EL817(B)-V Optoisolator Equivalent & Substitute Parts

Part Overview

The EL817(B)-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 in active production status with 859 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, supply chain continuity, or inventory management purposes.

Substiute Parts

EL817(B)-V

Everlight Electronics Co LtdIn Stock: 961EL817(B)-V Datasheet

Current PartRFQ

140817140210

Würth ElektronikIn Stock: 1165140817140210 Datasheet

Parametric EquivalentRFQ

Q817B

QT Brightek (QTB)In Stock: 1744Q817B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EL817(B)-V are qualified based on strict equivalence of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Isolation voltage: 5000Vrms
• Number of channels: 1
• Output type: Transistor
• Current transfer ratio range: 130% to 260% @ 5mA
• Maximum output voltage: 35V
• Maximum output current: 50mA per channel
• Vce saturation: 200mV maximum
• Operating temperature range: -55°C to 110°C
• Package configuration: 4-DIP (0.300", 7.62mm)
• Mounting type: Through Hole
• Input type: DC

All identified substitute parts meet these parameters without exception. Variations in rise/fall time and forward voltage are within acceptable tolerances for this component category and do not affect functional substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: EL817(B)-V

• Manufacturer: Everlight Electronics Co Ltd
• Status: Active production
• Compliance: ROHS3 Compliant
• Inventory: 859 units available
• Suitable for new designs and production applications

Substitute 1: 140817140210

• Manufacturer: Würth Elektronik
• Series: WL-OCPT
• Status: Active production
• Compliance: ROHS3 Compliant, REACH Unaffected
• Inventory: 1093 units available
• Electrical equivalence: Full parameter match
• Timing characteristics: Rise/fall times 3µs/4µs (slightly faster than primary part)

Substitute 2: Q817B

• Manufacturer: QT Brightek (QTB)
• Series: Q817
• Status: Active production
• Compliance: ROHS3 Compliant, REACH Unaffected
• Inventory: 1717 units available
• Electrical equivalence: Full parameter match
• Timing characteristics: Rise/fall times 6µs/8µs (slightly slower than primary part)

All three parts are pin-compatible in 4-DIP through-hole applications and meet identical electrical specifications for isolation voltage, current transfer ratio, output voltage/current ratings, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the 140817140210 (Würth Elektronik) be used as a direct replacement for the EL817(B)-V?

A: Yes. The 140817140210 meets all electrical and mechanical parameters of the EL817(B)-V. Both components provide 5000Vrms isolation, identical current transfer ratio specifications (130% to 260% @ 5mA), 50mA output current capability, and 4-DIP through-hole packaging. The rise/fall time difference (3µs/4µs versus 4µs/3µs) is within acceptable tolerance for this component category.

Q: What are the differences between the Q817B and the EL817(B)-V?

A: The Q817B is electrically equivalent to the EL817(B)-V in all critical parameters: isolation voltage, current transfer ratio, output voltage/current ratings, and operating temperature range. The primary difference is timing performance, with the Q817B exhibiting slower rise/fall times (6µs/8µs compared to 4µs/3µs). This difference does not affect functional substitution in standard optoisolator applications.

Q: Are all three parts physically compatible in the same PCB footprint?

A: Yes. All three parts use identical 4-DIP (0.300", 7.62mm) through-hole packaging. Pin configuration and mechanical dimensions are equivalent, allowing direct PCB footprint compatibility.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. The EL817(B)-V, 140817140210, and Q817B are all ROHS3 Compliant. The Würth Elektronik and QT Brightek parts additionally carry REACH Unaffected status. All parts are classified under ECCN EAR99 and HTSUS 8541.49.8000.

Q: What is the moisture sensitivity level for these parts?

A: The EL817(B)-V and 140817140210 both carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The Q817B is listed as MSL Not Applicable.

Q: Can these parts be used interchangeably in high-speed switching applications?

A: Substitution depends on timing requirements. The EL817(B)-V and 140817140210 have comparable rise/fall times (4µs/3µs and 3µs/4µs respectively). The Q817B has slower timing (6µs/8µs) and may not be suitable for applications requiring faster switching response.

Q: What inventory levels are available for each part?

A: EL817(B)-V: 859 units; 140817140210: 1093 units; Q817B: 1717 units. All parts are listed as new original stock.