TVS505 Equivalent & Substitute Parts Reference

Part Overview

The TVS505 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This axial-lead through-hole component operates with a 5V reverse standoff voltage and provides 53.7A peak pulse current capability at 8/20µs pulse duration. The part is currently in active production status with 1095 units available in inventory.

Equivalent and substitute parts are identified to address component availability, supply chain continuity, packaging preferences, or compliance requirements while maintaining functional compatibility within specified electrical parameters.

Substiute Parts

TVS505

Microchip TechnologyIn Stock: 1107TVS505 Datasheet

Current PartRFQ

BZW04-5V8

Diotec SemiconductorIn Stock: 45123BZW04-5V8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TVS505 are identified based on the following critical electrical and mechanical parameters:

Voltage Compatibility: Reverse standoff voltage and breakdown voltage must fall within acceptable ranges for the protected circuit. The TVS505 operates at 5V standoff with 6V minimum breakdown. Substitute parts must maintain similar voltage thresholds to ensure equivalent protection characteristics.

Current Handling Capacity: Peak pulse current rating determines the maximum transient energy the device can suppress. The TVS505 handles 53.7A at 8/20µs pulse duration. Substitute parts must support comparable or superior current ratings to maintain protection effectiveness.

Power Dissipation: Peak pulse power rating of 500W establishes the thermal stress limit during transient events. Substitute parts must meet or exceed this specification.

Thermal Operating Range: The TVS505 operates from -65°C to 175°C. Substitute parts must support this temperature envelope or a compatible subset.

Mounting and Package Compatibility: Through-hole axial packages are mechanically interchangeable with equivalent lead spacing and form factor.

Compliance Status: RoHS and REACH certifications affect suitability for regulated applications.

The BZW04-5V8 is identified as a substitute based on comparable voltage ratings, through-hole mounting, and general-purpose TVS diode classification, despite differences in peak current and clamping voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

TVS505 Selection: Retain the TVS505 for applications requiring the full 53.7A peak pulse current capacity, extended low-temperature operation to -65°C, or where the lower clamping voltage of 9.3V is critical to circuit protection margins. The TVS505 is active in production with adequate inventory availability.

BZW04-5V8 Selection: The BZW04-5V8 is suitable for applications where peak transient currents do not exceed 38A and where the higher clamping voltage of 10.5V is acceptable. This substitute is appropriate for designs requiring RoHS3 compliance. The narrower operating temperature range (-50°C to 175°C) must be verified against application requirements. Higher inventory availability (45,100 units) may support supply chain continuity.

Compliance Consideration: The BZW04-5V8 is ROHS3 compliant, whereas the TVS505 is non-compliant. This distinction is material for regulated markets and end-use applications subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can the BZW04-5V8 directly replace the TVS505 in all applications?

A: No. The BZW04-5V8 has a lower peak pulse current rating (38A versus 53.7A) and higher clamping voltage (10.5V versus 9.3V). Substitution is valid only when circuit transient currents remain below 38A and the higher clamping voltage does not compromise circuit protection requirements.

Q: What is the significance of the different clamping voltages?

A: Clamping voltage determines the maximum voltage presented to the protected circuit during a transient event. The TVS505 clamps at 9.3V maximum, while the BZW04-5V8 clamps at 10.5V. Circuits with tighter voltage margins may require the TVS505.

Q: Are the axial packages mechanically identical?

A: Both parts use axial through-hole packages suitable for PCB mounting. However, the TVS505 uses package B while the BZW04-5V8 uses DO-15 (DO-204AC). Physical lead spacing and body dimensions may differ; verify mechanical compatibility with PCB footprint before substitution.

Q: Does the operating temperature range difference matter?

A: The BZW04-5V8 operates from -50°C minimum, whereas the TVS505 operates from -65°C. For applications requiring operation below -50°C, the TVS505 is required.

Q: What is the impact of RoHS compliance?

A: The BZW04-5V8 is ROHS3 compliant; the TVS505 is not. For products destined for markets with RoHS requirements, the BZW04-5V8 is the appropriate selection.

Q: How do the pulse duration specifications affect substitution?

A: The TVS505 is rated at 8/20µs pulse duration, while the BZW04-5V8 is rated at 10/1000µs. These represent different transient event profiles. Verify that the substitute's pulse duration specification aligns with the actual transient characteristics in the application.