K817P1 Optoisolator Transistor Output 5000Vrms Equivalent & Substitute Parts

Part Overview

The K817P1 is a 5000Vrms optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The K817P1 features a single-channel configuration in a 4-DIP through-hole package with a 50mA output current capability and 40-80% current transfer ratio at 10mA input.

Substiute Parts

K817P1

Vishay Semiconductor Opto DivisionIn Stock: 12788K817P1 Datasheet

Current PartRFQ

VO617A-1

Vishay Semiconductor Opto DivisionIn Stock: 1760VO617A-1 Datasheet

MFR RecommendedRFQ

TCET1201

Vishay Semiconductor Opto DivisionIn Stock: 2016TCET1201 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the K817P1 are classified based on the following substitution criteria:

MFR Recommended Substitute (VO617A-1): This part maintains the same physical package (4-DIP through-hole), identical output type (transistor), and equivalent channel configuration (1 channel). The isolation voltage is higher at 5300Vrms, and the product status is active, making it suitable for direct replacement in new designs. The current transfer ratio specifications are compatible at the same measurement points.

Parametric Equivalent (TCET1201): This part provides identical electrical specifications to the K817P1, including 5000Vrms isolation voltage, 40-80% current transfer ratio at 10mA, and matching output voltage and current ratings. The package and mounting type are identical. The product status is active, providing long-term availability.

Substitution logic is based on: package compatibility (4-DIP through-hole), isolation voltage rating (5000Vrms minimum), current transfer ratio range (40-80%), output type (transistor), maximum output voltage (70V minimum), output current capability (50mA), and operating temperature range coverage.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement in Existing Designs: The TCET1201 provides identical electrical and thermal specifications to the K817P1 with active product status, ensuring long-term availability and supply chain continuity. This part is the preferred choice when electrical performance must remain unchanged.

For New Designs with Enhanced Performance: The VO617A-1 offers higher isolation voltage (5300Vrms vs. 5000Vrms), faster switching characteristics (3µs turn-on vs. 6µs), and an extended operating temperature range (-55°C to 110°C vs. -40°C to 100°C). This part is suitable when design margins or environmental requirements exceed the K817P1 specifications.

Both substitute parts are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity classification, matching the original part's environmental compliance profile. All three parts are manufactured by Vishay Semiconductor Opto Division, ensuring consistent quality and documentation standards.

Frequently Asked Questions (FAQ)

Q: Can the VO617A-1 be used as a direct replacement for the K817P1?

A: The VO617A-1 is physically and functionally compatible with the K817P1 in the same 4-DIP through-hole package. The higher isolation voltage (5300Vrms) and faster switching times provide enhanced performance margins. However, the current transfer ratio is specified at 5mA input instead of 10mA, requiring verification that input drive levels are compatible with the application circuit.

Q: What is the difference between the VO617A-1 and TCET1201 substitutes?

A: The TCET1201 provides identical electrical specifications to the K817P1, including isolation voltage, current transfer ratio measurement point, and switching characteristics. The VO617A-1 offers higher isolation voltage and faster switching performance but with different current transfer ratio measurement conditions. Selection depends on whether the application requires exact parameter matching (TCET1201) or can benefit from enhanced specifications (VO617A-1).

Q: Are all three parts pin-compatible?

A: Yes. The K817P1, VO617A-1, and TCET1201 all use the 4-DIP (0.300", 7.62mm) package with identical through-hole mounting, ensuring direct PCB compatibility without layout modifications.

Q: What compliance certifications apply to these substitute parts?

A: All three parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification. The VO617A-1 and TCET1201 also carry REACH Unaffected status. All parts are classified under ECCN EAR99 and HTSUS 8541.49.8000.

Q: Why is the K817P1 listed as obsolete?

A: The K817P1 is no longer in active production. The TCET1201 and VO617A-1 are active products from the same manufacturer, providing equivalent or enhanced functionality for ongoing applications and new designs.