EL817(A)-V Optoisolator Equivalent & Substitute Parts

Part Overview

The EL817(A)-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-DIP package. The device is designed for DC input applications requiring phototransistor output with maximum output voltage of 35V and output current capability of 50mA per channel.

The EL817(A)-V maintains Active product status with 836 pieces in current inventory. Equivalent substitute parts are identified based on matching electrical specifications, isolation voltage rating, package configuration, and compliance certifications to support component procurement flexibility and supply chain continuity.

Substiute Parts

EL817(A)-V

Everlight Electronics Co LtdIn Stock: 909EL817(A)-V Datasheet

Current PartRFQ

140817140110

Würth ElektronikIn Stock: 1279140817140110 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EL817(A)-V are identified through parametric equivalence matching. The substitution logic is based on the following critical parameters that must remain constant across equivalent devices:

Isolation Voltage: 5000Vrms isolation rating is the primary electrical specification defining the optoisolator's safety and performance class.

Channel Configuration: Single channel (1 channel) configuration must be maintained for circuit compatibility.

Current Transfer Ratio Range: 80% minimum to 160% maximum at 5mA input current defines the optical coupling efficiency and must fall within this specification window.

Output Characteristics: Transistor output type with maximum output voltage of 35V and maximum output current of 50mA per channel are fixed electrical boundaries.

Saturation Voltage: Vce saturation maximum of 200mV defines the on-state voltage drop performance.

Package Configuration: 4-DIP through-hole package with 0.300" (7.62mm) body dimensions ensures mechanical and electrical compatibility with existing PCB layouts.

Operating Temperature Range: -55°C to 110°C operating temperature envelope must be supported.

Compliance Standards: ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity are required for regulatory and manufacturing process compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the EL817(A)-V and the 140817140110 maintain Active product status, ensuring continued availability and manufacturing support. Both components carry ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

The 140817140110 (Würth Elektronik) is a parametric equivalent to the EL817(A)-V (Everlight Electronics). All critical electrical specifications match within the defined operating parameters: isolation voltage, channel count, current transfer ratio range, output voltage and current ratings, saturation voltage, and operating temperature envelope are identical.

Minor variations in forward voltage (1.2V versus 1.24V typical) and rise/fall time sequencing (4µs/3µs versus 3µs/4µs) fall within normal manufacturing tolerances and do not affect functional equivalence for standard optoisolator applications.

Both components support identical through-hole PCB mounting in 4-DIP package configuration with unlimited moisture sensitivity classification, enabling direct substitution in existing circuit designs without layout or assembly process modifications.

Frequently Asked Questions (FAQ)

Q: Can the 140817140110 be used as a direct replacement for the EL817(A)-V in existing designs?

A: Yes. The 140817140110 is a parametric equivalent with matching isolation voltage (5000Vrms), channel configuration (1 channel), current transfer ratio range (80%-160% @ 5mA), output specifications (35V max, 50mA max), saturation voltage (200mV max), and operating temperature range (-55°C to 110°C). Both components use identical 4-DIP through-hole packaging.

Q: What are the key parameters that define substitution eligibility for this optoisolator category?

A: Substitution eligibility is determined by: isolation voltage rating, number of channels, current transfer ratio minimum and maximum values, output type (transistor), maximum output voltage, maximum output current per channel, maximum saturation voltage, operating temperature range, and package configuration. All these parameters must match between the main part and substitute part.

Q: Are there any compliance or certification differences between these parts?

A: Both the EL817(A)-V and 140817140110 are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity classification. Both maintain Active product status. No compliance or certification differences exist between these components.

Q: What is the significance of the 4-DIP package specification?

A: The 4-DIP (0.300", 7.62mm) package specification defines the physical footprint and pin configuration for through-hole PCB mounting. Both equivalent parts use this identical package, ensuring mechanical compatibility with existing PCB designs without layout modifications.

Q: Do the minor differences in forward voltage (1.2V vs 1.24V) affect circuit performance?

A: The forward voltage difference of 0.04V falls within normal manufacturing tolerances for optoisolator LED input stages. This variation does not affect functional equivalence or circuit performance in standard applications.

Q: What does the current transfer ratio specification (80%-160% @ 5mA) represent?

A: Current transfer ratio (CTR) defines the ratio of output collector current to input LED current. The 80%-160% range at 5mA input current specifies the optical coupling efficiency window. Both equivalent parts maintain this identical specification range.