5KP8.5A-E3/73 Equivalent & Substitute Parts

Part Overview

The 5KP8.5A-E3/73 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for general-purpose transient voltage protection applications, featuring an 8.5V reverse standoff voltage and 14.4V maximum clamping voltage. The part is currently in active production status with 678 pieces available in new original inventory. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility is required while maintaining electrical and mechanical compatibility.

Substiute Parts

5KP8.5A-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 7415KP8.5A-E3/73 Datasheet

Current PartRFQ

5KP8.5A

LittelfuseIn Stock: 3001105KP8.5A Datasheet

DirectRFQ

SA8.5A

Taiwan Semiconductor CorporationIn Stock: 8461SA8.5A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5KP8.5A-E3/73 are qualified based on the following critical parameters that must remain constant:

• Voltage - Reverse Standoff (Typ): 8.5V
• Voltage - Clamping (Max) @ Ipp: 14.4V
• Voltage - Breakdown (Min): 9.44V
• Type: Zener, Unidirectional
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Mounting Type: Through Hole
• Applications: General Purpose

Substitutes are grouped into two categories based on package compatibility and current handling capacity:

Category 1 - Full Electrical & Package Equivalence (5KP8.5A): Direct substitute with identical P600 package, matching peak pulse current specifications, and equivalent 5000W power rating.

Category 2 - Voltage & Temperature Equivalence with Package Variation (SA8.5A): Substitute with matching voltage parameters and operating temperature range but different package type (DO-204AC/DO-15) and reduced peak pulse current (36A vs. 347A).

Parameter Comparison

Engineering Selection Recommendations

5KP8.5A (Littelfuse): This substitute is recommended as the primary equivalent for the 5KP8.5A-E3/73. It maintains identical electrical specifications, package type (P600), and power rating (5000W). Both components are ROHS3 compliant, REACH unaffected, and carry MSL 1 rating. The peak pulse current of 354.2A exceeds the original specification of 347A, providing equivalent or superior performance. This part is suitable for direct board-level replacement without design modification.

SA8.5A (Taiwan Semiconductor Corporation): This substitute maintains voltage equivalence (8.5V standoff, 14.4V clamping) and identical operating temperature range (-55°C ~ 175°C). However, the package differs (DO-204AC/DO-15 vs. P600) and peak pulse current is significantly reduced (36A vs. 347A) with corresponding power rating reduction (500W vs. 5000W). This part is ROHS3 compliant and REACH unaffected. Selection of this substitute requires verification that application requirements do not exceed 36A peak pulse current and 500W peak power dissipation. Board layout modification may be necessary due to package differences.

Frequently Asked Questions (FAQ)

Q: Can the 5KP8.5A from Littelfuse be used as a direct replacement for the 5KP8.5A-E3/73?

A: Yes. The 5KP8.5A maintains identical voltage specifications (8.5V standoff, 14.4V clamping), package type (P600 axial), and power rating (5000W). Peak pulse current is 354.2A compared to 347A in the original part. Both components are ROHS3 compliant and REACH unaffected. No design modification is required.

Q: What are the limitations of using the SA8.5A as a substitute?

A: The SA8.5A differs in two critical aspects: package type (DO-204AC/DO-15 instead of P600) and current handling capacity (36A peak pulse vs. 347A). The power rating is reduced to 500W. This substitute is suitable only for applications where peak pulse current does not exceed 36A and peak power dissipation does not exceed 500W. Board layout modification is necessary due to package differences.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All parts listed—5KP8.5A-E3/73, 5KP8.5A, and SA8.5A—are ROHS3 compliant and REACH unaffected. All carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the key parameter that determines substitutability?

A: The primary substitution criterion is voltage equivalence: Reverse Standoff Voltage of 8.5V and Clamping Voltage of 14.4V. Secondary criteria include operating temperature range (-55°C ~ 175°C), unidirectional zener type, and through-hole mounting. Current and power ratings must be verified against application requirements.

Q: Can the SA8.5A be used in high-current transient protection applications?

A: No. The SA8.5A is rated for 36A peak pulse current and 500W peak power, which is significantly lower than the 5KP8.5A-E3/73 (347A, 5000W). Use of the SA8.5A in applications requiring higher current handling will result in component failure or inadequate protection.