MR2520L Equivalent & Substitute Parts

Part Overview

The MR2520L is a Transient Voltage Suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection applications. This component features a 23V reverse standoff voltage rating and 2500W peak pulse power handling capability in a through-hole Microde Button package. The MR2520L is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

MR2520L

onsemiIn Stock: 1175MR2520L Datasheet

Current PartRFQ

BZW50-27

STMicroelectronicsIn Stock: 1064BZW50-27 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MR2520L is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Unidirectional Zener TVS diode topology (single channel)
• Reverse standoff voltage range: 23V nominal operation
• Breakdown voltage minimum: 24V or higher
• Peak pulse power rating: minimum 2500W capability
• General-purpose overvoltage protection application class

Mechanical Compatibility Criteria:

• Through-hole axial mounting configuration
• Button or R-6 package styles (compatible footprints for axial leads)
• Operating temperature range: -65°C to 175°C or equivalent

The BZW50-27 substitute meets these criteria with a 27V reverse standoff voltage, 30V minimum breakdown voltage, and 5000W peak pulse power rating in an R-6 through-hole axial package, providing enhanced performance margins while maintaining functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

The BZW50-27 is the identified substitute for the obsolete MR2520L based on electrical and mechanical compatibility within the TVS diode category.

Product Status Consideration: The MR2520L is obsolete, while the BZW50-27 is active and in production. This ensures long-term availability and supply chain continuity for new designs or ongoing production requirements.

Compliance Status: The BZW50-27 is ROHS3 compliant, whereas the MR2520L is RoHS non-compliant. Both components are REACH unaffected and classified under ECCN EAR99 and HTSUS 8541.10.0080.

Performance Margin: The BZW50-27 provides enhanced electrical performance with a higher peak pulse power rating (5000W versus 2500W) and specified clamping voltage and peak pulse current characteristics, offering improved protection margins in overvoltage suppression applications.

Package Compatibility: Both components utilize through-hole axial mounting. The MR2520L uses a Microde Button package, while the BZW50-27 uses an R-6 package. Both are compatible with standard through-hole PCB layouts for axial components.

Frequently Asked Questions (FAQ)

Q: Can the BZW50-27 directly replace the MR2520L in existing designs?

A: Yes, the BZW50-27 is electrically and mechanically compatible as a substitute. Both are unidirectional Zener TVS diodes with through-hole axial mounting. The higher voltage ratings (27V standoff, 30V breakdown) and increased power rating (5000W) of the BZW50-27 provide enhanced protection margins. PCB footprint compatibility should be verified, as the Microde Button and R-6 packages have different physical dimensions despite both being axial through-hole styles.

Q: What are the key electrical differences between these parts?

A: The primary electrical differences are the reverse standoff voltage (23V for MR2520L versus 27V for BZW50-27), breakdown voltage (24V minimum versus 30V minimum), and peak pulse power rating (2500W versus 5000W). The BZW50-27 also provides specified clamping voltage (62V) and peak pulse current (968A at 8/20µs), which are not specified for the MR2520L.

Q: Are there any compliance or regulatory differences?

A: Yes. The BZW50-27 is ROHS3 compliant, while the MR2520L is RoHS non-compliant. Both are REACH unaffected. For applications requiring RoHS compliance, the BZW50-27 is the appropriate choice.

Q: How do the package styles affect PCB design?

A: Both components are through-hole axial packages suitable for standard PCB layouts. However, the Microde Button (MR2520L) and R-6 (BZW50-27) packages have different physical dimensions and lead spacing. PCB footprint verification is necessary before substitution to ensure mechanical fit and proper board assembly.

Q: Why is the MR2520L obsolete?

A: The MR2520L is classified as obsolete by onsemi, indicating it is no longer in active production. The BZW50-27 from STMicroelectronics serves as the active substitute, ensuring continued availability and support for TVS diode applications in this voltage and power class.