EL817(S1)(TD)-VG Equivalent & Substitute Parts

Part Overview

The EL817(S1)(TD)-VG 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 with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across isolation voltage, current transfer ratio, output characteristics, and package specifications. Alternative models may be required due to inventory availability, packaging format preferences, or supply chain optimization.

Substiute Parts

EL817(S1)(TD)-VG

Everlight Electronics Co LtdIn Stock: 1066EL817(S1)(TD)-VG Datasheet

Current PartRFQ

EL8171S1(TU)-G

Everlight Electronics Co LtdIn Stock: 5131EL8171S1(TU)-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EL817(S1)(TD)-VG is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Isolation voltage: 5000Vrms (no deviation permitted)
• Number of channels: 1 (single channel configuration)
• Current transfer ratio range: 50% minimum and 600% maximum @ 5mA
• Output type: Transistor configuration
• Maximum output voltage: 80V
• Maximum output current per channel: 50mA
• Vce saturation: 200mV maximum
• Rise and fall time: 6µs and 8µs respectively
• Input type: DC
• Forward voltage (Vf): 1.2V typical
• Maximum DC forward current: 60mA

Mechanical Equivalence Criteria:

• Package type: 4-SMD, Gull Wing
• Mounting type: Surface Mount
• Temperature operating range: -55°C to 110°C

Compliance Equivalence Criteria:

• RoHS3 compliance required
• MSL rating: 1 (Unlimited)

Substitute parts must maintain identical electrical performance and mechanical compatibility. Packaging format (Tape & Reel versus other formats) represents a logistics variation that does not affect functional substitution when the underlying component specifications remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

The EL8171S1(TU)-G is a direct functional equivalent to the EL817(S1)(TD)-VG. Both components are manufactured by Everlight Electronics Co Ltd and maintain identical electrical specifications, mechanical dimensions, and compliance certifications.

Selection Basis:

Both parts are Active product status, ensuring continued manufacturing support and supply availability. Both achieve ROHS3 compliance and carry MSL 1 (Unlimited) moisture sensitivity rating, indicating equivalent reliability and handling requirements.

The primary distinction between these parts is packaging format. The EL817(S1)(TD)-VG is supplied in standard packaging, while the EL8171S1(TU)-G is supplied in Tape & Reel (TR) format. This difference reflects logistics and volume handling preferences without affecting component performance or circuit compatibility.

Selection between these equivalent parts should be based on:

• Packaging format requirements for assembly processes
• Inventory availability and lead time
• Supply chain preferences
• Volume requirements and cost considerations

Both parts are suitable for direct substitution in applications requiring 5000Vrms isolation, single-channel transistor output optoisolators with 50mA output current capability and -55°C to 110°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can EL8171S1(TU)-G replace EL817(S1)(TD)-VG in existing designs?

A: Yes. The EL8171S1(TU)-G is electrically and mechanically equivalent to the EL817(S1)(TD)-VG. All critical parameters including isolation voltage, current transfer ratio, output characteristics, package dimensions, and operating temperature range are identical. Direct substitution is supported without circuit modification.

Q: What is the difference between these two part numbers?

A: The primary difference is packaging format. The EL817(S1)(TD)-VG uses standard packaging, while the EL8171S1(TU)-G is supplied in Tape & Reel (TR) format. This affects handling and assembly processes but does not impact electrical performance or component functionality.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the EL817(S1)(TD)-VG and EL8171S1(TU)-G are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both parts meet equivalent environmental and regulatory requirements.

Q: What isolation voltage do these optoisolators provide?

A: Both parts provide 5000Vrms galvanic isolation. This specification is identical across both equivalent parts and cannot be varied through substitution.

Q: What is the maximum output current for these devices?

A: The maximum output current per channel is 50mA for both the EL817(S1)(TD)-VG and EL8171S1(TU)-G. This specification is identical and determines the maximum load current capability in applications.

Q: Can these parts operate at different temperature ranges?

A: No. Both parts operate across the identical temperature range of -55°C to 110°C. Temperature operating range is a fixed specification that does not vary between these equivalent parts.

Q: What is the current transfer ratio specification?

A: Both parts maintain a current transfer ratio between 50% minimum and 600% maximum at 5mA input current. This range is identical for both the EL817(S1)(TD)-VG and EL8171S1(TU)-G.

Q: Are these 4-SMD components suitable for automated assembly?

A: Yes. Both parts use 4-SMD Gull Wing surface mount packaging, which is compatible with standard automated pick-and-place assembly equipment and reflow soldering processes.