EL817(C)-V Optoisolator Equivalent & Substitute Parts

Part Overview

The EL817(C)-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 part is currently active in production with 1080 pieces in stock inventory.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to supply constraints, regional availability, or inventory management. The substitute parts listed maintain electrical and mechanical compatibility within the specified parameter ranges for this optoisolator category.

Substiute Parts

EL817(C)-V

Everlight Electronics Co LtdIn Stock: 1099EL817(C)-V Datasheet

Current PartRFQ

140817140310

Würth ElektronikIn Stock: 1063140817140310 Datasheet

Parametric EquivalentRFQ

Q817C

QT Brightek (QTB)In Stock: 1279Q817C Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EL817(C)-V optoisolator are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

• Voltage isolation rating: 5000Vrms
• Number of channels: 1
• Current transfer ratio range: 200% to 400% @ 5mA
• Output type: Transistor
• Maximum output voltage: 35V
• Maximum output current per channel: 50mA
• Maximum Vce saturation: 200mV
• Operating temperature range: -55°C to 110°C
• Package type: 4-DIP (0.300", 7.62mm)
• Mounting type: Through Hole

All substitute parts listed meet these electrical and mechanical specifications. Variations in secondary parameters such as rise/fall time and forward voltage remain within acceptable tolerances for this component category.

Parameter Comparison

Engineering Selection Recommendations

All three optoisolator parts listed—EL817(C)-V, 140817140310, and Q817C—are active production components with ROHS3 compliance. Selection between these parts should be based on the following factors:

Product Status and Availability: All parts maintain active production status. Current inventory levels are: EL817(C)-V (1080 pcs), 140817140310 (1012 pcs), and Q817C (1252 pcs).

Compliance and Certifications: All three parts are ROHS3 compliant. The 140817140310 and Q817C carry REACH Unaffected status. The EL817(C)-V has Moisture Sensitivity Level 1 (Unlimited), while Q817C lists MSL as Not Applicable.

Electrical Performance: All parts meet the specified isolation voltage, current transfer ratio, output voltage, output current, and saturation voltage requirements. Rise and fall time specifications vary slightly: EL817(C)-V (4µs rise, 3µs fall), 140817140310 (3µs rise, 4µs fall), and Q817C (6µs rise, 8µs fall). Forward voltage specifications are equivalent within 0.04V tolerance.

Package and Mounting: All parts use identical 4-DIP through-hole packaging with 0.300" (7.62mm) spacing, ensuring direct mechanical compatibility in existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the 140817140310 (Würth Elektronik) be used as a direct replacement for the EL817(C)-V (Everlight)?

A: Yes. Both parts meet identical electrical specifications for isolation voltage (5000Vrms), current transfer ratio (200-400% @ 5mA), output voltage (35V max), output current (50mA), and saturation voltage (200mV max). Both use 4-DIP through-hole packaging. Rise and fall time specifications are equivalent within acceptable tolerances (3-4µs range).

Q: What are the differences between the Q817C and the EL817(C)-V?

A: The Q817C meets all critical electrical parameters identically. The primary difference is rise and fall time specification: Q817C specifies 6µs rise and 8µs fall time compared to EL817(C)-V at 4µs rise and 3µs fall time. This represents a slower switching response in the Q817C. Forward voltage is equivalent (1.24V vs 1.2V). All other parameters including isolation voltage, current transfer ratio, output ratings, and package type are identical.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 4-DIP (0.300", 7.62mm) through-hole package with identical pin configuration. Direct PCB substitution is mechanically and electrically feasible without layout modifications.

Q: Which part should be selected for applications requiring the fastest switching response?

A: The EL817(C)-V and 140817140310 both provide faster switching response with rise/fall times in the 3-4µs range. The Q817C specifies 6µs rise and 8µs fall time, making it slower. Selection should be based on circuit timing requirements and availability.

Q: Do all parts meet RoHS compliance requirements?

A: Yes. All three parts are ROHS3 compliant. The 140817140310 and Q817C additionally carry REACH Unaffected status.

Q: What is the significance of the Moisture Sensitivity Level (MSL) specification?

A: The EL817(C)-V specifies MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. The Q817C lists MSL as Not Applicable. The 140817140310 does not specify MSL in the provided data. For applications with extended storage or high-humidity environments, the EL817(C)-V MSL 1 rating provides explicit confirmation of unlimited moisture tolerance.

Q: Can these parts be used interchangeably in existing designs without circuit modification?

A: Yes, for most applications. All three parts meet identical critical electrical specifications and use the same package. However, applications with strict timing requirements should account for the rise/fall time differences between Q817C (6µs/8µs) and the other two parts (3-4µs range). Circuit validation is recommended for timing-critical applications.