5KP9.0C-B Equivalent & Substitute Parts

Part Overview

The 5KP9.0C-B is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 9V reverse standoff voltage, 16.17V maximum clamping voltage, and 5000W peak pulse power rating in a through-hole P600 axial package. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

5KP9.0C-B

Littelfuse Inc.In Stock: 6955KP9.0C-B Datasheet

Current PartRFQ

5KP9.0CA

LittelfuseIn Stock: 43645KP9.0CA Datasheet

DirectRFQ

5KP9.0CA-B

Littelfuse Inc.In Stock: 8585KP9.0CA-B Datasheet

DirectRFQ

SA9.0CA

Taiwan Semiconductor CorporationIn Stock: 8331SA9.0CA Datasheet

MFR RecommendedRFQ

5KP9.0CE3/TR13

Microchip TechnologyIn Stock: 9355KP9.0CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP9.0C-B is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage - Reverse Standoff: 9V (exact match required)
• Voltage - Breakdown (Min): 9.5V or higher
• Voltage - Clamping (Max) @ Ipp: 16.17V or lower (to ensure protection threshold compatibility)
• Power - Peak Pulse: 5000W minimum (equal or greater)
• Bidirectional Channels: 1 (single channel)
• Type: Zener

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole
• Package / Case: P600 or equivalent axial package
• Operating Temperature Range: -55°C ~ 175°C or wider

Compliance Requirements:

• RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories based on package configuration: P600 axial package (direct mechanical substitutes) and DO-204AC axial package (alternative axial configuration).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (P600 Package - Direct Mechanical Replacement):

The 5KP9.0CA and 5KP9.0CA-B are active Littelfuse products with identical electrical specifications to the obsolete 5KP9.0C-B, differing only in packaging format (Tape & Reel versus Bulk). Both maintain the 9V reverse standoff voltage, 5000W peak pulse power rating, and P600 axial package configuration. These parts are recommended for direct substitution in existing designs without PCB layout modifications. The 5KP9.0CA-B is available in bulk packaging, while the 5KP9.0CA is supplied in tape and reel format for automated assembly.

The 5KP9.0CE3/TR13 (Microchip Technology) is an active alternative with identical P600 package and 5000W power rating. This part exhibits a slightly higher clamping voltage (16.9V versus 16.17V) and lower peak pulse current (296A versus 331.2A for Littelfuse variants), remaining within acceptable substitution parameters for general-purpose overvoltage protection applications.

Secondary Substitute (DO-204AC Package - Alternative Axial Configuration):

The SA9.0CA (Taiwan Semiconductor Corporation) is an active alternative with matching 9V reverse standoff voltage and operating temperature range. This part uses a DO-204AC (DO-15) axial package instead of P600, requiring PCB layout verification for lead spacing compatibility. The SA9.0CA operates at 500W peak pulse power, which is one-tenth the power rating of the main part. This substitute is suitable only for applications where peak pulse power requirements do not exceed 500W.

All substitute parts maintain ROHS3 compliance and identical operating temperature specifications (-55°C to 175°C).

Frequently Asked Questions (FAQ)

Q: Can the 5KP9.0CA directly replace the obsolete 5KP9.0C-B without design changes?

A: Yes. The 5KP9.0CA is electrically and mechanically identical to the 5KP9.0C-B, with the same 9V reverse standoff voltage, 5000W peak pulse power rating, and P600 axial package. No PCB modifications are required. The only difference is packaging format (Tape & Reel versus the original format).

Q: What is the difference between 5KP9.0CA and 5KP9.0CA-B?

A: Both parts are electrically identical with matching electrical specifications. The difference is packaging: 5KP9.0CA is supplied in Tape & Reel format for automated assembly, while 5KP9.0CA-B is supplied in Bulk format. Select based on your assembly process requirements.

Q: Can the SA9.0CA replace the 5KP9.0C-B in all applications?

A: The SA9.0CA is electrically compatible with matching 9V reverse standoff voltage and clamping characteristics. However, it operates at 500W peak pulse power compared to the 5000W rating of the 5KP9.0C-B. Substitution is valid only for applications where peak pulse power does not exceed 500W. Additionally, the SA9.0CA uses a DO-204AC package instead of P600, requiring verification of lead spacing compatibility with your PCB layout.

Q: Why does the 5KP9.0CE3/TR13 have a higher clamping voltage (16.9V) than the original part (16.17V)?

A: The 5KP9.0CE3/TR13 is manufactured by Microchip Technology and exhibits slightly different clamping characteristics within the acceptable range for 9V TVS diodes. The 16.9V clamping voltage remains within acceptable limits for general-purpose overvoltage protection and does not compromise circuit protection. This part maintains the same 5000W power rating and P600 package configuration.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (5KP9.0CA, 5KP9.0CA-B, 5KP9.0CE3/TR13, and SA9.0CA) are ROHS3 compliant, matching the compliance status of the original 5KP9.0C-B.

Q: What is the operating temperature range for these TVS diodes?

A: All parts, including the original 5KP9.0C-B and all substitutes, operate across the temperature range of -55°C to 175°C (junction temperature). This specification is consistent across all listed alternatives.