EL817(A)-VG Equivalent & Substitute Parts

Part Overview

The EL817(A)-VG is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides galvanic isolation up to 5000Vrms with a single channel configuration in a 4-DIP package. The part is currently in active production status with 1148 units in stock. Substitute parts are identified to address application requirements including higher isolation voltage ratings, alternative current transfer ratio specifications, or inventory availability considerations.

Key Parameters

Parameter	Value
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	80% @ 5mA
Current Transfer Ratio (Max)	160% @ 5mA
Maximum Output Voltage	80V
Maximum Output Current	50mA
Package Type	4-DIP (0.300", 7.62mm)
Operating Temperature Range	-55°C to 110°C
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitute parts for the EL817(A)-VG are qualified based on the following criteria:

Electrical Compatibility Parameters:

Isolation voltage rating equal to or greater than 5000Vrms
Single channel configuration
Transistor output type
Maximum output voltage of 80V or greater
Maximum output current of 50mA or greater
Operating temperature range encompassing -55°C to 110°C
DC input type

Mechanical Compatibility Parameters:

4-DIP package format with 0.300" (7.62mm) pitch
Through hole mounting type

Regulatory Compliance:

RoHS3 compliance
Moisture Sensitivity Level 1 (Unlimited)

The substitute parts VO618A-2 and VO618A-4 meet these criteria with enhanced isolation voltage ratings of 5300Vrms and alternative current transfer ratio specifications.

Parameter Comparison

Parameter	EL817(A)-VG	VO618A-2	VO618A-4
Manufacturer	Everlight Electronics Co Ltd	Vishay Semiconductor Opto Division	Vishay Semiconductor Opto Division
Number of Channels	1	1	1
Voltage - Isolation	5000Vrms	5300Vrms	5300Vrms
Current Transfer Ratio (Min)	80% @ 5mA	63% @ 1mA	160% @ 1mA
Current Transfer Ratio (Max)	160% @ 5mA	125% @ 1mA	320% @ 1mA
Rise / Fall Time (Typ)	6µs, 8µs	2µs, 2µs	2µs, 2µs
Output Type	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.2V	1.1V	1.1V
Current - DC Forward (If) (Max)	60mA	60mA	60mA
Vce Saturation (Max)	200mV	400mV	400mV
Operating Temperature	-55°C to 110°C	-55°C to 110°C	-55°C to 110°C
Package / Case	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

EL817(A)-VG Selection Criteria:

Primary choice when current design specifies Everlight Electronics manufacturer
Suitable for applications requiring 5000Vrms isolation minimum
Current transfer ratio range of 80% to 160% at 5mA input current
Vce saturation specification of 200mV maximum

VO618A-4 Selection Criteria:

Higher current transfer ratio specification (160% to 320% at 1mA) for applications requiring enhanced gain characteristics
Improved isolation voltage rating of 5300Vrms
Faster switching response with 2µs rise and fall times
Active production status with 12850 units in stock
RoHS3 compliant and REACH unaffected

VO618A-2 Selection Criteria:

Lower current transfer ratio specification (63% to 125% at 1mA) for applications requiring reduced gain
Improved isolation voltage rating of 5300Vrms
Faster switching response with 2µs rise and fall times
Active production status with 4394 units in stock
RoHS3 compliant and REACH unaffected

All substitute parts maintain mechanical compatibility through identical 4-DIP package format and through-hole mounting configuration. All parts comply with RoHS3 requirements and MSL Level 1 specifications.

Frequently Asked Questions (FAQ)

Q: Can VO618A-4 directly replace EL817(A)-VG in existing designs?

A: VO618A-4 is mechanically and electrically compatible as a substitute. Both components use 4-DIP through-hole packages with identical pin spacing. Electrical parameters including maximum output voltage (80V) and maximum output current (50mA) are identical. The primary differences are higher isolation voltage (5300Vrms vs 5000Vrms), different current transfer ratio specifications, and faster switching times. Circuit validation is required to confirm compatibility with specific application requirements.

Q: What is the difference between VO618A-2 and VO618A-4?

A: Both VO618A-2 and VO618A-4 share identical mechanical and most electrical specifications. The key difference is current transfer ratio: VO618A-2 provides 63% to 125% at 1mA, while VO618A-4 provides 160% to 320% at 1mA. Selection depends on the required gain characteristics for the specific application circuit.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. EL817(A)-VG, VO618A-2, and VO618A-4 are all RoHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: What is the package compatibility between these optoisolators?

A: All three parts use identical 4-DIP packages with 0.300" (7.62mm) pitch spacing and through-hole mounting. PCB footprints are directly compatible without modification.

Q: How do switching times compare between these parts?

A: EL817(A)-VG has rise and fall times of 6µs and 8µs respectively. Both VO618A-2 and VO618A-4 provide faster switching with 2µs rise and fall times. Applications sensitive to switching speed should account for this difference.

Q: What is the significance of Vce saturation differences?

A: EL817(A)-VG specifies maximum Vce saturation of 200mV, while both Vishay substitutes specify 400mV maximum. This affects output voltage drop during transistor saturation and should be evaluated in applications with tight voltage margin requirements.

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