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Equivalent & Substitute Parts for 3KP60 TVS Diode
Part Overview
The 3KP60 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 60V reverse standoff voltage rating with a 101.64V maximum clamping voltage and 31A peak pulse current capability in a through-hole P600 axial package.
The 3KP60 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure availability for new production runs, repairs, and system upgrades. Substitute components must maintain electrical compatibility within the specified parameter tolerances for this TVS diode category.
Substiute Parts
Key Parameters
| Parameter | 3KP60 Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 60 | V |
| Voltage - Breakdown (Min) | 63.18 | V |
| Voltage - Clamping (Max) @ Ipp | 101.64 | V |
| Current - Peak Pulse (10/1000µs) | 31 | A |
| Power - Peak Pulse | 3000 | W |
| Operating Temperature Range | -55 to 175 | °C |
| Package / Case | P600, Axial | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
Substitute Part Grouping Explanation
Substitution of the 3KP60 TVS diode is determined by the following critical electrical and mechanical parameters:
- Voltage Rating Compatibility: Reverse standoff voltage must be 60V (±tolerance as per manufacturer specifications)
- Package Compatibility: P600 axial through-hole package required for mechanical and thermal compatibility
- Unidirectional Configuration: Single-channel Zener-type TVS diode
- Electrical Performance: Peak pulse current capability and clamping voltage must support the application's transient suppression requirements
- Thermal Performance: Operating temperature range must encompass the application environment
- Compliance: RoHS3 compliance required for regulatory alignment
The substitute parts identified (5KP60A, 5KP60A-E3/54, and 5KP60A-E3/73) meet these criteria with enhanced electrical performance characteristics, particularly higher peak pulse power ratings (5000W vs. 3000W) and improved current handling capability.
Parameter Comparison
| Parameter | 3KP60 (Littelfuse) | 5KP60A (Diotec) | 5KP60A-E3/54 (Vishay) | 5KP60A-E3/73 (Vishay) | Unit |
|---|---|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 60 | 60 | 60 | 60 | V |
| Voltage - Breakdown (Min) | 63.18 | 66.7 | 66.7 | 66.7 | V |
| Voltage - Clamping (Max) @ Ipp | 101.64 | 96.8 | 97 | 97 | V |
| Current - Peak Pulse (10/1000µs) | 31 | 52 | 51.7 | 51.7 | A |
| Power - Peak Pulse | 3000 | 5000 | 5000 | 5000 | W |
| Operating Temperature Range | -55 to 175 | -50 to 175 | -55 to 175 | -55 to 175 | °C |
| Package / Case | P600, Axial | P600, Axial | P600, Axial | P600, Axial | — |
| Type | Zener | Zener | Zener | Zener | — |
| Unidirectional Channels | 1 | 1 | 1 | 1 | — |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | — |
| Product Status | Obsolete | Active | Active | Active | — |
Engineering Selection Recommendations
Primary Recommendation: 5KP60A-E3/54 (Vishay)
The 5KP60A-E3/54 is the manufacturer-recommended substitute for the 3KP60. This part maintains full electrical compatibility with identical reverse standoff voltage (60V) and package configuration (P600 axial). The component offers superior performance with 5000W peak pulse power rating versus the original 3000W, providing enhanced transient suppression capability. Operating temperature range (-55 to 175°C) matches the original specification. RoHS3 compliance and active product status ensure long-term availability and regulatory alignment. Cut tape packaging supports both prototype and production environments.
Secondary Recommendation: 5KP60A-E3/73 (Vishay)
The 5KP60A-E3/73 provides identical electrical and thermal performance to the 5KP60A-E3/54 with equivalent substitution suitability. This variant maintains all critical parameters and compliance certifications. Selection between the two Vishay variants depends on packaging and supply chain requirements.
Alternative Recommendation: 5KP60A (Diotec)
The 5KP60A from Diotec Semiconductor offers equivalent electrical performance with 5000W peak pulse power and 52A peak pulse current. This part maintains 60V reverse standoff voltage and P600 axial package compatibility. Operating temperature range extends to -50°C minimum (versus -55°C for original and Vishay alternatives). RoHS3 compliance is confirmed. Tape & Reel packaging is optimized for high-volume production environments.
All three substitute parts are active products with confirmed inventory availability and meet the electrical and mechanical requirements for direct substitution in applications originally designed for the 3KP60.
Frequently Asked Questions (FAQ)
Q: Can the 5KP60A series directly replace the 3KP60 in existing designs?
A: Yes. The 5KP60A series maintains identical reverse standoff voltage (60V), package configuration (P600 axial), and unidirectional Zener-type topology. All substitute parts are pin-compatible and functionally equivalent for general-purpose transient voltage suppression applications.
Q: What is the primary difference between the 3KP60 and 5KP60A substitutes?
A: The primary difference is peak pulse power rating. The 3KP60 is rated for 3000W peak pulse power, while the 5KP60A series is rated for 5000W. This represents an enhancement in transient suppression capability. The 5KP60A series also provides higher peak pulse current (51.7–52A versus 31A), resulting in lower clamping voltage under high-current transient events.
Q: Are there temperature range differences between substitute options?
A: The Diotec 5KP60A has a minimum operating temperature of -50°C, while the original 3KP60 and both Vishay variants (5KP60A-E3/54 and 5KP60A-E3/73) are rated to -55°C. For applications requiring operation below -50°C, the Vishay variants are recommended.
Q: Do all substitute parts meet RoHS3 compliance?
A: Yes. All three substitute parts (5KP60A from Diotec, 5KP60A-E3/54, and 5KP60A-E3/73 from Vishay) are RoHS3 compliant, matching the compliance status of the original 3KP60.
Q: What packaging options are available for the substitute parts?
A: The 5KP60A (Diotec) is supplied in Tape & Reel (TR) format for production environments. The 5KP60A-E3/54 (Vishay) is supplied in Cut Tape (CT) format. The 5KP60A-E3/73 (Vishay) packaging is not specified but maintains identical electrical specifications. Selection depends on procurement and assembly requirements.
Q: Why is the 3KP60 obsolete if substitutes are available?
A: The 3KP60 has been discontinued by Littelfuse Inc. The identified substitute parts from Diotec and Vishay offer equivalent or superior performance characteristics and are actively manufactured, ensuring continued availability for new designs and legacy system support.
Q: Can clamping voltage differences affect circuit performance?
A: The substitute parts exhibit lower maximum clamping voltage (96.8–97V) compared to the original 3KP60 (101.64V). This represents improved transient suppression performance, as lower clamping voltage provides better protection for downstream components. This difference is beneficial for most applications and does not constitute a compatibility issue.
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