EL817(M)(B) Optoisolator Equivalent & Substitute Parts

Part Overview

The EL817(M)(B) is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides galvanic isolation up to 5000Vrms and is designed for applications requiring DC input signal isolation with transistor-based output switching. The part is currently in active production status with 1061 units in stock. Substitute parts are identified when equivalent electrical performance, isolation rating, package form factor, and operational temperature range are maintained across different manufacturers.

Substiute Parts

EL817(M)(B)

Everlight Electronics Co LtdIn Stock: 1103EL817(M)(B) Datasheet

Current PartRFQ

140817141210

Würth ElektronikIn Stock: 1162140817141210 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Critical Matching Parameters:

• Isolation voltage rating: 5000Vrms
• Number of channels: 1
• Current transfer ratio range: 130% to 260% @ 5mA
• Output type: Transistor
• Maximum output voltage: 35V
• Maximum output current: 50mA
• Vce saturation: 200mV maximum
• Operating temperature range: -55°C to 110°C
• Package form factor: 4-DIP (0.400", 10.16mm)
• Mounting type: Through Hole
• Input type: DC

The substitute part 140817141210 from Würth Elektronik meets all critical electrical specifications and maintains identical package dimensions and mounting characteristics. Minor variations in rise/fall time (3µs, 4µs versus 4µs, 3µs) and forward voltage (1.24V versus 1.2V) remain within acceptable tolerance bands for this component category and do not affect functional interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Both the EL817(M)(B) and 140817141210 are active production components with ROHS3 compliance and identical regulatory classifications (ECCN EAR99, HTSUS 8541.49.8000). Selection between these parts should be based on:

Availability and Lead Time: The EL817(M)(B) has 1061 units in stock; the 140817141210 has 1069 units in stock. Both maintain adequate inventory levels.

Compliance Requirements: Both parts meet ROHS3 compliance and carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.

Packaging and Logistics: The EL817(M)(B) is supplied in standard packaging; the 140817141210 is supplied in Tube packaging. Verify tube packaging compatibility with your assembly process if this is a selection criterion.

Electrical Performance: All critical electrical parameters are equivalent. The minor differences in rise/fall time sequencing (4µs/3µs versus 3µs/4µs) and forward voltage (1.2V versus 1.24V) do not affect functional interchangeability in standard isolation applications.

Frequently Asked Questions (FAQ)

Q: Can the 140817141210 be used as a direct replacement for the EL817(M)(B) in existing designs?

A: Yes. Both parts maintain identical isolation voltage (5000Vrms), current transfer ratio range (130-260% @ 5mA), output voltage/current ratings (35V, 50mA), and package form factor (4-DIP, 0.400"). The electrical performance is equivalent for DC input isolation applications.

Q: What are the differences between these two parts?

A: The primary differences are manufacturer (Everlight versus Würth Elektronik) and packaging format (standard versus Tube). Electrical specifications are equivalent. Rise/fall time values are sequenced differently (4µs/3µs versus 3µs/4µs) and forward voltage differs by 0.04V (1.2V versus 1.24V), both within acceptable tolerance for this component category.

Q: Are there any temperature or environmental limitations that would prevent substitution?

A: No. Both parts operate across the identical temperature range (-55°C to 110°C) and carry the same MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints.

Q: Does the Tube packaging of the 140817141210 affect compatibility?

A: Tube packaging affects logistics and handling but not electrical compatibility. Verify that your assembly process can accommodate tube-packaged components if this is a consideration for procurement.

Q: Are both parts RoHS compliant?

A: Yes. Both the EL817(M)(B) and 140817141210 are ROHS3 compliant and carry identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications.

Q: What isolation voltage do these parts provide?

A: Both parts provide 5000Vrms isolation, suitable for applications requiring high-voltage galvanic separation between input and output circuits.

Q: Can these parts handle the same output current?

A: Yes. Both parts are rated for 50mA maximum output current per channel with identical Vce saturation characteristics (200mV maximum).