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Nexperia USA Inc. BZX38450-C2V0-QF
- Part No.:
- BZX38450-C2V0-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C2V0-QF.pdf
- Description:
- DIODE ZENER 2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,707
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Product details
Overview
BZX38450-C2V0-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 2.0 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-C2V0-Q datasheet, BZX38450-C2V0-Q pinout, BZX38450-C2V0-Q application, or BZX38450-C2V0-Q equivalent, key selection criteria include low-bias operation capability, thermal resistance (Rth(j-a) = 415 K/W), cathode/anode polarity marking, and leakage current optimization for noise-sensitive portable systems.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable reverse breakdown at 2.0 V under low-current bias (IZ = 50 µA), with differential resistance ≤600 Ω at IZ = 5 mA and temperature coefficient of −3.5 mV/K - enabling predictable drift compensation in battery-powered sensor nodes.
Its SOD323 package features a marked cathode (bar) on Pin 1, anode on Pin 2, and is qualified per AEC-Q101 for junction temperatures up to 150 °C, supporting operation across −55 °C to +150 °C ambient with 0.9 V forward voltage at 10 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.0 V at IZ = 50 µA - defines precise regulation point for ultra-low-power biasing |
| Tolerance | ±5 % - supports cost-optimized designs where tighter tolerance is not required |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC load capability on standard FR4 PCB |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - determines output impedance and regulation stiffness under varying load |
| Forward Voltage | 0.9 V at IF = 10 mA - defines conduction threshold when used in series protection or clamping roles |
| Junction Temperature Limit | 150 °C - enables reliable operation in under-hood automotive environments |
| Thermal Resistance (j-a) | 415 K/W - quantifies self-heating impact on voltage stability in unheatsinked layouts |
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 end of package.
| 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 operation | Specified at 50 µA - enables regulation in micro-power circuits such as coin-cell IoT sensors |
| AEC-Q101 qualification | Qualified for automotive applications - ensures reliability in engine control, body electronics, and ADAS subsystems |
| Optimized leakage profile | Intentional minor rise in IR - reduces switching noise and improves transient response in signal conditioning paths |
| Small-footprint packaging | SOD323 footprint - saves board space in compact consumer and automotive modules without sacrificing thermal margin |
Applications
| Automotive Body Control Module (BCM) | Portable Medical Sensor Node |
|---|---|
Use Scenario: Voltage reference for analog front-end of door lock actuator position sensing circuit. IC Role / Device Role / Timing Role: Shunt regulator providing stable 2.0 V bias to op-amp input stage and ADC reference divider. Use Value: Maintains <±10 mV regulation over −40 °C to +125 °C ambient, ensuring consistent sensor offset calibration across vehicle lifetime. |
Use Scenario: Low-power voltage reference in wearable ECG patch with CR2032 battery supply. IC Role / Device Role / Timing Role: Zener element establishing precision bias point for instrumentation amplifier gain-setting network. Use Value: Draws only 50 µA quiescent current while delivering stable 2.0 V output, extending battery life beyond 12 months. |
| Industrial PLC Input Protection | Smart Home Smoke Detector MCU Bias |
Use Scenario: Overvoltage clamp on 24 V DC analog input channel exposed to field wiring transients. IC Role / Device Role / Timing Role: Reverse-biased Zener limiting input rail to 2.0 V during surge events, protecting downstream ADC. Use Value: Withstands non-repetitive 40 W peak power surges (tp = 100 µs), preventing latch-up in industrial-grade microcontrollers. |
Use Scenario: Stable supply rail for ultra-low-power ARM Cortex-M0+ MCU in battery-operated smoke alarm. IC Role / Device Role / Timing Role: Provides regulated 2.0 V auxiliary supply to internal LDO enable logic and RF transceiver bias. Use Value: Enables full system wake-from-sleep in <15 µs due to fast turn-on characteristics and minimal capacitance (220 pF). |
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-B2V0-Q | ±2 % tolerance, higher initial accuracy but no intentional leakage optimization | Better for precision reference; less suitable for noise-critical fast-switching circuits | Select when absolute voltage accuracy > noise immunity in signal path |
| MMSZ4678T1G | 2.0 V nominal, ±5 %, SOD-123 package, Rth(j-a) = 500 K/W, no AEC-Q101 qualification | Limited to commercial/industrial use; unsuitable for automotive deployment | Select only for cost-sensitive non-automotive designs with relaxed thermal and qualification requirements |
Compared with BZX38450-C2V0-Q, the BZX384-B2V0-Q offers tighter tolerance but lacks leakage tuning for noise reduction, while MMSZ4678T1G provides identical voltage rating but fails AEC-Q101 compliance and has inferior thermal performance - making the C-series optimal for automotive and noise-sensitive embedded regulation.
Availability
BZX38450-C2V0-Q is available at Aetrix Electronics and suitable for automotive body electronics, portable medical monitoring, industrial PLC analog inputs, and smart home safety devices requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX38450-C2V0-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 AEC-Q101-qualified Zener diode portfolio, designed specifically for low-current regulation in space-constrained, thermally demanding automotive and portable electronics.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX38450-C2V0-Q is specified for nominal 2.0 V Zener voltage at 50 µA test current, with guaranteed breakdown between 1.88 V and 2.12 V. Its absolute maximum non-repetitive peak reverse voltage is determined by the 40 W surge rating at 100 µs pulse width, not a fixed VR limit - sustained reverse bias must remain within the 2.0 V regulation band for proper operation.
Does this part require a series resistor in typical Zener regulator configurations?
Yes - a current-limiting resistor is mandatory to set the operating current within the 50 µA to 5 mA range specified in the datasheet. For example, with a 3.3 V supply and 2.0 V output, a 22 kΩ resistor delivers ~59 µA, aligning with the device's low-current optimization and ensuring stable regulation without exceeding 300 mW dissipation.
How does the "C" suffix differ from "B" in the BZX38450-Q series?
The "C" suffix denotes the ±5 % tolerance grade with intentionally elevated leakage current for improved noise suppression and faster switching response, whereas "B" indicates ±2 % tolerance and standard leakage. Both share identical package, power rating, and AEC-Q101 qualification - the choice depends on whether accuracy or noise performance is prioritized in the target application.
Can this diode be used in forward-bias mode as a standard rectifier?
No - the BZX38450-C2V0-Q is optimized for reverse-bias Zener operation. While it conducts forward current (VF = 0.9 V at 10 mA), its 250 mA absolute maximum forward current rating and lack of fast recovery design make it unsuitable for rectification. It should only be used as a shunt voltage reference or clamp in reverse bias.
BZX38450-C2V0-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):
- 2 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7 µA @ 1 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-C2V0-QF FAQ
1.How can I place an order for BZX38450-C2V0-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C2V0-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-C2V0-QF reliable?
The price and inventory of BZX38450-C2V0-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-C2V0-QF is usually 5 days.
3.What payment methods are accepted for BZX38450-C2V0-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C2V0-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C2V0-QF?
BZX38450-C2V0-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C2V0-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-C2V0-QF?
For technical support, including BZX38450-C2V0-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C2V0-QF requirements.
6.How does Aetrix verify that BZX38450-C2V0-QF is sourced from the original manufacturer or authorized distributors?
All BZX38450-C2V0-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-C2V0-QF meets industry standards.
7.What is the process for return or replacement of BZX38450-C2V0-QF?
All BZX38450-C2V0-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C2V0-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-C2V0-QF part is unused and in its original packaging.
Return procedure for BZX38450-C2V0-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C2V0-QF Tags
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