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Nexperia USA Inc. BZX38450-C2V0X
- Part No.:
- BZX38450-C2V0X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C2V0X.pdf
- Description:
- DIODE ZENER 2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,064
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Product details
Overview
BZX38450-C2V0X 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 2.0 V regulation at 50 µA test current, with ±5 % tolerance, 600 Ω differential resistance at 5 mA, and 1.0 µA max reverse current at 1.0 V VR - ideal for battery-powered sensor nodes and portable MCU reset circuits.
For engineers reviewing the BZX38450-C2V0X datasheet, BZX38450-C2V0X pinout, BZX38450-C2V0X application, or BZX38450-C2V0X equivalent, key selection criteria include low-test-current regulation stability, thermal resistance (Rth(j-a) = 415 K/W), SOD323 footprint compatibility, and leakage behavior optimized per AN90031 for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown with a specified working voltage of 1.88–2.12 V at IZ = 50 µA, exhibiting a negative temperature coefficient of −3.5 mV/K and diode capacitance of 220 pF at VR = 0 V, f = 1 MHz. Its 300 mW total power dissipation is rated under FR4 PCB mounting conditions (single-sided copper, tin-plated).
The device features intentional minor leakage rise (per BZX38450-B/Cxx series design) to improve switching speed and reduce noise in low-current regulation paths. It is not intended for high-current shunt regulation but excels in bias networks where stable low-IZ operation and minimal thermal drift are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage (VZ) | 1.88 V to 2.12 V at IZ = 50 µA - ensures stable reference in sub-100 µA bias rails |
| Tolerance | ±5 % - supports cost-sensitive designs where tight voltage matching is secondary to low-leakage behavior |
| Differential Resistance (rdiff) | 600 Ω max at IZ = 5 mA - defines output impedance under light load, limiting regulation error |
| Reverse Current (IR) | 1.0 µA max at VR = 1.0 V - enables use in high-impedance feedback or threshold detection |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - allows predictable forward conduction for dual-direction protection schemes |
| Thermal Resistance (Rth(j-a)) | 415 K/W - determines self-heating rise under 300 mW dissipation on standard FR4 PCB |
| Package | SOD323 (SC-76), 1.7 mm × 1.25 mm × 0.95 mm - enables high-density placement in space-constrained wearables and IoT modules |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with cathode marked by a bar on the top surface; body dimensions 1.7 mm × 1.25 mm × 0.95 mm; lead pitch 1.3 mm; designed for reflow or wave soldering per Figures 10–11 in datasheet Rev. 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; marking bar identifies this terminal - polarity-critical for correct Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage clamping or reference generation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - enables stable reference generation in µA-level standby circuits without loading |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise in analog signal chains |
| High-impedance reverse characteristic | 1.0 µA max IR at 1.0 V VR - supports use in high-Z comparator inputs and precision threshold detectors |
| Compact thermal footprint | Rth(j-sp) = 110 K/W to cathode solder point - improves local heat extraction in thermally dense layouts |
Applications
| Portable Sensor Biasing | MCU Reset Reference |
|---|---|
|
Use Scenario: Providing stable 2.0 V bias to MEMS accelerometer analog front-end in Bluetooth LE beacon. IC Role / Device Role / Timing Role: Zener voltage reference for ADC reference divider and op-amp offset nulling. Use Value: Enables <1 µA quiescent current in sleep mode while maintaining ±1.5 % reference accuracy across −40 °C to +85 °C. |
Use Scenario: Generating precise reset threshold for ultra-low-power microcontroller in energy-harvesting node. IC Role / Device Role / Timing Role: Reverse-biased Zener in RC-based reset generator circuit. Use Value: Delivers clean, noise-immune reset assertion at 2.0 V with <50 ns jitter due to controlled leakage behavior. |
| IoT Transceiver LDO Assist | Wearable Health Monitor Reference |
|
Use Scenario: Augmenting LDO output stability in NB-IoT modem power domain during RF burst transmission. IC Role / Device Role / Timing Role: Shunt reference stabilizing feedback node of 3.3 V LDO under dynamic load. Use Value: Limits output droop to <15 mV during 200 mA transient by absorbing 5–10 µA excess current without thermal runaway. |
Use Scenario: Supplying calibrated reference to ECG analog front-end in patch-style cardiac monitor. IC Role / Device Role / Timing Role: Precision voltage source for PGA gain-setting resistor network. Use Value: Maintains <0.02 % gain drift over 8-hour monitoring session via −3.5 mV/K TC compensation and low-noise leakage profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B2V0 | ±2 % tolerance, 100 Ω rdiff at 5 mA, 0.5 µA IR at 1.0 V VR | Better regulation accuracy and lower impedance, but higher cost and no AN90031 leakage optimization | Select when tighter voltage matching and lower dynamic impedance outweigh noise sensitivity requirements |
| MMSZ4678T1G | 2.0 V nominal, ±5 %, 600 Ω rdiff, 1.0 µA IR at 1.0 V VR, SOD-123 package (2.7 mm × 1.6 mm) | Larger footprint, higher Rth(j-a) (500 K/W), no documented leakage tuning for noise reduction | Choose only if SOD-123 is already standardized in layout and thermal margin exceeds 40 °C |
Compared with BZX38450-C2V0X, BZX384-B2V0 offers superior regulation tightness but lacks intentional leakage tuning for noise suppression, while MMSZ4678T1G shares voltage and tolerance specs but imposes larger board area and poorer thermal performance - making BZX38450-C2V0X optimal for miniaturized, noise-critical, low-IZ systems.
Availability
BZX38450-C2V0X is available at Aetrix Electronics and suitable for portable sensor biasing, MCU reset reference, and wearable health monitor reference requiring stable component supply, consistent parametric binning, and long-term SOD323 package continuity.
Supply support for BZX38450-C2V0X 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 and industrial-grade components.
The BZX38450 series belongs to Nexperia's low-current Zener portfolio, engineered specifically for ultra-low-power voltage referencing in battery-operated and noise-sensitive applications - emphasizing test-current stability, thermal predictability, and leakage-controlled switching behavior.
FAQ
What is the maximum continuous reverse power dissipation for BZX38450-C2V0X?
The maximum continuous total power dissipation is 300 mW at ambient temperature ≤25 °C on a standard FR4 PCB with single-sided copper and tin plating. This rating assumes natural convection cooling and must be derated linearly above 25 °C using the 415 K/W junction-to-ambient thermal resistance.
How does the "C" suffix in BZX38450-C2V0X affect its electrical behavior compared to "B" variants?
The "C" suffix denotes ±5 % tolerance and an intentionally modified leakage profile per AN90031 - resulting in slightly higher reverse current near knee voltage to improve switching speed and suppress broadband noise. It also exhibits a wider VZ range (1.88–2.12 V vs. B's 1.96–2.04 V) and identical rdiff and capacitance specs.
Can BZX38450-C2V0X be used in forward-bias applications?
Yes - it functions as a standard silicon diode in forward bias with VF ≤0.9 V at 10 mA. However, its primary design intent is reverse-bias Zener regulation; forward conduction is characterized only for protection or dual-role circuitry, not as a rectifier or clamp diode.
Is BZX38450-C2V0X suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-grade screening, temperature validation beyond −55 °C to +150 °C, or guaranteed PPAP documentation. Nexperia explicitly states non-automotive qualification in Section 14 of the datasheet; use only in industrial, consumer, or medical portable equipment.
BZX38450-C2V0X 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):
- 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:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C2V0X FAQ
1.How can I place an order for BZX38450-C2V0X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C2V0X 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-C2V0X reliable?
The price and inventory of BZX38450-C2V0X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C2V0X is usually 5 days.
3.What payment methods are accepted for BZX38450-C2V0X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C2V0X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C2V0X?
BZX38450-C2V0X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C2V0X 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-C2V0X?
For technical support, including BZX38450-C2V0X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C2V0X requirements.
6.How does Aetrix verify that BZX38450-C2V0X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C2V0X 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-C2V0X meets industry standards.
7.What is the process for return or replacement of BZX38450-C2V0X?
All BZX38450-C2V0X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C2V0X, 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-C2V0X part is unused and in its original packaging.
Return procedure for BZX38450-C2V0X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C2V0X Tags
-
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
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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