TPC817S1C RAG Equivalent & Substitute Parts

Part Overview

The TPC817S1C RAG is a 5000Vrms optoisolator with transistor output manufactured by Taiwan Semiconductor Corporation. This component provides galvanic isolation for single-channel DC input applications with a 4-SOP surface mount package. The device is classified as obsolete, necessitating identification of functionally equivalent active alternatives to support ongoing design requirements and procurement needs.

Substiute Parts

TPC817S1C RAG

Taiwan Semiconductor CorporationIn Stock: 998TPC817S1C RAG Datasheet

Current PartRFQ

EL817(S1)(C)(TD)-G

Everlight Electronics Co LtdIn Stock: 803EL817(S1)(C)(TD)-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPC817S1C RAG is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Isolation voltage: 5000Vrms
• Number of channels: 1
• Output type: Transistor
• Current transfer ratio range: 200% to 400% @ 5mA
• Maximum output voltage: 80V
• Maximum output current: 50mA per channel
• Vce saturation: 200mV maximum
• Package configuration: 4-SMD, Gull Wing surface mount

Acceptable Variation Parameters:

• Operating temperature range (substitute may exceed original range)
• Rise/fall time specifications (substitute may differ within functional tolerance)
• Forward current rating (substitute may exceed original specification)
• Product status (active substitutes preferred for obsolete parts)

The EL817(S1)(C)(TD)-G from Everlight Electronics Co Ltd meets all mandatory matching criteria and qualifies as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The EL817(S1)(C)(TD)-G is a qualified substitute for the obsolete TPC817S1C RAG based on the following engineering criteria:

Electrical Equivalence: Both devices maintain identical isolation voltage (5000Vrms), current transfer ratio specifications (200-400% @ 5mA), output voltage/current ratings (80V, 50mA), and saturation voltage (200mV maximum). These parameters define the functional performance envelope for optoisolator applications.

Package Compatibility: Both components utilize 4-SMD Gull Wing surface mount packaging, enabling direct PCB layout compatibility without redesign.

Compliance Status: The EL817(S1)(C)(TD)-G maintains ROHS3 compliance and MSL Level 1 rating, matching the environmental and regulatory requirements of the original part.

Product Availability: The substitute part carries active product status with current inventory availability, eliminating supply chain risk associated with the obsolete TPC817S1C RAG.

Performance Considerations: The EL817(S1)(C)(TD)-G exhibits slightly slower rise/fall times (6µs/8µs versus 4µs/3µs) and higher maximum forward current (60mA versus 50mA). These variations remain within acceptable tolerance for standard optoisolator applications. The extended operating temperature range (-55°C to 110°C) provides additional thermal margin compared to the original specification (-40°C to 100°C).

Frequently Asked Questions (FAQ)

Q: Can the EL817(S1)(C)(TD)-G be used as a direct replacement for the TPC817S1C RAG without circuit modification?

A: Yes. Both devices share identical isolation voltage, current transfer ratio, output voltage/current ratings, and package configuration. Direct substitution is supported at the component level without circuit redesign.

Q: What is the significance of the different rise/fall times between these parts?

A: The TPC817S1C RAG specifies 4µs rise and 3µs fall times, while the EL817(S1)(C)(TD)-G specifies 6µs rise and 8µs fall times. This difference affects switching speed in high-frequency applications. Applications operating below the switching frequency limits of the substitute part experience no functional impact.

Q: Why is the EL817(S1)(C)(TD)-G rated for higher maximum forward current (60mA versus 50mA)?

A: The higher forward current rating on the substitute part represents an expanded specification envelope. This does not affect compatibility; the circuit design should continue to operate within the original 50mA specification to maintain design margins.

Q: Are there any PCB layout considerations when substituting these parts?

A: No. Both components use identical 4-SMD Gull Wing packaging. Existing PCB layouts, footprints, and assembly processes require no modification.

Q: What is the impact of the extended operating temperature range on the substitute part?

A: The EL817(S1)(C)(TD)-G operates from -55°C to 110°C compared to the original -40°C to 100°C range. This extended range provides additional thermal margin and supports applications requiring operation at lower or higher temperatures without component change.

Q: Are both parts RoHS compliant?

A: Yes. Both the TPC817S1C RAG and EL817(S1)(C)(TD)-G are ROHS3 compliant with MSL Level 1 moisture sensitivity rating.

Q: Why is the original part classified as obsolete?

A: Product obsolescence reflects manufacturer discontinuation decisions. The EL817(S1)(C)(TD)-G maintains active production status, ensuring long-term availability and supply chain continuity.