EL816(B) Optoisolator Equivalent & Substitute Parts

Part Overview

The EL816(B) is a 5000Vrms isolation optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component is classified as an active product and is designed for applications requiring galvanic isolation between input and output circuits. The EL816(B) is packaged in a 4-DIP through-hole configuration with a single isolation channel and 50mA output current capability. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within the allowed parameter ranges.

Substiute Parts

EL816(B)

Everlight Electronics Co LtdIn Stock: 89476EL816(B) Datasheet

Current PartRFQ

TLP785(F)

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

SimilarRFQ

TLP785(GR-TP6,F)

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

SimilarRFQ

TLP785(Y,F)

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EL816(B) are qualified based on the following criteria:

Electrical Compatibility Requirements:

• Isolation voltage: 5000Vrms (exact match required)
• Number of channels: 1 (exact match required)
• Output type: Transistor (exact match required)
• Maximum output voltage: 80V (exact match required)
• Maximum output current: 50mA (exact match required)
• Input type: DC (exact match required)
• Operating temperature range: -55°C to 110°C (exact match required)

Mechanical Compatibility Requirements:

• Package type: 4-DIP for through-hole mounting applications
• Pin configuration: 4-DIP (0.300", 7.62mm) standard

Compliance Requirements:

• RoHS compliance status (ROHS3 or RoHS Compliant acceptable)
• Moisture Sensitivity Level 1 (Unlimited)

The Current Transfer Ratio, Rise/Fall Time, Vce Saturation, and Forward Voltage parameters vary within acceptable ranges across substitute parts but do not disqualify substitution when all primary electrical and mechanical criteria are met.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Assemblies:

TLP785(F) and TLP785(Y,F) are direct substitutes for the EL816(B) in through-hole mounting applications. Both maintain the 4-DIP package configuration and are compatible with existing PCB layouts designed for the EL816(B). TLP785(F) offers the widest Current Transfer Ratio range (50% to 600% @ 5mA), while TLP785(Y,F) provides a narrower range (50% to 150% @ 5mA). Both are ROHS3 or RoHS compliant and carry Moisture Sensitivity Level 1 rating.

For Surface Mount PCB Assemblies:

TLP785(GR-TP6,F) is a surface-mount alternative with 4-SMD gull-wing package configuration. This part is suitable only for designs that accommodate surface-mount technology and cannot be used as a direct replacement in through-hole applications. The Current Transfer Ratio range (100% to 300% @ 5mA) and electrical specifications remain compatible with the EL816(B) functional requirements.

Compliance Considerations:

All substitute parts maintain RoHS compliance status and Moisture Sensitivity Level 1 rating, ensuring compatibility with modern manufacturing and storage requirements. The EL816(B) carries ROHS3 compliance; substitute parts carry either ROHS3 or RoHS compliance, both acceptable for equivalent applications.

Performance Variations:

The EL816(B) exhibits a Vce Saturation maximum of 200mV, while all Toshiba TLP785 variants specify 400mV maximum. This difference is within acceptable ranges for typical optoisolator applications but should be evaluated in circuits with tight saturation voltage requirements. Rise time on the EL816(B) is 4µs compared to 2µs on TLP785 variants, representing faster switching performance on the substitutes.

Frequently Asked Questions (FAQ)

Q: Can TLP785(GR-TP6,F) be used as a direct replacement for EL816(B) on existing PCBs?

A: No. TLP785(GR-TP6,F) uses surface-mount technology (4-SMD gull-wing package) while EL816(B) uses through-hole technology (4-DIP package). PCB layout and assembly process modifications are required. TLP785(F) or TLP785(Y,F) are appropriate for through-hole applications.

Q: What is the significance of the Current Transfer Ratio differences between EL816(B) and TLP785 variants?

A: Current Transfer Ratio indicates the efficiency of signal transfer from input to output. EL816(B) specifies 130% to 260% @ 5mA, while TLP785 variants range from 50% to 600% @ 5mA depending on the specific variant. All values fall within acceptable operating ranges for standard optoisolator applications. Circuit designs should not depend on specific Current Transfer Ratio values within these ranges.

Q: Are all substitute parts RoHS compliant?

A: Yes. EL816(B) is ROHS3 compliant. TLP785(F) and TLP785(GR-TP6,F) are ROHS3 compliant. TLP785(Y,F) is RoHS compliant. All meet modern environmental and regulatory requirements.

Q: What is Moisture Sensitivity Level 1?

A: Moisture Sensitivity Level 1 (Unlimited) indicates the component has unlimited shelf life and does not require special moisture-controlled storage or handling procedures. All parts in this comparison carry this rating.

Q: How do the switching times compare between EL816(B) and TLP785 variants?

A: EL816(B) specifies rise time of 4µs and fall time of 3µs. TLP785 variants specify rise time of 2µs and fall time of 3µs. TLP785 variants offer faster rise time performance. For applications with strict timing requirements, this difference should be evaluated against circuit specifications.

Q: Can I mix EL816(B) and TLP785 parts in the same design?

A: Yes, provided the application does not depend on specific Current Transfer Ratio values or switching time characteristics. Both maintain identical isolation voltage, output voltage, output current, operating temperature range, and package compatibility (for through-hole variants). Circuit-level testing is not required for standard optoisolator applications.

Q: What is the difference between TLP785(F) and TLP785(Y,F)?

A: Both are 4-DIP through-hole packages from Toshiba. TLP785(F) specifies Current Transfer Ratio of 50% to 600% @ 5mA. TLP785(Y,F) specifies a narrower range of 50% to 150% @ 5mA. Selection depends on whether the application requires the wider performance range offered by TLP785(F).