5KP120 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP120 is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 120V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package.

The 5KP120 is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure continued availability for new production builds and field replacements.

Substiute Parts

5KP120

LittelfuseIn Stock: 9455KP120 Datasheet

Current PartRFQ

5KP120A

Littelfuse Inc.In Stock: 43305KP120A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP120 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must be 120V to maintain circuit protection thresholds
• Unidirectional Channels: Must be 1 (single channel configuration)
• Power - Peak Pulse: Must be 5000W (5kW) to handle transient energy
• Package / Case: Must be P600, Axial for mechanical and electrical compatibility
• Mounting Type: Must be Through Hole for PCB integration compatibility
• Operating Temperature Range: Must support -55°C ~ 175°C (TJ)

The 5KP120A qualifies as a direct substitute based on these parameters. Both components share identical standoff voltage, power rating, package type, and thermal operating range. The 5KP120A is currently in active production status, making it the recommended replacement for the obsolete 5KP120.

Parameter Comparison

Engineering Selection Recommendations

The 5KP120A is the appropriate substitute for the obsolete 5KP120. Both components maintain identical electrical specifications for reverse standoff voltage (120V), peak pulse power (5000W), and thermal operating range (-55°C ~ 175°C). The 5KP120A is currently in active production status, ensuring long-term availability and supply chain continuity.

Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, meeting equivalent environmental and regulatory requirements. The 5KP120A's lower clamping voltage (193V versus 202.65V) and specified peak pulse current (26.4A) represent improved performance characteristics within the same power class.

Frequently Asked Questions (FAQ)

Q: Can the 5KP120A be used as a direct replacement for the 5KP120?

A: Yes. The 5KP120A is a direct substitute. Both components share the same reverse standoff voltage (120V), peak pulse power rating (5000W), package type (P600 Axial), and operating temperature range (-55°C ~ 175°C). The 5KP120A is currently in active production, whereas the 5KP120 is obsolete.

Q: What are the key differences between the 5KP120 and 5KP120A?

A: The primary differences are product status and specified electrical parameters. The 5KP120A provides a lower maximum clamping voltage (193V versus 202.65V) and includes a specified peak pulse current rating (26.4A). Both maintain the same 120V standoff voltage and 5000W power rating.

Q: Are there any package or mounting differences?

A: No. Both the 5KP120 and 5KP120A use the P600 axial through-hole package, ensuring identical PCB footprint and mounting compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 5KP120 and 5KP120A are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What is the availability status of these parts?

A: The 5KP120 is obsolete. The 5KP120A is in active production status with current inventory availability.