3KP13-B Transient Voltage Suppressor Diode - Equivalent & Substitute Parts

Part Overview

The 3KP13-B is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 13V reverse standoff voltage with a 22.58V maximum clamping voltage and 139.5A peak pulse current capability in a through-hole P600 axial package. The 3KP13-B is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for new designs and ongoing production requirements.

Substiute Parts

3KP13-B

Littelfuse Inc.In Stock: 7613KP13-B Datasheet

Current PartRFQ

5KP13A-B

Littelfuse Inc.In Stock: 9325KP13A-B Datasheet

DirectRFQ

3KP13A-TP

Micro Commercial CoIn Stock: 8303KP13A-TP Datasheet

MFR RecommendedRFQ

5KP13A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 84265KP13A-E3/54 Datasheet

MFR RecommendedRFQ

5KP13A-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 11015KP13A-E3/73 Datasheet

MFR RecommendedRFQ

5KP13AE3/TR13

Microchip TechnologyIn Stock: 10495KP13AE3/TR13 Datasheet

MFR RecommendedRFQ

5KP13AHE3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 8145KP13AHE3/54 Datasheet

MFR RecommendedRFQ

5KP13AHE3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 8115KP13AHE3/73 Datasheet

MFR RecommendedRFQ

5KP13E3/TR13

Microchip TechnologyIn Stock: 9625KP13E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP13-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must be 13V to maintain circuit protection threshold
• Voltage - Clamping (Max) @ Ipp: Must be within the range 21.5V to 23.8V to ensure adequate transient suppression
• Current - Peak Pulse (10/1000µs): Must be minimum 139.5A to handle specified surge conditions
• Power - Peak Pulse: Must be minimum 3000W for thermal performance
• Operating Temperature Range: Must support -55°C to 175°C (TJ)
• Mounting Type: Must be Through Hole
• Package / Case: Must be P600 or R-6 axial configuration
• Type: Must be Zener diode
• Unidirectional Channels: Must be 1 channel

Substitute parts are grouped into two categories: direct electrical equivalents with identical or superior electrical ratings, and active-status alternatives that meet all critical electrical and mechanical parameters while offering improved availability or enhanced specifications.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full ROHS3 compliance, addressing the obsolescence of the 3KP13-B. Selection among substitutes depends on application requirements and package constraints:

For direct P600 package replacement with enhanced specifications: 5KP13A-B, 5KP13A-E3/54, 5KP13A-E3/73, 5KP13AE3/TR13, 5KP13AHE3/54, and 5KP13AHE3/73 all provide superior peak pulse current (210A to 237.2A) and power dissipation (5000W) compared to the original 3KP13-B. These parts maintain the 13V reverse standoff voltage and clamping voltage within acceptable range (21.5V to 23.8V).

For automotive applications: 5KP13AHE3/54 and 5KP13AHE3/73 carry AEC-Q101 qualification and automotive-grade designation, suitable for automotive transient protection circuits.

For alternative package consideration: 3KP13A-TP from Micro Commercial Co provides identical electrical performance to the 3KP13-B (139.5A peak pulse current, 3000W power) but uses an R-6 axial package instead of P600. This option is suitable only if board layout accommodates R-6 package dimensions.

For standard industrial applications: 5KP13AE3/TR13 and 5KP13E3/TR13 from Microchip Technology offer tape and reel packaging for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 5KP series parts directly replace 3KP13-B in existing designs?

A: Yes, all 5KP13 variants listed meet or exceed the electrical specifications of the 3KP13-B. The 5KP series provides higher peak pulse current and power dissipation ratings, making them suitable drop-in replacements. Verify that board layout accommodates the P600 axial package dimensions.

Q: What is the difference between P600 and R-6 packages?

A: Both are through-hole axial packages for TVS diodes. P600 is the standard package used in the 3KP13-B. The R-6 package (used in 3KP13A-TP) has different physical dimensions. Use R-6 only if your PCB layout specifically accommodates this package footprint.

Q: Are automotive-qualified parts necessary for non-automotive applications?

A: No. The 5KP13AHE3/54 and 5KP13AHE3/73 carry AEC-Q101 qualification for automotive use. For general-purpose industrial applications, standard 5KP13 variants without automotive qualification are appropriate and typically offer better availability.

Q: How do clamping voltage differences affect circuit protection?

A: The 3KP13-B clamps at 22.58V maximum, while most 5KP substitutes clamp at 21.5V. Lower clamping voltage provides tighter transient suppression. The 5KP13E3/TR13 clamps at 23.8V, providing slightly looser suppression. Select based on your circuit's maximum allowable transient voltage specification.

Q: What packaging options are available for automated assembly?

A: 5KP13AE3/TR13 and 5KP13E3/TR13 are supplied in tape and reel (TR) format for automated pick-and-place assembly. Bulk packaging is available for 5KP13A-B. Verify packaging requirements with your assembly process.

Q: Are all substitutes RoHS3 compliant?

A: All listed active substitutes are ROHS3 compliant. The 3KP13-B original part is also ROHS3 compliant, ensuring environmental regulation consistency across design revisions.