5KP26A Equivalent & Substitute Parts

Part Overview

The 5KP26A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole axial 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 4605 units available in inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and design optimization where electrical and mechanical parameters align within acceptable tolerances.

Substiute Parts

5KP26A

Littelfuse Inc.In Stock: 46525KP26A Datasheet

Current PartRFQ

BZW50-27

STMicroelectronicsIn Stock: 1064BZW50-27 Datasheet

DirectRFQ

5KP26A-TP

Micro Commercial CoIn Stock: 12345KP26A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP26A is determined by alignment across the following critical parameters: reverse standoff voltage (26V nominal), breakdown voltage minimum (28.9V), clamping voltage maximum (42.1V), peak pulse power rating (5000W), through-hole mounting configuration, and axial package geometry. Substitute parts must maintain these electrical specifications within the defined ranges to ensure functional equivalence in circuit protection applications.

Two substitute parts meet these criteria:

5KP26A-TP (Micro Commercial Co): Manufacturer-recommended equivalent with identical reverse standoff voltage (26V), breakdown voltage (28.9V), and clamping voltage (42.1V). Package configuration transitions from P600 to R-6 axial, both suitable for through-hole mounting. Operating temperature range matches the original specification (-55°C to 175°C). This part represents a direct functional equivalent with package variation.

BZW50-27 (STMicroelectronics): Direct substitute with comparable reverse standoff voltage (27V, +1V variance), breakdown voltage (30V, +1.1V variance), and identical peak pulse power rating (5000W). Clamping voltage specification (62V) exceeds the original by 19.9V, representing a higher protection threshold. Package configuration is R-6 axial through-hole. This part functions as a substitute where slightly elevated clamping voltage is acceptable within circuit design margins.

Parameter Comparison

Engineering Selection Recommendations

5KP26A-TP is the primary substitute option. This part is manufacturer-recommended, maintains identical electrical specifications across all critical parameters, and preserves the full operating temperature range (-55°C to 175°C). The transition from P600 to R-6 axial package represents a standard industry variation for through-hole TVS diodes. Both packages are mechanically compatible with standard PCB footprints designed for axial components. ROHS3 compliance and unlimited moisture sensitivity rating align with the original specification.

BZW50-27 functions as a secondary substitute where circuit design permits elevated clamping voltage. The 27V reverse standoff voltage and 30V breakdown voltage represent minor deviations (+1V and +1.1V respectively) within typical design tolerances for general-purpose protection applications. The 62V clamping voltage provides enhanced transient suppression but requires verification that downstream components tolerate this higher protection threshold. ROHS3 compliance is maintained. Peak pulse current specification (968A at 8/20µs) differs from the original measurement standard (121.1A at 10/1000µs), reflecting different test pulse waveforms between manufacturers.

Selection between these substitutes depends on circuit-specific requirements: use 5KP26A-TP for direct functional replacement; use BZW50-27 where higher clamping voltage provides design margin or where supply constraints necessitate alternative sourcing.

Frequently Asked Questions (FAQ)

Q: Can 5KP26A-TP be used as a direct replacement for 5KP26A?

A: Yes. The 5KP26A-TP maintains identical reverse standoff voltage (26V), breakdown voltage (28.9V), and clamping voltage (42.1V). Operating temperature range is preserved (-55°C to 175°C). The package transitions from P600 to R-6 axial configuration; both are standard through-hole axial packages compatible with equivalent PCB footprints.

Q: What is the significance of the clamping voltage difference between 5KP26A and BZW50-27?

A: The 5KP26A clamps at 42.1V maximum, while BZW50-27 clamps at 62V maximum. This 19.9V difference means BZW50-27 permits higher transient voltage before suppression. Circuit design must confirm that connected components tolerate this elevated protection threshold. For applications requiring strict voltage clamping at 42.1V, 5KP26A-TP is the appropriate choice.

Q: Are the peak pulse current specifications comparable between 5KP26A and BZW50-27?

A: No direct comparison is valid. The 5KP26A specifies 121.1A at 10/1000µs pulse waveform, while BZW50-27 specifies 968A at 8/20µs pulse waveform. These represent different industry test standards. Both parts share identical 5000W peak pulse power rating, which is the primary design parameter for power dissipation capacity.

Q: Do all three parts meet RoHS and REACH compliance requirements?

A: Yes. All three parts—5KP26A, 5KP26A-TP, and BZW50-27—are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (unlimited) for all parts.

Q: What package considerations apply when substituting between P600 and R-6 axial configurations?

A: Both P600 and R-6 are standard through-hole axial packages for TVS diodes. PCB footprints designed for axial components accommodate both package types. Lead spacing and hole diameter specifications must be verified against PCB design files to ensure mechanical compatibility. No functional difference exists between packages for electrical performance.