5KP90-B Equivalent & Substitute Parts

Part Overview

The 5KP90-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 90V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The 5KP90-B is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

5KP90-B

Littelfuse Inc.In Stock: 10345KP90-B Datasheet

Current PartRFQ

5KP90A

Littelfuse Inc.In Stock: 44665KP90A Datasheet

DirectRFQ

5KP90A-B

Littelfuse Inc.In Stock: 9295KP90A-B Datasheet

DirectRFQ

15KP90A-TP

Micro Commercial CoIn Stock: 127815KP90A-TP Datasheet

MFR RecommendedRFQ

30KP90A-TP

Micro Commercial CoIn Stock: 99730KP90A-TP Datasheet

MFR RecommendedRFQ

5KP90E3/TR13

Microchip TechnologyIn Stock: 11255KP90E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 5KP90-B is determined by the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 90V and breakdown voltage minimum of 94.95V
• Power Handling: Peak pulse power of 5000W (5kW) or greater
• Package Compatibility: Through-hole axial configuration (P600 or R-6 packages acceptable)
• Electrical Characteristics: Unidirectional zener diode topology with clamping voltage performance suitable for transient suppression
• Compliance: ROHS3 compliance and operating temperature range of -55°C to 175°C

Substitute parts are grouped into two categories based on power rating and package type:

Category 1 - Direct Littelfuse Substitutes (5kW Power Rating, P600 Package)

• 5KP90A-B (Bulk packaging, Active status)
• 5KP90A (Cut Tape packaging, Active status)

Category 2 - Higher Power Alternatives (15kW-30kW Rating, R-6 Package)

• 15KP90A-TP (Micro Commercial Co, 15kW, Active status)
• 30KP90A-TP (Micro Commercial Co, 30kW, Active status)

Category 3 - Alternative Manufacturer (5kW Power Rating, P600 Package)

• 5KP90E3/TR13 (Microchip Technology, Active status)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Power Rating)

The 5KP90A-B and 5KP90A are the primary substitutes for the obsolete 5KP90-B. Both are manufactured by Littelfuse Inc. and maintain active product status. The 5KP90A-B is supplied in bulk packaging, while 5KP90A is supplied in cut tape. Both share identical electrical specifications with the main part except for clamping voltage (146V vs. 153.3V) and breakdown voltage (100V vs. 94.95V minimum). These parts are pin-compatible and package-compatible with the original 5KP90-B in P600 axial configuration.

For Higher Power Applications

The 15KP90A-TP and 30KP90A-TP from Micro Commercial Co provide increased power handling capability (15kW and 30kW respectively) while maintaining the 90V voltage rating. These parts use the R-6 axial package instead of P600, requiring board layout verification for mechanical fit. Both are active products with ROHS3 compliance.

For Alternative Manufacturer Selection

The 5KP90E3/TR13 from Microchip Technology offers an active-status alternative with identical 5kW power rating and P600 package compatibility. This part features a higher clamping voltage of 160V compared to the main part's 153.3V, suitable for applications requiring tighter voltage control.

All substitute options maintain ROHS3 compliance and the -55°C to 175°C operating temperature range of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use 5KP90A-B as a direct replacement for 5KP90-B?

A: Yes. The 5KP90A-B is electrically and mechanically compatible with the 5KP90-B. Both are unidirectional zener TVS diodes with 90V reverse standoff voltage, 5000W peak pulse power, and P600 axial through-hole packages. The primary difference is product status: 5KP90A-B is active while 5KP90-B is obsolete.

Q: What is the difference between the P600 and R-6 packages?

A: Both are through-hole axial packages for TVS diodes. P600 is the standard package used in the 5KP90-B, 5KP90A, and 5KP90E3/TR13. The R-6 package is used in the 15KP90A-TP and 30KP90A-TP. Physical dimensions differ, requiring board layout verification before substitution.

Q: Can I use a 15kW or 30kW rated part instead of the 5kW 5KP90-B?

A: Yes, higher power-rated parts (15KP90A-TP, 30KP90A-TP) can be used in applications where the 5KP90-B was specified, provided the package change from P600 to R-6 is accommodated in the circuit board design. Higher power ratings provide additional transient suppression margin.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts—5KP90A-B, 5KP90A, 15KP90A-TP, 30KP90A-TP, and 5KP90E3/TR13—are ROHS3 compliant and maintain the -55°C to 175°C operating temperature range.

Q: What is the significance of clamping voltage differences?

A: Clamping voltage determines the maximum voltage the TVS diode allows across its terminals during transient suppression. The 5KP90-B clamps at 153.3V maximum, while most substitutes clamp at 146V or 146.4V. Lower clamping voltages provide tighter protection; higher clamping voltages allow slightly higher transient peaks. Selection depends on the protected circuit's voltage tolerance.

Q: Which substitute should I choose for new designs?

A: For new designs requiring the same electrical and package specifications as the 5KP90-B, use 5KP90A or 5KP90A-B (Littelfuse Inc., active status, P600 package). For applications requiring higher transient energy absorption, consider 15KP90A-TP or 30KP90A-TP, accounting for R-6 package differences.