EL817(S)(C)(TA)-VG Optoisolator Equivalent & Substitute Parts

Part Overview

The EL817(S)(C)(TA)-VG is a 5000Vrms optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This single-channel device is designed for DC input applications requiring galvanic isolation in 4-SMD surface mount packages. The main 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)	200% @ 5mA
Current Transfer Ratio (Max)	400% @ 5mA
Rise / Fall Time (Typ)	6µs, 8µs
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 EL817(S)(C)(TA)-VG is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms (mandatory match)

Current Transfer Ratio: 200% minimum and 400% maximum at 5mA input (mandatory match)

Output Configuration: Transistor output type with 80V maximum output voltage and 50mA per-channel current rating (mandatory match)

Input Type: DC input (mandatory match)

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

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

Electrical Characteristics: Forward voltage 1.2V typical, maximum forward current 60mA, Vce saturation 200mV maximum (mandatory match)

Compliance: ROHS3 compliant, MSL Level 1 (mandatory match)

Substitute parts are grouped into two categories based on rise/fall time performance: EL816 series devices with 4µs/3µs rise/fall times, and EL817 series devices with 6µs/8µs rise/fall times. Both series maintain identical isolation voltage, current transfer ratio, output ratings, and thermal specifications. The primary distinction between substitute options lies in switching speed characteristics and product status (active versus discontinued).

Parameter Comparison

Parameter	EL817(S)(C)(TA)-VG (Main)	EL816(S)(C)(TD)	EL816(S)(C)(TD)-V	EL816(S)(C)(TU)	EL816(S)(C)(TU)-V	EL816(S1)(C)(TD)	EL816(S1)(C)(TD)-V	EL816(S1)(C)(TU)	EL816(S1)(C)(TU)-V	EL817(S)(C)(TD)-G	EL817(S)(C)(TD)-VG
Manufacturer	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA
Current Transfer Ratio (Max)	400% @ 5mA	400% @ 5mA	400% @ 5mA	400% @ 5mA	400% @ 5mA	400% @ 5mA	400% @ 5mA	400% @ 5mA	400% @ 5mA	400% @ 5mA	400% @ 5mA
Rise / Fall Time (Typ)	6µs, 8µs	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)	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA
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	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For applications requiring identical switching speed characteristics (6µs rise / 8µs fall time):

Select EL817(S)(C)(TD)-G or EL817(S)(C)(TD)-VG. Both devices maintain the exact rise and fall time specifications of the discontinued EL817(S)(C)(TA)-VG. EL817(S)(C)(TD)-VG is the direct functional equivalent with active product status and 729 units in stock. EL817(S)(C)(TD)-G is also active with 1004 units available. These options preserve circuit timing behavior without modification to signal conditioning or control logic.

For applications where faster switching speed is acceptable (4µs rise / 3µs fall time):

Select from the EL816 series: EL816(S)(C)(TD), EL816(S)(C)(TD)-V, EL816(S)(C)(TU), EL816(S)(C)(TU)-V, EL816(S1)(C)(TD), EL816(S1)(C)(TD)-V, EL816(S1)(C)(TU), or EL816(S1)(C)(TU)-V. All EL816 variants are active products with inventory ranging from 781 to 1104 units. These devices provide improved switching performance while maintaining all other electrical and mechanical specifications. Selection among EL816 variants depends on specific package code requirements and availability constraints.

Compliance and Certification:

All substitute parts are ROHS3 compliant with MSL Level 1 rating, matching the original part's environmental and regulatory status. All devices carry identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications.

Frequently Asked Questions (FAQ)

Q: Can EL816 series devices directly replace the EL817(S)(C)(TA)-VG in existing circuit boards?

A: Yes. EL816 and EL817 series devices are pin-compatible in 4-SMD, Gull Wing packages and maintain identical electrical specifications for isolation voltage, current transfer ratio, output voltage/current ratings, and operating temperature range. The primary difference is switching speed: EL816 devices switch faster (4µs/3µs) than EL817 devices (6µs/8µs). Circuit boards designed for EL817 devices will function with EL816 substitutes without PCB modifications.

Q: What is the significance of the rise and fall time difference between EL816 and EL817 series?

A: Rise time (6µs for EL817 versus 4µs for EL816) and fall time (8µs for EL817 versus 3µs for EL816) determine the speed at which the optoisolator output transitions between on and off states. EL817 devices have slower transitions, which may be beneficial in noise-sensitive applications or where controlled slew rates are required. EL816 devices provide faster response, suitable for high-frequency switching applications. Selection depends on circuit timing requirements.

Q: Are all substitute parts available in the same package configuration?

A: Yes. All substitute parts listed are available in 4-SMD, Gull Wing surface mount packages, identical to the original EL817(S)(C)(TA)-VG. No package conversion or board redesign is required.

Q: What do the suffix codes (TD, TU, -V, -G, -VG) represent?

A: Suffix codes indicate manufacturing date codes, temperature grade designations, or packaging variations within the Everlight product line. These codes do not affect the core electrical specifications or substitution compatibility. All variants with the same base part number (EL816 or EL817) maintain identical isolation voltage, current transfer ratio, output ratings, and thermal operating range.

Q: Is the EL817(S)(C)(TA)-VG still available for purchase?

A: No. The EL817(S)(C)(TA)-VG is discontinued at DiGi Electronics. However, the functionally equivalent EL817(S)(C)(TD)-VG is active with 729 units in stock, and multiple EL816 series alternatives are available with inventory ranging from 781 to 1104 units across variants.

Q: What inventory levels are available for substitute parts?

A: EL816(S)(C)(TD): 807 units; EL816(S)(C)(TD)-V: 649 units; EL816(S)(C)(TU): 822 units; EL816(S)(C)(TU)-V: 951 units; EL816(S1)(C)(TD): 827 units; EL816(S1)(C)(TD)-V: 781 units; EL816(S1)(C)(TU): 992 units; EL816(S1)(C)(TU)-V: 1104 units; EL817(S)(C)(TD)-G: 1004 units; EL817(S)(C)(TD)-VG: 729 units.

Q: Do all substitute parts meet the same RoHS and MSL requirements?

A: Yes. All substitute parts are ROHS3 compliant with MSL Level 1 (Unlimited) rating, matching the original part's environmental specifications and regulatory compliance status.

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