EL817(M)(C)-VG Equivalent & Substitute Parts

Part Overview

The EL817(M)(C)-VG is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation voltage in a 4-DIP through-hole package and is designed for DC input applications requiring galvanic isolation. The part is currently active in production with 806 units in stock. Substitute parts are identified based on matching electrical specifications, isolation voltage ratings, output characteristics, and package compatibility to ensure functional equivalence in circuit applications.

Substiute Parts

EL817(M)(C)-VG

Everlight Electronics Co LtdIn Stock: 845EL817(M)(C)-VG Datasheet

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TLP785(BL,F)

Toshiba Semiconductor and StorageIn Stock: 6014TLP785(BL,F) Datasheet

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TLP785(F)

Toshiba Semiconductor and StorageIn Stock: 2426TLP785(F) Datasheet

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TLP785(GR,F)

Toshiba Semiconductor and StorageIn Stock: 3126TLP785(GR,F) 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(M)(C)-VG are qualified based on the following criteria:

Electrical Compatibility: All substitute parts maintain the same isolation voltage rating (5000Vrms minimum), single-channel transistor output configuration, 80V maximum output voltage, and 50mA maximum output current per channel.

Current Transfer Ratio: Substitute parts must operate within ranges that overlap or exceed the EL817(M)(C)-VG specification of 200-400% @ 5mA. Parts with broader CTR ranges accommodate the same application requirements.

Package and Mounting: All substitutes use 4-DIP through-hole mounting, ensuring mechanical and electrical compatibility with existing PCB layouts.

Operating Temperature: All substitutes maintain the -55°C to 110°C operating range.

Input Characteristics: All substitutes accept DC input signals matching the EL817(M)(C)-VG input type.

The identified substitutes are: TLP785(GR,F), TLP785(BL,F), TLP785(F), VO618A-4, and VO618A-2.

Parameter Comparison

Engineering Selection Recommendations

TLP785(GR,F) - Toshiba Semiconductor: This substitute maintains 5000Vrms isolation voltage with CTR range of 100-300% @ 5mA. RoHS compliant with MSL 1 rating. Faster switching characteristics (2µs/3µs rise/fall time) compared to the EL817(M)(C)-VG. Package dimensions are 4-DIP (0.300", 7.62mm), which is mechanically compatible with through-hole PCB layouts designed for the EL817(M)(C)-VG.

TLP785(BL,F) - Toshiba Semiconductor: This substitute provides 5000Vrms isolation with CTR range of 200-600% @ 5mA, directly matching the minimum CTR specification of the EL817(M)(C)-VG. RoHS compliant. Switching performance is 2µs/3µs rise/fall time. 4-DIP (0.300", 7.62mm) package.

TLP785(F) - Toshiba Semiconductor: This substitute offers 5000Vrms isolation with CTR range of 50-600% @ 5mA. ROHS3 compliant with REACH Unaffected status. Switching characteristics are 2µs/3µs rise/fall time. 4-DIP (0.300", 7.62mm) package. Broader CTR range accommodates wider application tolerance windows.

VO618A-4 - Vishay Semiconductor Opto Division: This substitute provides 5300Vrms isolation voltage, exceeding the EL817(M)(C)-VG specification. CTR range is 160-320% @ 1mA. ROHS3 compliant with REACH Unaffected status. Switching performance is 2µs/2µs rise/fall time. 4-DIP (0.300", 7.62mm) package. Higher isolation voltage provides additional safety margin.

VO618A-2 - Vishay Semiconductor Opto Division: This substitute provides 5300Vrms isolation voltage with CTR range of 63-125% @ 1mA. ROHS3 compliant with REACH Unaffected status. Switching performance is 2µs/2µs rise/fall time. 4-DIP (0.300", 7.62mm) package. Lower CTR range requires verification for applications with specific current transfer requirements.

All substitutes are active products with confirmed inventory availability and meet regulatory compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the TLP785 series directly replace the EL817(M)(C)-VG in existing designs?

A: Yes, the TLP785(GR,F), TLP785(BL,F), and TLP785(F) are electrically compatible substitutes. All maintain 5000Vrms isolation voltage, single-channel transistor output, 80V maximum output voltage, and 50mA maximum output current. The 4-DIP through-hole package is mechanically compatible. However, note that the TLP785 series has a smaller package body dimension (0.300" vs 0.400"), which may affect PCB layout spacing in designs with tight component placement.

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

A: Both VO618A variants provide 5300Vrms isolation voltage and use the same 4-DIP package. The primary difference is the Current Transfer Ratio specification: VO618A-4 has a CTR range of 160-320% @ 1mA, while VO618A-2 has a CTR range of 63-125% @ 1mA. Selection depends on the required current transfer characteristics for the specific application.

Q: Are there package dimension differences between the EL817(M)(C)-VG and substitute parts?

A: Yes. The EL817(M)(C)-VG uses a 4-DIP package with 0.400" (10.16mm) body dimension. All identified substitutes use 4-DIP packages with 0.300" (7.62mm) body dimension. Both are through-hole mounted and compatible with standard DIP sockets, but PCB hole spacing and component clearance should be verified for designs with minimal spacing.

Q: Which substitute has the fastest switching response?

A: The VO618A-4 and VO618A-2 both provide the fastest switching characteristics with 2µs rise time and 2µs fall time. The TLP785 series provides 2µs rise time and 3µs fall time. The EL817(M)(C)-VG has 6µs rise time and 8µs fall time. Selection should be based on circuit timing requirements.

Q: Do all substitutes meet RoHS compliance requirements?

A: Yes. The EL817(M)(C)-VG is ROHS3 compliant. TLP785(GR,F) and TLP785(BL,F) are RoHS compliant. TLP785(F), VO618A-4, and VO618A-2 are all ROHS3 compliant. All parts have MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the significance of the Current Transfer Ratio (CTR) specification?

A: CTR defines the ratio of output collector current to input LED current. The EL817(M)(C)-VG specifies 200-400% CTR @ 5mA. Substitutes with overlapping or broader CTR ranges ensure compatible signal transfer characteristics. Parts with lower minimum CTR (such as TLP785(F) at 50%) may require circuit design verification for applications sensitive to minimum current transfer performance.

Q: Can the VO618A series be used in applications requiring exactly 5000Vrms isolation?

A: Yes. The VO618A series provides 5300Vrms isolation voltage, which exceeds the 5000Vrms requirement. Higher isolation voltage is functionally compatible and provides additional safety margin. No circuit modifications are required.