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Nexperia USA Inc. BZX8450-B3V0-QR
- Part No.:
- BZX8450-B3V0-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B3V0-QR.pdf
- Description:
- DIODE ZENER 3V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,970
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Product details
Overview
BZX8450-B3V0-Q from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in low-power circuits. It delivers a nominal 3.0 V regulation at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and 0.8 µA max reverse leakage at VR = 2.4 V - optimized for battery-powered sensor nodes and automotive microcontroller reset circuits.
For engineers reviewing the BZX8450-B3V0-Q datasheet, BZX8450-B3V0-Q pinout, BZX8450-B3V0-Q application, or BZX8450-B3V0-Q equivalent, this device serves as a qualified AEC-Q101 Zener for stable low-current regulation where low test current, tight tolerance, and thermal robustness are critical selection criteria.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.94 V to 3.06 V at IZ = 50 µA, exhibiting a differential resistance ≤600 Ω at 5 mA and a temperature coefficient of −3.5 mV/K. Its low 50 µA test current enables minimal quiescent current draw in always-on monitoring circuits.
The device features intentional minor leakage optimization per AN90031 for fast switching and noise reduction, and is qualified to AEC-Q101 for automotive under-hood and infotainment supply rail stabilization. Thermal resistance from junction to ambient is 500 K/W on standard FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V (2.94 V to 3.06 V at IZ = 50 µA; enables precise low-voltage reference in 3.3 V systems) |
| Tolerance | ±2 % (B-series grade; ensures predictable regulation without post-calibration in production) |
| Test Current | 50 µA (ultra-low bias requirement; extends battery life in portable IoT sensors) |
| Max Power Dissipation | 250 mW (at Tamb ≤ 25 °C on FR4 PCB; supports continuous operation in compact automotive modules) |
| Reverse Leakage | 0.8 µA max at VR = 2.4 V (low standby loss; critical for energy harvesting and wake-up circuit integrity) |
| Forward Voltage | 0.9 V max at IF = 10 mA (ensures predictable forward conduction during transient overvoltage clamping) |
| Junction Temperature | −55 °C to +150 °C (AEC-Q101 qualified; suitable for engine control unit and ADAS ECU environments) |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation; requires current-limiting resistor in series |
| 2 | Not Connected (n.c.) | Electrically isolated internal terminal; no PCB trace or solder connection required |
| 3 | Cathode (K) | Connected to higher-potential node; defines regulated output voltage referenced to ground or supply rail |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including powertrain and body electronics per stress test requirements |
| Low 50 µA test current | Enables regulation in micropower circuits where supply current must stay below 100 µA |
| ±2 % voltage tolerance (B-series) | Reduces need for external trimming in factory calibration of analog sensor signal chains |
| Optimized leakage profile | Minor intentional IR increase improves switching speed and reduces broadband noise in feedback paths |
| SOT23 footprint compatibility | Direct drop-in replacement for legacy Zeners (e.g., BZX84-C3V0) without PCB redesign |
Applications
| Automotive Microcontroller Reset Circuit | Portable Gas Sensor Bias Supply |
|---|---|
Use Scenario: Providing stable 3.0 V reference to enable/disable reset logic in engine control units during cold cranking. IC Role / Device Role / Timing Role: Zener voltage reference establishing threshold for reset supervisor IC activation. Use Value: Tight ±2 % tolerance ensures reliable reset assertion across −40 °C to +125 °C ambient without drift-induced false triggers. |
Use Scenario: Biasing electrochemical gas sensing elements in handheld air quality monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current voltage regulator supplying fixed bias to sensor anode while minimizing standby drain. Use Value: 50 µA test current and sub-µA leakage preserve >10-year battery life in always-on detection mode. |
| Industrial PLC Analog Input Protection | Medical Wearable Signal Conditioning |
Use Scenario: Clamping and regulating input stage of 4–20 mA loop receiver to prevent overvoltage damage during field wiring faults. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as shunt regulator and transient limiter at signal entry point. Use Value: 250 mW power rating and 150 °C junction rating sustain fault conditions without thermal runaway in unventilated enclosures. |
Use Scenario: Generating stable reference for ADC front-end in ECG patch devices operating from rechargeable Li-ion cells. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric measurement against sensor bridge outputs. Use Value: −3.5 mV/K temperature coefficient minimizes offset drift across body-temperature range (32–42 °C). |
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-C3V0 | ±5 % tolerance, 3.0 V nominal, same SOT23 package, non-AEC-Q101 rated | Lacks automotive qualification; higher voltage spread increases risk of marginal reset behavior in wide-temp designs | Select when cost sensitivity outweighs AEC compliance and tighter tolerance is unnecessary |
| MMSZ4683T1G | 3.0 V nominal, ±5 %, 500 mW Ptot, SOD-123 package, AEC-Q101 qualified | Larger footprint and higher power rating suit higher-current applications but require PCB layout change | Choose when board space allows larger package and system demands >250 mW surge handling |
Compared with BZX8450-B3V0-Q, BZX84-C3V0 trades AEC-Q101 compliance and ±2 % precision for lower cost, while MMSZ4683T1G offers higher power margin at the expense of SOT23 compatibility and increased board area.
Availability
BZX8450-B3V0-Q is available at Aetrix Electronics and suitable for automotive ECUs, portable medical sensors, industrial PLC analog inputs, and battery-powered IoT edge nodes requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8450-B3V0-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 BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage reference and regulation in harsh-environment automotive and industrial control systems.
FAQ
What is the maximum reverse current at 2.4 V for BZX8450-B3V0-Q?
The maximum reverse current (IR) at VR = 2.4 V is 0.8 µA, measured at Tj = 25 °C. This ultra-low leakage ensures minimal power loss in always-on circuits and preserves battery life in portable applications where standby current is tightly constrained.
Is BZX8450-B3V0-Q compatible with lead-free reflow soldering processes?
Yes - BZX8450-B3V0-Q is qualified for lead-free reflow soldering per JEDEC J-STD-020. The SOT23 package supports peak reflow temperatures up to 260 °C, and Nexperia provides detailed footprint recommendations (Fig. 10) for optimal thermal transfer and solder joint reliability.
How does the −3.5 mV/K temperature coefficient affect regulation accuracy over temperature?
At a nominal 3.0 V Zener voltage, the −3.5 mV/K coefficient results in approximately −10.5 mV shift over a 30 K rise (e.g., 25 °C to 55 °C), or ±0.35 % full-scale drift. This is fully characterized in Table 8 and remains within specification for most automotive and industrial reference applications.
Can BZX8450-B3V0-Q be used in place of a 3.3 V Zener for MCU I/O protection?
No - BZX8450-B3V0-Q is rated for 3.0 V nominal regulation and is not intended for I/O clamping above its Zener voltage. For 3.3 V rail protection, use a TVS diode like PESD5V0S1BA with appropriate breakdown voltage and clamping performance, not a low-current Zener.
BZX8450-B3V0-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):
- 3 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 800 nA @ 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:
- TO-236AB
BZX8450-B3V0-QR FAQ
1.How can I place an order for BZX8450-B3V0-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B3V0-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-B3V0-QR reliable?
The price and inventory of BZX8450-B3V0-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-B3V0-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-B3V0-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B3V0-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B3V0-QR?
BZX8450-B3V0-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B3V0-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-B3V0-QR?
For technical support, including BZX8450-B3V0-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B3V0-QR requirements.
6.How does Aetrix verify that BZX8450-B3V0-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-B3V0-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-B3V0-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-B3V0-QR?
All BZX8450-B3V0-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B3V0-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-B3V0-QR part is unused and in its original packaging.
Return procedure for BZX8450-B3V0-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B3V0-QR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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