K817P9 Optoisolator Equivalent & Substitute Parts

Part Overview

The K817P9 is a 5000Vrms isolation optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The K817P9 provides galvanic isolation in applications requiring high voltage isolation with single-channel transistor output capability.

Substiute Parts

K817P9

Vishay Semiconductor Opto DivisionIn Stock: 12635K817P9 Datasheet

Current PartRFQ

TCET1109

Vishay Semiconductor Opto DivisionIn Stock: 35384TCET1109 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the K817P9 is determined by strict equivalence across the following critical parameters:

• Voltage isolation rating: 5000Vrms
• Number of channels: 1
• Output type: Transistor
• Current transfer ratio range: 200% to 400% @ 5mA
• Maximum output voltage: 70V
• Maximum output current per channel: 50mA
• Package type: 4-DIP (0.300", 7.62mm)
• Mounting type: Through Hole
• Operating temperature range: -40°C ~ 100°C

The TCET1109 meets all these parameters and is the manufacturer-recommended substitute. It maintains identical electrical specifications and mechanical compatibility while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The TCET1109 is the direct equivalent for K817P9 applications. Selection is based on the following factors:

• Both parts are ROHS3 compliant, meeting environmental regulatory requirements
• TCET1109 maintains active product status, ensuring long-term availability and supply chain stability
• Electrical and mechanical parameters are identical, enabling direct pin-for-pin replacement
• Both components share identical moisture sensitivity classification (MSL 1), requiring no changes to handling or storage procedures
• The TCET1109 is available in higher inventory quantities, supporting production continuity

Frequently Asked Questions (FAQ)

Q: Can TCET1109 be used as a direct replacement for K817P9?

A: Yes. The TCET1109 is electrically and mechanically identical to the K817P9 across all specified parameters, including isolation voltage, current transfer ratio, output characteristics, and package dimensions. Direct substitution is possible without circuit modifications.

Q: What is the primary reason to substitute K817P9?

A: The K817P9 is classified as obsolete. The TCET1109 provides an active, equivalent alternative with identical performance specifications and improved long-term availability.

Q: Are there any differences in compliance or certifications?

A: Both parts are ROHS3 compliant. The TCET1109 includes REACH Unaffected status. Both share identical ECCN and HTSUS classifications.

Q: Does the package type differ between these parts?

A: No. Both the K817P9 and TCET1109 use 4-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical compatibility on existing PCB layouts.

Q: Are there any thermal or operating condition differences?

A: No. Both parts operate across the identical temperature range of -40°C to 100°C with matching thermal characteristics.

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

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.