5KP8.0C-B Equivalent & Substitute Parts

Part Overview

The 5KP8.0C-B is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features an 8V reverse standoff voltage, 14.28V maximum clamping voltage, and 5000W peak pulse power rating in a P600 axial through-hole package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

5KP8.0C-B

Littelfuse Inc.In Stock: 9755KP8.0C-B Datasheet

Current PartRFQ

5KP8.0CA

Littelfuse Inc.In Stock: 41205KP8.0CA Datasheet

DirectRFQ

5KP8.0CA-B

LittelfuseIn Stock: 11725KP8.0CA-B Datasheet

DirectRFQ

SA8.0CA

Taiwan Semiconductor CorporationIn Stock: 13804SA8.0CA Datasheet

MFR RecommendedRFQ

5KP8.0CE3/TR13

Microchip TechnologyIn Stock: 9055KP8.0CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP8.0C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must be 8V to maintain circuit protection threshold
• Bidirectional Channels: Must be 1 (single channel)
• Mounting Type: Must be Through Hole for PCB compatibility
• Package / Case: P600 axial or equivalent mechanical form factor
• Power - Peak Pulse: Must be 5000W (5kW) or greater to handle transient energy
• Operating Temperature Range: Must support -55°C ~ 175°C (TJ)
• Type: Zener diode technology
• RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories based on package compatibility:

Category 1 - P600 Package (Direct Mechanical Substitutes): 5KP8.0CA, 5KP8.0CA-B, and 5KP8.0CE3/TR13 maintain identical P600 axial through-hole packaging.

Category 2 - Alternative Package (Functional Equivalent): SA8.0CA uses DO-204AC (DO-15) package, requiring mechanical redesign but offering functional equivalence with reduced power rating.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (P600 Package - Direct Replacement)

The 5KP8.0CA and 5KP8.0CA-B are the preferred substitutes for the obsolete 5KP8.0C-B. Both maintain identical P600 axial through-hole packaging, enabling direct PCB footprint compatibility without layout modifications. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating. The 5KP8.0CA is available in Tape & Reel packaging (4100 pcs in stock), while the 5KP8.0CA-B is available in Bulk packaging (1135 pcs in stock). Both deliver 5000W peak pulse power and support the full -55°C to 175°C operating temperature range. The clamping voltage of 13.6V is lower than the original 14.28V, providing enhanced protection margin.

Secondary Substitute (P600 Package - Microchip Source)

The 5KP8.0CE3/TR13 manufactured by Microchip Technology offers P600 package compatibility with active product status and ROHS3 compliance. This part provides 15V maximum clamping voltage and 5000W peak pulse power. It is available in Tape & Reel packaging (883 pcs in stock). The higher clamping voltage may be suitable for applications requiring less aggressive voltage suppression.

Alternative Substitute (DO-204AC Package - Functional Equivalent)

The SA8.0CA manufactured by Taiwan Semiconductor Corporation provides functional equivalence with 8V reverse standoff voltage, 13.6V clamping voltage, and ROHS3 compliance. However, this part uses DO-204AC (DO-15) package instead of P600, requiring mechanical redesign and PCB layout modification. The peak pulse power is reduced to 500W, limiting applicability to lower-energy transient environments. This substitute is suitable only when package redesign is feasible and power requirements do not exceed 500W. Inventory availability is highest at 13790 pcs in stock.

Frequently Asked Questions (FAQ)

Q: Can the 5KP8.0CA directly replace the 5KP8.0C-B without PCB modification?

A: Yes. The 5KP8.0CA maintains identical P600 axial through-hole packaging and electrical specifications (8V reverse standoff, 5000W peak pulse power, -55°C to 175°C operating range). No PCB layout changes are required for direct substitution.

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

A: Both parts are electrically identical with matching specifications. The primary difference is packaging format: 5KP8.0CA is supplied in Tape & Reel (TR), while 5KP8.0CA-B is supplied in Bulk. Selection depends on procurement and assembly requirements.

Q: Why is the clamping voltage lower in substitute parts compared to the original 5KP8.0C-B?

A: The 5KP8.0CA and 5KP8.0CA-B specify 13.6V maximum clamping voltage versus 14.28V for the original part. This represents tighter voltage suppression and provides enhanced protection margin for sensitive circuits. Both values remain within acceptable transient suppression performance for 8V standoff applications.

Q: Can the SA8.0CA be used as a direct replacement?

A: The SA8.0CA is a functional equivalent but not a direct replacement. It uses DO-204AC (DO-15) package instead of P600, requiring PCB redesign. Additionally, the 500W peak pulse power rating is one-tenth that of the original part, limiting use to low-energy transient environments. Mechanical and thermal design review is necessary before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (5KP8.0CA, 5KP8.0CA-B, 5KP8.0CE3/TR13, and SA8.0CA) are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original 5KP8.0C-B specifications.

Q: What is the impact of using 5KP8.0CE3/TR13 with 15V clamping voltage?

A: The 5KP8.0CE3/TR13 provides higher clamping voltage (15V versus 13.6V in other substitutes), resulting in less aggressive voltage suppression. This may be acceptable for applications with higher transient voltage tolerance. The part maintains P600 package compatibility and 5000W peak pulse power rating.

Q: Which substitute offers the best inventory availability?

A: The SA8.0CA offers the highest inventory at 13790 pcs in stock. However, if P600 package compatibility is required, the 5KP8.0CA (4100 pcs) provides the best availability among direct mechanical substitutes.