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Nexperia USA Inc. BZX38450-C3V0X
- Part No.:
- BZX38450-C3V0X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C3V0X.pdf
- Description:
- DIODE ZENER 3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,563
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Product details
Overview
BZX38450-C3V0X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 3.0 V regulation at 50 µA test current, with ±2 % tolerance, 170 pF capacitance at 0 V, and 0.8 µA max reverse leakage at VR = 3.0 V - enabling stable operation in portable battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX38450-C3V0X datasheet, BZX38450-C3V0X pinout, BZX38450-C3V0X application, or BZX38450-C3V0X equivalent, key selection criteria include its 50 µA regulation point, low thermal resistance (110 K/W to solder point), ±2 % voltage tolerance, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.85 V to 3.15 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance ≤600 Ω at IZ = 5 mA. Its low 50 µA test current enables accurate regulation in micropower systems where quiescent current must remain below 1 µA.
The device features intentionally elevated reverse leakage (0.8 µA max at VR = 3.0 V) per AN90031 to improve switching speed and reduce high-frequency noise - a design trade-off distinct from standard B-series variants, making it suitable for dynamic reference stabilization in ADC bias networks and LDO feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V at IZ = 50 µA - sets precise low-power reference point for 3.3 V rail monitoring |
| Voltage Tolerance | ±2 % - ensures tight regulation without post-calibration in production sensor modules |
| Reverse Leakage | 0.8 µA max at VR = 3.0 V - optimized per AN90031 for faster transient response and lower noise |
| Diode Capacitance | 170 pF at f = 1 MHz, VR = 0 V - limits high-frequency coupling in RF-adjacent analog signal chains |
| Forward Voltage | 0.9 V max at IF = 10 mA - defines minimal headroom loss when used in series bias configurations |
| Power Dissipation | 300 mW max at Tamb ≤ 25 °C - supports continuous operation in compact PCB layouts with minimal copper area |
| Junction-to-Solder-Point Rth | 110 K/W - enables reliable thermal management on FR4 with single-sided copper and standard footprint |
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 identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity critical for correct Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables use in sub-1 µA standby circuits without regulation drift |
| Optimized leakage profile | Intentional 0.8 µA max IR at VR = 3.0 V - reduces switching noise in precision ADC references |
| Tight voltage tolerance | ±2 % over temperature - eliminates need for trimming resistors in factory-calibrated IoT endpoints |
| Miniature SMD package | SOD323 footprint - fits within 1.7 mm × 1.25 mm area, compatible with 0402-class routing density |
| Thermal performance | Rth(j-sp) = 110 K/W - allows direct thermal coupling to PCB copper for stable voltage reference under load transients |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Powering MEMS accelerometer bias network in BLE beacon with coin-cell supply. IC Role / Device Role / Timing Role: Zener reference providing stable 3.0 V node for analog sensor excitation and ADC reference divider. Use Value: 50 µA regulation current matches ultra-low-quiescent LDO output, minimizing battery drain while maintaining ±2 % accuracy across −40 °C to +85 °C. |
Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ MCU in industrial data logger. IC Role / Device Role / Timing Role: Voltage reference input to dedicated reset supervisor IC (e.g., MAX809). Use Value: Optimized leakage (0.8 µA) prevents false resets during brown-out recovery; 170 pF capacitance suppresses ESD-induced glitches on reset line. |
| Low-Power ADC Reference Divider | RF Front-End Bias Stabilization |
|
Use Scenario: Scaling 3.3 V supply to 3.0 V reference for 16-bit SAR ADC in wireless metering module. IC Role / Device Role / Timing Role: Precision shunt regulator establishing low-noise reference voltage for resistor-divider network. Use Value: −3.5 mV/K tempco and 600 Ω rdiff ensure <0.5 LSB error over full operating range; SOD323 placement minimizes trace inductance near ADC REF pin. |
Use Scenario: Stabilizing gate bias for GaN HEMT driver in sub-GHz ISM band transmitter. IC Role / Device Role / Timing Role: Low-capacitance (170 pF) Zener clamping bias rail against RF coupling and supply ripple. Use Value: 110 K/W junction-to-solder-point thermal resistance maintains stable bias point during 100 ms TX bursts; SOD323 size avoids parasitic resonance near 915 MHz. |
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-B3V0 | Same 3.0 V nominal, but ±5 % tolerance and lower leakage (0.5 µA max) | Lacks AN90031 leakage optimization; higher voltage uncertainty impacts precision ADC references | Select only when cost sensitivity outweighs regulation accuracy and noise performance |
| MMSZ4684T1G | 3.0 V nominal, ±5 %, 350 mW Ptot, SOD-123 package (2.7 mm × 1.6 mm) | Larger footprint and higher rdiff (1000 Ω) degrade stability in fast-transient sensor interfaces | Use only if legacy board layout requires SOD-123 or higher power margin is mandatory |
Compared with BZX38450-B3V0 and MMSZ4684T1G, the BZX38450-C3V0X provides tighter voltage control (±2 % vs. ±5 %), purpose-built leakage for noise reduction, and superior thermal coupling in space-constrained designs - making it optimal for next-generation ultra-low-power sensing and mixed-signal systems.
Availability
BZX38450-C3V0X is available at Aetrix Electronics and suitable for portable sensor nodes, microcontroller reset circuits, low-power ADC references, and RF bias stabilization requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-C3V0X 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 advanced packaging and automotive-qualified components.
The BZX38450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for micropower voltage reference and biasing in battery-operated IoT endpoints and space-constrained industrial sensors.
FAQ
What is the maximum reverse current at 3.0 V for BZX38450-C3V0X?
The maximum reverse current (IR) at VR = 3.0 V is 0.8 µA, as specified in Table 8 of the Rev. 4 datasheet. This value reflects the intentional leakage optimization per AN90031 for improved switching behavior and noise reduction - not a defect, but a design feature distinguishing the 'C' series from standard 'B' variants.
Can BZX38450-C3V0X be used in place of a standard 3.3 V Zener diode?
No - BZX38450-C3V0X is rated at 3.0 V nominal (2.85–3.15 V), not 3.3 V. Substituting it for a 3.3 V Zener would cause undervoltage in circuits relying on that exact threshold, such as certain supervisor ICs or level-shifted interfaces. Always verify target voltage match before replacement.
Does this diode require a series resistor in all applications?
Yes - like all Zener diodes, BZX38450-C3V0X requires an external current-limiting resistor to set the operating current (IZ) within its specified range (50 µA typical). The resistor value must be calculated based on supply voltage, desired IZ, and the diode's dynamic resistance to maintain regulation accuracy and avoid exceeding 300 mW dissipation.
Is the SOD323 package compatible with standard reflow profiles?
Yes - the SOD323 package is qualified for lead-free reflow soldering per JEDEC J-STD-020. Figure 10 in the datasheet provides the recommended solder land pattern (0.6 mm × 0.5 mm pads, 1.35 mm center-to-center), and the device supports peak temperatures up to 260 °C for ≤30 seconds, matching IPC-A-610 Class 2/3 requirements.
BZX38450-C3V0X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 800 nA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C3V0X FAQ
1.How can I place an order for BZX38450-C3V0X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C3V0X 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-C3V0X reliable?
The price and inventory of BZX38450-C3V0X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C3V0X is usually 5 days.
3.What payment methods are accepted for BZX38450-C3V0X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C3V0X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C3V0X?
BZX38450-C3V0X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C3V0X 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-C3V0X?
For technical support, including BZX38450-C3V0X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C3V0X requirements.
6.How does Aetrix verify that BZX38450-C3V0X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C3V0X 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-C3V0X meets industry standards.
7.What is the process for return or replacement of BZX38450-C3V0X?
All BZX38450-C3V0X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C3V0X, 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-C3V0X part is unused and in its original packaging.
Return procedure for BZX38450-C3V0X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C3V0X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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