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Nexperia USA Inc. BZX38450-B10-QX
- Part No.:
- BZX38450-B10-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B10-QX.pdf
- Description:
- DIODE ZENER 10V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,739
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Product details
Overview
BZX38450-B10-QX from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 10 V nominal regulation at 50 µA test current, with ±2 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-B10-QX datasheet, BZX38450-B10-QX pinout, BZX38450-B10-QX application, or BZX38450-B10-QX equivalent, this device serves as a precision, low-bias voltage reference in battery-powered sensor nodes, automotive body control modules, and portable instrumentation requiring stable 10 V clamping under microampere bias conditions.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 10.0 V at IZ = 50 µA, differential resistance ≤150 Ω at IZ = 5 mA, and temperature coefficient of +4.5 mV/K - indicating positive drift over temperature. Its low test current enables operation in ultra-low-power circuits where traditional 5 mA Zeners are unsuitable.
The device features intentional minor leakage current optimization per AN90031 for improved switching speed and reduced noise, and is qualified to AEC-Q101 with junction temperature rating 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 | 10.0 V at IZ = 50 µA - defines precise regulation point for low-bias reference design |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous operation in compact SOD323 footprint |
| Forward Voltage | ≤0.9 V at IF = 10 mA - enables predictable forward conduction during transient polarity reversal |
| Differential Resistance | ≤150 Ω at IZ = 5 mA - limits output impedance for stable regulation under small load variations |
| Thermal Resistance | 415 K/W (junction-to-ambient, free air) - informs derating requirements on standard FR4 PCB |
| Reverse Leakage | ≤0.1 µA at VR = 7.6 V - ensures minimal quiescent current in standby mode |
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; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables use in energy-harvesting and coin-cell applications where bias current must be minimized |
| AEC-Q101 qualification | Qualified for automotive underhood and cabin modules - guarantees reliability under thermal cycling and vibration stress |
| Optimized leakage profile | Intentional minor IR increase per AN90031 - reduces switching transients and high-frequency noise in feedback paths |
| Tight voltage tolerance | ±2 % B-series tolerance - eliminates need for external trimming in mid-precision analog references |
| Small-footprint packaging | SOD323 (SC-76) - saves board space in dense automotive ECUs and wearable medical sensors |
Applications
| Automotive Body Control Unit (BCU) | Portable Gas Sensor Interface |
|---|---|
Use Scenario: Stable 10 V reference for ADC biasing and microcontroller I/O level-shifting in door module electronics. IC Role / Device Role / Timing Role: Zener voltage regulator providing fixed reference voltage for analog signal conditioning circuitry. Use Value: Maintains <±2 % regulation across −40 °C to +125 °C ambient, ensuring consistent sensor measurement accuracy without active regulation. |
Use Scenario: Low-power voltage clamp for electrochemical gas sensor biasing in handheld air quality monitors. IC Role / Device Role / Timing Role: Passive voltage reference enabling sub-10 µA total system standby current. Use Value: Delivers 10 V regulation at 50 µA test current, reducing quiescent power by >95 % versus standard 5 mA Zener alternatives. |
| Industrial PLC Input Protection | Medical Wearable Battery Monitor |
Use Scenario: Overvoltage clamp on 24 V DC input channel of modular I/O card exposed to field wiring transients. IC Role / Device Role / Timing Role: Transient-suppressing Zener shunt protecting downstream TVS and interface ICs. Use Value: Withstands non-repetitive 40 W surge (100 µs pulse), limiting clamping voltage to ≤12 V during ESD events. |
Use Scenario: Precision reference for lithium-ion cell voltage monitoring in patch-style ECG devices. IC Role / Device Role / Timing Role: Low-drift Zener reference feeding delta-sigma ADC front-end. Use Value: +4.5 mV/K temperature coefficient enables software compensation, achieving ±0.5 % full-scale accuracy over 0–45 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C10-Q | ±5 % tolerance, higher max leakage (0.1 µA vs. 0.05 µA at 7.6 V), same SOD323 package | Acceptable where cost sensitivity outweighs precision; not recommended for ADC reference | Select when budget constraints dominate and ±5 % regulation error is acceptable in power rail supervision |
| MMSZ4701T1G | 10 V nominal, ±5 %, 500 mW Ptot, SOD-123 package (larger footprint), no AEC-Q101 qualification | Higher power handling but lacks automotive qualification and low-current optimization | Choose only for non-automotive industrial applications requiring >300 mW dissipation margin |
Compared with BZX38450-B10-QX, the BZX384-C10-Q trades precision for cost, while MMSZ4701T1G offers higher power at the expense of automotive compliance and low-bias performance - making the B10-QX uniquely suited for AEC-Q101-compliant, microampere-bias systems.
Availability
BZX38450-B10-QX is available at Aetrix Electronics and suitable for automotive body electronics, portable sensor interfaces, industrial PLC input protection, and medical wearable battery monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX38450-B10-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, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage reference and clamping in automotive and portable electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-B10-QX?
The nominal Zener voltage is 10.0 V with ±2 % tolerance, meaning guaranteed breakdown occurs between 9.8 V and 10.2 V at IZ = 50 µA. The absolute maximum non-repetitive peak reverse voltage is not defined; instead, the device is rated for 40 W non-repetitive surge (100 µs) at 25 °C junction temperature, corresponding to ~12 V clamping under transient conditions.
Can BZX38450-B10-QX be used in series for higher voltage regulation?
No - this Zener diode is not characterized or qualified for series operation. Its differential resistance (≤150 Ω), temperature coefficient (+4.5 mV/K), and leakage profile are specified individually. Cascading introduces unpredictable voltage division, thermal coupling, and mismatched aging, violating AEC-Q101 stress test assumptions and voiding qualification validity.
Is the SOD323 package compatible with standard reflow profiles?
Yes - Nexperia provides validated reflow soldering footprints (Fig. 10) for SOD323, supporting JEDEC J-STD-020D peak temperatures up to 260 °C. The package withstands standard lead-free reflow with 60–90 s above 217 °C, provided solder land dimensions (0.5 mm × 1.1 mm) and solder paste volume match the recommended 0.12 mm stencil thickness.
How does the "B" suffix differ from "C" in the BZX38450-Q series?
The "B" suffix denotes ±2 % voltage tolerance (e.g., BZX38450-B10-QX = 9.8–10.2 V), while "C" indicates approximately ±5 % (e.g., BZX38450-C10-Q = 9.5–10.5 V). Both share identical package, thermal specs, and AEC-Q101 qualification, but only "B" parts meet tight regulation requirements for precision analog references.
BZX38450-B10-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):
- 10 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 7.6 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-B10-QX FAQ
1.How can I place an order for BZX38450-B10-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B10-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-B10-QX reliable?
The price and inventory of BZX38450-B10-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-B10-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-B10-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B10-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B10-QX?
BZX38450-B10-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B10-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-B10-QX?
For technical support, including BZX38450-B10-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B10-QX requirements.
6.How does Aetrix verify that BZX38450-B10-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-B10-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-B10-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-B10-QX?
All BZX38450-B10-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B10-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-B10-QX part is unused and in its original packaging.
Return procedure for BZX38450-B10-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B10-QX 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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