K817P3 Optoisolator Transistor Output 5KV 4-DIP Equivalent & Substitute Parts

Part Overview

The K817P3 is a 5000Vrms optoisolator with transistor output in 4-DIP packaging, manufactured by Vishay Semiconductor Opto Division. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The K817P3 provides single-channel isolation with 50mA output current capability and is suitable for applications requiring high-voltage galvanic isolation with DC input control.

Substiute Parts

K817P3

Vishay Semiconductor Opto DivisionIn Stock: 12653K817P3 Datasheet

Current PartRFQ

VO617A-3

Vishay Semiconductor Opto DivisionIn Stock: 1495VO617A-3 Datasheet

MFR RecommendedRFQ

TCET1103

Vishay Semiconductor Opto DivisionIn Stock: 1583TCET1103 Datasheet

Parametric EquivalentRFQ

TCET1203

Vishay Semiconductor Opto DivisionIn Stock: 5727TCET1203 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the K817P3 are classified into two categories based on electrical parameter alignment:

MFR Recommended Substitute (VO617A-3): This part offers enhanced isolation voltage (5300Vrms vs. 5000Vrms) and improved switching performance with faster turn-on/turn-off times (3µs, 2.3µs vs. 6µs, 5µs). The VO617A-3 maintains identical output current capability (50mA), package form factor (4-DIP), and mounting type (Through Hole). Product status is Active, ensuring long-term availability.

Parametric Equivalents (TCET1103, TCET1203): These parts provide identical electrical specifications to the K817P3, including 5000Vrms isolation voltage, matching current transfer ratios (100%-200% @ 10mA), identical switching times (6µs, 5µs), and equivalent output voltage/current ratings. Both maintain the same 4-DIP package and Through Hole mounting. Both parts are Active status with confirmed inventory availability.

All substitute parts comply with ROHS3 and share the same package/case specification, enabling direct form-fit-function replacement in 4-DIP socket applications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents): TCET1103 and TCET1203 provide identical electrical and mechanical specifications to the K817P3. Both parts are Active status with established supply chains. Selection between TCET1103 and TCET1203 depends on inventory availability and procurement lead times. Both are ROHS3 compliant and carry REACH Unaffected status.

For Enhanced Performance: VO617A-3 is the manufacturer-recommended substitute, offering superior isolation voltage (5300Vrms), faster switching response (3µs, 2.3µs turn-on/turn-off), and extended operating temperature range (-55°C ~ 110°C). The VO617A-3 maintains identical output current and package specifications. This part is suitable for applications where improved isolation margin and faster response time provide system benefits. VO617A-3 is Active status with confirmed inventory.

All three substitute parts are through-hole mounted in 4-DIP packages, enabling direct socket compatibility with existing K817P3 designs without PCB modification.

Frequently Asked Questions (FAQ)

Q: Can TCET1103 and TCET1203 be used interchangeably with K817P3? A: Yes. Both parts provide identical electrical specifications including 5000Vrms isolation voltage, 100%-200% current transfer ratio at 10mA, 6µs/5µs turn-on/turn-off times, and 70V maximum output voltage. Package and mounting type are identical (4-DIP, Through Hole). Both are Active status with ROHS3 compliance.

Q: What is the advantage of VO617A-3 over the parametric equivalents? A: VO617A-3 offers 5300Vrms isolation (300V higher margin), faster switching times (3µs/2.3µs vs. 6µs/5µs), faster rise/fall times (2µs/2µs vs. 3µs/4.7µs), and extended operating temperature range (-55°C to 110°C vs. -40°C to 100°C). Maximum output voltage is also higher at 80V. These enhancements are beneficial for applications requiring improved noise immunity or extended thermal operation.

Q: Are all substitute parts ROHS3 compliant? A: Yes. K817P3, VO617A-3, TCET1103, and TCET1203 are all ROHS3 compliant. VO617A-3, TCET1103, and TCET1203 also carry REACH Unaffected status.

Q: What is the moisture sensitivity level for these parts? A: All parts, including K817P3 and all substitutes, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Can these parts be used in new designs? A: TCET1103, TCET1203, and VO617A-3 are all Active status parts suitable for new designs. K817P3 is Obsolete and should not be specified for new designs; use one of the Active alternatives instead.

Q: Are there any differences in forward voltage or saturation voltage? A: TCET1103 and TCET1203 match K817P3 exactly (Vf 1.25V, Vce Saturation 300mV). VO617A-3 has slightly higher Vf (1.35V) and Vce Saturation (400mV), which may require circuit verification in applications with tight voltage budgets.