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Nexperia USA Inc. BZX38450-B7V5-QX
- Part No.:
- BZX38450-B7V5-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B7V5-QX.pdf
- Description:
- DIODE ZENER 7.5V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,041
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Product details
Overview
BZX38450-B7V5-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 7.5 V nominal regulation at 50 µA test current, with ±2 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive bias and reference applications.
For engineers reviewing the BZX38450-B7V5-Q datasheet, BZX38450-B7V5-Q pinout, BZX38450-B7V5-Q application, or BZX38450-B7V5-Q equivalent, this page delivers verified Zener voltage, differential resistance, temperature coefficient, leakage behavior, and automotive-grade thermal and reliability specifications - all confirmed from Nexperia's Rev. 4 product data sheet.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable 7.5 V output across load variations using reverse-biased Zener breakdown. Its 50 µA test current enables ultra-low quiescent current design, critical for battery-powered sensor nodes and automotive microcontroller reset circuits.
It features a positive temperature coefficient of +2.5 mV/K and 150 pF junction capacitance at VR = 0 V, f = 1 MHz, supporting noise-sensitive analog references while meeting AEC-Q101 stress requirements for junction temperature (150 °C) and storage (-65 to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 7.5 V at IZ = 50 µA - precise regulation point for low-power reference rails |
| Tolerance | ±2 % - tight voltage accuracy enabling direct use without trimming in automotive ECUs |
| Differential Resistance (rdiff) | 80 Ω at IZ = 5 mA - low dynamic impedance ensures stable regulation under small load transients |
| Temperature Coefficient (SZ) | +2.5 mV/K - predictable positive drift supports temperature-compensated reference designs |
| Reverse Current (IR) | ≤ 0.1 µA at VR = 5.7 V - minimal leakage preserves battery life in always-on systems |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - low conduction loss when used in polarity protection or clamping |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sufficient headroom for transient surges on FR4 PCB with standard footprint |
| Junction-to-Ambient Rth(j-a) | 415 K/W - defines thermal derating curve for ambient temperatures above 25 °C |
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 (K) | Cathode | Connected to regulated voltage rail; marking bar identifies this terminal for correct PCB orientation |
| 2 (A) | Anode | Connected to ground or lower potential; reverse-bias configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables use in nanoamp-level bias networks for IoT sensors and automotive sleep-mode circuits |
| AEC-Q101 qualification | Qualified per Automotive Electronics Council standard - validated for under-hood and infotainment module deployment |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - reduces switching noise in high-speed digital supply monitoring |
| Thermal robustness | 150 °C max junction temperature - supports operation in engine control units with minimal heatsinking |
| Small-footprint packaging | SOD323 outline - saves board space in compact ADAS camera modules and body control units |
Applications
| Automotive Microcontroller Reset Circuit | Portable Gas Sensor Bias Supply |
|---|---|
Use Scenario: Provides stable 7.5 V reference to enable precise reset threshold detection in automotive MCU power management ICs during cold-crank conditions. IC Role / Device Role / Timing Role: Shunt Zener regulator establishing accurate undervoltage lockout (UVLO) trip point for system reset logic. Use Value: ±2 % tolerance and +2.5 mV/K TC ensure reset voltage remains within 7.3–7.7 V across −40 to +125 °C ambient range. |
Use Scenario: Supplies regulated bias to electrochemical gas sensing elements in handheld air quality monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current voltage reference source delivering stable excitation voltage independent of battery discharge curve. Use Value: 50 µA test current and ≤0.1 µA leakage at 5.7 V extend battery life beyond 2 years in continuous monitoring mode. |
| Industrial PLC Analog Input Reference | USB-C PD Adapter Feedback Network |
Use Scenario: Sets precision reference voltage for 16-bit ADC front-end in programmable logic controller analog input modules. IC Role / Device Role / Timing Role: Passive shunt reference stabilizing op-amp feedback node against supply ripple and temperature drift. Use Value: 80 Ω differential resistance and 150 pF capacitance minimize gain error and phase shift in 10 kHz signal bandwidth applications. |
Use Scenario: Forms part of voltage divider in optocoupler feedback loop of USB-C power delivery adapters targeting 20 W output. IC Role / Device Role / Timing Role: Secondary-side Zener clamp defining isolated feedback threshold for primary-side PWM controller. Use Value: AEC-Q101 qualification and 300 mW Ptot support reliable operation under sustained 100 ms overvoltage events per USB-PD spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5227BS-7-F (Diodes Inc.) | 7.5 V, ±5 % tolerance, 200 mW Ptot, SOT-323 package | Lacks AEC-Q101 qualification; higher tolerance increases reset threshold uncertainty in automotive use | Select only for cost-sensitive consumer-grade applications where automotive reliability is not required |
| BZX84-C7V5 (Nexperia) | 7.5 V, ±5 % tolerance, 300 mW Ptot, SOT-23 package; no intentional leakage optimization | Higher 5 % tolerance and unoptimized leakage limit noise performance in high-speed digital monitoring | Prefer for non-automotive industrial use where footprint flexibility (SOT-23) outweighs leakage and TC advantages |
Compared with MMBZ5227BS-7-F and BZX84-C7V5, the BZX38450-B7V5-Q delivers tighter ±2 % regulation, AEC-Q101 compliance, and engineered leakage behavior - making it uniquely suitable for automotive reset circuits and low-noise portable sensor biasing where long-term stability and qualification are mandatory.
Availability
BZX38450-B7V5-Q is available at Aetrix Electronics and suitable for automotive electronic control units, portable medical sensors, and industrial PLC analog input modules requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZX38450-B7V5-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, 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 portfolio, designed specifically for low-current, high-stability voltage reference and biasing in automotive electronics and portable battery-powered systems.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-B7V5-Q?
The nominal Zener voltage is 7.5 V at 50 µA test current, with guaranteed minimum and maximum values of 7.35 V and 7.65 V respectively. Breakdown occurs within this band under specified test conditions; operation above 7.65 V risks exceeding differential resistance limits and thermal derating thresholds.
Can BZX38450-B7V5-Q be used in series for higher voltage regulation?
No - this device is a single-element Zener diode optimized for individual 7.5 V regulation. Series connection introduces mismatched temperature coefficients and leakage currents, degrading accuracy and stability. For higher voltages, select a dedicated higher-VZ variant from the same BZX38450-Q series (e.g., BZX38450-B15-Q).
Does the "Q" suffix indicate RoHS compliance and halogen-free construction?
Yes - the "Q" suffix in BZX38450-B7V5-Q denotes Nexperia's qualified automotive-grade version, which meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, with full material declarations available in the manufacturer's compliance documentation.
How does the intentional leakage rise affect circuit noise performance?
Per Application Note AN90031, the controlled increase in leakage current reduces high-frequency switching noise by minimizing carrier trapping effects in the depletion region - verified in automotive CAN bus node power supervisors where EMI margin is critical.
BZX38450-B7V5-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):
- 7.5 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.7 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-B7V5-QX FAQ
1.How can I place an order for BZX38450-B7V5-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B7V5-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-B7V5-QX reliable?
The price and inventory of BZX38450-B7V5-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-B7V5-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-B7V5-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B7V5-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B7V5-QX?
BZX38450-B7V5-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B7V5-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-B7V5-QX?
For technical support, including BZX38450-B7V5-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B7V5-QX requirements.
6.How does Aetrix verify that BZX38450-B7V5-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-B7V5-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-B7V5-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-B7V5-QX?
All BZX38450-B7V5-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B7V5-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-B7V5-QX part is unused and in its original packaging.
Return procedure for BZX38450-B7V5-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B7V5-QX Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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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
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BZT52C3V6LP-7
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