15KP75 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 15KP75 is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This through-hole axial component operates across a temperature range of -55°C to 175°C and features a 75V reverse standoff voltage with 128.1V maximum clamping voltage at peak pulse current.

The 15KP75 is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for systems utilizing this TVS diode.

Substiute Parts

15KP75

LittelfuseIn Stock: 113315KP75 Datasheet

Current PartRFQ

5KP75A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 39885KP75A-E3/54 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 15KP75 is determined by the following critical electrical and mechanical parameters:

• Voltage Class: Reverse standoff voltage of 75V and breakdown voltage minimum of 78.72V establish the voltage protection tier
• Package Type: P600 axial through-hole package ensures mechanical and thermal compatibility
• Unidirectional Configuration: Single-channel Zener-type topology for single-polarity transient suppression
• Operating Temperature Range: -55°C to 175°C junction temperature capability
• Compliance: ROHS3 compliance and moisture sensitivity level (MSL) 1 rating

The 5KP75A-E3/54 from Vishay General Semiconductor - Diodes Division qualifies as a manufacturer-recommended substitute. This part maintains identical voltage class (75V standoff), identical package configuration (P600 axial), matching unidirectional Zener topology, and equivalent temperature operating range. Both components are ROHS3 compliant with MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

The 5KP75A-E3/54 is the manufacturer-recommended substitute for the obsolete 15KP75. Both components share identical voltage class specifications (75V standoff), matching package geometry (P600 axial through-hole), and equivalent operating temperature ranges (-55°C to 175°C).

The 5KP75A-E3/54 maintains active product status with full manufacturer support and supply chain availability. Both parts are ROHS3 compliant and carry MSL 1 (unlimited moisture sensitivity) ratings, ensuring equivalent environmental and regulatory compliance.

The substitute part exhibits lower peak pulse power rating (5kW versus 15kW) and lower maximum clamping voltage (121V versus 128.1V). These differences require evaluation against specific circuit protection requirements. Applications requiring the full 15kW pulse power capability of the original 15KP75 may necessitate alternative component selection or circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the 5KP75A-E3/54 be used as a direct replacement for the 15KP75 in all applications?

A: The 5KP75A-E3/54 qualifies as a substitute based on matching voltage class, package type, and operating temperature range. However, the lower peak pulse power rating (5kW versus 15kW) and lower clamping voltage (121V versus 128.1V) require verification against circuit protection specifications. Applications with high-energy transient requirements may not be suitable for this substitute.

Q: Are there any package compatibility concerns when substituting the 5KP75A-E3/54 for the 15KP75?

A: Both components use identical P600 axial through-hole packaging. Physical dimensions, lead spacing, and mounting characteristics are compatible. No PCB layout modifications are required for package substitution.

Q: What is the significance of the different peak pulse power ratings between these parts?

A: The 15KP75 is rated for 15kW peak pulse power, while the 5KP75A-E3/54 is rated for 5kW. This difference reflects the energy-handling capability during transient suppression events. Circuit designs relying on the higher power dissipation capability must confirm that the substitute part meets thermal and energy requirements.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the 15KP75 and 5KP75A-E3/54 are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity ratings. Both carry EAR99 export classification and identical HTSUS commodity codes (8541.10.0080).

Q: Why is the 15KP75 classified as obsolete?

A: The 15KP75 is no longer in active production. The 5KP75A-E3/54 from Vishay represents the active equivalent in the 75V TVS diode category, ensuring continued availability and manufacturer support for new designs and ongoing production requirements.