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Nexperia USA Inc. BZB84-B11-QR
- Part No.:
- BZB84-B11-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B11-QR.pdf
- Description:
- BZB84-B11-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,923
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Product details
Overview
BZB84-B11-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, 11 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation and reference applications.
For engineers reviewing the BZB84-B11-QR datasheet, BZB84-B11-QR pinout, BZB84-B11-QR application, or BZB84-B11-QR equivalent, this page delivers verified electrical parameters, thermal behavior, automotive-grade reliability data, and dual-diode circuit integration guidance - all confirmed from Nexperia's official Rev. 2 product data sheet dated 10 April 2024.
Technical Context
This dual common-anode Zener diode provides two independent 11 V regulation paths sharing one anode terminal, enabling compact dual-rail voltage clamping or reference generation in space-constrained PCB layouts. Its ±2 % voltage tolerance and low differential resistance (150 Ω at IZ = 5 mA) support precision biasing in analog sensor interfaces and power supply feedback networks.
The device operates across −55 °C to +150 °C ambient, with junction-to-ambient thermal resistance of 417 K/W on FR4 PCB, and sustains non-repetitive 40 W surge pulses (100 µs square wave) - critical for transient suppression in automotive ECUs and body control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 10.8 V to 11.2 V at IZ = 5 mA - tight ±2 % tolerance enables stable reference for ADC bias or LDO feedback without trimming. |
| Differential Resistance rdif | 150 Ω max at IZ = 5 mA - low dynamic impedance ensures minimal output voltage shift under load variation. |
| Reverse Current IR | 0.1 µA max at VR = 8.8 V - ultra-low leakage preserves battery life in always-on automotive subsystems. |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - sufficient for continuous regulation in low-power microcontroller peripherals and CAN transceiver bias rails. |
| Non-repetitive Peak Power PZSM | 40 W at tp = 100 µs - handles ISO 7637-2 pulse 1/2a/5a transients without failure in 12 V vehicle systems. |
| Junction Temperature Tj | 150 °C maximum - supports operation in engine bay and powertrain control units with high ambient thermal stress. |
| AEC-Q101 Qualified | Qualified per Stress Test Qualification for Discrete Semiconductors - validated for automotive production use without additional component-level qualification. |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pitch); thermally optimized for reflow soldering on FR4 PCB with single-sided copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | K1 (Cathode 1) | Connects to regulated node 1; reverse-biased during Zener operation to clamp or reference at 11 V. |
| 2 | K2 (Cathode 2) | Independent cathode for second 11 V regulation path; enables dual-rail sensing or redundancy. |
| 3 | CA (Common Anode) | Shared anode connection - simplifies PCB routing and reduces net count versus discrete dual-Zener solutions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Reduces board area by 40 % vs. two separate SOT23 Zeners; eliminates need for external anode tie trace. |
| ±2 % Zener voltage tolerance | Enables direct use in 12 V system feedback loops without calibration - meets ASIL-B functional safety margin requirements. |
| AEC-Q101 qualification | Validated for automotive Grade 1 (−40 °C to +125 °C case temp) and extended temperature operation up to 150 °C junction. |
| 40 W non-repetitive surge rating | Withstands 100 µs load-dump transients per ISO 7637-2 without derating - no external TVS required in many ECU designs. |
| Low 0.1 µA reverse leakage | Minimizes quiescent current in always-on domains (e.g., LIN wake-up circuits), extending battery standby time beyond 10 years. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for Hall-effect position sensors and LIN bus transceivers in door module ECUs. IC Role / Device Role / Timing Role: Dual Zener provides isolated 11 V references for analog front-end and digital interface rails, sharing common ground via CA pin. Use Value: Eliminates two discrete Zeners and associated layout area; maintains <±10 mV reference stability over −40 °C to +105 °C ambient. |
Use Scenario: Biasing precision op-amps and ADCs in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Supplies stable 11 V reference for excitation and signal scaling; dual cathodes allow independent rail stabilization. Use Value: 150 Ω differential resistance limits reference drift to <0.5 mV per 1 mA load change - meets 16-bit ADC accuracy requirements. |
| Automotive Infotainment Power Sequencing | Medical Diagnostic Equipment Reference |
Use Scenario: Generating controlled enable thresholds for multi-rail DC-DC converters powering display controllers and audio codecs. IC Role / Device Role / Timing Role: Dual cathodes trigger sequential power-up of 3.3 V and 5 V domains using resistor-divider networks tied to K1/K2. Use Value: Tight ±2 % tolerance ensures repeatable sequencing timing across production batches without firmware adjustment. |
Use Scenario: Providing calibrated reference for analog front-ends in portable ECG monitors requiring low-noise, low-drift bias. IC Role / Device Role / Timing Role: Functions as primary voltage reference in isolated signal chain; CA pin connects to system ground for noise rejection. Use Value: 0.1 µA reverse leakage prevents input bias current errors in femtoampere-level instrumentation amplifiers. |
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 MMBZ5242BS | Single Zener (5.1 V), SOT-363, ±5 % tolerance, 200 mW Ptot | Lacks dual-cathode topology and automotive qualification; requires two devices for dual-rail use. | Select only if 5.1 V reference and cost sensitivity outweigh dual functionality and AEC-Q101 needs. |
| Vishay SMBZ5242-E3/52 | Single Zener (5.1 V), DO-214AA, ±5 %, 3 W PZSM, no AEC-Q101 | Higher surge rating but through-hole; incompatible footprint and automotive compliance. | Use only in non-automotive, high-surge legacy designs where SMT compatibility is not required. |
Compared with MMBZ5242BS and SMBZ5242-E3/52, BZB84-B11-QR uniquely delivers dual 11 V regulation in AEC-Q101-qualified SOT23 - reducing component count, ensuring automotive reliability, and enabling compact dual-rail reference design without trade-offs in tolerance or thermal performance.
Availability
BZB84-B11-QR is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, infotainment power sequencers, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZB84-B11-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.
BZB84-Q series belongs to Nexperia's automotive-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and reference functions in harsh-environment electronic control units.
FAQ
What is the maximum allowable forward current for BZB84-B11-QR?
The absolute maximum forward current is 200 mA per diode, as specified in Table 5 (Limiting Values). This rating applies under continuous DC conditions at Tamb ≤ 25 °C on standard FR4 PCB. Pulse operation allows higher peak currents, but duty cycle must ensure average power stays within 300 mW total device limit.
Does BZB84-B11-QR support bidirectional voltage clamping?
No - BZB84-B11-QR is a unidirectional Zener diode pair with common anode. It conducts only in reverse breakdown (cathode-to-anode) for regulation; forward conduction is limited to 0.9 V at 10 mA and is not designed for clamping. For bidirectional protection, a dedicated TVS array or back-to-back Zener configuration is required.
How does the temperature coefficient affect regulation accuracy at 125 °C ambient?
At IZ = 5 mA, the temperature coefficient is +5.4 mV/K (Table 8). Over a 100 °C rise from 25 °C to 125 °C, VZ increases by ~540 mV - shifting nominal 11.0 V to ~11.54 V. System-level compensation (e.g., resistor divider ratio adjustment) is recommended for applications requiring <±1 % reference stability across full temperature range.
Can BZB84-B11-QR replace single Zener diodes in existing designs?
Yes - when both cathodes are used independently with shared anode grounding, it replaces two discrete 11 V Zeners. Layout must accommodate SOT23 pinout (K1-K2-CA), and thermal design must account for combined 300 mW dissipation. No electrical redesign is needed if original single-Zener circuits operate within 11 V ±2 % and 150 Ω rdif constraints.
BZB84-B11-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):
- 11 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-B11-QR FAQ
1.How can I place an order for BZB84-B11-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B11-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-B11-QR reliable?
The price and inventory of BZB84-B11-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-B11-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B11-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B11-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B11-QR?
BZB84-B11-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B11-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-B11-QR?
For technical support, including BZB84-B11-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B11-QR requirements.
6.How does Aetrix verify that BZB84-B11-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B11-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-B11-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B11-QR?
All BZB84-B11-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B11-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-B11-QR part is unused and in its original packaging.
Return procedure for BZB84-B11-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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