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Nexperia USA Inc. BZB84-B12-QR
- Part No.:
- BZB84-B12-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B12-QR.pdf
- Description:
- BZB84-B12-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,150
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Product details
Overview
BZB84-B12-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 12 V nominal working voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation. It provides stable dual-voltage reference in compact surface-mount design for space-constrained power rail supervision.
For engineers reviewing the BZB84-B12-QR datasheet, BZB84-B12-QR pinout, BZB84-B12-QR application, or BZB84-B12-QR equivalent, key selection criteria include its dual-Zener topology, ±2 % voltage tolerance, common-anode terminal arrangement, and automotive-grade surge capability up to 40 W non-repetitive peak reverse power.
Technical Context
This dual Zener diode integrates two independent 12 V Zener elements sharing a common anode (Pin 3), enabling simultaneous regulation of two separate circuits or redundant reference paths from a single footprint. Its differential resistance is ≤150 Ω at IZ = 5 mA, supporting stable regulation under varying load conditions.
The device operates across –55 °C to +150 °C ambient temperature, with junction-to-ambient thermal resistance of 417 K/W on FR4 PCB, and exhibits a positive temperature coefficient of +6.0 mV/K at IZ = 5 mA - critical for thermal drift compensation in precision analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 12 V ±2 % - tight tolerance enables accurate dual-rail voltage clamping without external trimming |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling per device |
| Non-repetitive Peak Reverse Power | 40 W (tp = 100 µs) - supports transient overvoltage suppression in automotive load-dump events |
| Forward Voltage | ≤0.9 V at IF = 10 mA - ensures low-loss forward conduction when used as clamp or protection diode |
| Reverse Current | ≤0.1 µA at VR = 9.4 V - guarantees minimal leakage in high-impedance reference nodes |
| Differential Resistance | ≤150 Ω at IZ = 5 mA - determines output impedance and regulation sensitivity to current variation |
| Temperature Coefficient | +6.0 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal stability analysis |
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 standard FR4 solder footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node 1; reverse-biased during Zener operation |
| 2 (K2) | Cathode of Diode 2 | Connects to regulated node 2; enables independent clamping of two signals |
| 3 (CA) | Common Anode | Shared anode connection; ties both Zeners to same reference potential (e.g., ground or supply rail) |
Key Features
| Feature | Design Value |
|---|---|
| Dual Zener topology | Two independent 12 V Zener elements in one SOT23 - reduces board area and component count vs. discrete dual-diode solutions |
| AEC-Q101 qualification | Qualified for automotive applications - meets stress-test requirements for temperature cycling, HTRB, and ESD robustness |
| ±2 % voltage tolerance | Tighter than standard ±5 % C-series - improves accuracy in feedback loops and reference circuits without calibration |
| Common-anode configuration | Pins 1 and 2 are cathodes, Pin 3 is shared anode - simplifies layout for dual-rail clamping to a common return path |
| Low thermal resistance | Rth(j-sp) = 100 K/W to solder point - enhances power handling during short surges by improving heat transfer to PCB copper |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating dual 12 V sensor supply rails in harsh-temperature engine bay environments. IC Role / Device Role / Timing Role: Dual Zener voltage clamp providing stable reference and overvoltage protection for analog front-end ICs. Use Value: Eliminates need for two separate Zeners while maintaining AEC-Q101 compliance and thermal margin up to 150 °C junction temperature. |
Use Scenario: Providing matched 12 V references for dual-channel ADC drivers in factory automation PLC input modules. IC Role / Device Role / Timing Role: Precision dual-voltage reference source with <±2 % tolerance ensuring consistent gain calibration across channels. Use Value: Reduces BOM count and layout complexity versus discrete Zener pairs, with verified long-term stability under 85 °C continuous operation. |
| Automotive Infotainment Power Sequencing | Medical Diagnostic Equipment Power Monitoring |
Use Scenario: Clamping auxiliary 12 V logic rails during cold-crank and load-dump transients in head unit power management. IC Role / Device Role / Timing Role: Transient voltage suppressor with 40 W non-repetitive surge rating protecting downstream PMICs and microcontrollers. Use Value: Withstands ISO 7637-2 Pulse 5a (load dump) events without degradation due to AEC-Q101-qualified construction. |
Use Scenario: Generating redundant 12 V references for isolated power monitor comparators in portable ultrasound battery packs. IC Role / Device Role / Timing Role: Dual-reference diode enabling cross-checked voltage monitoring to detect single-point failures in safety-critical power paths. Use Value: Common-anode architecture allows fault-tolerant design where failure of one Zener does not disable the second reference path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZB84-C12-Q | ±5 % voltage tolerance (vs. ±2 %); otherwise identical package, pinout, and surge rating | Lower accuracy suitable for non-critical biasing but insufficient for precision feedback loops | Select when cost sensitivity outweighs voltage accuracy requirements and AEC-Q101 compliance remains mandatory |
| MMBZ5242B | Single Zener (12 V, ±5 %), SOT23 package, no common-anode dual configuration | Requires two devices and extra routing for dual-rail use; lacks integrated dual topology | Choose only if dual functionality is unnecessary and legacy single-Zener designs must be maintained |
Compared with BZB84-C12-Q, the BZB84-B12-QR delivers tighter voltage control essential for closed-loop regulation; versus MMBZ5242B, it eliminates component duplication and interconnect parasitics inherent in discrete dual implementations.
Availability
BZB84-B12-QR is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply with AEC-Q101 assurance and SOT23 footprint compatibility.
Supply support for BZB84-B12-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 efficiency-driven, high-volume logic, discrete, and MOSFET solutions with strong automotive and industrial market presence.
The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, designed specifically for dual-voltage regulation and transient suppression in automotive power systems and ruggedized industrial controls.
FAQ
What is the maximum continuous reverse current the BZB84-B12-QR can sustain at 12 V?
The device is rated for a maximum continuous forward current of 200 mA per diode, but Zener operation occurs in reverse bias. At nominal 12 V regulation, the recommended test current is 5 mA; sustained operation above 50 mA requires thermal derating per the 300 mW total power limit and ambient temperature conditions specified in the datasheet.
Can BZB84-B12-QR replace two separate single-Zener diodes in a circuit?
Yes - its dual common-anode configuration directly replaces two discrete 12 V Zeners sharing a common reference node. Pin 3 (CA) serves as the shared anode, while Pins 1 and 2 provide independent cathodes, eliminating interconnect inductance and layout asymmetry present in discrete implementations.
Is the 40 W non-repetitive peak reverse power rating applicable to each diode or the entire device?
The 40 W rating applies per diode, as confirmed in Table 5 (Limiting values) and Figure 1 of the datasheet. Both diodes may be subjected to simultaneous 40 W surges provided total device power dissipation remains within thermal limits and PCB layout supports adequate heat dissipation.
How does the +6.0 mV/K temperature coefficient affect system-level voltage accuracy?
At IZ = 5 mA, the coefficient means the Zener voltage increases by 6.0 mV per °C rise in junction temperature. Over a 125 °C range (–40 °C to +85 °C ambient), this introduces up to ±75 mV drift - acceptable for non-precision applications but requires compensation in high-accuracy references using external thermistors or digital calibration.
BZB84-B12-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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 150 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-B12-QR FAQ
1.How can I place an order for BZB84-B12-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B12-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-B12-QR reliable?
The price and inventory of BZB84-B12-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-B12-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B12-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B12-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B12-QR?
BZB84-B12-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B12-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-B12-QR?
For technical support, including BZB84-B12-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B12-QR requirements.
6.How does Aetrix verify that BZB84-B12-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B12-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-B12-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B12-QR?
All BZB84-B12-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B12-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-B12-QR part is unused and in its original packaging.
Return procedure for BZB84-B12-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-B12-QR Tags
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