters exactly. Differences in product status (active vs. discontinued) and packaging designation (TD, TU, TR variants) do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	CTR Min / Max	Rise / Fall Time	Output Voltage (Max)	Output Current	Vce Sat (Max)	Temp Range	Package	Product Status	Inventory
EL816(S)(TB)	Everlight	5000Vrms	50% / 600%	4µs / 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Discontinued	1038 Pcs
EL816(S)(TD)	Everlight	5000Vrms	50% / 600%	4µs / 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	882 Pcs
EL816(S)(TD)-V	Everlight	5000Vrms	50% / 600%	4µs / 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	828 Pcs
EL816(S)(TU)-V	Everlight	5000Vrms	50% / 600%	4µs / 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	674 Pcs
EL816(S1)(TD)	Everlight	5000Vrms	50% / 600%	4µs / 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	651 Pcs
EL816(S1)(TD)-V	Everlight	5000Vrms	50% / 600%	4µs / 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	691 Pcs
EL816(S1)(TU)	Everlight	5000Vrms	50% / 600%	4µs / 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	836 Pcs
EL816(S1)(TU)-V	Everlight	5000Vrms	50% / 600%	4µs / 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	750 Pcs
EL816S1(I)(TU)-V	Everlight	5000Vrms	50% / 600%	4µs / 3µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	105600 Pcs
EL817(S)(TD)-G	Everlight	5000Vrms	50% / 600%	6µs / 8µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	1087 Pcs
EL817(S)(TD)-VG	Everlight	5000Vrms	50% / 600%	6µs / 8µs	80V	50mA	200mV	-55°C ~ 110°C	4-SMD	Active	915 Pcs

Engineering Selection Recommendations

Primary Substitutes (Identical Switching Performance):

The following parts provide complete electrical and mechanical equivalence with identical rise and fall times of 4µs and 3µs respectively:

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, and EL816S1(I)(TU)-V

All are manufactured by Everlight Electronics Co Ltd, maintain ROHS3 compliance, and feature MSL Level 1 rating. These parts are currently in active production status with inventory availability ranging from 651 to 105,600 units.

Secondary Substitutes (Slower Switching Performance):

EL817(S)(TD)-G and EL817(S)(TD)-VG feature identical electrical specifications with the exception of switching performance: rise time of 6µs and fall time of 8µs compared to the original 4µs and 3µs. These parts are suitable for applications where switching speed is not a critical constraint.

Packaging Considerations:

The designation suffixes (TD, TU, TR) indicate different packaging and tape configurations. The TB designation of the original part corresponds to standard tape and reel packaging. Parts designated with TD, TU, or TR are functionally equivalent and differ only in delivery format. EL816S1(I)(TU)-V is supplied in Tape & Reel format with the highest inventory availability.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring compatibility with modern manufacturing processes and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can EL816(S)(TD) directly replace EL816(S)(TB) in existing circuit designs?

A: Yes. EL816(S)(TD) is a direct electrical and mechanical equivalent. All critical parameters including isolation voltage, current transfer ratio, output characteristics, and switching performance are identical. The only difference is product status (active vs. discontinued) and packaging designation.

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

A: The EL816 and EL817 series are both 5000Vrms single-channel optoisolators with transistor output. The primary difference is switching speed: EL816 devices have rise/fall times of 4µs/3µs, while EL817 devices have rise/fall times of 6µs/8µs. EL817 parts are suitable for applications where faster switching is not required.

Q: Are the different packaging designations (TD, TU, TR) electrically equivalent?

A: Yes. The packaging designations indicate different tape and reel configurations or delivery formats. They do not affect electrical performance or mechanical compatibility. All variants maintain identical specifications for isolation voltage, current transfer ratio, output voltage/current, and operating temperature range.

Q: Which substitute part has the highest inventory availability?

A: EL816S1(I)(TU)-V offers the highest inventory with 105,600 units in stock. This part is supplied in Tape & Reel format and maintains complete electrical equivalence with the original EL816(S)(TB).

Q: Is the -V suffix designation significant for substitution purposes?

A: No. The -V suffix indicates a specific packaging or marking variant but does not affect electrical specifications or functional performance. Parts with and without the -V designation are electrically equivalent.

Q: Can I use EL817(S)(TD)-G as a substitute if EL816 variants are unavailable?

A: EL817(S)(TD)-G is electrically compatible but features slower switching performance (6µs/8µs rise/fall times versus 4µs/3µs). Use this part only if your application does not require the faster switching speed of the EL816 series.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with current manufacturing standards and environmental regulations.

Q: What is the significance of the S1 designation in part numbers like EL816(S1)(TD)?

A: The S1 designation indicates a specific internal configuration or manufacturing variant within the EL816 base product family. Electrically and mechanically, S1 variants are equivalent to non-S1 variants and are suitable for direct substitution.

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