EL816(Y) Optoisolator Equivalent & Substitute Parts

Part Overview

The EL816(Y) is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation in a 4-DIP through-hole package, designed for single-channel DC input applications with 50mA output current capability. The part is currently active in production with 763 units in stock. Substitute parts are identified when equivalent electrical performance, isolation rating, package compatibility, and compliance certifications align with application requirements.

Substiute Parts

EL816(Y)

Everlight Electronics Co LtdIn Stock: 827EL816(Y) Datasheet

Current PartRFQ

TLP785(F)

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

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TLP785(GR-TP6,F)

Toshiba Semiconductor and StorageIn Stock: 13910TLP785(GR-TP6,F) Datasheet

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TLP785(Y,F)

Toshiba Semiconductor and StorageIn Stock: 1021TLP785(Y,F) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EL816(Y) is determined by the following criteria:

Mandatory Matching Parameters:

• Voltage - Isolation: 5000Vrms
• 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

Package Compatibility Considerations:

• Through-hole mounted parts in 4-DIP package are direct substitutes for the EL816(Y)
• Surface-mount variants (4-SMD) require different assembly processes and are listed separately

Compliance Requirements:

• RoHS3 compliance or equivalent environmental certification required

The three identified substitute parts meet these mandatory criteria with variations in Current Transfer Ratio ranges and Vce Saturation specifications that remain within acceptable operational bounds for typical isolation applications.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Assembly (Direct Package Substitutes):

TLP785(Y,F) and TLP785(F) are functionally equivalent to EL816(Y) in 4-DIP through-hole configuration. Both maintain 5000Vrms isolation, 80V maximum output voltage, and 50mA output current specifications. The primary difference is Vce Saturation: EL816(Y) specifies 200mV maximum while TLP785 variants specify 400mV maximum. This parameter difference is acceptable in applications where output saturation voltage is not a critical design constraint. Both substitute parts carry RoHS compliance certification suitable for modern manufacturing environments.

For Surface-Mount PCB Assembly (Package Variant):

TLP785(GR-TP6,F) provides equivalent electrical performance in 4-SMD surface-mount configuration. This variant is selected only when surface-mount assembly is required. The Current Transfer Ratio range (100% to 300% @ 5mA) aligns with EL816(Y) specifications. Highest inventory availability (13874 units) supports production volume requirements.

Compliance and Regulatory Considerations:

All substitute parts maintain RoHS compliance status required for regulated markets. EL816(Y) and TLP785(F) carry ROHS3 designation. Selection should align with specific regional compliance requirements of the end application.

Frequently Asked Questions (FAQ)

Q: Can TLP785(Y,F) or TLP785(F) directly replace EL816(Y) on existing PCBs?

A: Yes, for through-hole mounted applications. Both parts use identical 4-DIP (0.300", 7.62mm) package dimensions and pin configurations. No PCB layout modifications are required. Electrical performance is equivalent across isolation voltage, output current, and operating temperature range.

Q: What is the significance of the Vce Saturation difference between EL816(Y) (200mV) and TLP785 variants (400mV)?

A: Vce Saturation represents the collector-emitter voltage when the transistor output is fully saturated. EL816(Y) specifies a lower maximum value (200mV) compared to TLP785 variants (400mV). In applications where output voltage drop is critical to circuit performance, this difference must be evaluated. For most isolation applications, both specifications are acceptable.

Q: When should TLP785(GR-TP6,F) be selected instead of through-hole variants?

A: TLP785(GR-TP6,F) is selected exclusively for surface-mount PCB assembly processes. This variant uses 4-SMD gull-wing package configuration and tape & reel packaging format. Selection depends on manufacturing process capability, not electrical performance.

Q: Are all substitute parts RoHS compliant?

A: Yes. EL816(Y) is ROHS3 compliant. TLP785(Y,F) and TLP785(F) are RoHS compliant. TLP785(GR-TP6,F) is RoHS compliant. All parts meet environmental compliance requirements for regulated markets.

Q: What is the Current Transfer Ratio and why does it vary among these parts?

A: Current Transfer Ratio (CTR) defines the ratio of output collector current to input LED current, expressed as a percentage. EL816(Y) specifies 150% to 300% @ 5mA. TLP785 variants show different ranges: TLP785(Y,F) specifies 50% to 150%, TLP785(F) specifies 50% to 600%, and TLP785(GR-TP6,F) specifies 100% to 300%. These variations reflect different device binning and manufacturing processes. Selection should confirm CTR range compatibility with circuit design requirements.

Q: Is inventory availability a factor in part selection?

A: Inventory levels are provided for reference: EL816(Y) has 763 units, TLP785(Y,F) has 966 units, TLP785(F) has 2332 units, and TLP785(GR-TP6,F) has 13874 units. Availability should be evaluated against production volume and lead-time requirements, but does not affect electrical substitution eligibility.