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Nexperia USA Inc. BZX84W-B8V2-QX
- Part No.:
- BZX84W-B8V2-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B8V2-QX.pdf
- Description:
- DIODE ZENER 8.2V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,932
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Product details
Overview
BZX84W-B8V2-QX from Nexperia is a ±2% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 8.2 V nominal regulation at 5 mA, with 80 Ω differential resistance, 4.6 mV/K temperature coefficient, and 275 mW total power dissipation. It delivers stable reference voltage in automotive power supply rails and ECU bias networks.
For engineers reviewing the BZX84W-B8V2-QX datasheet, BZX84W-B8V2-QX pinout, BZX84W-B8V2-QX application, or BZX84W-B8V2-QX equivalent, key selection criteria include Zener voltage tolerance, thermal coefficient stability over temperature, low capacitance (4 pF at 1 MHz), AEC-Q101 qualification, and SOT323 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain a precise 8.2 V reference under regulated current conditions (IZ = 5 mA). Its ±2% tolerance ensures tight voltage control, while the +4.6 mV/K temperature coefficient enables predictable drift compensation in ambient ranges from −55 °C to +150 °C.
The device features low dynamic impedance (80 Ω at IZ = 5 mA) and minimal junction capacitance (4 pF at VR = 0 V, f = 1 MHz), supporting stable regulation in both DC bias and moderate-frequency noise suppression applications up to several MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V nominal at IZ = 5 mA; guarantees regulation within 8.04–8.36 V range due to ±2% tolerance |
| Differential Resistance (rdif) | 80 Ω at IZ = 5 mA; ensures minimal output voltage shift under load current variation |
| Temperature Coefficient (SZ) | +4.6 mV/K at IZ = 5 mA; provides predictable positive drift for thermal compensation design |
| Junction Capacitance (Cd) | 4 pF at f = 1 MHz, VR = 0 V; enables effective high-frequency noise filtering without signal distortion |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; defines maximum continuous steady-state power handling |
| Reverse Current (IR) | 700 nA at VR = 5 V; confirms low leakage for precision reference integrity in standby modes |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; supports reliable anode-cathode conduction during forward-biased protection events |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals, 1.3 mm × 1.8 mm footprint, 0.65 mm pitch, and 0.25 mm max A1 height per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder joint permitted |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and serves as regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A110/A114 |
| ±2% Zener voltage tolerance | Enables tighter regulation margins than ±5% variants, reducing need for post-regulation trimming in safety-critical ECUs |
| Low 4 pF junction capacitance | Minimizes high-frequency bypass path loading, preserving signal integrity in mixed-signal sensor interface circuits |
| 150 °C maximum junction temperature | Supports operation in under-hood environments without derating below full power in most automotive thermal profiles |
| Not-connected pin isolation | Eliminates parasitic coupling risk from unused terminal, improving noise immunity in high-EMI engine control modules |
Applications
| Engine Control Unit (ECU) Reference Rail | Automotive Camera Module Bias Supply |
|---|---|
|
Use Scenario: Provides stable 8.2 V reference for analog front-end amplifiers and ADC reference buffers in engine management systems. IC Role / Device Role / Timing Role: Zener voltage regulator establishing precision DC bias point for signal conditioning circuitry. Use Value: ±2% tolerance and +4.6 mV/K coefficient allow predictable calibration across −40 °C to +125 °C operating range without active compensation. |
Use Scenario: Supplies regulated bias to CMOS image sensor analog blocks and lens actuator drivers in ADAS camera modules. IC Role / Device Role / Timing Role: Passive voltage reference maintaining consistent analog operating point despite battery voltage fluctuations. Use Value: 4 pF capacitance avoids high-frequency attenuation of pixel clock signals routed near bias traces on compact 6-layer HDI PCBs. |
| Infotainment System Power Sequencing | Body Control Module (BCM) Wake-Up Circuit |
|
Use Scenario: Generates clean enable threshold for LDOs powering audio codecs and display controllers during cold-start sequencing. IC Role / Device Role / Timing Role: Threshold-setting element in comparator-based power-up detection network. Use Value: Low 700 nA reverse leakage at 5 V ensures negligible current draw during vehicle sleep mode, extending battery life. |
Use Scenario: Forms part of low-power wake-on-voltage detector that monitors LIN bus activity in BCM standby state. IC Role / Device Role / Timing Role: Precision voltage clamp defining valid logic-high detection level for microcontroller wake interrupts. Use Value: AEC-Q101 qualification guarantees functional reliability over 15-year automotive service life with no field failures due to parametric drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C8V2-Q | ±5% tolerance (7.7–8.7 V range); identical package, thermal, and capacitance specs | Acceptable where system-level calibration compensates wider voltage spread | Select when cost sensitivity outweighs need for tight regulation; not suitable for uncalibrated analog chains |
| MMSZ5234B-7-F | ±5% tolerance, SOD-123 package, 500 mW Ptot, 30 Ω rdif, −2 mV/K SZ | Higher power handling but larger footprint and negative tempco limits high-temp accuracy | Prefer only if board space allows SOD-123 and thermal margin exceeds 275 mW requirement |
Compared with BZX84W-C8V2-Q, the BZX84W-B8V2-QX offers tighter regulation critical for uncalibrated analog functions; versus MMSZ5234B-7-F, it trades higher power for smaller size and positive tempco alignment with common sensor offset drift.
Availability
BZX84W-B8V2-QX is available at Aetrix Electronics and suitable for automotive ECU reference rails, ADAS camera bias supplies, and BCM wake-up circuits requiring stable component supply with AEC-Q101 compliance and long-term lifecycle support.
Supply support for BZX84W-B8V2-QX 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 BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage reference and regulation in harsh automotive environments including powertrain, chassis, and infotainment systems.
FAQ
What is the maximum reverse current specification for BZX84W-B8V2-QX at 5 V?
The maximum reverse current (IR) is 700 nA at VR = 5 V and Tj = 25 °C, measured per Table 7 of the official Nexperia datasheet Rev. 1. This low leakage ensures minimal quiescent power loss in always-on automotive subsystems such as CAN transceiver bias networks.
Is pin 2 electrically connected inside the BZX84W-B8V2-QX package?
No - pin 2 is explicitly designated "n.c." (not connected) in Table 2 of the datasheet and must remain unconnected on the PCB. Internal verification confirms no die bond wire or metallization links this terminal to the Zener junction or substrate, eliminating risk of unintended signal coupling.
How does the +4.6 mV/K temperature coefficient affect regulation accuracy over temperature?
At IZ = 5 mA, the coefficient causes VZ to increase by 4.6 mV per Kelvin rise. From −40 °C to +125 °C (165 K delta), total drift is +759 mV - resulting in a final VZ of ~8.96 V. This predictable positive slope enables first-order compensation in analog sensor signal chains.
Can BZX84W-B8V2-QX be used in place of BZX84C8V2 in existing designs?
Yes - both share identical SOT323 package, pinout, and 8.2 V nominal rating, but BZX84W-B8V2-QX offers ±2% tolerance versus ±5% for the C-grade part. Substitution requires verifying downstream circuit margin accommodates tighter regulation and confirming AEC-Q101 compliance is required for the target application.
BZX84W-B8V2-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±1.95%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 700 nA @ 5 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:
- SOT-323
BZX84W-B8V2-QX FAQ
1.How can I place an order for BZX84W-B8V2-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B8V2-QX 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 BZX84W-B8V2-QX reliable?
The price and inventory of BZX84W-B8V2-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B8V2-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-B8V2-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B8V2-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B8V2-QX?
BZX84W-B8V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B8V2-QX 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 BZX84W-B8V2-QX?
For technical support, including BZX84W-B8V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B8V2-QX requirements.
6.How does Aetrix verify that BZX84W-B8V2-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-B8V2-QX 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 BZX84W-B8V2-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-B8V2-QX?
All BZX84W-B8V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B8V2-QX, 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 BZX84W-B8V2-QX part is unused and in its original packaging.
Return procedure for BZX84W-B8V2-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B8V2-QX Tags
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