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Nexperia USA Inc. BZX84W-B2V7-QX
- Part No.:
- BZX84W-B2V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B2V7-QX.pdf
- Description:
- DIODE ZENER 2.7V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,567
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Product details
Overview
BZX84W-B2V7-Q from Nexperia is a ±2% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 2.7 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides stable reference voltage in low-power biasing, overvoltage clamping, and voltage sensing circuits.
For engineers reviewing the BZX84W-B2V7-Q datasheet, BZX84W-B2V7-Q pinout, BZX84W-B2V7-Q application, or BZX84W-B2V7-Q equivalent, this page delivers verified Zener parameters, automotive-grade reliability data, SOT323 terminal mapping, and direct replacement guidance for precision 2.7 V regulation.
Technical Context
This device operates as a two-terminal shunt voltage regulator with reverse-biased Zener breakdown at 2.7 V (±2%) under 5 mA test current. Its differential resistance is ≤600 Ω at 1 mA and ≤100 Ω at 5 mA, enabling stable regulation across load variations.
It features a negative temperature coefficient of −2.0 mV/K at 5 mA, ensuring predictable drift behavior in ambient ranges from −55 °C to +150 °C. The device supports non-repetitive surge capability up to 40 W for 100 µs pulses and exhibits 6 pF junction capacitance at 1 MHz and 0 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.65 V to 2.75 V at IZ = 5 mA - tight ±2% tolerance enables accurate 2.7 V reference in feedback loops |
| Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - defines maximum continuous DC or average pulsed power handling |
| Differential Resistance (rdif) | ≤100 Ω at IZ = 5 mA - low dynamic impedance ensures minimal output voltage variation under load changes |
| Reverse Current (IR) | 20 µA at VR = 1 V - low leakage preserves efficiency in high-impedance bias networks |
| Junction Capacitance (Cd) | 6 pF at f = 1 MHz, VR = 0 V - supports stable operation in high-frequency clamp and timing applications |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - enables predictable forward conduction in dual-direction protection schemes |
| Thermal Resistance (Rth(j-a)) | 455 K/W on standard FR4 - determines junction-to-ambient temperature rise under steady-state power |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals, footprint per Figure 9 (reflow) and Figure 10 (wave soldering).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected terminal - must remain floating; no PCB trace or solder mask relief required |
| 3 | Cathode (K) | Zener breakdown terminal; connected to higher-potential node and voltage reference output point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood and infotainment systems requiring extended temperature and reliability compliance |
| ±2% Zener voltage tolerance | Reduces need for post-production trimming in precision reference designs, improving yield and consistency |
| SOT323 ultra-small footprint | 1.3 mm × 2.2 mm body size enables dense layout in space-constrained modules like ADAS sensors and ECUs |
| Low 6 pF junction capacitance | Minimizes signal distortion in RF detector biasing and high-speed transient suppression paths |
| 40 W non-repetitive surge rating | Withstands ESD and load-dump transients without degradation when used with appropriate series impedance |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 2.7 V reference for MEMS pressure sensor signal conditioning in engine control units. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise bias point for op-amp input stages and ADC reference dividers. Use Value: ±2% VZ tolerance and −2.0 mV/K tempco ensure <±15 mV drift over −40 °C to +125 °C, meeting ASIL-B sensor accuracy requirements. |
Use Scenario: Clamping D+ and D− lines to prevent >3.3 V transients during hot-plug events in USB 2.0 automotive docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp limiting line voltage while preserving signal integrity. Use Value: 6 pF capacitance avoids signal edge degradation at 480 Mbps; 20 µA leakage prevents false enumeration during standby. |
| Industrial PLC Input Protection | Low-Power IoT Voltage Reference |
|
Use Scenario: Protecting 24 V digital input channels against induced surges and back-EMF in factory automation controllers. IC Role / Device Role / Timing Role: Primary shunt clamp absorbing transient energy before it reaches downstream optocoupler or MCU GPIO. Use Value: 40 W peak surge rating handles 100 µs spikes up to 100 V; 275 mW Ptot allows sustained 2.7 V clamping during brown-out recovery. |
Use Scenario: Generating stable 2.7 V reference for nanopower RTC and wake-up comparators in battery-powered smart meters. IC Role / Device Role / Timing Role: Precision Zener source delivering regulated voltage with minimal quiescent current draw. Use Value: 20 µA leakage at 1 V reverse bias reduces standby current by >50% versus standard 3.3 V Zeners, extending 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C2V7-Q | ±5% tolerance (2.5 V–2.9 V range) vs. ±2% (2.65 V–2.75 V); identical package, power, and thermal specs | Acceptable where system-level calibration compensates for wider VZ spread; not suitable for closed-loop feedback without margin | Select when cost sensitivity outweighs precision requirement and board-level trimming is available |
| MMSZ4678T1G | 2.7 V nominal, ±5%, SOD-123 package (larger footprint), 500 mW Ptot, 300 Ω rdif at 20 mA | Higher power and larger size suit industrial mains-connected designs; not AEC-Q101 qualified | Choose only for non-automotive applications needing higher surge margin or legacy SOD-123 compatibility |
Compared with BZX84W-C2V7-Q, the BZX84W-B2V7-Q offers tighter regulation critical for analog feedback stability; versus MMSZ4678T1G, it delivers automotive qualification and smaller footprint at the expense of absolute power headroom.
Availability
BZX84W-B2V7-Q is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port protection, and industrial PLC input protection requiring stable component supply across production lifecycles.
Supply support for BZX84W-B2V7-Q 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.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage reference and clamping in harsh-environment automotive electronics.
FAQ
What is the maximum continuous reverse current the BZX84W-B2V7-Q can sustain at 25 °C?
The device does not specify a maximum continuous reverse current; instead, its safe operating limit is defined by total power dissipation. At 25 °C ambient on a standard FR4 PCB, it sustains up to 275 mW, corresponding to approximately 102 mA at 2.7 V (P = V × I). Exceeding this causes junction temperature rise beyond 150 °C.
Can BZX84W-B2V7-Q be used in place of a 2.7 V TL431-based shunt regulator?
No - the BZX84W-B2V7-Q is a passive two-terminal Zener diode, lacking the active error amplifier, reference, and adjustable output of the TL431. It provides fixed 2.7 V regulation only under defined current conditions and cannot drive loads or maintain regulation across wide current ranges like the TL431.
Is the n.c. pin (Pin 2) electrically isolated or internally bonded?
Pin 2 is confirmed as not connected (n.c.) - it has no internal bond wire or die connection. The datasheet explicitly states "not connected" in Table 2, and the SOT323 outline drawing shows no internal routing to Terminal 2. It must remain unconnected on PCB layout.
How does the −2.0 mV/K temperature coefficient affect long-term voltage stability in automotive environments?
At 5 mA, the coefficient means VZ decreases by 2.0 mV per Kelvin rise. Over a −40 °C to +125 °C range (165 K ΔT), total drift is −330 mV - but since nominal VZ is 2.7 V, this represents ~12.2% relative change. System design must accommodate this via compensation or operating-point selection within narrower ambient bands.
BZX84W-B2V7-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):
- 2.7 V
- Tolerance:
- ±1.85%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 20 µA @ 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:
- SOT-323
BZX84W-B2V7-QX FAQ
1.How can I place an order for BZX84W-B2V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B2V7-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-B2V7-QX reliable?
The price and inventory of BZX84W-B2V7-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-B2V7-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-B2V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B2V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B2V7-QX?
BZX84W-B2V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B2V7-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-B2V7-QX?
For technical support, including BZX84W-B2V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B2V7-QX requirements.
6.How does Aetrix verify that BZX84W-B2V7-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-B2V7-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-B2V7-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-B2V7-QX?
All BZX84W-B2V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B2V7-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-B2V7-QX part is unused and in its original packaging.
Return procedure for BZX84W-B2V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B2V7-QX Tags
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