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Nexperia USA Inc. BZX84W-B8V2-QF
- Part No.:
- BZX84W-B8V2-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B8V2-QF.pdf
- Description:
- DIODE ZENER 8.2V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,449
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Product details
Overview
BZX84W-B8V2-QF 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-grade power supply rails and low-power analog circuitry.
For engineers reviewing the BZX84W-B8V2-QF datasheet, BZX84W-B8V2-QF pinout, BZX84W-B8V2-QF application, or BZX84W-B8V2-QF equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (455 K/W), reverse leakage (700 nA at 5 V), junction temperature limit (150 °C), and AEC-Q101 qualification status.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 8.2 V reference under regulated current conditions (IZ = 5 mA). Its ±2% tolerance ensures tight voltage control, while the 4.6 mV/K positive temperature coefficient compensates for thermal drift in mid-voltage range applications.
The device uses silicon planar technology in a leadless SOT323 package with anode (Pin 1), not-connected (Pin 2), and cathode (Pin 3) terminals. Thermal resistance of 455 K/W (junction-to-ambient, FR4 PCB) defines its derating behavior above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V nominal at IZ = 5 mA; guarantees 8.04–8.36 V range per ±2% tolerance |
| Differential Resistance (rdif) | 80 Ω max at IZ = 5 mA; determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +4.6 mV/K at IZ = 5 mA; quantifies voltage drift per degree Celsius rise |
| Reverse Leakage (IR) | 700 nA max at VR = 5 V; defines minimum bias current needed to avoid regulation dropout |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; sets maximum continuous DC power handling |
| Junction Temperature (Tj) | 150 °C absolute maximum; constrains thermal design margin in enclosed environments |
| AEC-Q101 Qualified | Yes; validated for automotive electronic systems requiring reliability under temperature cycling, humidity, and mechanical stress |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.3 mm × 1.75 mm footprint, 0.95 mm height, leadless construction with tin-plated terminations compatible with reflow and wave soldering per Figures 9–10 in datasheet.
| 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 mask required |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and serves as regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables precise voltage reference without post-production trimming in cost-sensitive automotive modules |
| AEC-Q101 qualification | Validates reliability for under-hood ECUs, body control units, and ADAS sensor interfaces |
| Low 700 nA reverse leakage at 5 V | Minimizes quiescent current draw in battery-powered always-on circuits (e.g., wake-up supervisors) |
| 80 Ω differential resistance | Supports stable regulation across ±10% load current variation in 3.3 V/5 V LDO feedback networks |
| SOT323 ultra-small footprint | Reduces PCB area by >50% vs. SOD-323; enables high-density layout in space-constrained modules |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Provides stable 8.2 V reference for microcontroller ADC input scaling in door module voltage monitoring. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precision analog reference rail. Use Value: Maintains <±0.5% reference accuracy over −40 °C to +125 °C ambient, meeting ISO 16750-4 requirements. |
Use Scenario: Regulates bias voltage for op-amp front-end stages in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Precision shunt regulator setting gain-setting node voltage. Use Value: Delivers 8.2 V ±2% stability with <1 µA leakage, enabling sub-0.1% full-scale error in 16-bit measurement systems. |
| Consumer IoT Power Sequencing | Medical Wearable Battery Monitoring |
Use Scenario: Generates clean enable threshold for PMIC sequencing in smart home hubs during cold start. IC Role / Device Role / Timing Role: Voltage threshold detector via resistor divider into comparator input. Use Value: Enables accurate 8.2 V trip point with <100 ppm/°C drift, eliminating need for external trim potentiometer. |
Use Scenario: Supplies reference voltage to fuel gauge IC in rechargeable Li-ion battery packs for portable ECG monitors. IC Role / Device Role / Timing Role: Low-leakage Zener reference for coulomb counter analog front end. Use Value: 700 nA max leakage at 5 V ensures <1 µA system standby current contribution, extending battery life beyond 7 days. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C8V2-Q | ±5% tolerance (8.2 V nominal range: 7.7–8.7 V); identical package, thermal, and leakage specs | Acceptable where reference accuracy <±5% suffices (e.g., non-critical power-good detection) | Select when cost reduction outweighs need for tight regulation; same footprint and assembly process |
| MMSZ5236B-TP | ±5% tolerance, 8.2 V nominal, SOD-123 package; 500 mW Ptot, 100 Ω rdif, 1 µA IR at 5 V | Higher power rating suits higher-current bias networks but requires larger PCB area | Choose for legacy designs using SOD-123 or where 500 mW headroom is required for transient surges |
Compared with BZX84W-C8V2-Q, the BZX84W-B8V2-QF offers tighter voltage control critical for precision analog functions; versus MMSZ5236B-TP, it trades 225 mW lower power for 40% smaller footprint and AEC-Q101 compliance essential in automotive electronics.
Availability
BZX84W-B8V2-QF is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, consumer IoT power sequencing, and medical wearable battery monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX84W-B8V2-QF 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 specializing in high-performance, reliable discrete, logic, and MOSFET devices, with leadership in automotive-grade components.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for stable voltage reference and regulation in harsh-environment automotive and industrial electronics.
FAQ
What is the maximum continuous reverse current this Zener can handle at 8.2 V?
The BZX84W-B8V2-QF is rated for 200 mA maximum forward current, but as a Zener regulator, its reverse current capability is defined by power dissipation. At 8.2 V, the maximum continuous reverse current is 33.5 mA (275 mW ÷ 8.2 V), assuming Tamb = 25 °C and proper PCB thermal relief per datasheet footnote [2]. Derating applies above 25 °C ambient.
Is Pin 2 truly unused, or does it serve a thermal or shielding function?
Pin 2 is explicitly designated "not connected" (n.c.) in Table 2 of the datasheet and has no internal bond wire or die connection. It serves no electrical, thermal, or shielding function-leaving it unconnected on the PCB is mandatory. No thermal pad or grounding is required or recommended.
How does the +4.6 mV/K temperature coefficient impact regulation accuracy over temperature?
At 8.2 V nominal, +4.6 mV/K means the Zener voltage increases by ~0.056% per °C. Over a −40 °C to +125 °C range (165 K delta), total shift is ~760 mV (9.3% of 8.2 V). However, actual drift is nonlinear and partially offset by circuit-level compensation; datasheet Fig. 7 shows typical SZ variation with current, confirming stability within ±0.3 V across full automotive range.
Can this diode be used in avalanche mode for ESD protection?
No. The BZX84W-B8V2-QF is designed exclusively for controlled Zener breakdown in regulation applications. Its 40 W non-repetitive peak reverse power rating (Table 5) applies only to short pulses (tp ≤ 100 µs), not ESD events. For ESD protection, Nexperia recommends dedicated TVS diodes like PESD5V0S1BA, which feature faster clamping and specified IEC 61000-4-2 performance.
BZX84W-B8V2-QF 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-QF FAQ
1.How can I place an order for BZX84W-B8V2-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B8V2-QF 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-QF reliable?
The price and inventory of BZX84W-B8V2-QF 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-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-B8V2-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B8V2-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B8V2-QF?
BZX84W-B8V2-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B8V2-QF 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-QF?
For technical support, including BZX84W-B8V2-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B8V2-QF requirements.
6.How does Aetrix verify that BZX84W-B8V2-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-B8V2-QF 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-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-B8V2-QF?
All BZX84W-B8V2-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B8V2-QF, 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-QF part is unused and in its original packaging.
Return procedure for BZX84W-B8V2-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B8V2-QF Tags
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