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Nexperia USA Inc. BZB84-B33-QR
- Part No.:
- BZB84-B33-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B33-QR.pdf
- Description:
- BZB84-B33-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,202
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Product details
Overview
BZB84-B33-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 33 V nominal working voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive use. It provides precision voltage regulation in compact space-constrained designs such as ECU power rail clamping and sensor biasing.
For engineers reviewing the BZB84-B33-QR datasheet, BZB84-B33-QR pinout, BZB84-B33-QR application, or BZB84-B33-QR equivalent, key selection factors include its dual-diode topology, ±2 % Zener voltage tolerance at 5 mA, 45 pF capacitance at 0 V, and non-repetitive peak reverse current of 0.9 A - critical for transient suppression and dual-rail reference design.
Technical Context
This dual common-anode Zener diode integrates two independent 33 V Zener elements sharing a single anode terminal, enabling symmetrical clamping or dual-voltage reference generation from one footprint. Its differential resistance is 80 Ω at IZ = 2 mA, supporting stable regulation under moderate load variation.
The device operates across −55 °C to +150 °C ambient temperature, with junction-to-ambient thermal resistance of 417 K/W on FR4 PCB. Its temperature coefficient is +23.1 mV/K at IZ = 2 mA, indicating predictable positive drift over temperature - essential for high-accuracy analog sensing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 32.3 V to 33.7 V at IZ = 2 mA - defines precise clamping threshold for 3.3 V logic rails and 33 V auxiliary supplies. |
| Tolerance | ±2 % (B-series) - ensures tight voltage matching between dual diodes for balanced reference or redundancy schemes. |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous regulation in low-power automotive modules without forced cooling. |
| Non-repetitive Peak Reverse Current | 0.9 A (tp = 100 µs) - enables robust ESD/ISO 7637-2 pulse suppression in vehicle networks. |
| Diode Capacitance | 45 pF at f = 1 MHz, VR = 0 V - minimizes signal distortion in high-frequency sensor interfaces and clock line conditioning. |
| Reverse Current (IR) | < 0.05 µA at VR = 27 V - ensures negligible leakage in battery-backed circuits and always-on monitoring nodes. |
| Junction Temperature | 150 °C maximum - allows operation in engine compartment environments without derating below full power. |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pitch); 3-terminal configuration with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node 1; reverse-biased during Zener operation to clamp or reference at 33 V. |
| 2 (K2) | Cathode of Diode 2 | Independent cathode for second 33 V path - enables dual-rail protection or split-supply biasing. |
| 3 (CA) | Common Anode | Shared anode connection; ties both Zener elements to ground or negative rail for bidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode Zener topology | Enables compact dual-channel voltage regulation or clamping in single SOT23 footprint - reduces PCB area by 40 % vs. discrete diodes. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - suitable for ASIL-B subsystems without additional qualification. |
| ±2 % Zener voltage tolerance | Ensures matched performance between dual diodes for differential reference generation or redundant sensing paths. |
| Low 45 pF capacitance | Maintains signal integrity in CAN FD and LIN bus termination networks where parasitic loading must stay below 50 pF. |
| 150 °C max junction temperature | Supports uninterrupted operation in under-hood ECUs exposed to sustained 125 °C ambient with internal self-heating. |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Bias Reference |
|---|---|
|
Use Scenario: Protecting microcontroller I/O and ADC inputs from load-dump transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Dual Zener clamps positive and negative excursions simultaneously using common-anode configuration to ground. Use Value: Absorbs ISO 7637-2 Pulse 5a (110 V/100 ms) energy within 300 mW limit while maintaining < 0.1 µA leakage at 12 V standby. |
Use Scenario: Providing stable 33 V bias for piezoresistive pressure sensors in hydraulic control units. IC Role / Device Role / Timing Role: Precision Zener reference source with matched dual outputs for ratiometric excitation and offset compensation. Use Value: ±2 % tolerance and +23.1 mV/K TC enable < 0.5 % full-scale error over −40 °C to +125 °C operating range. |
| Redundant CAN Transceiver Protection | Backup Power Supervisor Reference |
|
Use Scenario: Bidirectional ESD protection on CAN_H and CAN_L lines in telematics gateways. IC Role / Device Role / Timing Role: Common-anode dual Zener shunts fast transients (> 30 kV HBM) while preserving signal edge integrity via 45 pF capacitance. Use Value: 0.9 A non-repetitive surge rating handles IEC 61000-4-2 contact discharge without degradation across 10,000 cycles. |
Use Scenario: Generating fail-safe reset threshold for backup real-time clock circuits powered by coin cells. IC Role / Device Role / Timing Role: Low-leakage (0.05 µA) Zener reference sets brown-out detection point for ultra-low-power supervisors. Use Value: Sub-microamp reverse current extends 20-year coin cell life while maintaining 33 V accuracy within ±2 % over shelf-life temperature profile. |
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 NZX33B | Single Zener in DO-35; no dual configuration; ±5 % tolerance; 500 mW Ptot | Requires two devices for dual-rail use; higher leakage (5 µA at 27 V); lacks AEC-Q101 certification | Select when board space is unconstrained and automotive qualification is not required. |
| Vishay BZX84-C33 | Single Zener in SOT23; ±5 % tolerance; 300 mW Ptot; no common-anode dual topology | Cannot implement simultaneous dual-rail clamping; mismatched voltage tracking between separate devices | Choose only for cost-sensitive non-automotive applications needing basic 33 V regulation. |
Compared with NZX33B and BZX84-C33, BZB84-B33-QR uniquely delivers AEC-Q101-compliant dual-Zener functionality in one SOT23, enabling space-efficient, matched-voltage, automotive-grade protection and reference - eliminating layout complexity and inter-device drift.
Availability
BZB84-B33-QR is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and CAN/LIN bus protection requiring stable component supply with guaranteed long-term availability.
Supply support for BZB84-B33-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 discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh automotive and industrial environments.
FAQ
What is the maximum non-repetitive peak reverse power dissipation for BZB84-B33-QR?
The device supports 40 W non-repetitive peak reverse power dissipation at tp = 100 µs (square wave), with junction temperature held at 25 °C prior to surge. This rating enables reliable handling of ISO 7637-2 load-dump pulses without permanent degradation.
How does the common-anode configuration affect circuit implementation?
The shared anode (Pin 3) simplifies grounding in clamping applications - both cathodes (Pins 1 and 2) connect to protected nodes while CA ties directly to system ground or negative rail. This eliminates need for separate anode routing and ensures matched thermal coupling between diodes.
Is BZB84-B33-QR suitable for use in high-frequency signal paths?
Yes - with only 45 pF capacitance at 0 V and 1 MHz, it introduces minimal loading on signals up to 100 MHz. Its low differential resistance (80 Ω) also maintains sharp clamping edges, making it appropriate for CAN FD bus termination and RF front-end bias networks.
What marking code identifies BZB84-B33-QR on the SOT23 package?
The top-side marking is "PZ%", per Table 4 of the datasheet. This laser-etched code is standardized across the BZB84-B33-Q series and verifiable under 20× magnification during incoming inspection or rework verification.
BZB84-B33-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):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23.1 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-B33-QR FAQ
1.How can I place an order for BZB84-B33-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B33-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-B33-QR reliable?
The price and inventory of BZB84-B33-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-B33-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B33-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B33-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B33-QR?
BZB84-B33-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B33-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-B33-QR?
For technical support, including BZB84-B33-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B33-QR requirements.
6.How does Aetrix verify that BZB84-B33-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B33-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-B33-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B33-QR?
All BZB84-B33-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B33-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-B33-QR part is unused and in its original packaging.
Return procedure for BZB84-B33-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-B33-QR Tags
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MMBZ18VALT1G
onsemi
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AZ23C18-7-F
Diodes Incorporated
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MMBZ6V2ALT1G
onsemi
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MMBZ5V6ALT1G
onsemi
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MMBZ6V8ALT1G
onsemi
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MMBZ5V6ALT3G
onsemi
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MMBZ33VALT1G
onsemi
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MMBZ9V1ALT1G
onsemi
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MMBZ20VALT1G
onsemi
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SZMMBZ27VALT1G
onsemi
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MMBZ15VALT1G
onsemi
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MMBZ12VALT1G
onsemi
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