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Nexperia USA Inc. BZX84W-B11-QF
- Part No.:
- BZX84W-B11-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B11-QF.pdf
- Description:
- DIODE ZENER 11V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,038
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Product details
Overview
BZX84W-B11-QF from Nexperia is a ±2% tolerance Zener diode in SOT323 (SC-70) package, rated for 11 V nominal regulation voltage at 5 mA, with 150 Ω typical differential resistance and 7.4 mV/K temperature coefficient. It delivers 275 mW total power dissipation on FR4 PCB and supports automotive-grade voltage reference and overvoltage protection in compact DC-DC feedback loops.
For engineers reviewing the BZX84W-B11-QF datasheet, BZX84W-B11-QF pinout, BZX84W-B11-QF application, or BZX84W-B11-QF equivalent, this page provides verified Zener parameters, AEC-Q101 qualification status, thermal resistance (455 K/W), reverse leakage (100 nA at 8 V), and SOT323 terminal mapping to support precision biasing and ESD-tolerant clamp design.
Technical Context
This Zener operates in reverse breakdown with tightly controlled 10.8–11.2 V tolerance at IZ = 5 mA, enabling stable reference generation under varying load and temperature. Its low 150 Ω dynamic impedance ensures minimal output voltage shift across current changes from 1 mA to 20 mA.
The device exhibits a +7.4 mV/K positive temperature coefficient near 11 V, making it suitable for temperature-compensated references when paired with negative-coefficient components. It is qualified per AEC-Q101 and rated for operation from −55 °C to +150 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 11 V at IZ = 5 mA - defines precise regulation point for feedback networks |
| Tolerance | ±2 % - enables high-accuracy voltage reference without trimming |
| Differential Resistance | 150 Ω max at IZ = 5 mA - limits output voltage variation under load transients |
| Reverse Leakage Current | 100 nA max at VR = 8 V - ensures low quiescent power in standby circuits |
| Total Power Dissipation | 275 mW on FR4 PCB - sets maximum continuous power handling in standard layout |
| Thermal Resistance | 455 K/W junction-to-ambient - determines temperature rise under steady-state bias |
| Forward Voltage | 0.9 V max at IF = 10 mA - defines anode-cathode drop during forward conduction |
| Junction Temperature | 150 °C max - defines upper thermal limit for reliable long-term operation |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads; leadless construction optimized for high-density PCB assembly and reflow compatibility.
| 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.) | Electrically isolated pad; no internal connection - must remain unconnected in layout |
| 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 qualification | Validated for automotive applications including engine control units and body electronics |
| ±2 % voltage tolerance | Reduces need for post-production calibration in precision analog circuits |
| Low 100 nA leakage at 8 V | Minimizes standby current in battery-powered voltage monitor circuits |
| 150 °C maximum junction temperature | Supports operation in under-hood environments without derating below 125 °C ambient |
| SOT323 footprint compatibility | Enables drop-in replacement in space-constrained designs using industry-standard SC-70 land patterns |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Provides stable 11 V reference for microcontroller ADC biasing and op-amp level-shifting in engine management systems. IC Role / Device Role / Timing Role: Zener voltage reference element in analog front-end circuitry, directly setting reference potential for signal chain accuracy. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure consistent measurement accuracy across temperature and lifetime in harsh under-hood conditions. |
Use Scenario: Stabilizes excitation voltage for resistive bridge sensors (e.g., pressure, strain) in factory automation equipment. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant bias voltage despite supply ripple or load variation. Use Value: 150 Ω differential resistance minimizes output drift during sensor current draw changes, preserving measurement linearity. |
| USB-C Power Delivery Clamp | IoT Node Overvoltage Protection |
Use Scenario: Clamps transient overvoltage on USB-C CC lines during hot-plug events to protect Type-C controller ICs. IC Role / Device Role / Timing Role: Fast-reacting shunt protection device absorbing surge energy before downstream logic is stressed. Use Value: 40 W non-repetitive peak power rating (100 µs pulse) handles ESD-like transients without failure. |
Use Scenario: Guards 3.3 V rail in battery-powered edge nodes against accidental 5 V insertion or charger misconnection. IC Role / Device Role / Timing Role: Standby-mode overvoltage limiter sinking excess current when input exceeds safe threshold. Use Value: 100 nA reverse leakage at 8 V ensures negligible battery drain during multi-year deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C11-Q | ±5 % tolerance (vs. ±2 %); otherwise identical package, power rating, and thermal specs | Acceptable where reference accuracy < ±5 % suffices; lower cost tier | Select when tighter regulation is unnecessary and BOM cost optimization is prioritized |
| MMSZ4689-TP | 11 V nominal, ±5 %, SOD-123 package, 500 mW Ptot, higher 350 Ω rdif | Higher power but larger footprint and looser regulation; not AEC-Q101 qualified | Choose only if board space allows SOD-123 and automotive qualification is not required |
Compared with BZX84W-C11-Q, the BZX84W-B11-QF offers twice the voltage accuracy at same footprint and qualification level; versus MMSZ4689-TP, it trades 225 mW lower power for AEC-Q101 compliance, 2.3× lower dynamic impedance, and 35 % smaller area-critical for automotive and space-constrained IoT designs.
Availability
BZX84W-B11-QF is available at Aetrix Electronics and suitable for automotive ECU reference design, industrial sensor signal conditioning, and IoT overvoltage protection requiring stable component supply across production lifecycles.
Supply support for BZX84W-B11-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 focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for robust voltage regulation and clamping in automotive electronics and high-reliability industrial systems.
FAQ
What is the maximum reverse voltage this Zener can regulate stably?
The BZX84W-B11-QF is specified for stable Zener operation at 11 V nominal with ±2 % tolerance (10.8–11.2 V range) at 5 mA test current. Its absolute maximum reverse voltage is limited by the 150 °C junction temperature rating and 275 mW power dissipation; sustained operation above 11.2 V requires derating based on thermal resistance (455 K/W) and ambient conditions.
Is pin 2 electrically functional or a dummy pad?
Pin 2 is explicitly marked "n.c." (not connected) in Nexperia's official pinning diagram and has no internal semiconductor connection. It must remain unconnected in PCB layout and soldering-neither grounded nor tied to any net-to avoid unintended parasitic coupling or mechanical stress on the die attach.
How does its temperature coefficient affect regulation stability?
With a +7.4 mV/K temperature coefficient at 11 V, the BZX84W-B11-QF's Zener voltage increases by approximately 7.4 mV per degree Celsius rise in junction temperature. This positive drift must be accounted for in wide-temperature-range applications; pairing with a negative-coefficient component (e.g., forward-biased diode) enables compensated reference designs.
Can it replace older BZX84C11 in existing SOT23 designs?
No-BZX84W-B11-QF uses SOT323 (SC-70), which is physically smaller than SOT23 and incompatible with SOT23 footprints. While both regulate ~11 V, the SOT323 package requires redesigned PCB land patterns, stencil apertures, and reflow profiles; direct substitution would cause solder joint reliability issues and assembly yield loss.
BZX84W-B11-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):
- 11 V
- Tolerance:
- ±1.82%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 20 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:
- SOT-323
BZX84W-B11-QF FAQ
1.How can I place an order for BZX84W-B11-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B11-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-B11-QF reliable?
The price and inventory of BZX84W-B11-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-B11-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-B11-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B11-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B11-QF?
BZX84W-B11-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B11-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-B11-QF?
For technical support, including BZX84W-B11-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B11-QF requirements.
6.How does Aetrix verify that BZX84W-B11-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-B11-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-B11-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-B11-QF?
All BZX84W-B11-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B11-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-B11-QF part is unused and in its original packaging.
Return procedure for BZX84W-B11-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B11-QF Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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