Equivalent & Substitute Parts for 5KP9.0A-B

Part Overview

The 5KP9.0A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This through-hole component operates across a temperature range of -55°C to 175°C and maintains ROHS3 compliance with unlimited moisture sensitivity rating. The part is currently in active production status with 1121 units available in bulk packaging.

Equivalent and substitute parts are identified when they maintain identical electrical performance characteristics—specifically reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse power rating—while potentially differing in packaging format, manufacturer, or peak pulse current specifications where not critical to the application.

Substiute Parts

5KP9.0A-B

Littelfuse Inc.In Stock: 12025KP9.0A-B Datasheet

Current PartRFQ

5KP9.0A

LittelfuseIn Stock: 33145KP9.0A Datasheet

MFR RecommendedRFQ

SA9.0A

Taiwan Semiconductor CorporationIn Stock: 300450SA9.0A Datasheet

MFR RecommendedRFQ

5KP9.0A-TP

Micro Commercial CoIn Stock: 63685KP9.0A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution validity for the 5KP9.0A-B is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 9V (exact match required)
• Voltage - Breakdown: 10V minimum (exact match required)
• Voltage - Clamping: 15.4V maximum at Ipp (exact match required)
• Power - Peak Pulse: 5000W (exact match required)
• Operating Temperature Range: -55°C to 175°C (exact match required)
• Unidirectional Channels: 1 (exact match required)
• Type: Zener (exact match required)

Substitute parts may differ in the following non-critical parameters:

• Packaging format (Bulk, Cut Tape)
• Package/Case designation (P600, DO-204AC, R-6)
• Manufacturer identity
• Peak Pulse Current rating (when power rating is maintained)
• Inventory availability

Three substitute parts meet these criteria: 5KP9.0A (Littelfuse, Cut Tape packaging), SA9.0A (Taiwan Semiconductor Corporation, DO-204AC package), and 5KP9.0A-TP (Micro Commercial Co, R-6 package).

Parameter Comparison

Engineering Selection Recommendations

All four parts—5KP9.0A-B, 5KP9.0A, 5KP9.0A-TP, and SA9.0A—maintain active production status and ROHS3 compliance, qualifying them for equivalent use in applications requiring 9V unidirectional TVS protection with 5000W peak pulse power handling.

The 5KP9.0A and 5KP9.0A-TP are direct electrical equivalents to the 5KP9.0A-B, differing only in packaging format and case designation. Selection between these three depends on procurement requirements and PCB assembly specifications for P600 or R-6 axial packages.

The SA9.0A, manufactured by Taiwan Semiconductor Corporation in DO-204AC (DO-15) package, maintains identical voltage specifications and operating temperature range but delivers 500W peak pulse power instead of 5000W. This part is suitable only for applications where peak pulse power requirements do not exceed 500W. The DO-204AC package provides a different form factor requiring mechanical compatibility verification.

Frequently Asked Questions (FAQ)

Q: Can SA9.0A replace 5KP9.0A-B in all applications?

A: No. While SA9.0A matches all voltage parameters (9V standoff, 10V breakdown, 15.4V clamping), it is rated for 500W peak pulse power versus 5000W for the 5KP9.0A-B. Use SA9.0A only in applications where peak pulse power does not exceed 500W.

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

A: Both parts are manufactured by Littelfuse with identical electrical specifications. The primary difference is packaging: 5KP9.0A-B is supplied in Bulk format, while 5KP9.0A is supplied in Cut Tape (CT) format. Electrical performance is equivalent.

Q: Are package differences between P600, DO-204AC, and R-6 significant for substitution?

A: Yes. These represent different physical form factors for through-hole axial components. PCB footprint, lead spacing, and assembly equipment compatibility must be verified before substitution. Mechanical compatibility with the target application is required.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All four parts are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1) and maintain REACH unaffected status. Compliance certifications are equivalent across all options.

Q: Which substitute offers the best inventory availability?

A: SA9.0A has the highest inventory level at 300,400 units. However, inventory selection should be secondary to electrical and mechanical compatibility requirements for the specific application.