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Nexperia USA Inc. BZX8450-B11-QR
- Part No.:
- BZX8450-B11-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B11-QR.pdf
- Description:
- DIODE ZENER 11V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,138
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Product details
Overview
BZX8450-B11-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in automotive and portable electronics. It delivers 11 V nominal regulation at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification.
For engineers reviewing the BZX8450-B11-QR datasheet, BZX8450-B11-QR pinout, BZX8450-B11-QR application, or BZX8450-B11-QR equivalent, this page provides verified electrical characteristics, thermal behavior, automotive-grade reliability data, and real-world use context for low-power voltage stabilization circuits.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse breakdown voltage across its cathode-anode terminals under controlled current conditions. Its specified 11 V nominal Zener voltage (B-series ±2 %) is characterized at IZ = 50 µA, enabling ultra-low-bias operation ideal for battery-powered systems.
It features intentional minor leakage current optimization per AN90031 to improve switching speed and reduce noise-distinct from standard Zeners-and exhibits a positive temperature coefficient of +5.4 mV/K at 11 V, supporting predictable thermal drift compensation in analog references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 11 V at IZ = 50 µA; enables precise low-current reference generation without excessive quiescent draw |
| Voltage Tolerance | ±2 % (B-series); ensures tight regulation for critical analog sensing and ADC reference paths |
| Max Power Dissipation | 250 mW at Tamb ≤ 25 °C on FR4 PCB; defines safe continuous operating envelope in compact layouts |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA; supports reliable forward conduction for polarity protection or clamping |
| Reverse Current @ VR = 8.4 V | ≤ 0.05 µA; guarantees minimal leakage in high-impedance bias networks |
| Differential Resistance | 150 Ω max at IZ = 5 mA; determines regulation stiffness and output impedance in feedback loops |
| Junction Temperature Limit | 150 °C; sets maximum thermal operating ceiling for under-hood automotive environments |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, single-sided FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation; carries full load current when active |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder joint required |
| 3 | Cathode (K) | Connected to higher-potential node; serves as regulated output reference point; thermally coupled to solder point (Rth(j-sp) = 330 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Low test current operation | Specified at 50 µA-enables regulation in microamp-level bias chains for ultra-low-power IoT sensors |
| Optimized leakage profile | Intentional minor rise per AN90031 improves transient response and reduces broadband noise in reference rails |
| Thermal resistance | Rth(j-a) = 500 K/W (free air); supports thermal-aware layout in space-constrained modules |
| Stable temperature coefficient | +5.4 mV/K at 11 V; allows predictable drift modeling in temperature-compensated voltage references |
Applications
| Automotive Cabin Control | Portable Medical Sensor Bias |
|---|---|
Use Scenario: Voltage reference for cabin temperature sensor signal conditioning in HVAC control units. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 11 V rail for op-amp excitation and ADC reference divider. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure long-term accuracy and functional safety compliance over -40 °C to +125 °C ambient. |
Use Scenario: Low-current bias supply for MEMS pressure transducer front-end in handheld blood pressure monitors. IC Role / Device Role / Timing Role: Precision voltage clamp regulating sensor excitation current source at 50 µA test point. Use Value: Ultra-low leakage (<0.05 µA at 8.4 V) prevents loading of high-impedance sensor outputs and preserves measurement fidelity. |
| Industrial PLC Input Protection | Smart Meter Reference Stabilization |
Use Scenario: Overvoltage clamp on 24 V DC input channel of programmable logic controller I/O module. IC Role / Device Role / Timing Role: Transient-suppressing shunt regulator limiting input rail to 11 V during ESD or surge events. Use Value: 250 mW power rating and fast-switching optimized leakage enable robust clamping without thermal runaway in unventilated enclosures. |
Use Scenario: Secondary reference stabilizer for metrology-grade voltage reference IC in utility smart meters. IC Role / Device Role / Timing Role: Low-noise auxiliary Zener buffer isolating primary bandgap reference from load variations. Use Value: Optimized leakage profile per AN90031 reduces broadband noise coupling into precision ADC sampling clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C11-Q | ±5 % tolerance; higher leakage; no AN90031 optimization | Acceptable for non-critical industrial biasing where cost outweighs precision | Select only if ±5 % regulation error and higher noise are acceptable in the target circuit |
| MMSZ5240B-TP | Same 11 V nominal, ±5 %, 500 mW rating, SOD-123 package | Larger footprint and higher thermal resistance limit use in ultra-dense automotive PCBs | Choose when higher power margin is needed and board space permits larger package |
Compared with BZX8450-B11-QR, the BZX84-C11-Q trades precision and noise performance for cost, while MMSZ5240B-TP offers greater power headroom at the expense of thermal efficiency and board area-making the BZX8450-B11-QR optimal for AEC-Q101-compliant, space-constrained, low-noise 11 V reference designs.
Availability
BZX8450-B11-QR is available at Aetrix Electronics and suitable for automotive cabin control, portable medical sensor bias, and industrial PLC input protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-B11-QR 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for low-current, low-noise voltage reference and biasing in automotive, portable, and industrial systems where precision and reliability are critical.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-B11-QR?
The nominal Zener voltage is 11 V with ±2 % tolerance, meaning guaranteed breakdown occurs between 10.78 V and 11.22 V at IZ = 50 µA. The absolute maximum non-repetitive peak reverse voltage is not specified; operation above 11.22 V risks exceeding rated power or thermal limits unless current is strictly limited by external series resistance.
Can BZX8450-B11-QR be used in place of a standard 1N4740A?
No-it is not a drop-in replacement. The 1N4740A is a 10 W, 11 V, DO-41 through-hole Zener with ±5 % tolerance and different thermal characteristics. BZX8450-B11-QR is a 250 mW, SOT23 surface-mount device with ±2 % tolerance, AEC-Q101 qualification, and optimized low-current behavior-requiring revised PCB layout, current-limiting design, and thermal validation.
Does the 'QR' suffix indicate tape-and-reel packaging?
Yes. Per Nexperia ordering conventions, the 'QR' suffix denotes 3000-piece tape-and-reel packaging in SOT23 format, compatible with automated pick-and-place assembly. This differs from 'Q' (bulk) or 'QA' (ammo pack) variants and ensures consistent feeding in high-speed SMT lines.
How does the 'n.c.' pin affect PCB layout and thermal performance?
Pin 2 is internally unconnected and must remain electrically isolated-no trace, pad, or solder should contact it. Leaving it unconnected avoids parasitic capacitance and maintains specified Rth(j-sp) = 330 K/W via the cathode tab. Bridging or routing to this pin degrades thermal performance and may cause premature failure under sustained power dissipation.
BZX8450-B11-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450-Q
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-B11-QR FAQ
1.How can I place an order for BZX8450-B11-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B11-QR 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-B11-QR reliable?
The price and inventory of BZX8450-B11-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B11-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-B11-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B11-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B11-QR?
BZX8450-B11-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B11-QR 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-B11-QR?
For technical support, including BZX8450-B11-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B11-QR requirements.
6.How does Aetrix verify that BZX8450-B11-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-B11-QR 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-B11-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-B11-QR?
All BZX8450-B11-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B11-QR, 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-B11-QR part is unused and in its original packaging.
Return procedure for BZX8450-B11-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B11-QR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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