TPC817MD C9G Equivalent & Substitute Parts

Part Overview

The TPC817MD C9G 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-DIP through-hole package. The device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across isolation voltage, current transfer ratio, output characteristics, and thermal operating range.

Substiute Parts

TPC817MD C9G

Taiwan Semiconductor CorporationIn Stock: 741TPC817MD C9G Datasheet

Current PartRFQ

EL817(M)(D))-VG

Everlight Electronics Co LtdIn Stock: 921EL817(M)(D))-VG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPC817MD C9G is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage - Isolation: 5000Vrms
• Number of Channels: 1
• Output Type: Transistor
• Package / Case: 4-DIP (0.400", 10.16mm)
• Mounting Type: Through Hole

Compatible Parameter Ranges:

• Current Transfer Ratio (Min): 300% @ 5mA or greater
• Current Transfer Ratio (Max): 600% @ 5mA or greater
• Voltage - Output (Max): 80V or greater
• Current - Output / Channel: 50mA or greater
• Vce Saturation (Max): 200mV or less

Compliance Requirements:

• RoHS3 Compliant status required

The EL817(M)(D))-VG manufactured by Everlight Electronics Co Ltd meets all mandatory matching parameters and compatible parameter ranges, qualifying it as a direct substitute for the obsolete TPC817MD C9G.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: EL817(M)(D))-VG

The EL817(M)(D))-VG is the qualified substitute for the obsolete TPC817MD C9G based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match or exceed the original specification. Isolation voltage, current transfer ratio, output voltage, output current, and saturation voltage are identical. The substitute maintains full functional compatibility in isolation and switching applications.

Package and Mounting Compatibility: Both devices use identical 4-DIP through-hole packaging (0.400", 10.16mm), ensuring direct PCB footprint compatibility without layout modifications.

Compliance Status: Both components maintain ROHS3 compliance, satisfying environmental and regulatory requirements. The substitute is actively produced, ensuring long-term availability and supply chain stability compared to the obsolete original part.

Operating Temperature Advantage: The EL817(M)(D))-VG provides an extended operating temperature range (-55°C ~ 110°C) compared to the TPC817MD C9G (-40°C ~ 100°C), offering broader thermal application flexibility.

Timing Characteristics: The substitute exhibits slightly slower rise and fall times (6µs, 8µs versus 4µs, 3µs). This difference is acceptable for DC input optoisolator applications where switching speed is not a critical constraint. Applications requiring the original faster timing characteristics require detailed circuit analysis.

Frequently Asked Questions (FAQ)

Q: Can the EL817(M)(D))-VG be used as a direct replacement for the TPC817MD C9G without PCB modifications?

A: Yes. Both devices use identical 4-DIP through-hole packaging with 0.400" (10.16mm) pin spacing. Direct pin-for-pin substitution is possible without PCB layout changes.

Q: What are the key electrical differences between these parts?

A: The primary differences are rise/fall time (substitute is slower by 2-5µs) and maximum DC forward current (substitute rated 60mA versus 50mA). All isolation, transfer ratio, output voltage, and saturation specifications are identical.

Q: Is the EL817(M)(D))-VG suitable for high-speed switching applications?

A: The EL817(M)(D))-VG has rise and fall times of 6µs and 8µs respectively. Applications requiring faster switching response should evaluate timing requirements against these specifications.

Q: Does the wider operating temperature range of the EL817(M)(D))-VG affect circuit design?

A: The extended range (-55°C ~ 110°C versus -40°C ~ 100°C) provides additional thermal margin. No circuit design changes are required; the substitute operates within the original part's temperature envelope and beyond.

Q: Are both parts RoHS compliant?

A: Yes. Both the TPC817MD C9G and EL817(M)(D))-VG are ROHS3 compliant, meeting environmental and regulatory standards.

Q: What is the availability status of each part?

A: The TPC817MD C9G is obsolete. The EL817(M)(D))-VG is actively produced by Everlight Electronics Co Ltd, ensuring ongoing availability and supply chain continuity.

Q: Can the EL817(M)(D))-VG handle the same isolation voltage as the original part?

A: Yes. Both devices provide 5000Vrms isolation voltage, maintaining identical galvanic isolation performance.

Q: Are there any input or output type differences between these optoisolators?

A: No. Both devices feature DC input type and transistor output type, ensuring functional equivalence in isolation and switching circuit applications.