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Nexperia USA Inc. BZX38450-B2V7-QX
- Part No.:
- BZX38450-B2V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B2V7-QX.pdf
- Description:
- DIODE ZENER 2.7V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,249
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Product details
Overview
BZX38450-B2V7-QX from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in low-power circuits. It delivers a nominal 2.7 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω differential resistance at 5 mA, and 1.0 µA reverse current at 2.0 V, enabling stable operation in battery-powered sensor nodes and automotive microcontroller reset circuits.
For engineers reviewing the BZX38450-B2V7-QX datasheet, BZX38450-B2V7-QX pinout, BZX38450-B2V7-QX application, or BZX38450-B2V7-QX equivalent, this page provides verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data, and automotive-grade marking interpretation - all critical for low-bias analog design and functional safety-critical voltage monitoring.
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 diode capacitance of 190 pF at 0 V. Its low 50 µA test current enables minimal quiescent power draw, while the ±2 % tolerance ensures tight regulation without trimming.
The device features intentional leakage optimization per AN90031 for fast switching and noise reduction, and is qualified to AEC-Q101 with junction temperature rating up to 150 °C. Thermal resistance from junction to ambient is 415 K/W on FR4 PCB, supporting reliable operation in compact automotive ECUs and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage (VZ) | 2.65 V to 2.75 V at IZ = 50 µA - defines precise low-current reference point for reset thresholds and ADC references |
| Tolerance | ±2 % - enables direct use in 3.3 V or 5 V rail monitoring without external calibration |
| Differential Resistance (rdiff) | 600 Ω max at IZ = 5 mA - limits regulation error under load variation in low-current bias networks |
| Reverse Current (IR) | 1.0 µA max at VR = 2.0 V - ensures negligible standby leakage in always-on automotive modules |
| Power Dissipation (Ptot) | 300 mW max at Tamb ≤ 25 °C - supports continuous operation in thermally constrained SMD layouts |
| Junction Temperature (Tj) | −55 °C to +150 °C - validated for under-hood automotive environments and industrial edge sensors |
| AEC-Q101 Qualified | Yes - certified for automotive discrete semiconductor stress testing including HTGB, HTRB, and ESD |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive connection - reverse-biased during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces system standby power by >90 % vs. standard 5 mA Zeners |
| Automotive qualification | AEC-Q101 compliant - eliminates requalification effort for Tier 1 ECU designs |
| Leakage-optimized construction | Intentional minor IR rise per AN90031 - improves transient response and reduces broadband noise in LDO feedback paths |
| Thermal performance | Rth(j-a) = 415 K/W on FR4 - enables 100 % derating margin at 85 °C ambient in dense PCB layouts |
| Marking clarity | "8W" code per Table 4 - unambiguous identification on 1.25 mm wide body, compatible with automated optical inspection |
Applications
| Automotive Microcontroller Reset | Portable Sensor Biasing |
|---|---|
Use Scenario: Generating a clean 2.7 V reset threshold for 3.3 V automotive MCUs in body control modules. IC Role / Device Role / Timing Role: Zener-based voltage reference feeding comparator input for power-on reset assertion. Use Value: ±2 % tolerance and −3.5 mV/K TC ensure reset window remains within 2.6–2.8 V across −40 °C to +125 °C, meeting ISO 16750-4 requirements. |
Use Scenario: Providing stable bias voltage for MEMS accelerometer signal conditioning in wireless IoT nodes. IC Role / Device Role / Timing Role: Low-leakage voltage reference for op-amp offset nulling and ADC reference divider. Use Value: 1.0 µA reverse current at 2.0 V minimizes battery drain, extending 10-year coin-cell life in maintenance-free deployments. |
| Industrial Analog Front-End | Low-Power Voltage Monitor |
Use Scenario: Setting reference voltage for 12-bit SAR ADC in programmable logic controller analog inputs. IC Role / Device Role / Timing Role: Precision shunt regulator establishing VREF for ratiometric measurement circuits. Use Value: 600 Ω differential resistance ensures <0.5 LSB error under 10 µA load variation, maintaining ENOB > 11.5 bits. |
Use Scenario: Detecting brown-out conditions in battery-backed real-time clocks. IC Role / Device Role / Timing Role: Threshold element in discrete undervoltage lockout (UVLO) circuit with hysteresis. Use Value: Fast switching behavior from optimized leakage enables <10 µs response to supply sag, preventing RTC corruption during power transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C2V7-Q | ±5 % tolerance, higher 2.565–2.835 V range, 0.1 µA IR at 2.0 V | Lower cost, wider regulation band - suitable for non-critical bias where 5 % error acceptable | Select when cost sensitivity outweighs precision; avoid in reset or ADC reference roles |
| MMSZ4684T1G | 2.7 V nominal, ±5 %, 350 mW Ptot, SOD-123 package, no AEC-Q101 | Larger footprint (2.7 × 1.6 mm), higher thermal resistance (500 K/W), not automotive-qualified | Use only in commercial-grade consumer devices; unsuitable for automotive or industrial temperature cycling |
Compared with BZX38450-B2V7-QX, the BZX384-C2V7-Q trades precision for cost in non-safety-critical roles, while MMSZ4684T1G lacks AEC-Q101 validation and thermal performance needed for under-hood reliability - making the BZX38450-B2V7-QX the sole choice for automotive reset and high-stability analog references.
Availability
BZX38450-B2V7-QX is available at Aetrix Electronics and suitable for automotive electronics, portable instrumentation, industrial analog front-ends, and battery-powered sensor systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX38450-B2V7-QX 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, high-reliability discrete and logic devices for automotive, industrial, and mobile markets.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage reference and regulation in space-constrained, thermally demanding automotive and industrial applications.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-B2V7-QX?
The device exhibits controlled Zener breakdown at its nominal 2.7 V working voltage, with guaranteed regulation between 2.65 V and 2.75 V at 50 µA. It is not rated for sustained operation above 2.75 V in reverse bias - exceeding this risks thermal runaway due to its 300 mW power limit and 415 K/W thermal resistance.
Can BZX38450-B2V7-QX be used in forward-bias applications?
Yes - it functions as a standard silicon diode with 0.9 V forward voltage at 10 mA, but its primary design purpose is reverse-bias Zener regulation. Forward conduction is limited to 250 mA peak, and continuous forward current must remain below levels that exceed 300 mW dissipation on the PCB layout.
How does the "B" suffix in BZX38450-B2V7-QX affect performance?
The "B" denotes the tighter ±2 % tolerance grade (vs. "C" for ±5 %), confirmed by datasheet Table 8. It also indicates intentional minor leakage current optimization per AN90031, yielding faster switching and lower noise versus "C" variants - critical for precision reset and low-noise analog references.
Is the SOD323 package compatible with standard reflow profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The SOD323 outline in Figure 9 defines solder land dimensions (0.6 mm × 0.5 mm pads, 1.35 mm center-to-center), and thermal resistance data assumes standard FR4 with single-sided 35 µm copper, enabling drop-in use in automotive PCB assembly lines.
BZX38450-B2V7-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±2%
- Power - Max:
- 300 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:
- SOD-323
BZX38450-B2V7-QX FAQ
1.How can I place an order for BZX38450-B2V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B2V7-QX 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 BZX38450-B2V7-QX reliable?
The price and inventory of BZX38450-B2V7-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B2V7-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-B2V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B2V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B2V7-QX?
BZX38450-B2V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B2V7-QX 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 BZX38450-B2V7-QX?
For technical support, including BZX38450-B2V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B2V7-QX requirements.
6.How does Aetrix verify that BZX38450-B2V7-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-B2V7-QX 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 BZX38450-B2V7-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-B2V7-QX?
All BZX38450-B2V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B2V7-QX, 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 BZX38450-B2V7-QX part is unused and in its original packaging.
Return procedure for BZX38450-B2V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B2V7-QX Tags
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