BZX84J-B56,115 Equivalent & Substitute Parts

Part Overview

The BZX84J-B56,115 is an active Zener diode manufactured by Nexperia USA Inc., designed for voltage regulation and protection applications. This surface mount component operates at a nominal Zener voltage of 56 V with ±2% tolerance and dissipates up to 550 mW. The device is packaged in SOD-323F and qualifies under AEC-Q101 automotive standards. Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining package compatibility and compliance requirements.

Substiute Parts

BZX84J-B56,115

Nexperia USA Inc.In Stock: 3743BZX84J-B56,115 Datasheet

Current PartRFQ

MM3Z56VB

onsemiIn Stock: 62251MM3Z56VB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZX84J-B56,115 is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Nominal Zener voltage must equal 56 V
• Voltage tolerance must be ±2% or tighter
• Operating temperature range must encompass -65°C to 150°C
• Package and case designation must be SOD-323F
• Mounting type must be Surface Mount

Compliance & Regulatory Criteria:

• RoHS3 compliance required
• MSL rating of 1 (Unlimited) required
• REACH Unaffected status required

The MM3Z56VB from onsemi qualifies as a substitute based on matching nominal Zener voltage (56 V), tolerance (±2%), operating temperature range (-65°C to 150°C), package type (SOD-323F), mounting configuration (Surface Mount), and regulatory compliance (ROHS3, MSL 1, REACH Unaffected). Power dissipation differences do not preclude substitution when application requirements permit lower maximum power ratings.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: BZX84J-B56,115

The BZX84J-B56,115 is the preferred selection when maximum power dissipation of 550 mW is required. This part carries active product status, AEC-Q101 automotive qualification, and ROHS3 compliance. The lower impedance specification (120 Ohms maximum) provides superior voltage regulation characteristics in applications demanding tighter dynamic response.

Substitute Part: MM3Z56VB

The MM3Z56VB is a qualified substitute when application power requirements do not exceed 200 mW. This part maintains active product status and full regulatory compliance (ROHS3, REACH Unaffected, MSL 1). The identical nominal Zener voltage (56 V) and tolerance (±2%) ensure voltage regulation performance equivalence. The higher impedance (188 Ohms maximum) is acceptable in applications where dynamic impedance specifications are not critical. Selection of this substitute is appropriate for cost optimization or supply chain continuity when power dissipation margins permit.

Both parts are suitable for automotive-grade applications and share identical package geometry (SOD-323F) and thermal operating range (-65°C to 150°C).

Frequently Asked Questions (FAQ)

Q: Can MM3Z56VB replace BZX84J-B56,115 in all applications?

A: The MM3Z56VB is a functional substitute when the application power dissipation requirement does not exceed 200 mW. Both parts deliver identical nominal Zener voltage (56 V) and tolerance (±2%). Applications requiring sustained power dissipation above 200 mW must retain the BZX84J-B56,115.

Q: Are the package dimensions identical between these parts?

A: Both parts use the SOD-323F package designation. Package geometry and land pattern compatibility are equivalent for surface mount assembly.

Q: What is the significance of the impedance difference between these parts?

A: The BZX84J-B56,115 specifies 120 Ohms maximum impedance, while the MM3Z56VB specifies 188 Ohms maximum impedance. Lower impedance provides superior voltage regulation under transient load conditions. Applications with stringent dynamic impedance requirements should retain the BZX84J-B56,115.

Q: Do both parts meet automotive qualification standards?

A: The BZX84J-B56,115 carries explicit AEC-Q101 automotive qualification. The MM3Z56VB does not list AEC-Q101 qualification in the provided specifications. Applications requiring automotive-grade certification must use the BZX84J-B56,115.

Q: Are there moisture sensitivity concerns with either part?

A: Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply to both components.

Q: What is the reverse leakage current difference?

A: The BZX84J-B56,115 specifies 50 nA maximum reverse leakage at 39.2 V, while the MM3Z56VB specifies 45 nA maximum. Both values are negligible for typical circuit applications and do not constitute a functional limitation.