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Nexperia USA Inc. BZX38450-C5V1-QF
- Part No.:
- BZX38450-C5V1-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C5V1-QF.pdf
- Description:
- DIODE ZENER 5.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,948
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Product details
Overview
BZX38450-C5V1-QF from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 5.1 V nominal regulation at 50 µA test current, with ±5 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-C5V1-QF datasheet, BZX38450-C5V1-QF pinout, BZX38450-C5V1-QF application, or BZX38450-C5V1-QF equivalent, this part serves as a precision low-bias voltage reference in battery-powered sensor nodes, ECU voltage monitoring circuits, and automotive infotainment power rail clamping where stable 5.1 V regulation at microampere bias is required.
Technical Context
This Zener diode operates in reverse breakdown with a specified working voltage of 4.85 V to 5.36 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.0 mV/K and differential resistance of 500 Ω at 5 mA. Its low leakage design supports fast switching and noise reduction per AN90031.
Thermal resistance from junction to ambient is 415 K/W on FR4 PCB; junction temperature is rated up to 150 °C. The device is qualified to AEC-Q101, confirming suitability for under-hood automotive environments with −40 °C to +125 °C operating ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at IZ = 50 µA - defines precise regulation point for low-power biasing |
| Voltage Tolerance | ±5 % - ensures consistent clamping across production lots in cost-sensitive automotive modules |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous operation in compact SOD323 footprint without forced cooling |
| Differential Resistance | 500 Ω at IZ = 5 mA - determines regulation stiffness and output impedance in feedback paths |
| Forward Voltage | 0.9 V at IF = 10 mA - enables predictable forward conduction during transient overvoltage events |
| Junction Temperature Limit | 150 °C - allows reliable operation in engine control unit (ECU) and body electronics mounting locations |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package, 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch. Cathode identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables direct use in ultra-low-power sensor biasing without additional current sources |
| Optimized leakage profile | Intentional minor rise in IR - reduces switching noise and improves transient response in EMI-sensitive automotive domains |
| Automotive qualification | AEC-Q101 compliant - guarantees robustness against thermal stress, vibration, and long-term aging in vehicle ECUs |
| Small-footprint packaging | SOD323 outline - saves board space in dense ADAS camera modules and gateway controller PCBs |
| Stable temperature coefficient | −2.0 mV/K - minimizes drift over −40 °C to +125 °C ambient, critical for engine bay voltage references |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Provides stable 5.1 V reference for analog-to-digital converter (ADC) inputs monitoring throttle position and coolant temperature sensors. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to fix reference potential independent of supply fluctuations. Use Value: Enables <1 % measurement error over full automotive temperature range due to tight ±5 % tolerance and −2.0 mV/K TC. |
Use Scenario: Clamps 5 V USB-derived power rail in head unit to prevent overvoltage damage during load dump transients. IC Role / Device Role / Timing Role: Low-leakage Zener clamp absorbing surge energy while maintaining rail integrity during 12 V system spikes. Use Value: Limits rail excursion to ≤5.4 V during 100 µs surges, leveraging 40 W non-repetitive peak power rating and fast turn-on. |
| Body Control Module (BCM) Sensor Bias | ADAS Camera Module Voltage Monitor |
Use Scenario: Supplies regulated bias current to Hall-effect door latch sensors in low-power sleep mode. IC Role / Device Role / Timing Role: Low-current Zener regulator delivering stable 5.1 V at 50 µA to enable microamp-level sensor quiescent operation. Use Value: Reduces BCM standby current by >30 % versus resistor-zener alternatives due to optimized leakage and minimal bias requirement. |
Use Scenario: Monitors 5 V imaging sensor supply in surround-view camera, triggering fault flag if voltage deviates beyond ±3 %. IC Role / Device Role / Timing Role: Precision Zener element in comparator-based monitor circuit detecting undervoltage/overvoltage conditions. Use Value: Achieves ±0.15 V detection threshold accuracy using 4.85–5.36 V regulation window and 500 Ω dynamic impedance. |
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-B5V1-Q | ±2 % tolerance, higher rdiff (600 Ω), tighter TC (−2.0 mV/K same), same SOD323 package | Better regulation accuracy but higher dynamic impedance; suited for precision ADC references where stability outweighs noise sensitivity | Select when ±2 % tolerance is mandatory and 500–600 Ω rdiff is acceptable in feedback loop design |
| MMSZ5231B-TP | ±5 % tolerance, 500 mW Ptot, 1000 Ω rdiff at 20 mA, no AEC-Q101 qualification | Lacks automotive qualification and optimized leakage; suitable only for industrial/commercial grade designs | Choose only for non-automotive applications where cost is primary and AEC-Q101 compliance is not required |
Compared with BZX38450-C5V1-QF, BZX384-B5V1-Q offers tighter voltage tolerance but higher impedance, while MMSZ5231B-TP lacks automotive qualification and exhibits higher dynamic impedance-making the C-series optimal for noise-sensitive, AEC-compliant 5.1 V clamping at microamp bias levels.
Availability
BZX38450-C5V1-QF is available at Aetrix Electronics and suitable for automotive ECU reference circuits, infotainment power rail protection, and ADAS camera voltage monitoring requiring stable component supply with full traceability and lifecycle support.
Supply support for BZX38450-C5V1-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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current, low-noise voltage regulation in automotive electronics where microampere bias, thermal stability, and fast transient response are critical.
FAQ
What is the maximum reverse current at 5.1 V regulation for BZX38450-C5V1-QF?
At VR = 5.1 V and Tj = 25 °C, the typical reverse current is 3.0 µA. The datasheet specifies a maximum of 5.0 µA under those conditions, verified per Table 8 electrical characteristics for the C5V1 selection. This low leakage supports battery longevity in always-on automotive modules.
Can BZX38450-C5V1-QF be used in place of a 5.0 V Zener in an existing design?
Yes, with validation: its 4.85–5.36 V regulation range overlaps standard 5.0 V Zeners, but the tighter 5.1 V nominal point and −2.0 mV/K temperature coefficient require checking system margin across −40 °C to +125 °C. No layout change is needed-it uses the same SOD323 footprint.
Does BZX38450-C5V1-QF support reflow soldering per JEDEC J-STD-020?
Yes. Nexperia specifies compatibility with standard Pb-free reflow profiles, including peak temperatures up to 260 °C for ≤30 seconds. The SOD323 package outline and recommended solder land pattern (Fig. 10) align with JEDEC J-STD-020D requirements for small-body discrete devices.
How does the "C" suffix differ from "B" in the BZX38450-Q series?
The "C" suffix denotes ±5 % voltage tolerance and intentional minor leakage current optimization for fast switching and noise reduction (per AN90031), whereas "B" indicates ±2 % tolerance and standard leakage. Both share identical SOD323 packaging, thermal specs, and AEC-Q101 qualification.
BZX38450-C5V1-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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-C5V1-QF FAQ
1.How can I place an order for BZX38450-C5V1-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C5V1-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-C5V1-QF reliable?
The price and inventory of BZX38450-C5V1-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-C5V1-QF is usually 5 days.
3.What payment methods are accepted for BZX38450-C5V1-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C5V1-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C5V1-QF?
BZX38450-C5V1-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C5V1-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-C5V1-QF?
For technical support, including BZX38450-C5V1-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C5V1-QF requirements.
6.How does Aetrix verify that BZX38450-C5V1-QF is sourced from the original manufacturer or authorized distributors?
All BZX38450-C5V1-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-C5V1-QF meets industry standards.
7.What is the process for return or replacement of BZX38450-C5V1-QF?
All BZX38450-C5V1-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C5V1-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-C5V1-QF part is unused and in its original packaging.
Return procedure for BZX38450-C5V1-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C5V1-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
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
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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