Littelfuse 3KP13 Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The Littelfuse 3KP13 is a unidirectional Zener transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. It features a 13V reverse standoff voltage with a maximum clamping voltage of 22.58V at peak pulse current and delivers 3000W peak pulse power dissipation in a through-hole P600 axial package.

The 3KP13 is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for systems utilizing this device.

Substiute Parts

3KP13

Littelfuse Inc.In Stock: 7683KP13 Datasheet

Current PartRFQ

5KP13A

Littelfuse Inc.In Stock: 42605KP13A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP13 is determined by the following critical electrical and mechanical parameters:

• Voltage Class: Reverse standoff voltage of 13V (nominal)
• Package Compatibility: P600 axial through-hole form factor
• Zener Type: Unidirectional configuration
• Temperature Range: Operating range of -55°C to 175°C (TJ)
• Regulatory Compliance: ROHS3 compliance requirement

The 5KP13A qualifies as a direct substitute based on matching voltage class, package type, unidirectional configuration, temperature range, and regulatory compliance. The primary distinction is enhanced power dissipation capability (5000W vs. 3000W), which provides superior transient protection margin without compromising compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 5KP13A is the qualified substitute for the obsolete 3KP13. Both components are manufactured by Littelfuse Inc. and maintain ROHS3 compliance, ensuring regulatory alignment for new designs and legacy system support.

The 5KP13A is currently in active production status with substantial inventory availability (4202 pcs), whereas the 3KP13 is obsolete with limited remaining stock (751 pcs). The 5KP13A provides enhanced peak pulse current handling (237.2A vs. 139.5A) and increased power dissipation (5000W vs. 3000W) while maintaining the same reverse standoff voltage, breakdown voltage range, and thermal operating envelope. The clamping voltage of the 5KP13A (21.5V) is marginally lower than the 3KP13 (22.58V), representing improved transient suppression performance.

Both devices are identical in package form factor (P600 axial through-hole) and mounting methodology, enabling direct mechanical and electrical substitution without circuit board redesign.

Frequently Asked Questions (FAQ)

Q: Can the 5KP13A be used as a direct replacement for the 3KP13 in existing designs?

A: Yes. The 5KP13A is electrically and mechanically compatible with the 3KP13. Both devices share the same 13V reverse standoff voltage, P600 axial through-hole package, unidirectional Zener configuration, and -55°C to 175°C operating temperature range. No circuit modifications are required.

Q: What is the primary difference between the 3KP13 and 5KP13A?

A: The 5KP13A provides higher peak pulse current capacity (237.2A vs. 139.5A) and greater power dissipation (5000W vs. 3000W). The 5KP13A also features a slightly lower clamping voltage (21.5V vs. 22.58V), resulting in improved transient protection. The 3KP13 is obsolete; the 5KP13A is in active production.

Q: Are there any compliance or certification differences?

A: Both the 3KP13 and 5KP13A are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. No compliance barriers exist for substitution.

Q: Does the package form factor remain identical?

A: Yes. Both devices use the P600 axial through-hole package. No PCB layout modifications or mechanical changes are necessary for substitution.

Q: What is the inventory status of each part?

A: The 3KP13 is obsolete with 751 pcs remaining in stock. The 5KP13A is in active production with 4202 pcs available, ensuring long-term supply chain continuity.