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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Zener Diode Arrays

Nexperia USA Inc. BZB84-C56-QR

Name: BZB84-C56-QR
Brand: Nexperia USA Inc.
SKU: BZB84-C56-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZB84-C56-QR

Manufacturer:: Nexperia USA Inc.

Category:: Zener Diode Arrays

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BZB84-C56-QR.pdf

Description:: BZB84-C56-Q/SOT23/TO-236AB

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Product details

Overview

BZB84-C56-QR from Nexperia is a dual Zener diode in SOT23 package with common anode configuration, rated for 56 V nominal Zener voltage (±5 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive use. It provides precision voltage regulation in compact space-constrained circuits such as ECU power rail clamping and sensor biasing.

For engineers reviewing the BZB84-C56-QR datasheet, BZB84-C56-QR pinout, BZB84-C56-QR application, or BZB84-C56-QR equivalent, key selection criteria include dual-diode common-anode topology, 56 V Zener voltage tolerance, non-repetitive surge capability up to 40 W, and thermal resistance of 100 K/W junction-to-solder-point - all critical for automotive-grade transient suppression and reference stability.

Technical Context

This dual Zener diode integrates two independent 56 V Zener elements sharing a common anode terminal (Pin 3), enabling bidirectional voltage clamping or dual-rail referencing from a single footprint. Its ±5 % voltage tolerance (C-series) and 400 Ω typical differential resistance at I_Z = 2 mA ensure stable regulation under moderate load variation.

Qualified per AEC-Q101, it supports operation from −55 °C to +150 °C ambient, with thermal resistance from junction to solder point at 100 K/W - optimized for reflow-soldered FR4 PCBs with standard SOT23 footprints. The 0.05 μA reverse current at V_R = 45 V confirms low leakage in standby conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	52.0 V to 60.0 V (±5 % tolerance at I_Z = 2 mA); enables robust 56 V rail stabilization despite process drift
Total Power Dissipation P_tot	300 mW at T_amb ≤ 25 °C on FR4 PCB; defines continuous DC power handling in compact layouts
Non-repetitive Peak Reverse Power P_ZSM	40 W (t_p = 100 μs, square wave); supports automotive load-dump and ISO 7637-2 pulse suppression
Differential Resistance r_dif	425 Ω max at I_Z = 2 mA; determines regulation stiffness and output impedance in feedback paths
Reverse Current I_R	0.05 μA max at V_R = 45 V; ensures minimal quiescent current draw in always-on automotive modules
Junction Temperature T_j	150 °C maximum; allows sustained operation in engine bay or powertrain control units
Thermal Resistance R_th(j-sp)	100 K/W junction-to-solder-point; enables accurate thermal modeling for PCB copper pour design

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pitch), qualified for automotive reflow and wave soldering per JEDEC standards.

Pin/Terminal	Circuit Role	Design Meaning
1 (K1)	Cathode of Diode 1	Connects to regulated node requiring 56 V clamping or reference; reverse-biased during normal operation
2 (K2)	Cathode of Diode 2	Independent cathode for second 56 V regulation path; enables dual-rail or redundancy without extra footprint
3 (CA)	Common Anode	Shared anode connection; ties both Zeners to system ground or negative rail - simplifies layout and reduces parasitic inductance

Key Features

Feature	Design Value
Dual common-anode Zener topology	Enables simultaneous regulation of two nodes from one SOT23 footprint - saves board area vs. discrete dual-Zener solutions
AEC-Q101 qualification	Validated for automotive applications including powertrain, body control, and ADAS modules - no additional qualification required
±5 % Zener voltage tolerance (C-series)	Provides cost-optimized precision for non-critical reference functions where tighter tolerance is unnecessary
40 W non-repetitive surge rating	Withstands ISO 7637-2 Pulse 1 (−150 V/50 Ω) and Pulse 2a (−100 V/2 Ω) without failure when properly decoupled
Low 0.05 μA reverse leakage at 45 V	Minimizes standby current in always-on vehicle networks (e.g., CAN wake-up circuits), extending battery life

Applications

Automotive ECU Power Rail Clamping

Industrial Sensor Bias Reference

Use Scenario: Protecting microcontroller I/O and analog front-end inputs against load dump transients in 12 V vehicle systems.

IC Role / Device Role / Timing Role: Dual Zener acts as bidirectional clamp between V_CC and GND, limiting voltage excursions to ±56 V while sharing common anode to minimize loop inductance.

Use Value: Eliminates need for separate TVS + Zener combo; 40 W surge rating handles ISO 7637-2 Pulse 5a without derating.

Use Scenario: Providing stable 56 V bias for high-voltage current-sense amplifiers in motor drives.

IC Role / Device Role / Timing Role: Functions as precision shunt reference for op-amp feedback networks, leveraging matched Zener characteristics across both diodes.

Use Value: 425 Ω max differential resistance ensures <1 % regulation error over 1–5 mA load range - sufficient for 12-bit ADC biasing.

Redundant Voltage Monitoring Node

Compact Dual-Rail Level Shifting

Use Scenario: Independent monitoring of two isolated 56 V auxiliary rails in battery management systems.

IC Role / Device Role / Timing Role: Each cathode (K1/K2) connects to separate rail; common anode tied to system ground - enables fault-isolated sensing with shared thermal path.

Use Value: Reduces component count by 50 % vs. two discrete SOT23 Zeners; 100 K/W R_th(j-sp) ensures correlated thermal drift for matched response.

Use Scenario: Level-shifting logic signals between 56 V and 3.3 V domains in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: One diode clamps high-side signal to 56 V rail, the other to GND - forming bidirectional protection pair around level translator IC.

Use Value: Common-anode structure minimizes inter-pin capacitance (<40 pF at 0 V), preserving signal integrity up to 1 MHz edge rates.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual Zener diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5256ET1G	Single 56 V Zener, SOT23, ±5 %, 500 mW P_tot, but no dual-diode topology	Requires two devices for dual-rail use; higher board area and thermal mismatch risk	Select only when dual-cathode functionality is unnecessary and higher continuous power is needed
Vishay BZX84-C56-TP	Single 56 V Zener, SOT23, ±5 %, 300 mW, AEC-Q101 qualified, but lacks common-anode dual configuration	Cannot perform simultaneous dual-node clamping; no shared thermal path for matched behavior	Choose when cost-per-device is prioritized over functional integration and layout efficiency

Compared with MMBZ5256ET1G and BZX84-C56-TP, BZB84-C56-QR uniquely delivers dual 56 V regulation in one AEC-Q101-qualified SOT23, reducing component count, improving thermal tracking, and enabling compact bidirectional clamping - essential for space- and reliability-critical automotive modules.

Availability

BZB84-C56-QR is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor biasing, redundant voltage monitoring, and compact dual-rail level shifting requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZB84-C56-QR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability essential semiconductors - delivering discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive power rail stabilization, transient suppression, and precision biasing where dual-element integration and thermal correlation matter.

FAQ

What is the maximum non-repetitive peak reverse current for BZB84-C56-QR?

The non-repetitive peak reverse current I_ZSM is 0.3 A, measured at t_p = 100 μs (square wave) with junction temperature at 25 °C prior to surge. This value is derived directly from Table 9 of the official Nexperia datasheet Rev. 2 (April 2024) and corresponds to the 56 V device in the C-tolerance series.

Can BZB84-C56-QR be used in place of a single Zener diode?

Yes - either cathode (K1 or K2) can be used independently with the common anode (CA) as the anode terminal, effectively operating as a single 56 V Zener. However, the unused cathode must be left floating or tied to CA; connecting it to another potential may forward-bias the second diode and compromise regulation.

What is the thermal resistance from junction to ambient for BZB84-C56-QR?

The junction-to-ambient thermal resistance R_th(j-a) is 417 K/W under free-air conditions on an FR4 PCB with single-sided copper and standard footprint. This value is specified in Table 6 of the Nexperia datasheet and applies to steady-state DC operation - not transient surge conditions.

How does the temperature coefficient behave at 56 V for this device?

At 56 V (C-series), the temperature coefficient S_Z is +0.05 mV/K, indicating near-zero TC behavior. This is confirmed in Table 9 (BZB84-C56-Q row) and reflects optimized doping for minimal V_Z drift over −55 °C to +150 °C - critical for stable reference performance in under-hood environments.

BZB84-C56-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZB84-Q

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Configuration:: 1 Pair Common Anode

Voltage - Zener (Nom) (Vz):: 56 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 200 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 39.2 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZB84-C56-QR FAQ

1.How can I place an order for BZB84-C56-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZB84-C56-QR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BZB84-C56-QR reliable?

The price and inventory of BZB84-C56-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZB84-C56-QR is usually 5 days.

3.What payment methods are accepted for BZB84-C56-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-C56-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZB84-C56-QR?

BZB84-C56-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZB84-C56-QR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BZB84-C56-QR?

For technical support, including BZB84-C56-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-C56-QR requirements.

6.How does Aetrix verify that BZB84-C56-QR is sourced from the original manufacturer or authorized distributors?

All BZB84-C56-QR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZB84-C56-QR meets industry standards.

7.What is the process for return or replacement of BZB84-C56-QR?

All BZB84-C56-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-C56-QR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BZB84-C56-QR part is unused and in its original packaging.

Return procedure for BZB84-C56-QR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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