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Nexperia USA Inc. BZX8450-B11R
- Part No.:
- BZX8450-B11R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B11R.pdf
- Description:
- DIODE ZENER 11V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,409
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Product details
Overview
BZX8450-B11R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, providing 11 V nominal regulation at 50 µA test current with ±2 % tolerance, 150 Ω typical differential resistance at 5 mA, and 9.0 pF capacitance at 0 V - deployed for precision biasing and reference in portable battery-powered sensor nodes and low-power microcontroller reset circuits.
For engineers reviewing the BZX8450-B11R datasheet, BZX8450-B11R pinout, BZX8450-B11R application, or BZX8450-B11R equivalent, this page delivers verified electrical parameters, thermal behavior, SOT23 terminal mapping, and substitution guidance for low-current voltage reference design.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse breakdown voltage across its cathode–anode terminals under controlled bias conditions. Its specified 11 V nominal Zener voltage is guaranteed at IZ = 50 µA, with temperature coefficient of +5.4 mV/K and leakage current ≤0.05 µA at VR = 8.4 V.
The BZX8450-B11R features intentional minor leakage optimization per AN90031 for fast switching and noise reduction, distinguishing it from standard Zeners. It exhibits 150 Ω dynamic impedance at 5 mA and 250 mW total power dissipation on FR4 PCB with single-sided copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.0 V nominal at IZ = 50 µA; ±2 % tolerance ensures tight reference accuracy for analog sensing and ADC reference rails. |
| Differential Resistance (rdiff) | 150 Ω max at IZ = 5 mA; low impedance stabilizes output against load transients in low-power LDO pre-bias networks. |
| Reverse Leakage (IR) | ≤0.05 µA at VR = 8.4 V; ultra-low standby current preserves battery life in always-on IoT endpoints. |
| Capacitance (Cd) | 9.0 pF at f = 1 MHz, VR = 0 V; minimal parasitic capacitance avoids signal integrity degradation in high-frequency reference paths. |
| Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB; defines maximum continuous bias power without derating in compact SMT layouts. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; enables use as low-drop rectifier or clamping diode in dual-role protection circuits. |
| Junction Temperature (Tj) | 150 °C absolute max; supports operation in industrial ambient environments up to +125 °C with appropriate thermal layout. |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration with exposed cathode tab for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Positive terminal during forward conduction; connected to ground or lower-potential node in shunt regulation topology. |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress. |
| 3 | Cathode (K) | Regulated output node in reverse-bias mode; soldered to power rail requiring stabilized voltage reference. |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables stable reference generation from microamp-level bias sources in energy-harvesting systems. |
| Optimized leakage profile | Intentional minor rise per AN90031 reduces switching noise and improves transient response in feedback loops. |
| ±2 % voltage tolerance | Tighter than standard ±5 % series - reduces calibration overhead in precision analog front-ends and sensor excitation circuits. |
| Thermal resistance (j-a) | 500 K/W in free air - allows accurate junction temperature estimation for reliability modeling in sealed enclosures. |
| FR4-compatible footprint | Standard SOT23 land pattern supports reflow and wave soldering per Figures 10–11 - simplifies manufacturing integration. |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Providing stable 11 V reference to op-amp bias networks in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply to analog signal conditioning stage. Use Value: Ultra-low 0.05 µA leakage extends coin-cell lifetime beyond 5 years while maintaining ±2 % reference stability over −40 °C to +85 °C. |
Use Scenario: Generating precise reset threshold for 3.3 V microcontrollers using resistor divider from 11 V Zener output. IC Role / Device Role / Timing Role: Precision voltage reference defining brown-out detection level. Use Value: 150 Ω dynamic impedance ensures <10 mV deviation under 100 µA load variation, eliminating false resets during RF transmission bursts. |
| Low-Power ADC Reference | Signal Clamping Interface |
|
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in wearable health monitors. IC Role / Device Role / Timing Role: Low-noise DC reference source for analog-to-digital conversion accuracy. Use Value: 9.0 pF capacitance minimizes high-frequency coupling into reference input, preserving ENOB > 11.2 bits at 1 MSPS sampling. |
Use Scenario: Protecting GPIO pins from ESD-induced overvoltage in USB-C peripheral interfaces. IC Role / Device Role / Timing Role: Bidirectional clamp using forward conduction (0.9 V) and reverse breakdown (11 V). Use Value: Dual-mode operation enables 0.9 V forward clamping and 11 V reverse clamping without external components, reducing BOM count by one discrete. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240BS-7-F | 10 V nominal, ±5 % tolerance, 170 Ω rdiff, 200 mW Ptot | Looser voltage accuracy and higher dynamic impedance limit use in high-precision references. | Select when cost sensitivity outweighs reference stability requirements and 10 V suffices. |
| BZX84-C11 | 11 V nominal, ±5 % tolerance, 150 Ω rdiff, same SOT23 package | Higher leakage (≤0.1 µA) and no AN90031 leakage optimization compromises noise performance. | Choose only if ±5 % tolerance is acceptable and ultra-low-noise operation is not required. |
Compared with BZX8450-B11R, MMBZ5240BS-7-F trades 1 V lower regulation and ±5 % tolerance for broader availability, while BZX84-C11 matches voltage but sacrifices leakage control and accuracy - making BZX8450-B11R optimal for battery-sensitive, noise-critical 11 V reference designs.
Availability
BZX8450-B11R is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and low-power ADC reference requiring stable component supply across extended temperature ranges and long-life deployments.
Supply support for BZX8450-B11R 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 BZX8450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-constrained and noise-sensitive applications.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-B11R?
The BZX8450-B11R has a nominal Zener voltage of 11.0 V at 50 µA test current, with guaranteed minimum and maximum values of 10.80 V and 11.20 V respectively. Breakdown occurs within this range under specified test conditions; operation above 11.20 V risks exceeding absolute maximum ratings.
Can BZX8450-B11R be used in forward conduction mode?
Yes - its forward voltage is rated at ≤0.9 V at 10 mA, enabling use as a low-drop rectifier or clamping diode. However, its primary design intent is reverse-bias regulation; forward characteristics are secondary and not optimized for high-current switching.
How does the "B" suffix differ from "C" in the BZX8450 series?
The "B" suffix denotes ±2 % voltage tolerance, while "C" indicates approximately ±5 %. Both share identical package, pinout, and thermal specs, but "B" parts provide tighter regulation critical for precision analog functions where calibration headroom is limited.
Is BZX8450-B11R suitable for automotive applications?
No - this device is not AEC-Q200 qualified and lacks automotive-grade qualification, testing, or warranty. Nexperia explicitly states non-automotive qualification in its legal disclaimers; use in automotive systems requires formal validation and carries full customer liability.
BZX8450-B11R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 8.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-B11R FAQ
1.How can I place an order for BZX8450-B11R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B11R 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 BZX8450-B11R reliable?
The price and inventory of BZX8450-B11R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B11R is usually 5 days.
3.What payment methods are accepted for BZX8450-B11R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B11R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B11R?
BZX8450-B11R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B11R 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 BZX8450-B11R?
For technical support, including BZX8450-B11R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B11R requirements.
6.How does Aetrix verify that BZX8450-B11R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B11R 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 BZX8450-B11R meets industry standards.
7.What is the process for return or replacement of BZX8450-B11R?
All BZX8450-B11R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B11R, 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 BZX8450-B11R part is unused and in its original packaging.
Return procedure for BZX8450-B11R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B11R Tags
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MM5Z5V1ST1G
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