Equivalent & Substitute Parts for 3KP9.0C TVS Diode

Part Overview

The 3KP9.0C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 9V reverse standoff voltage, 16.17V maximum clamping voltage, and 3000W peak pulse power rating in a P600 axial through-hole package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs requiring similar protection characteristics.

Substiute Parts

3KP9.0C

LittelfuseIn Stock: 11673KP9.0C Datasheet

Current PartRFQ

5KP9.0CA

LittelfuseIn Stock: 43645KP9.0CA Datasheet

DirectRFQ

1.5KE10CA

Taiwan Semiconductor CorporationIn Stock: 10761.5KE10CA Datasheet

MFR RecommendedRFQ

P6KE10CA

Fairchild SemiconductorIn Stock: 9077P6KE10CA Datasheet

MFR RecommendedRFQ

1N6144

Microchip TechnologyIn Stock: 11501N6144 Datasheet

MFR RecommendedRFQ

P6KE10CA

Fairchild SemiconductorIn Stock: 9077P6KE10CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 3KP9.0C is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 9V nominal
• Voltage - Breakdown (Min): 9.5V minimum
• Bidirectional operation (1 channel)
• Through-hole axial mounting configuration
• General-purpose overvoltage protection application
• Operating temperature range: -55°C to 175°C

Substitute parts are grouped based on compatibility within these electrical and mechanical constraints. Parts with matching standoff voltage, breakdown voltage within acceptable tolerance, and compatible package types are considered direct substitutes. Power rating and peak pulse current may vary based on application requirements, but clamping voltage must remain within the specified range to ensure proper circuit protection.

Parameter Comparison

Engineering Selection Recommendations

5KP9.0CA (Littelfuse) is the primary direct substitute for the 3KP9.0C. Both components share identical reverse standoff voltage (9V), compatible clamping voltage (15.4V vs 16.17V), matching P600 axial package, and identical operating temperature range. The 5KP9.0CA is currently in active production status with higher peak pulse power (5000W vs 3000W) and greater peak pulse current (331.2A vs 194.8A), providing enhanced protection capability. ROHS3 compliance is maintained.

1.5KE10CA (Taiwan Semiconductor Corporation) and P6KE10CA (Fairchild Semiconductor) are alternative substitutes with different package configurations (DO-201 and DO-15 respectively). These parts maintain compatible voltage characteristics within acceptable tolerance but feature reduced power ratings (1500W and 600W respectively) and lower peak pulse currents. Selection of these alternatives requires verification that reduced power handling capacity is acceptable for the application.

1N6144 (Microchip Technology) is a substitute option with compatible clamping voltage (16.9V) and operating temperature range. However, this part carries RoHS non-compliance status, which may restrict use in applications requiring regulatory compliance. The higher breakdown voltage minimum (11.4V) represents a deviation from the original specification.

For applications requiring strict compliance with the original 3KP9.0C specifications and regulatory requirements, the 5KP9.0CA is the recommended selection due to active product status, ROHS3 compliance, and superior electrical performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 5KP9.0CA directly replace the 3KP9.0C in existing designs?

A: Yes. Both components share the same 9V reverse standoff voltage, compatible clamping voltage range, identical P600 axial package, and matching operating temperature specifications. The 5KP9.0CA is pin-compatible and electrically compatible for direct substitution.

Q: What is the primary difference between the 5KP9.0CA and the 3KP9.0C?

A: The 5KP9.0CA features higher peak pulse power (5000W vs 3000W) and greater peak pulse current (331.2A vs 194.8A), providing enhanced transient protection capability. The 5KP9.0CA is currently in active production, whereas the 3KP9.0C is obsolete.

Q: Can I use the 1.5KE10CA or P6KE10CA as substitutes?

A: These parts are electrical substitutes with compatible voltage characteristics but feature different package types (DO-201 and DO-15 respectively) and reduced power ratings. Use is limited to applications where the lower power handling capacity (1500W and 600W) is acceptable and where package size differences do not create mechanical constraints.

Q: Why is the 1N6144 not recommended as a primary substitute?

A: The 1N6144 carries RoHS non-compliance status, which restricts use in applications requiring regulatory compliance. Additionally, the higher breakdown voltage minimum (11.4V) represents a deviation from the original 9.5V specification.

Q: Are all substitute parts through-hole components?

A: Yes. All substitute parts listed maintain through-hole axial mounting configuration, ensuring compatibility with existing PCB designs and assembly processes.

Q: What compliance certifications should I verify for my application?

A: Verify ROHS3 compliance status for your specific regulatory requirements. The 5KP9.0CA maintains ROHS3 compliance matching the original 3KP9.0C. The 1N6144 is RoHS non-compliant and may not be suitable for applications requiring regulatory compliance.