BZX84J-C24,115 Equivalent & Substitute Parts

Part Overview

The BZX84J-C24,115 is a 24 V Zener diode rated at 550 mW in a surface mount SOD-323F package, manufactured by Nexperia USA Inc. This component is classified as an automotive-grade device with AEC-Q101 qualification and is currently in active production status. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications across automotive and industrial electronics. Alternative parts may be required due to inventory constraints, lead time considerations, or specific tolerance and performance requirements for particular circuit designs.

Substiute Parts

BZX84J-C24,115

Nexperia USA Inc.In Stock: 1528BZX84J-C24,115 Datasheet

Current PartRFQ

BZX84J-B24,115

Nexperia USA Inc.In Stock: 263947BZX84J-B24,115 Datasheet

Parametric EquivalentRFQ

MM5Z24VT1G

onsemiIn Stock: 125327MM5Z24VT1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of Zener diodes is determined by equivalence in the following critical parameters: nominal Zener voltage, maximum power dissipation rating, package type, and operating temperature range. The BZX84J-C24,115 establishes a baseline specification of 24 V nominal voltage, 550 mW power rating, and SOD-323F packaging.

Substitute parts are grouped into two categories:

Parametric Equivalent: Parts that maintain identical or superior electrical performance within the same package footprint, allowing direct replacement without circuit modification.

Similar Specification: Parts that meet the core voltage and temperature requirements but may differ in power rating, package dimensions, or impedance characteristics, requiring circuit-level evaluation.

The following parameters are critical for substitution assessment:

• Nominal Zener voltage (24 V)
• Maximum power dissipation (550 mW or higher)
• Package compatibility (SOD-323F or equivalent footprint)
• Operating temperature range (-65°C to 150°C minimum)
• Reverse leakage current specification
• Impedance characteristics

Parameter Comparison

Engineering Selection Recommendations

BZX84J-B24,115 (Nexperia USA Inc.): This part is a parametric equivalent suitable for direct replacement in the same PCB footprint. It maintains identical power rating (550 mW), impedance (30 Ohms), and package (SOD-323F). The tighter tolerance specification (±2% versus ±5%) provides improved voltage accuracy. Both parts carry automotive-grade classification with AEC-Q101 qualification, ensuring compliance with automotive reliability standards. This substitute is recommended for applications requiring enhanced voltage regulation precision.

MM5Z24VT1G (onsemi): This part meets the core voltage specification (24 V) and operating temperature range (-65°C to 150°C) but differs in several critical parameters. The power rating is reduced to 500 mW, impedance is increased to 70 Ohms, and the package is SOD-523 rather than SOD-323F. The forward voltage characteristic differs at a lower test current (900 mV @ 10 mA). This part does not carry automotive-grade or AEC-Q101 qualification. Selection of this substitute requires circuit-level analysis to confirm compatibility with power dissipation requirements and impedance tolerance. PCB layout modification is necessary due to package footprint differences.

Frequently Asked Questions (FAQ)

Q: Can BZX84J-B24,115 be used as a direct replacement for BZX84J-C24,115?

A: Yes. Both parts share identical nominal voltage (24 V), power rating (550 mW), impedance (30 Ohms), and SOD-323F package. The BZX84J-B24,115 features tighter tolerance (±2% versus ±5%), making it suitable for direct PCB substitution without layout changes.

Q: What are the key differences between BZX84J-C24,115 and MM5Z24VT1G?

A: The primary differences are package type (SOD-323F versus SOD-523), power rating (550 mW versus 500 mW), impedance (30 Ohms versus 70 Ohms), and automotive qualification status. The MM5Z24VT1G lacks AEC-Q101 certification. These differences require circuit evaluation and PCB redesign for footprint compatibility.

Q: Is the MM5Z24VT1G suitable for automotive applications?

A: The MM5Z24VT1G is not classified as automotive-grade and does not carry AEC-Q101 qualification. Applications requiring automotive-grade components should use BZX84J-C24,115 or BZX84J-B24,115.

Q: What does the ±5% tolerance specification mean for the BZX84J-C24,115?

A: The ±5% tolerance indicates that the actual Zener voltage will fall within the range of 22.8 V to 25.2 V at the specified test conditions. The BZX84J-B24,115 substitute provides tighter tolerance at ±2%, resulting in a voltage range of 23.52 V to 24.48 V.

Q: Can I use MM5Z24VT1G in a high-power dissipation circuit designed for 550 mW?

A: No. The MM5Z24VT1G is rated for 500 mW maximum power dissipation, which is 50 mW lower than the BZX84J-C24,115. Circuits designed for 550 mW operation may exceed the thermal limits of this substitute.

Q: Are all three parts RoHS compliant?

A: Yes. BZX84J-C24,115, BZX84J-B24,115, and MM5Z24VT1G are all ROHS3 compliant with moisture sensitivity level 1 (unlimited).

Q: What is the significance of the 30 Ohms impedance specification?

A: Impedance (Zzt) affects the dynamic response of the Zener diode under transient conditions. The lower impedance (30 Ohms) of the Nexperia parts provides better voltage regulation stability compared to the MM5Z24VT1G (70 Ohms). Higher impedance may result in greater voltage ripple in regulation applications.