15KP120A Equivalent & Substitute Parts

Part Overview

The 15KP120A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. It features a 120V reverse standoff voltage with a 193V maximum clamping voltage and 78A peak pulse current capability in a through-hole P600 axial package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

15KP120A

Littelfuse Inc.In Stock: 314315KP120A Datasheet

Current PartRFQ

15KPA120A

MDE Semiconductor IncIn Stock: 220315KPA120A Datasheet

DirectRFQ

5KP120AE3/TR13

Microchip TechnologyIn Stock: 7835KP120AE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 15KP120A is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff: 120V (nominal)
• Voltage - Clamping (Max) @ Ipp: 193V (maximum allowable)
• Current - Peak Pulse (10/1000µs): minimum 78A required for equivalent protection capability
• Power - Peak Pulse: minimum 15000W (15kW) required
• Operating Temperature Range: -55°C ~ 175°C (TJ)

Mechanical Compatibility Criteria:

• Package / Case: P600, Axial (through-hole mounting)
• Unidirectional Channels: 1
• Type: Zener

The identified substitute parts maintain these core parameters within the specified tolerances, ensuring functional equivalence in overvoltage protection applications.

Parameter Comparison

Engineering Selection Recommendations

15KPA120A (MDE Semiconductor Inc): This part maintains full electrical and mechanical equivalence to the 15KP120A. It is currently in active production status with ROHS3 compliance and identical power dissipation capability (15kW). This substitute is suitable for direct replacement in applications requiring the full 78A+ peak pulse current specification.

5KP120AE3/TR13 (Microchip Technology): This part shares the same voltage specifications and package form factor as the 15KP120A but operates at reduced peak pulse current (26.4A) and power dissipation (5kW). This substitute is applicable only in applications where peak pulse current requirements do not exceed 26.4A. The part is currently in active production status with ROHS3 compliance and REACH Unaffected designation.

Frequently Asked Questions (FAQ)

Q: Can the 5KP120AE3/TR13 be used as a direct replacement for the 15KP120A?

A: The 5KP120AE3/TR13 is not a direct replacement. While it maintains identical voltage specifications (120V reverse standoff, 193V clamping) and package form factor (P600 axial), it is rated for only 26.4A peak pulse current versus the 15KP120A's 78A specification. Use this substitute only if your application's peak pulse current requirement does not exceed 26.4A.

Q: What is the primary difference between the 15KPA120A and 15KP120A?

A: The 15KPA120A is the active production equivalent of the obsolete 15KP120A. Both parts maintain identical electrical specifications: 120V reverse standoff voltage, 193V clamping voltage, 78A peak pulse current, and 15kW power dissipation. The 15KPA120A is manufactured by MDE Semiconductor Inc and is currently in active production status.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All identified substitutes utilize the P600 axial through-hole package, ensuring mechanical compatibility with existing PCB designs and assembly processes.

Q: Do the substitute parts meet the same compliance standards as the 15KP120A?

A: All identified substitutes are ROHS3 compliant, matching the compliance status of the 15KP120A. The 5KP120AE3/TR13 carries additional REACH Unaffected designation.

Q: What is the operating temperature range for the substitute parts?

A: All substitute parts operate across the same temperature range as the 15KP120A: -55°C to 175°C junction temperature (TJ).