Littelfuse 5KP8.0-B Transient Voltage Suppressor (TVS) Equivalent & Substitute Parts

Part Overview

The Littelfuse 5KP8.0-B is a unidirectional Zener-type transient voltage suppressor diode designed for general-purpose overvoltage protection applications. This component features an 8V reverse standoff voltage with a 14.28V maximum clamping voltage and 5000W peak pulse power rating in a P600 axial through-hole package.

The 5KP8.0-B is classified as obsolete. Equivalent and substitute parts are available from Littelfuse and Taiwan Semiconductor Corporation with active product status, offering improved availability while maintaining core electrical and mechanical compatibility for circuit protection applications.

Substiute Parts

5KP8.0-B

LittelfuseIn Stock: 7795KP8.0-B Datasheet

Current PartRFQ

5KP8.0A

Littelfuse Inc.In Stock: 33865KP8.0A Datasheet

DirectRFQ

5KP8.0A-B

Littelfuse Inc.In Stock: 10545KP8.0A-B Datasheet

DirectRFQ

SA8.0A

Taiwan Semiconductor CorporationIn Stock: 300339SA8.0A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP8.0-B is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 8V
• Unidirectional Channels: 1
• Type: Zener
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS Status: ROHS3 Compliant

Package Compatibility Considerations:

• P600 axial package (Littelfuse 5KP8.0-B and 5KP8.0A-B)
• DO-204AC (DO-15) axial package (Taiwan Semiconductor SA8.0A)

All substitute parts maintain the 8V reverse standoff voltage specification and unidirectional protection topology. Variations in clamping voltage and peak pulse current are documented in the parameter comparison table and reflect design differences between manufacturers while preserving the core 8V protection function.

Parameter Comparison

Engineering Selection Recommendations

Littelfuse 5KP8.0A-B (Primary Substitute): Active product status with identical P600 axial package footprint. Maintains 8V reverse standoff voltage and 5000W peak pulse power rating. ROHS3 compliant with REACH unaffected status. Recommended for direct replacement in existing P600 package designs.

Littelfuse 5KP8.0A (Alternative Substitute): Active product status with identical electrical specifications to 5KP8.0A-B. Supplied in Cut Tape packaging. Suitable for applications where packaging format does not restrict selection. ROHS3 compliant with REACH unaffected status.

Taiwan Semiconductor SA8.0A (Cross-Manufacturer Substitute): Active product status with 8V reverse standoff voltage and 13.6V clamping voltage matching Littelfuse active variants. Supplied in Tape & Reel packaging. Package format is DO-204AC (DO-15) axial, requiring PCB footprint verification for compatibility. Peak pulse power is 500W, significantly lower than the 5000W rating of Littelfuse variants. ROHS3 compliant with REACH unaffected status. Selection requires confirmation that 500W peak pulse power meets application requirements.

Frequently Asked Questions (FAQ)

Q: Can the 5KP8.0A-B directly replace the obsolete 5KP8.0-B?

A: Yes. Both components share identical reverse standoff voltage (8V), peak pulse power (5000W), operating temperature range (-55°C to 175°C), and P600 axial through-hole package. The 5KP8.0A-B is the direct active equivalent with no design changes required.

Q: What is the difference between 5KP8.0A-B and 5KP8.0A?

A: Both parts are electrically identical with 8V reverse standoff voltage and 5000W peak pulse power. The primary difference is packaging format: 5KP8.0A-B is supplied in Bulk packaging, while 5KP8.0A is supplied in Cut Tape. Selection depends on procurement and assembly requirements.

Q: Can SA8.0A be used as a substitute for 5KP8.0-B?

A: SA8.0A maintains the 8V reverse standoff voltage and 13.6V clamping voltage required for 8V protection circuits. However, two factors require evaluation: (1) Package format is DO-204AC (DO-15) axial, which differs from the P600 package; PCB footprint compatibility must be verified. (2) Peak pulse power is 500W, compared to 5000W for Littelfuse variants; applications requiring higher transient energy dissipation may exceed SA8.0A capability.

Q: What determines whether a part can substitute for the 5KP8.0-B?

A: Substitution requires matching the 8V reverse standoff voltage, unidirectional Zener topology, through-hole mounting type, and -55°C to 175°C operating temperature range. Package compatibility (P600 or equivalent axial format) and peak pulse power rating must be verified for the specific application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The 5KP8.0-B, 5KP8.0A-B, 5KP8.0A, and SA8.0A are all ROHS3 compliant. The Littelfuse variants also carry REACH unaffected status.

Q: What is the inventory status of these parts?

A: 5KP8.0-B (obsolete) has 737 pcs in stock. 5KP8.0A-B (active) has 1017 pcs in stock. 5KP8.0A (active) has 3300 pcs in stock. SA8.0A (active) has 300,300 pcs in stock.