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Nexperia USA Inc. BZX84W-B11F
- Part No.:
- BZX84W-B11F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B11F.pdf
- Description:
- DIODE ZENER 11V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,836
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Product details
Overview
BZX84W-B11F from Nexperia is a ±2 % tolerance Zener voltage regulator diode with a nominal 11 V breakdown voltage, 150 Ω differential resistance at 5 mA, and 7.4 mV/K temperature coefficient, housed in a SOT323 (SC-70) package for space-constrained power rail stabilization in portable electronics.
For engineers reviewing the BZX84W-B11F datasheet, BZX84W-B11F pinout, BZX84W-B11F application, or BZX84W-B11F equivalent, this device serves as a precision low-power voltage reference in analog sensor biasing, ADC reference shunt regulation, and overvoltage clamp circuits where thermal stability and small-footprint SMD placement are critical.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain stable 11 V across its terminals under regulated current conditions (IZ = 5 mA). Its ±2 % tolerance ensures tight voltage control versus standard ±5 % variants, and its 7.4 mV/K positive temperature coefficient compensates for ambient drift in mid-range voltage references.
The device exhibits 150 Ω differential resistance at 5 mA, enabling predictable dynamic response to load transients, and supports non-repetitive surge currents up to 1.0 A (tp = 100 µs), making it suitable for transient suppression in low-energy signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.0 V nominal, ±2 % tolerance (10.8–11.2 V range at IZ = 5 mA) |
| Differential Resistance (rdif) | 150 Ω max at IZ = 5 mA - defines output impedance and voltage deviation under current change |
| Temperature Coefficient (SZ) | +7.4 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius rise in junction temperature |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - enables low-loss forward conduction during polarity-reversal protection |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous DC power handling in standard layout |
| Reverse Current (IR) | 100 nA max at VR = 8 V - ensures minimal leakage in high-impedance reference nodes |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in extended industrial environments |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals, optimized for automated reflow assembly and high-density PCB layouts.
| 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 isolated terminal - must remain unconnected in PCB layout to avoid parasitic coupling |
| 3 | Cathode (K) | Reverse-bias terminal; tied to regulated output node and current-limiting resistor in shunt topology |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation than ±5 % variants, reducing need for post-calibration in precision analog stages |
| 150 Ω differential resistance at 5 mA | Minimizes output voltage shift under ±1 mA load variation - critical for stable ADC reference shunts |
| +7.4 mV/K temperature coefficient | Provides predictable, linear VZ drift with temperature - simplifies compensation in wide-temperature designs |
| 275 mW power rating on FR4 | Supports continuous 25 mA regulation current at 11 V without heatsinking in standard PCB layouts |
Applications
| ADC Reference Shunt Regulator | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Stabilizing the reference voltage input of a 12-bit SAR ADC in battery-powered IoT node. IC Role / Device Role / Timing Role: Zener shunt regulator providing fixed 11 V reference to ADC REF+ pin via series resistor. Use Value: ±2 % tolerance and 150 Ω rdif ensure <±1 LSB reference error across 0–70 °C, eliminating external trimming. |
Use Scenario: Supplying stable bias voltage to a silicon photodiode amplifier in optical smoke detector. IC Role / Device Role / Timing Role: Reverse-biased Zener establishing fixed 11 V cathode potential for photodiode reverse bias. Use Value: 100 nA IR at 8 V prevents signal leakage path degradation, preserving picoamp-level photocurrent accuracy. |
| Overvoltage Clamp for GPIO | Power Rail Stabilizer in Wearables |
Use Scenario: Protecting 3.3 V microcontroller GPIO from accidental 12 V misconnection in modular sensor interface. IC Role / Device Role / Timing Role: Cathode tied to GPIO line, anode to ground - clamps excursions above 11 V + VF. Use Value: 1.0 A non-repetitive surge rating (tp = 100 µs) absorbs ESD-like transients without failure. |
Use Scenario: Maintaining stable 11 V supply for RF front-end LNA in compact Bluetooth earbud design. IC Role / Device Role / Timing Role: Shunt regulator parallel to LNA VCC, sinking excess current from boost converter. Use Value: SOT323 footprint (2.2 × 1.35 mm) fits within 3 mm² board area constraint while delivering 275 mW thermal margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5242B | 11 V ±5 % tolerance, 220 Ω rdif at 20 mA, −2 mV/K SZ | Higher tolerance and negative TC limit use in precision references; better suited for general-purpose clamping | Select when cost sensitivity outweighs voltage accuracy and thermal drift requirements |
| Vishay BZX84-C11 | 11 V ±5 % tolerance, 150 Ω rdif at 5 mA, +7.4 mV/K SZ | Identical rdif and TC but looser tolerance - requires additional calibration in metrology-grade circuits | Choose for legacy compatibility where ±5 % regulation is acceptable and sourcing flexibility is prioritized |
Compared with MMBZ5242B and BZX84-C11, BZX84W-B11F delivers superior voltage accuracy and matching TC for temperature-stable references, while its SOT323 package offers smaller footprint than TO-236AB alternatives used by both competitors.
Availability
BZX84W-B11F is available at Aetrix Electronics and suitable for ADC reference shunt regulation, low-power sensor biasing, and overvoltage clamp circuits requiring stable component supply, consistent parametric performance, and long-term obsolescence resilience.
Supply support for BZX84W-B11F 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-volume, high-reliability discrete and logic devices, with manufacturing rooted in process optimization and automotive-grade quality systems.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, thermally robust voltage regulation in consumer, industrial, and communications equipment where SMT scalability and parametric consistency are essential.
FAQ
What is the maximum continuous reverse current for stable 11 V regulation?
The BZX84W-B11F achieves stable regulation at IZ = 5 mA, with maximum continuous reverse current limited by power dissipation: at 11 V, Imax = Ptot / VZ = 275 mW / 11 V ≈ 25 mA. Operation beyond this risks exceeding 150 °C junction temperature on standard FR4 PCB.
Can Pin 2 (n.c.) be grounded or left floating in layout?
Pin 2 is internally not connected and must remain unconnected in the PCB layout - neither grounded nor routed. Connecting it may introduce parasitic capacitance or leakage paths that degrade reverse leakage (IR) and noise performance in sensitive reference applications.
How does the +7.4 mV/K temperature coefficient affect long-term reference stability?
The +7.4 mV/K coefficient causes VZ to increase by ~0.81 V over a 110 °C junction range (25 °C to 135 °C), resulting in ~7.4 % total drift. For sub-1 % stability, active compensation or narrow ambient operating range (e.g., 0–40 °C) is required.
Is BZX84W-B11F suitable for automotive applications?
No. Per Nexperia's revision history (Rev. 2, Jan 2023), the BZX84W series is explicitly non-automotive qualified. It lacks AEC-Q200 stress testing and automotive-grade qualification; use BZX84W-Q series or automotive-qualified alternatives for vehicle systems.
BZX84W-B11F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±2%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B11F FAQ
1.How can I place an order for BZX84W-B11F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B11F 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-B11F reliable?
The price and inventory of BZX84W-B11F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B11F is usually 5 days.
3.What payment methods are accepted for BZX84W-B11F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B11F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B11F?
BZX84W-B11F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B11F 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-B11F?
For technical support, including BZX84W-B11F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B11F requirements.
6.How does Aetrix verify that BZX84W-B11F is sourced from the original manufacturer or authorized distributors?
All BZX84W-B11F 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-B11F meets industry standards.
7.What is the process for return or replacement of BZX84W-B11F?
All BZX84W-B11F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B11F, 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-B11F part is unused and in its original packaging.
Return procedure for BZX84W-B11F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B11F Tags
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MM5Z5V1ST1G
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