EL817(D)-G Equivalent & Substitute Parts

Part Overview

The EL817(D)-G 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 through-hole package. The device is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

EL817(D)-G

Everlight Electronics Co LtdIn Stock: 687EL817(D)-G Datasheet

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VO618A-2

Vishay Semiconductor Opto DivisionIn Stock: 4441VO618A-2 Datasheet

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VO618A-4

Vishay Semiconductor Opto DivisionIn Stock: 12873VO618A-4 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EL817(D)-G are determined by strict alignment of the following critical parameters:

Mechanical Compatibility:

• Package type: 4-DIP (0.300", 7.62mm)
• Mounting type: Through Hole
• Pin count and footprint equivalence

Electrical Compatibility:

• Number of channels: 1
• Output type: Transistor
• Voltage - Output (Max): 80V
• Current - Output / Channel: 50mA
• Operating temperature range: -55°C ~ 110°C
• Input type: DC

Isolation Performance:

• Voltage - Isolation: minimum 5000Vrms

Regulatory Compliance:

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute parts VO618A-2 and VO618A-4 (both manufactured by Vishay Semiconductor Opto Division) meet all mechanical and electrical compatibility criteria. Both devices feature identical package specifications, output voltage/current ratings, operating temperature range, and regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection Criteria:

All three optoisolators (EL817(D)-G, VO618A-2, and VO618A-4) are Active product status components with identical RoHS3 compliance and unlimited moisture sensitivity ratings. All devices are suitable for through-hole PCB assembly with identical 4-DIP package footprints.

Isolation Voltage Consideration:

The VO618A series provides higher isolation voltage (5300Vrms) compared to the EL817(D)-G (5000Vrms). This represents an enhancement in isolation performance and does not restrict substitution in applications designed for the EL817(D)-G.

Current Transfer Ratio Differentiation:

The EL817(D)-G exhibits higher current transfer ratio specifications (300-600% @ 5mA) compared to VO618A-2 (63-125% @ 1mA) and VO618A-4 (160-320% @ 1mA). The VO618A-4 provides intermediate current transfer ratio performance. Selection between VO618A-2 and VO618A-4 depends on input current drive requirements in the specific application circuit.

Switching Speed Consideration:

The VO618A series (both variants) provides faster rise/fall times (2µs, 2µs) compared to the EL817(D)-G (6µs, 8µs). This represents improved switching performance and does not restrict substitution in applications designed for the EL817(D)-G.

Saturation Voltage Consideration:

The EL817(D)-G features lower Vce saturation (200mV max) compared to VO618A series (400mV max). Applications with tight output voltage specifications may require circuit verification when substituting with VO618A variants.

Frequently Asked Questions (FAQ)

Q: Can VO618A-2 and VO618A-4 be used interchangeably with EL817(D)-G?

A: Both VO618A variants are mechanically and electrically compatible substitutes for the EL817(D)-G. All three devices share identical package specifications (4-DIP through-hole), output voltage/current ratings (80V max, 50mA), and operating temperature range (-55°C ~ 110°C). Selection between VO618A-2 and VO618A-4 depends on input current drive requirements, as they differ in current transfer ratio specifications.

Q: What are the key differences between VO618A-2 and VO618A-4?

A: Both VO618A variants are identical in isolation voltage (5300Vrms), output ratings, package type, and compliance status. The primary difference is current transfer ratio: VO618A-2 provides 63-125% @ 1mA, while VO618A-4 provides 160-320% @ 1mA. VO618A-4 is suitable for applications requiring higher current transfer efficiency at lower input currents.

Q: Are there any compliance or regulatory differences between these optoisolators?

A: All three devices (EL817(D)-G, VO618A-2, and VO618A-4) are RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1). All are classified as Active product status. No compliance or regulatory restrictions apply to substitution.

Q: Will substituting EL817(D)-G with VO618A series affect PCB assembly?

A: No. All three optoisolators use identical 4-DIP (0.300", 7.62mm) through-hole packages. PCB footprints, pin assignments, and assembly processes remain unchanged. No PCB redesign is required.

Q: What should be considered when substituting due to Vce saturation differences?

A: The EL817(D)-G has lower Vce saturation (200mV max) compared to VO618A series (400mV max). In applications where output voltage drop is critical, verify that the higher saturation voltage of VO618A variants does not exceed circuit specifications. This is particularly important in low-voltage output applications.

Q: Are the switching speed differences significant for substitution?

A: The VO618A series provides faster rise/fall times (2µs, 2µs) compared to EL817(D)-G (6µs, 8µs). This represents improved switching performance. Applications designed for EL817(D)-G will operate correctly with faster VO618A variants. No circuit modifications are required due to improved speed performance.