BZX84J-B68,115 Equivalent & Substitute Parts

Part Overview

The BZX84J-B68,115 is an automotive-grade Zener diode manufactured by Nexperia USA Inc., rated for 68 V nominal Zener voltage with 550 mW maximum power dissipation. The device is packaged in SOD-323F surface mount configuration and complies with AEC-Q101 automotive qualification standards. This part is currently in active production status with 4016 units in stock.

Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements where alternative electrical or mechanical characteristics are acceptable within system design parameters.

Substiute Parts

BZX84J-B68,115

Nexperia USA Inc.In Stock: 4097BZX84J-B68,115 Datasheet

Current PartRFQ

MM3Z68VB

onsemiIn Stock: 5333MM3Z68VB Datasheet

SimilarRFQ

MM3Z68VC

Fairchild SemiconductorIn Stock: 32796MM3Z68VC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BZX84J-B68,115 are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Zener voltage: 68 V nominal
• Package type: SOD-323F surface mount
• Operating temperature range: -65°C to 150°C
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Secondary Consideration:

• Power dissipation rating: Substitute parts rated at 200 mW represent a reduced power capability compared to the 550 mW main part. This substitution is valid only in applications where the circuit design does not require the full 550 mW power handling capacity.

Tolerance Variation:

• The main part specifies ±2% tolerance. Substitute MM3Z68VC offers ±5% tolerance, which represents a wider acceptable voltage range and may not be suitable for precision voltage regulation applications requiring tighter tolerance control.

Parameter Comparison

Engineering Selection Recommendations

MM3Z68VB (onsemi) - Primary Substitute:

The MM3Z68VB is suitable as a substitute where power dissipation requirements do not exceed 200 mW. This part maintains ±2% tolerance matching the main part specification, identical operating temperature range, and equivalent reverse leakage characteristics. Both parts carry ROHS3 compliance and MSL 1 rating. The higher impedance (226 Ohms vs. 160 Ohms) must be evaluated within the specific circuit application to confirm acceptable voltage regulation performance.

MM3Z68VC (Fairchild Semiconductor) - Limited Substitution:

The MM3Z68VC shares the same 68 V nominal voltage and SOD-323F package with identical operating temperature range and reverse leakage specifications. However, this part carries ±5% tolerance, which represents a wider acceptable voltage band compared to the ±2% specification of the main part. This tolerance variance may introduce unacceptable voltage regulation error in precision applications. Additionally, RoHS and MSL compliance status are not specified for this part. The MM3Z68VC is suitable only in applications where the ±5% tolerance is acceptable and where compliance documentation requirements are not critical.

All substitute parts are in active production status with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can MM3Z68VB be used as a direct replacement for BZX84J-B68,115 in all applications?

A: The MM3Z68VB is functionally equivalent for applications where the circuit design does not require power dissipation exceeding 200 mW. The reduced power rating is the primary limiting factor. If the application requires the full 550 mW capability, the MM3Z68VB is not suitable. Both parts share identical Zener voltage, tolerance, and temperature range specifications.

Q: What is the significance of the impedance difference between the main part (160 Ohms) and the substitute parts (226 Ohms)?

A: Impedance affects the dynamic voltage regulation characteristics of the Zener diode. The higher impedance of the substitute parts results in greater voltage variation across the diode as load current changes. Circuit designs must be evaluated to confirm that the higher impedance does not cause unacceptable voltage regulation performance or stability issues.

Q: Why does MM3Z68VC have a ±5% tolerance instead of ±2%?

A: Tolerance specifications are determined by the manufacturer's production process and quality control standards. The ±5% tolerance on MM3Z68VC represents a wider acceptable voltage range (64.6 V to 71.4 V) compared to the ±2% range of the main part (66.64 V to 69.36 V). Applications requiring precise voltage regulation within a narrow band should not use the MM3Z68VC.

Q: Are all substitute parts available in the same packaging format?

A: The MM3Z68VB is supplied in Tape & Reel (TR) packaging, matching the main part. The MM3Z68VC is supplied in Bulk packaging, which may require different handling, storage, and assembly procedures. Verify that bulk packaging is compatible with your manufacturing process before selection.

Q: What compliance certifications should I verify before selecting a substitute part?

A: Confirm that the selected substitute part meets your application's compliance requirements. The BZX84J-B68,115 carries AEC-Q101 automotive qualification, ROHS3 compliance, and MSL 1 rating. The MM3Z68VB matches these specifications. The MM3Z68VC does not specify RoHS or MSL compliance status and should be verified with the supplier before use in regulated applications.

Q: Can the substitute parts handle the same reverse voltage as the main part?

A: All parts are rated for the same 68 V Zener voltage and share identical reverse leakage specifications (45-50 nA @ 47.6 V). The reverse voltage handling capability is equivalent across all three parts.