EL816(S)(C)(TD)-V Equivalent & Substitute Parts

Part Overview

The EL816(S)(C)(TD)-V 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-SMD surface mount package. The device is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across isolation voltage, current transfer ratio, output characteristics, and thermal operating range specifications.

Substiute Parts

EL816(S)(C)(TD)-V

Everlight Electronics Co LtdIn Stock: 735EL816(S)(C)(TD)-V Datasheet

Current PartRFQ

VO618A-3X017T

Vishay Semiconductor Opto DivisionIn Stock: 41971VO618A-3X017T Datasheet

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VO618A-4X017T

Vishay Semiconductor Opto DivisionIn Stock: 12536VO618A-4X017T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute optoisolators for the EL816(S)(C)(TD)-V 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
• Output current capability of 50mA or greater
• Operating temperature range encompassing -55°C to 110°C
• Current transfer ratio specifications that support the application input current requirements

Mechanical Compatibility Parameters:

• 4-SMD surface mount package with Gull Wing lead configuration
• Identical supplier device package designation

Compliance Parameters:

• Active product status
• RoHS3 compliance
• MSL rating of 1 or equivalent

The substitute parts identified (VO618A-3X017T and VO618A-4X017T) meet these criteria with isolation voltage ratings of 5300Vrms, exceeding the minimum requirement, and maintaining all output and thermal specifications within acceptable ranges.

Parameter Comparison

Engineering Selection Recommendations

EL816(S)(C)(TD)-V (Primary Part)

The EL816(S)(C)(TD)-V remains the primary selection when Everlight Electronics supply chain is preferred. This part is Active status with RoHS3 compliance and MSL 1 rating, suitable for standard manufacturing environments without moisture sensitivity constraints.

VO618A-4X017T (Preferred Substitute)

The VO618A-4X017T is the preferred substitute when Vishay Semiconductor supply is required. This variant provides higher current transfer ratio (160% to 320% @ 1mA) compared to the VO618A-3X017T, offering improved gain margin. Isolation voltage is rated at 5300Vrms, exceeding the 5000Vrms requirement. Active product status, RoHS3 compliance, and MSL 1 rating are maintained. Packaging is Tape & Reel (TR).

VO618A-3X017T (Alternative Substitute)

The VO618A-3X017T is an alternative substitute with lower current transfer ratio (100% to 200% @ 1mA). This variant is suitable for applications where lower gain is acceptable. Isolation voltage is 5300Vrms. Active product status, RoHS3 compliance, and MSL 1 rating are maintained. Packaging is Cut Tape (CT) & Digi-Reel®.

Substitution Constraints:

All three parts share identical electrical output specifications (80V maximum output voltage, 50mA output current, -55°C to 110°C operating temperature) and mechanical compatibility (4-SMD Gull Wing package). The primary differentiation is current transfer ratio performance and packaging format. Vce saturation differs between the EL816 (200mV max) and Vishay variants (400mV max), which may affect switching speed in specific circuit topologies.

Frequently Asked Questions (FAQ)

Q: Can VO618A-4X017T and VO618A-3X017T be used interchangeably with EL816(S)(C)(TD)-V?

A: Both Vishay parts are electrically and mechanically compatible substitutes. The primary differences are current transfer ratio specifications and packaging format. VO618A-4X017T provides higher gain (160-320% @ 1mA) compared to VO618A-3X017T (100-200% @ 1mA). Selection depends on circuit input current requirements and available packaging format.

Q: What is the significance of the current transfer ratio difference between these parts?

A: Current transfer ratio determines the output current relative to input current. The EL816 specifies 200-400% @ 5mA input. The VO618A-4X017T specifies 160-320% @ 1mA input, and VO618A-3X017T specifies 100-200% @ 1mA input. These are measured at different input currents, so direct comparison requires circuit analysis at the actual operating input current.

Q: Are the isolation voltage ratings interchangeable?

A: Yes. The EL816 provides 5000Vrms isolation, while both Vishay substitutes provide 5300Vrms. The higher rating of the Vishay parts exceeds the minimum requirement and provides additional isolation margin.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape (CT) & Digi-Reel® packaging (VO618A-3X017T) is suitable for lower-volume or manual assembly operations. Tape & Reel (TR) packaging (VO618A-4X017T) is optimized for high-volume automated assembly. Both formats contain identical components in the same 4-SMD Gull Wing package.

Q: Are all three parts RoHS3 compliant?

A: Yes. The EL816(S)(C)(TD)-V, VO618A-3X017T, and VO618A-4X017T are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the impact of Vce saturation differences?

A: The EL816 specifies 200mV maximum Vce saturation, while both Vishay substitutes specify 400mV maximum. Lower saturation voltage results in lower output voltage drop during transistor conduction. This difference may affect switching speed and power dissipation in specific circuit topologies and should be evaluated during circuit validation.

Q: Can these parts be used in the same PCB layout without modification?

A: Yes. All three parts use identical 4-SMD Gull Wing package configuration and can be placed in the same PCB footprint without layout modification.