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Nexperia USA Inc. BZX38450-C10-QF
- Part No.:
- BZX38450-C10-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C10-QF.pdf
- Description:
- DIODE ZENER 10V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:28,664
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Product details
Overview
BZX38450-C10-QF 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 ±5 % tolerance, 300 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-C10-QF datasheet, BZX38450-C10-QF pinout, BZX38450-C10-QF application, or BZX38450-C10-QF equivalent, this device is selected for precision low-bias voltage reference, ESD-robust signal-level clamping, and space-constrained automotive sensor biasing where leakage and thermal resistance are critical.
Technical Context
This Zener diode operates in reverse breakdown with a specified working voltage of 9.50 V to 10.50 V at IZ = 50 µA, exhibiting a differential resistance ≤150 Ω at 5 mA and a temperature coefficient of +4.5 mV/K. Its low 50 µA test current enables stable regulation in ultra-low-power circuits.
The device features intentional minor leakage current optimization per AN90031 for fast switching and noise reduction, and achieves Rth(j-a) = 415 K/W on FR4 PCB - critical for thermal management in sealed automotive modules without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 10 V (9.50–10.50 V range at 50 µA; enables accurate 10 V reference in battery-powered sensor front-ends) |
| Tolerance | ±5 % (C-series grade; balances cost and precision for non-critical biasing and clamping) |
| Test Current | 50 µA (enables stable regulation down to microamp-level supply currents; ideal for coin-cell or energy-harvesting systems) |
| Total Power Dissipation | 300 mW (derated above 25 °C ambient; supports continuous operation in under-hood environments up to +105 °C with layout-aware derating) |
| Junction Temperature Limit | 150 °C (AEC-Q101 qualified; ensures reliability in automotive engine control and lighting modules) |
| Forward Voltage | ≤0.9 V at 10 mA (low forward drop minimizes conduction loss during transient overvoltage clamping) |
| Reverse Leakage | ≤0.1 µA at VR = 7.6 V (ultra-low leakage preserves battery life in always-on vehicle subsystems) |
Pinout & Package
Package: SOD323 (SC-76), surface-mounted plastic package; 2 leads; 1.3 mm pitch; 1.7 mm × 1.25 mm × 0.95 mm body; 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; carries reverse breakdown current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for Zener conduction; solder point defines thermal path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables stable 10 V reference in µA-level bias networks without loading sensitive sources |
| AEC-Q101 qualification | Qualified for automotive applications including engine control units and ADAS sensor interfaces requiring extended temperature and lifetime reliability |
| Optimized leakage profile | Intentional minor rise in leakage per AN90031 improves switching speed and reduces broadband noise in feedback paths |
| SOD323 footprint | 1.7 mm × 1.25 mm body with 1.3 mm lead pitch - compatible with high-density PCB layouts and standard reflow processes |
| Thermal resistance | Rth(j-sp) = 110 K/W to cathode solder point - enables effective heat transfer to copper pour in thermally constrained modules |
Applications
| Automotive Cabin Sensors | Industrial IoT Node Biasing |
|---|---|
Use Scenario: Supplying stable 10 V bias to MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Zener voltage reference providing precise, low-drift excitation voltage for ratiometric sensor bridges. Use Value: ±5 % tolerance and +4.5 mV/K TC ensure <±2 % total error across −40 °C to +125 °C, meeting ASIL-B functional safety requirements. |
Use Scenario: Regulating reference voltage for ultra-low-power ADCs in battery-operated predictive maintenance sensors. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator maintaining 10 V reference while drawing only 50 µA from Li-SOCl₂ primary cell. Use Value: 50 µA test current and 0.1 µA max leakage at 7.6 V extend 10-year field life by minimizing standby drain. |
| USB-C Port Protection | Smart Lighting Driver Feedback |
Use Scenario: Clamping CC line voltage during hot-plug transients in automotive USB-C infotainment ports. IC Role / Device Role / Timing Role: Fast-switching Zener clamp limiting CC pin voltage to 10 V during ESD and surge events. Use Value: Optimized leakage profile per AN90031 reduces jitter in USB PD communication while surviving 8 kV HBM ESD. |
Use Scenario: Setting feedback threshold in constant-current LED drivers for adaptive headlamps. IC Role / Device Role / Timing Role: Precision 10 V Zener defining current-sense comparator trip point in analog feedback loop. Use Value: 150 Ω dynamic resistance at 5 mA ensures <1 % regulation error despite load-step-induced current variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38450-B10-Q | ±2 % tolerance (vs. ±5 %); higher test current (5 mA vs. 50 µA); lower rdiff (150 Ω vs. 150 Ω typical but tighter distribution) | Preferred for precision analog references where tighter initial accuracy outweighs higher bias current | Select when system-level calibration is impractical and ±2 % absolute accuracy is required at room temperature |
| MMSZ5240B-TP | Same 10 V nominal, ±5 %, but SOD-123 package (larger); Ptot = 500 mW; no AEC-Q101 qualification; higher leakage (≤5 µA @ 7.6 V) | Suitable for industrial non-automotive designs with relaxed thermal and reliability requirements | Choose only if board space allows SOD-123 and automotive qualification is not mandated |
Compared with BZX38450-B10-Q, the C10-Q trades initial accuracy for ultra-low bias current and automotive qualification; versus MMSZ5240B-TP, it delivers AEC-Q101 compliance and 50× lower leakage in a 30 % smaller footprint - critical for next-gen compact automotive electronics.
Availability
BZX38450-C10-QF is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial IoT node biasing, USB-C port protection, and smart lighting driver feedback requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX38450-C10-QF 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 delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for automotive, industrial, and consumer applications.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, low-noise voltage regulation in space- and power-constrained automotive electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-C10-QF?
The BZX38450-C10-QF has a nominal Zener voltage of 10 V with a guaranteed range of 9.50 V to 10.50 V at 50 µA test current. Breakdown begins within this range; operation below 9.50 V ensures non-conductive state with leakage ≤0.1 µA at 7.6 V. Absolute maximum reverse voltage is not defined - sustained operation outside the specified VZ range risks parametric shift or failure.
Can BZX38450-C10-QF be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and manufacturing spread, causing current hogging when paralleled. Even matched units will thermally diverge, risking thermal runaway. For >300 mW dissipation, use a single higher-rated Zener or an active shunt regulator. Derating per PCB copper area and ambient temperature is mandatory.
Is the SOD323 package compatible with standard reflow profiles?
Yes - the SOD323 package is qualified for JEDEC J-STD-020D reflow profiles. Peak temperature must not exceed 260 °C for ≤30 seconds. The recommended footprint (Fig. 10) uses 0.5 mm × 0.6 mm solder lands with 0.6 mm solder resist opening; thermal relief to inner layers must be minimized to avoid tombstoning.
How does the "C" suffix differ from "B" in the BZX38450-Q series?
The "C" suffix denotes ±5 % tolerance and intentional minor leakage current optimization per AN90031 for improved switching speed and noise reduction. The "B" suffix indicates ±2 % tolerance and standard leakage behavior. Both share identical package, power rating, and AEC-Q101 qualification - selection depends on accuracy vs. dynamic performance trade-off.
BZX38450-C10-QF 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-QF FAQ
1.How can I place an order for BZX38450-C10-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C10-QF 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-QF reliable?
The price and inventory of BZX38450-C10-QF 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-QF is usually 5 days.
3.What payment methods are accepted for BZX38450-C10-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C10-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C10-QF?
BZX38450-C10-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C10-QF 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-QF?
For technical support, including BZX38450-C10-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C10-QF requirements.
6.How does Aetrix verify that BZX38450-C10-QF is sourced from the original manufacturer or authorized distributors?
All BZX38450-C10-QF 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-QF meets industry standards.
7.What is the process for return or replacement of BZX38450-C10-QF?
All BZX38450-C10-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C10-QF, 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-QF part is unused and in its original packaging.
Return procedure for BZX38450-C10-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C10-QF 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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