P4KE550A-E3/73 Equivalent & Substitute Parts

Part Overview

The P4KE550A-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 and operates as a Zener-type TVS diode in a through-hole DO-204AL (DO-41) axial package. The part is currently in active production status with 900 pieces available in new original inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter ranges.

Substiute Parts

P4KE550A-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 962P4KE550A-E3/73 Datasheet

Current PartRFQ

P4KE550A

SMC Diode SolutionsIn Stock: 31767P4KE550A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS diodes is determined by matching the following critical parameters:

• Voltage Rating Class: Reverse standoff voltage, breakdown voltage minimum, and clamping voltage maximum must fall within acceptable tolerance ranges for the application circuit
• Current Handling: Peak pulse current rating must meet or exceed the transient current requirements
• Power Dissipation: Peak pulse power rating must support the energy absorption demands
• Package Compatibility: Physical form factor and mounting type must be identical to ensure mechanical fit and thermal performance
• Temperature Operating Range: Must encompass the application's thermal environment
• Regulatory Compliance: RoHS and REACH status must satisfy end-product requirements

The P4KE550A manufactured by SMC Diode Solutions shares the same base product number (P4KE550), package type (DO-204AL/DO-41 axial through-hole), mounting configuration, and general-purpose application classification as the primary part. Both components are RoHS3 compliant and rated for identical package classifications.

Parameter Comparison

Engineering Selection Recommendations

Both the Vishay P4KE550A-E3/73 and the SMC Diode Solutions P4KE550A are active production components with ROHS3 compliance. The SMC variant demonstrates a higher peak pulse power rating (400W versus 300W) and an extended operating temperature range (-65°C to 175°C versus -55°C to 150°C), providing additional thermal margin in demanding environments. Selection between these parts should be based on application-specific thermal and power requirements, supply chain availability, and regulatory compliance documentation requirements. The SMC part carries REACH Affected status, whereas the Vishay part is REACH Unaffected; this distinction may influence material declaration requirements in regulated supply chains.

Frequently Asked Questions (FAQ)

Q: Can the SMC Diode Solutions P4KE550A directly replace the Vishay P4KE550A-E3/73?

A: Both parts share identical package geometry (DO-204AL/DO-41 axial through-hole), mounting type, and base product classification. The SMC variant offers equal or superior electrical performance in power dissipation and temperature range. Direct mechanical and electrical substitution is supported by the provided parameter data.

Q: What is the significance of the different peak pulse power ratings (300W vs. 400W)?

A: The power rating indicates the maximum transient energy the diode can safely dissipate during a 10/1000µs pulse event. The SMC part's higher 400W rating provides additional design margin for applications with higher energy transients. If your circuit requires exactly 300W dissipation, both parts are suitable; if transient energy approaches or exceeds 300W, the SMC part offers additional safety margin.

Q: Does the extended temperature range of the SMC part affect circuit performance?

A: The SMC part operates from -65°C to 175°C versus the Vishay part's -55°C to 150°C range. This extended range does not degrade performance within the Vishay temperature window; it simply provides operational capability at more extreme temperatures. For applications operating within -55°C to 150°C, both parts perform identically.

Q: What is the difference between REACH Affected and REACH Unaffected status?

A: REACH Affected indicates the component may contain substances of concern requiring material declaration documentation. REACH Unaffected indicates no such substances are present. If your supply chain requires REACH Unaffected certification, the Vishay part is the appropriate selection. If REACH documentation is acceptable, both parts are viable.

Q: Are there packaging differences between these parts?

A: The Vishay part is supplied in standard packaging, while the SMC part is supplied in Tape & Reel (TR) format. Both use identical DO-204AL/DO-41 axial through-hole package geometry. Tape & Reel packaging is standard for automated assembly processes; standard packaging is typical for manual or mixed-volume assembly. Select based on your assembly method and volume requirements.