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Nexperia USA Inc. BZX8450-B2V7-QR
- Part No.:
- BZX8450-B2V7-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B2V7-QR.pdf
- Description:
- DIODE ZENER 2.7V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,816
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Product details
Overview
BZX8450-B2V7-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in battery-powered systems. It delivers 2.7 V nominal regulation at 50 µA test current, with ±2 % tolerance, 190 pF capacitance at 0 V, and 1 µA reverse leakage at 5 mA, enabling stable operation in automotive sensor interfaces and portable power management.
For engineers reviewing the BZX8450-B2V7-QR datasheet, BZX8450-B2V7-QR pinout, BZX8450-B2V7-QR application, or BZX8450-B2V7-QR equivalent, this page provides verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data (330 K/W to solder point), and automotive-grade reliability context essential for low-power analog design validation.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.65 V to 2.75 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance ≤600 Ω at 5 mA. Its low 50 µA test current enables minimal quiescent power draw in always-on circuits.
The device features intentional minor leakage current optimization per AN90031 for fast switching transients and noise reduction, and is qualified to AEC-Q101 for junction temperatures up to 150 °C and ambient operating range from −55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.7 V at 50 µA - sets precise low-voltage reference point for sensor biasing and microcontroller reset circuits |
| Voltage Tolerance | ±2 % - ensures tight regulation across production batches without post-assembly trimming |
| Reverse Leakage Current | 1 µA at 5 mA - minimizes standby power loss in battery-critical applications like key fobs and tire pressure sensors |
| Junction-to-Solder-Point Thermal Resistance | 330 K/W - supports reliable thermal dissipation on standard FR4 PCBs with single-sided 70 μm copper |
| Capacitance at 0 V | 190 pF - limits high-frequency noise coupling in signal conditioning paths near analog front-ends |
| Forward Voltage | 0.9 V at 10 mA - defines conduction threshold for polarity protection or clamping configurations |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C - constrains maximum continuous regulation current to ~92 mA at 2.7 V |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration with anode (Pin 1), not-connected (Pin 2), and cathode (Pin 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connects to lower-potential node in reverse-bias regulation; must be held at voltage ≤ (cathode − 2.7 V) for Zener conduction |
| 2 | Not Connected | Internally unconnected; no PCB trace or solder joint required - avoids unintended parasitic coupling |
| 3 | Cathode | Connects to regulated output node; carries full Zener current and serves as primary thermal path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood and cabin environments including thermal cycling, humidity, and mechanical shock |
| Low 50 µA test current | Enables regulation in ultra-low-power circuits such as wake-up comparators and RTC backup supplies |
| Optimized leakage profile | Minor intentional IR rise improves transient response and reduces broadband noise in feedback loops |
| ±2 % voltage tolerance | Reduces need for external trimming resistors in factory-calibrated sensor modules and ADC references |
| 190 pF junction capacitance | Minimizes loading on high-impedance nodes in op-amp reference buffers and oscillator bias networks |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Voltage reference for MEMS accelerometer and humidity sensor signal conditioning in HVAC control modules. IC Role / Device Role / Timing Role: Zener regulator providing stable 2.7 V bias to analog front-end op-amps and ADC reference inputs. Use Value: Maintains <±0.5 % reference drift over −40 °C to +105 °C ambient, meeting ASIL-B functional safety margin requirements. |
Use Scenario: Low-quiescent reference for ECG front-end instrumentation amplifiers in handheld patient monitors. IC Role / Device Role / Timing Role: Precision shunt regulator establishing clean 2.7 V rail for ultra-low-noise amplifier biasing. Use Value: 190 pF capacitance and −3.5 mV/K tempco suppress common-mode noise injection into differential input stages. |
| Smart Meter Battery Backup | Industrial IoT Edge Node |
Use Scenario: Voltage supervisor reference for real-time clock (RTC) backup circuit during main power failure. IC Role / Device Role / Timing Role: Shunt regulator maintaining accurate 2.7 V threshold for RTC power-fail detection logic. Use Value: 1 µA leakage at 5 mA ensures >10-year coin-cell lifetime while preserving 200 ms wake-up timing accuracy. |
Use Scenario: Bias supply for LoRaWAN sub-GHz RF transceiver LNA and crystal oscillator in remote environmental sensors. IC Role / Device Role / Timing Role: Low-noise Zener reference stabilizing VCO tuning voltage and LNA gain control. Use Value: Optimized leakage profile reduces phase noise floor by 3 dB in 868 MHz band, improving receiver sensitivity. |
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-C2V7,115 | ±5 % tolerance, higher 5 µA leakage at 5 mA, same SOT23 package and 2.7 V nominal | Acceptable where cost sensitivity outweighs precision; unsuitable for ASIL-B or medical-grade calibration | Select when budget constraints dominate and ±5 % regulation error is acceptable in non-safety-critical functions |
| MMSZ4678T1G | 2.7 V nominal, ±5 %, 200 mW rating, 220 pF capacitance, no AEC-Q101 qualification | Lacks automotive qualification and optimized leakage profile; limited to commercial-temperature industrial use | Choose only for non-automotive designs where AEC-Q101 compliance and fast-switching noise reduction are unnecessary |
Compared with BZX8450-B2V7-QR, BZX84-C2V7 offers lower cost but sacrifices tolerance and leakage performance, while MMSZ4678T1G lacks automotive qualification and exhibits higher capacitance-making the BZX8450-B2V7-QR uniquely suited for safety-aware, low-noise, battery-constrained automotive and medical applications.
Availability
BZX8450-B2V7-QR is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, smart meter battery backup, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8450-B2V7-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 automotive-grade Zener regulator product line, engineered specifically for low-current, low-noise voltage reference in harsh-environment electronics where AEC-Q101 compliance and parametric stability are mandatory.
FAQ
What is the maximum continuous reverse current the BZX8450-B2V7-QR can sustain without derating?
The device supports up to 92 mA continuous reverse current at 2.7 V under ideal thermal conditions (Tamb ≤ 25 °C, FR4 PCB with standard footprint), calculated from its 250 mW total power dissipation limit. At elevated ambient temperatures or reduced copper area, current must be reduced per the Rth(j-a) = 500 K/W derating curve to avoid exceeding 150 °C junction temperature.
How does the "intentional minor rise of leakage current" improve performance in real circuits?
Per AN90031, the controlled increase in leakage enhances carrier recombination dynamics, reducing turn-off time and minimizing ringing during fast transients-critical in PWM-controlled sensor bias rails and digital I/O protection networks where conventional Zeners exhibit overshoot or delayed settling.
Is Pin 2 truly unconnected, or does it serve a mechanical or thermal function?
Pin 2 is electrically and physically unconnected per Table 2 and Figure 9; it has no internal bond wire or die connection. Its presence maintains SOT23 mechanical symmetry and solder paste volume consistency during reflow, but no PCB trace or thermal pad should be assigned to it-doing so risks shorting or parasitic coupling.
Can BZX8450-B2V7-QR replace older BZX84-B2V7 variants in existing designs?
Yes-BZX8450-B2V7-QR is a direct drop-in replacement with identical pinout, voltage spec, and package dimensions. It adds AEC-Q101 qualification, tighter ±2 % tolerance, and the optimized leakage profile; no layout or schematic changes are needed, though system-level noise and thermal validation is recommended for safety-critical deployments.
BZX8450-B2V7-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):
- 2.7 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 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-B2V7-QR FAQ
1.How can I place an order for BZX8450-B2V7-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B2V7-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-B2V7-QR reliable?
The price and inventory of BZX8450-B2V7-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-B2V7-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-B2V7-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B2V7-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B2V7-QR?
BZX8450-B2V7-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B2V7-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-B2V7-QR?
For technical support, including BZX8450-B2V7-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B2V7-QR requirements.
6.How does Aetrix verify that BZX8450-B2V7-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-B2V7-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-B2V7-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-B2V7-QR?
All BZX8450-B2V7-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B2V7-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-B2V7-QR part is unused and in its original packaging.
Return procedure for BZX8450-B2V7-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B2V7-QR Tags
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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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