5KP9.0-B Equivalent & Substitute Parts

Part Overview

The 5KP9.0-B is a unidirectional 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 classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

5KP9.0-B

Littelfuse Inc.In Stock: 8105KP9.0-B Datasheet

Current PartRFQ

5KP9.0A

LittelfuseIn Stock: 33145KP9.0A Datasheet

DirectRFQ

5KP9.0A-B

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

DirectRFQ

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

• Voltage - Reverse Standoff (Typ): 9V
• Voltage - Clamping (Max) @ Ipp: Maximum 16.17V
• Power - Peak Pulse: 5000W (5kW)
• Unidirectional Channels: 1
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Mounting Type: Through Hole
• RoHS Status: ROHS3 Compliant

Substitute parts must maintain identical reverse standoff voltage (9V), equivalent or lower clamping voltage, and matching or superior power dissipation capability. Package form factor and thermal operating range must be compatible with the original application requirements. All identified substitutes meet ROHS3 compliance and operate within the specified temperature range.

Parameter Comparison

Engineering Selection Recommendations

The 5KP9.0-B is obsolete and requires replacement with an active equivalent. Selection among available substitutes depends on package compatibility and application power requirements.

For applications requiring P600 package form factor with 5000W peak pulse power rating, 5KP9.0A and 5KP9.0A-B are direct electrical and mechanical equivalents. Both parts are manufactured by Littelfuse Inc., maintain identical reverse standoff voltage (9V), and provide superior clamping voltage performance (15.4V versus 16.17V). 5KP9.0A is supplied in cut tape packaging, while 5KP9.0A-B is available in bulk packaging. Both are ROHS3 compliant and active products.

5KP9.0A-TP, manufactured by Micro Commercial Co, provides equivalent electrical specifications with 5000W peak pulse power in an R-6 package. This option is suitable for applications where R-6 package compatibility exists.

SA9.0A, manufactured by Taiwan Semiconductor Corporation, is a manufacturer-recommended alternative with identical reverse standoff voltage and clamping voltage. However, this part features reduced peak pulse power (500W versus 5000W) and uses a DO-204AC (DO-15) package. SA9.0A is appropriate only for applications with lower power dissipation requirements and compatible package footprints.

Frequently Asked Questions (FAQ)

Q: Can 5KP9.0A directly replace 5KP9.0-B in existing designs?

A: Yes. 5KP9.0A maintains identical reverse standoff voltage (9V), equivalent clamping voltage (15.4V), matching peak pulse power (5000W), and identical P600 axial package form factor. The part is electrically and mechanically compatible for direct substitution.

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

A: Both parts are electrically identical with matching voltage and power specifications. The primary difference is packaging: 5KP9.0A is supplied in cut tape (CT) format, while 5KP9.0A-B is supplied in bulk. Selection depends on procurement and assembly requirements.

Q: Why is SA9.0A listed as a manufacturer-recommended alternative if it has lower power rating?

A: SA9.0A is recommended for applications where the 500W power rating is sufficient. The part maintains identical voltage specifications (9V reverse standoff, 15.4V clamping) but uses a different package (DO-204AC). This option is suitable only for lower-power protection circuits.

Q: Can 5KP9.0A-TP be used instead of 5KP9.0A?

A: 5KP9.0A-TP provides equivalent electrical specifications and 5000W peak pulse power but uses an R-6 package instead of P600. Substitution is possible only if the application circuit board and assembly process support R-6 package compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts (5KP9.0A, 5KP9.0A-B, SA9.0A, and 5KP9.0A-TP) are ROHS3 compliant and meet current environmental regulations.

Q: What is the impact of clamping voltage difference between 5KP9.0-B (16.17V) and substitute parts (15.4V)?

A: The substitute parts provide lower maximum clamping voltage, which represents improved protection performance. Lower clamping voltage reduces transient overvoltage stress on protected circuitry. This change is beneficial for component longevity and system reliability.