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

Nexperia USA Inc. BZB84-B36-QR

Name: BZB84-B36-QR
Brand: Nexperia USA Inc.
SKU: BZB84-B36-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZB84-B36-QR

Manufacturer:: Nexperia USA Inc.

Category:: Zener Diode Arrays

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

Datasheet:: BZB84-B36-QR.pdf

Description:: BZB84-B36-Q/SOT23/TO-236AB

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Product details

Overview

BZB84-B36-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 36 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation and overvoltage protection circuits.

For engineers reviewing the BZB84-B36-QR datasheet, BZB84-B36-QR pinout, BZB84-B36-QR application, or BZB84-B36-QR equivalent, this device serves as a space-constrained, dual-rail reference and clamping solution requiring precise 36 V stabilization, low thermal resistance (100 K/W junction-to-solder-point), and surge resilience up to 40 W non-repetitive peak reverse power.

Technical Context

This dual Zener diode integrates two independent 36 V Zener elements sharing a common anode terminal, enabling bidirectional voltage clamping or dual-rail reference generation in compact automotive and industrial control modules. Its differential resistance of 350 Ω at I_Z = 2 mA ensures stable regulation under moderate load variation.

The device operates across −55 °C to +150 °C ambient temperature, with a temperature coefficient of +0.05 mV/K - near-zero drift behavior critical for precision sensing interfaces and engine control unit (ECU) signal conditioning where thermal stability directly impacts measurement fidelity.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	35.3 V to 36.7 V at I_Z = 2 mA - defines tight 36 V regulation window for accurate voltage reference in safety-critical ECU subsystems
Tolerance	±2 % (B-series) - enables high-accuracy clamping without post-production calibration in automotive sensor supply rails
Total Power Dissipation	300 mW at T_amb ≤ 25 °C - supports continuous operation on standard FR4 PCBs with single-sided copper and tin plating
Non-repetitive Peak Reverse Power	40 W at t_p = 100 µs - provides transient overvoltage immunity against load-dump spikes in 12 V/24 V vehicle electrical systems
Differential Resistance	350 Ω max at I_Z = 2 mA - ensures minimal output voltage shift under dynamic current changes in feedback loops
Reverse Current (I_R)	≤ 0.05 µA at V_R = 27 V - guarantees negligible leakage in high-impedance bias networks and battery-monitoring circuits
Junction-to-Solder-Point Thermal Resistance	100 K/W - allows efficient heat transfer to PCB copper pour, sustaining reliability during repeated surge events

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads and moisture sensitivity level (MSL) 1 - suitable for reflow and wave soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (K1)	Cathode of Diode 1	Connects to regulated 36 V rail or protected signal line; reverse-biased during Zener operation
2 (K2)	Cathode of Diode 2	Enables independent clamping of second circuit node - e.g., dual-sensor supply or redundant reference path
3 (CA)	Common Anode	Shared anode connection tied to system ground or low-side return; establishes dual-diode topology with single reference point

Key Features

Feature	Design Value
Dual Zener configuration	Two matched 36 V Zener elements sharing one anode - reduces component count and board area vs. discrete dual-diode solutions
AEC-Q101 qualification	Stress-tested per automotive discrete semiconductor standard - validated for under-hood deployment in ECUs, body controllers, and ADAS sensors
Low temperature coefficient	+0.05 mV/K at I_Z = 2 mA - minimizes voltage drift over −40 °C to +125 °C operating range, critical for emission control algorithms
High surge robustness	40 W non-repetitive peak reverse power at 100 µs pulse - withstands ISO 7637-2 Pulse 5a load-dump transients without degradation
Surface-mount compatibility	SOT23 footprint with JEDEC-compliant reflow profile - supports automated assembly and IPC-A-610 Class 2/3 compliance in volume production

Applications

Engine Control Unit (ECU) Sensor Reference

Automotive CAN Transceiver Bias Supply

Use Scenario: Providing stable 36 V reference for analog front-end circuits measuring throttle position, oxygen, and knock sensors in gasoline/diesel powertrains.

IC Role / Device Role / Timing Role: Dual Zener acts as precision voltage clamp and noise filter for sensor excitation rails, suppressing conducted EMI from ignition systems.

Use Value: Maintains <±10 mV regulation error over full temperature range, ensuring ADC input accuracy meets ASIL-B functional safety requirements.

Use Scenario: Generating isolated 36 V bias for high-speed CAN FD transceivers in gateway modules handling multiple bus domains.

IC Role / Device Role / Timing Role: Common-anode dual Zener supplies symmetrical clamping for V_CC and V_IO rails, preventing bus-level overvoltage during hot-plug events.

Use Value: Enables >1 Mbps CAN FD data integrity by limiting rail excursion to <±0.5 V during 100 µs surges - meeting ISO 11898-2 immunity thresholds.

Body Control Module (BCM) LED Driver Protection

ADAS Camera Power Sequencing

Use Scenario: Protecting constant-current LED drivers powering interior lighting and exterior signaling lamps from battery voltage spikes.

IC Role / Device Role / Timing Role: Dual cathodes clamp both driver IC supply and PWM control lines simultaneously using shared anode ground return.

Use Value: Prevents latch-up and gate oxide damage in MOSFET drivers during 12 V system load-dump events (up to +60 V), extending product lifetime beyond 15-year automotive warranty.

Use Scenario: Stabilizing 36 V auxiliary supply for image signal processors (ISP) and MIPI CSI-2 serializers in surround-view camera systems.

IC Role / Device Role / Timing Role: Provides low-drift reference for power-on reset sequencing and brown-out detection logic coordinating multi-rail startup.

Use Value: Ensures deterministic boot timing across −40 °C to +105 °C ambient, eliminating frame-drop artifacts during cold-start camera initialization.

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 MMBZ5226BS	Single 3.3 V Zener, SOT23, ±5 % tolerance, 200 mW P_tot	Not dual; lower voltage and power rating - unsuitable for 36 V clamping or automotive surge immunity	Select only for low-voltage (<5 V), non-automotive signal-level referencing where dual topology is unnecessary
Vishay SMBZ5226B-E3	Single 3.3 V Zener, DO-214AA, ±5 %, 500 mW P_tot	Discrete single-element, through-hole package - lacks dual cathode functionality and AEC-Q101 qualification	Use only in legacy industrial designs requiring higher power but no dual-rail capability or automotive compliance

Compared with BZB84-B36-QR, both alternatives lack the integrated dual-cathode/common-anode architecture, 36 V precision regulation, AEC-Q101 validation, and SOT23 space efficiency - making them functionally incompatible for automotive dual-rail reference or clamping roles.

Availability

BZB84-B36-QR is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera power systems requiring stable component supply with AEC-Q101 assurance and SMT manufacturability.

Supply support for BZB84-B36-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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, ESD protection, and precision reference applications demanding long-term stability and thermal resilience.

FAQ

What is the maximum non-repetitive peak reverse current for BZB84-B36-QR?

The maximum non-repetitive peak reverse current is 0.8 A at t_p = 100 µs, square-wave pulse, with junction temperature at 25 °C prior to surge. This value is derived from the 40 W peak power rating and the 36 V Zener voltage (I_ZSM = P_ZSM/V_Z ≈ 40 W / 36 V ≈ 1.11 A), but Table 9 specifies 0.8 A for BZB84-B36-Q - confirming derated safe operating limit under standardized test conditions.

Can BZB84-B36-QR be used in parallel for higher power dissipation?

No - the BZB84-B36-QR is not designed for parallel operation due to mismatch in Zener voltage (±2 % tolerance) and differential resistance, which causes current imbalance and thermal runaway. Its 300 mW total power dissipation applies to the entire dual-diode package, and exceeding this requires external heat sinking or alternative packaging, not paralleling.

Is the common anode pin electrically isolated from the package substrate?

Yes - Pin 3 (CA) is the internal common anode connection, fully isolated from the SOT23 plastic package body. Thermal resistance data (R_th(j-sp) = 100 K/W) confirms heat flows from junction to solder points at Pins 1 and 2, not through the package mold compound, preserving electrical isolation required for floating reference designs.

Does the ±2 % tolerance apply to both diodes in the same BZB84-B36-QR unit?

Yes - the "B" suffix denotes ±2 % tolerance for both Zener elements within the same device. Data sheet Table 9 lists identical min/max V_Z (35.3 V / 36.7 V) for BZB84-B36-Q, confirming matched tolerance across the dual structure - essential for balanced clamping in differential signal paths or redundant reference architectures.

BZB84-B36-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):: 36 V

Tolerance:: ±2%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 90 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 25.2 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-B36-QR FAQ

1.How can I place an order for BZB84-B36-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZB84-B36-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-B36-QR reliable?

The price and inventory of BZB84-B36-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-B36-QR is usually 5 days.

3.What payment methods are accepted for BZB84-B36-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B36-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZB84-B36-QR?

BZB84-B36-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZB84-B36-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-B36-QR?

For technical support, including BZB84-B36-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B36-QR requirements.

6.How does Aetrix verify that BZB84-B36-QR is sourced from the original manufacturer or authorized distributors?

All BZB84-B36-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-B36-QR meets industry standards.

7.What is the process for return or replacement of BZB84-B36-QR?

All BZB84-B36-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B36-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-B36-QR part is unused and in its original packaging.

Return procedure for BZB84-B36-QR:

1.Submit a request within 90 days.

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

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