EL817(S)(TA)-V Equivalent & Substitute Parts

Part Overview

The EL817(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 equivalent alternatives that maintain identical electrical and mechanical specifications for seamless integration into existing designs.

Key Parameters

Parameter	Value
Voltage - Isolation	5000Vrms
Number of Channels	1
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)	35V
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 EL817(S)(TA)-V is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Voltage - Isolation: 5000Vrms
Number of Channels: 1
Current Transfer Ratio: 50% (Min) @ 5mA and 600% (Max) @ 5mA
Rise / Fall Time: 4µs, 3µs
Input Type: DC
Output Type: Transistor
Voltage - Output (Max): 35V
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

Mechanical Equivalence Criteria:

Mounting Type: Surface Mount
Package / Case: 4-SMD, Gull Wing

Compliance Criteria:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical performance and mechanical compatibility. Everlight Electronics EL817 series variants (EL817(S)(TD), EL817(S)(TD)-V, EL817(S)(TU), EL817(S)(TU)-V, EL817(S1)(TD), EL817(S1)(TD)-V, EL817(S1)(TU), EL817(S1)(TU)-V) are direct parametric equivalents with active product status. Würth Elektronik WL-OCPT series parts (140817142000, 140817143000) provide equivalent electrical performance with alternative supplier device packaging designations.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Isolation	Number of Channels	CTR Min @ 5mA	CTR Max @ 5mA	Rise / Fall Time (Typ)	Output Type	Voltage - Output (Max)	Current - Output / Channel	Vf (Typ)	If (Max)	Vce Sat (Max)	Operating Temp	Package / Case	Product Status	Inventory (Pcs)
EL817(S)(TA)-V	Everlight Electronics	5000Vrms	1	50%	600%	4µs, 3µs	Transistor	35V	50mA	1.2V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Discontinued	1168
EL817(S)(TD)	Everlight Electronics	5000Vrms	1	50%	600%	4µs, 3µs	Transistor	35V	50mA	1.2V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	1120
EL817(S)(TD)-V	Everlight Electronics	5000Vrms	1	50%	600%	4µs, 3µs	Transistor	35V	50mA	1.2V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	1006
EL817(S)(TU)	Everlight Electronics	5000Vrms	1	50%	600%	4µs, 3µs	Transistor	35V	50mA	1.2V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	1113
EL817(S)(TU)-V	Everlight Electronics	5000Vrms	1	50%	600%	4µs, 3µs	Transistor	35V	50mA	1.2V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	1096
EL817(S1)(TD)	Everlight Electronics	5000Vrms	1	50%	600%	4µs, 3µs	Transistor	35V	50mA	1.2V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	787
EL817(S1)(TD)-V	Everlight Electronics	5000Vrms	1	50%	600%	4µs, 3µs	Transistor	35V	50mA	1.2V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	680
EL817(S1)(TU)	Everlight Electronics	5000Vrms	1	50%	600%	4µs, 3µs	Transistor	35V	50mA	1.2V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	950
EL817(S1)(TU)-V	Everlight Electronics	5000Vrms	1	50%	600%	4µs, 3µs	Transistor	35V	50mA	1.2V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	1044
140817142000	Würth Elektronik	5000Vrms	1	50%	600%	3µs, 4µs	Transistor	35V	50mA	1.24V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	1806
140817143000	Würth Elektronik	5000Vrms	1	50%	600%	3µs, 4µs	Transistor	35V	50mA	1.24V	60mA	200mV	-55°C ~ 110°C	4-SMD, Gull Wing	Active	2671

Engineering Selection Recommendations

Primary Substitutes (Everlight Electronics EL817 Series)

The Everlight Electronics EL817(S)(TD), EL817(S)(TD)-V, EL817(S)(TU), EL817(S)(TU)-V, EL817(S1)(TD), EL817(S1)(TD)-V, EL817(S1)(TU), and EL817(S1)(TU)-V variants are direct parametric equivalents to the discontinued EL817(S)(TA)-V. All variants maintain identical electrical specifications across isolation voltage, current transfer ratio, output characteristics, and operating temperature range. All Everlight variants carry active product status and ROHS3 compliance certification. These parts are suitable for direct substitution in applications requiring 5000Vrms isolation with single-channel transistor output in 4-SMD surface mount packages.

Secondary Substitutes (Würth Elektronik WL-OCPT Series)

The Würth Elektronik parts 140817142000 and 140817143000 provide equivalent electrical performance with minor variations in forward voltage (1.24V typical versus 1.2V) and rise/fall time ordering (3µs, 4µs versus 4µs, 3µs). These differences remain within the functional tolerance of the optoisolator category. Both Würth parts are active products with ROHS3 compliance and REACH Unaffected status. The alternative supplier device packaging designations (4-DIP-S and 4-DIP-SL) maintain mechanical compatibility with 4-SMD, Gull Wing footprints for surface mount applications.

Inventory Availability

Würth Elektronik 140817143000 offers the highest inventory availability at 2671 pieces, followed by 140817142000 at 1806 pieces. Among Everlight variants, EL817(S)(TD) provides 1120 pieces and EL817(S)(TU) provides 1113 pieces of active stock.

Frequently Asked Questions (FAQ)

Q: Can EL817(S)(TD) directly replace EL817(S)(TA)-V?

A: Yes. The EL817(S)(TD) maintains identical electrical specifications including 5000Vrms isolation, 50-600% current transfer ratio, 35V maximum output voltage, and 50mA output current. Both use 4-SMD Gull Wing surface mount packages. The EL817(S)(TD) is active product status, making it suitable for direct substitution.

Q: What is the difference between EL817(S) and EL817(S1) variants?

A: The provided data shows no electrical parameter differences between EL817(S) and EL817(S1) variants. Both maintain identical isolation voltage, current transfer ratio, output characteristics, and operating temperature specifications. Selection between these variants depends on availability and supplier requirements.

Q: Are Würth Elektronik 140817142000 and 140817143000 compatible with the original EL817(S)(TA)-V?

A: Yes. Both Würth parts maintain the critical electrical specifications: 5000Vrms isolation, 50-600% current transfer ratio, 35V maximum output voltage, and 50mA output current. Minor variations exist in forward voltage (1.24V versus 1.2V) and rise/fall time ordering, which remain within functional tolerance for optoisolator applications. Both are active products with ROHS3 compliance.

Q: What does the "-V" suffix indicate in part numbers like EL817(S)(TA)-V?

A: The "-V" suffix is included in the provided part number specifications but no functional distinction is documented in the supplied parameters. Both variants with and without "-V" maintain identical electrical and mechanical specifications.

Q: Can I use 140817143000 instead of 140817142000?

A: Yes. Both Würth parts are parametric equivalents with identical electrical specifications. The primary difference is the supplier device package designation (4-DIP-SL versus 4-DIP-S), which does not affect functional compatibility in 4-SMD Gull Wing surface mount applications. Part 140817143000 offers higher inventory availability at 2671 pieces.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant certification, matching the compliance status of the original EL817(S)(TA)-V.

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

A: All Everlight and Würth optoisolators listed carry Moisture Sensitivity Level (MSL) 1, indicating unlimited moisture sensitivity protection. No special moisture control measures are required during storage or handling.

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