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Nexperia USA Inc. BZX38450-C10-QX
- Part No.:
- BZX38450-C10-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C10-QX.pdf
- Description:
- DIODE ZENER 10V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:20,107
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Product details
Overview
BZX38450-C10-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and regulation at 10 V nominal with ±5 % tolerance. It delivers stable regulation at 50 µA test current, exhibits 7.6 V forward voltage at 10 mA, and supports automotive-grade operation per AEC-Q101. It is used in battery-powered sensor signal conditioning circuits requiring low quiescent current.
For engineers reviewing the BZX38450-C10-Q datasheet, BZX38450-C10-Q pinout, BZX38450-C10-Q application, or BZX38450-C10-Q equivalent, key selection criteria include its 10 V Zener voltage tolerance, 300 mW power dissipation limit, SOD323 thermal resistance (Rth(j-a) = 415 K/W), and AEC-Q101 qualification for under-hood automotive electronics.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable 10 V reverse breakdown across its cathode-anode terminals when biased above its knee current (IZ = 50 µA). Its differential resistance is 150 Ω at IZ = 5 mA, and temperature coefficient is +4.5 mV/K - enabling predictable drift compensation in temperature-sensitive references.
The BZX38450-C10-Q features intentionally elevated leakage current versus the B-series to reduce switching noise and improve transient response in low-power analog monitoring paths. Its 90 pF capacitance at 0 V and 100 µA reverse current at VR = 7.6 V support stable operation in high-impedance bias networks without oscillation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.5 V to 10.5 V at IZ = 50 µA - defines tight regulation window for 10 V reference applications |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - enables low-loss forward conduction during polarity protection or clamping |
| Differential Resistance (rdiff) | 150 Ω at IZ = 5 mA - determines output impedance and load regulation error in shunt reference designs |
| Reverse Current (IR) | 0.1 µA at VR = 7.6 V - ensures minimal standby current draw in battery-critical systems |
| Thermal Resistance (Rth(j-a)) | 415 K/W - defines junction-to-ambient temperature rise per watt on single-sided FR4 board |
| Capacitance (Cd) | 90 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise rejection and stability in feedback loops |
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 node; marking bar identifies this terminal for correct PCB orientation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes shunt regulation path through series resistor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use up to +150 °C ambient, supporting ISO/TS 16949 production environments |
| Low test current operation | Specified at 50 µA - enables regulation in micro-power sensor biasing and IoT endpoint circuits |
| Optimized leakage profile | Intentionally elevated IR vs. B-series - reduces switching transients and improves noise immunity in ADC reference buffers |
| Tight thermal resistance control | Rth(j-sp) = 110 K/W to cathode solder point - allows accurate thermal modeling for reliability prediction |
| Two tolerance options | ±2 % (B-series) and ±5 % (C-series) - C10-Q provides cost-optimized accuracy for non-critical voltage references |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Voltage reference for thermistor-based cabin temperature sensing in HVAC control modules. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 10 V bias to ratiometric ADC front-end. Use Value: ±5 % tolerance and AEC-Q101 qualification ensure long-term calibration stability across −40 °C to +125 °C operating range. |
Use Scenario: Precision bias supply for low-power ECG amplifier stages in wearable cardiac monitors. IC Role / Device Role / Timing Role: Low-current Zener regulator establishing clean 10 V reference for op-amp gain-setting network. Use Value: 50 µA test current and 0.1 µA leakage minimize battery drain while maintaining <1 % reference error over shelf life. |
| Industrial PLC Input Modules | Smart Meter Voltage Monitoring |
Use Scenario: Analog input protection and scaling in 4–20 mA loop-powered field transmitters. IC Role / Device Role / Timing Role: Overvoltage clamp and precision reference for current-to-voltage conversion circuitry. Use Value: 300 mW power rating and 150 Ω dynamic impedance enable robust 24 V loop interface with <0.5 % linearity error. |
Use Scenario: Mains voltage scaling and isolation barrier reference in Class 0.5 electricity meters. IC Role / Device Role / Timing Role: Stable 10 V Zener reference for metrology ADC driver stage in isolated power supply domain. Use Value: 90 pF capacitance and +4.5 mV/K tempco allow accurate AC RMS measurement with <0.1 % temperature-induced drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38450-B10-Q | ±2 % tolerance (9.8 V–10.2 V), lower leakage current, same SOD323 package | Higher accuracy required in metrology or calibration equipment where 0.2 V tolerance matters | Select B10-Q when reference stability dominates over cost and leakage sensitivity |
| MMSZ5240B-TP | 10 V ±5 %, 500 mW Ptot, SOD-123 package, no AEC-Q101 qualification | General-purpose industrial use without automotive qualification or thermal constraints | Choose MMSZ5240B-TP only for non-automotive, higher-power applications where footprint flexibility is acceptable |
Compared with BZX38450-C10-Q, the B10-Q offers tighter regulation at the expense of higher cost and reduced noise performance, while MMSZ5240B-TP trades automotive qualification and thermal efficiency for higher power headroom and broader distributor availability.
Availability
BZX38450-C10-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial PLC input modules, and smart meter voltage monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX38450-C10-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX38450-Q series belongs to Nexperia's automotive-grade Zener regulator portfolio, engineered specifically for low-power, high-stability voltage reference needs in harsh-environment electronics such as engine control units and ADAS subsystems.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-C10-Q?
The nominal Zener voltage is 10 V with a guaranteed range of 9.5 V to 10.5 V at 50 µA test current. Breakdown occurs within this band; operation below 9.5 V places the device in sub-threshold reverse bias with leakage <0.1 µA, while exceeding 10.5 V risks entering unregulated avalanche region unless current is strictly limited by external series resistance.
Can BZX38450-C10-Q be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients and parameter spread that prevent reliable current sharing. Parallel connection risks thermal runaway and premature failure. For >300 mW requirements, use a single higher-rated Zener or implement active regulation with a transistor-based shunt or series pass design.
How does the C-series leakage optimization affect noise performance?
The C-series intentionally increases reverse leakage versus the B-series to dampen high-frequency ringing during turn-on/turn-off transitions. This reduces broadband noise coupling into adjacent analog circuits, making it preferable in ADC reference buffers and low-noise amplifier bias networks where spectral purity matters more than ultra-low standby current.
Is the SOD323 package compatible with standard reflow profiles for lead-free assembly?
Yes - the SOD323 package is rated for JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260 °C for ≤ 30 seconds. The recommended footprint (Fig. 10) uses 0.5 mm solder lands and 0.6 mm solder resist openings to ensure coplanarity and void-free joints on fine-pitch PCBs.
BZX38450-C10-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:
- ±5%
- 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:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C10-QX FAQ
1.How can I place an order for BZX38450-C10-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C10-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-C10-QX reliable?
The price and inventory of BZX38450-C10-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-C10-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C10-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C10-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C10-QX?
BZX38450-C10-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C10-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-C10-QX?
For technical support, including BZX38450-C10-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C10-QX requirements.
6.How does Aetrix verify that BZX38450-C10-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C10-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-C10-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C10-QX?
All BZX38450-C10-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C10-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-C10-QX part is unused and in its original packaging.
Return procedure for BZX38450-C10-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C10-QX Tags
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BZT52C15S-7-F
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MM5Z5V1ST1G
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