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Nexperia USA Inc. BZX38450-C2V4X
- Part No.:
- BZX38450-C2V4X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C2V4X.pdf
- Description:
- DIODE ZENER 2.4V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BZX38450-C2V4X 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 2.4 V regulation at 50 µA test current, with ±2 % tolerance, 200 Ω differential resistance at 5 mA, and 1.0 µA reverse current at 1.0 V reverse bias - enabling stable operation in battery-powered sensor nodes and portable IoT endpoints.
For engineers reviewing the BZX38450-C2V4X datasheet, BZX38450-C2V4X pinout, BZX38450-C2V4X application, or BZX38450-C2V4X equivalent, this page provides verified electrical parameters, thermal behavior, SOD323 mounting guidance, and validated alternatives for low-current voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.28 V to 2.52 V at IZ = 50 µA. Its low 50 µA test current enables accurate regulation under micro-power conditions, while its −3.5 mV/K temperature coefficient ensures predictable drift across −55 °C to +150 °C ambient range.
The device exhibits 200 Ω dynamic impedance at 5 mA, 0.9 V forward voltage at 10 mA, and 300 mW total power dissipation on FR4 PCB. Its 220 pF capacitance at 0 V and 1.0 µA leakage at VR = 1.0 V support noise-sensitive analog front-ends and low-frequency reference buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.4 V at IZ = 50 µA - sets precise low-voltage reference point for ADC bias or LDO feedback |
| Voltage Tolerance | ±2 % - ensures tight regulation without post-production trimming in production-grade designs |
| Differential Resistance | 200 Ω at IZ = 5 mA - limits output impedance impact on load regulation stability |
| Reverse Current | 1.0 µA at VR = 1.0 V - enables use in high-impedance sensing paths without signal loading |
| Forward Voltage | 0.9 V at IF = 10 mA - defines conduction threshold when used in polarity protection or clamping |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous operation in compact SOD323 footprint with standard FR4 layout |
| Junction-to-Ambient Rth | 415 K/W - informs thermal rise under sustained bias; requires minimal copper area for <10 °C rise at 100 µW |
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 top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage node; marking bar identifies this terminal for correct PCB orientation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in µA-level supply rails common in RTCs and wake-up circuits |
| Controlled leakage profile | 1.0 µA at 1.0 V reverse bias - minimizes standby current in always-on monitoring systems |
| Optimized switching noise | Intentional minor leakage rise per AN90031 - reduces transient ringing during fast turn-on in digital reference paths |
| Thermal robustness | 150 °C max junction temperature - supports deployment in industrial edge nodes with uncontrolled ambient profiles |
Applications
| Portable Sensor Biasing | RTC Voltage Reference |
|---|---|
Use Scenario: Providing stable 2.4 V bias to MEMS accelerometer analog front-end in coin-cell-powered wearable. IC Role / Device Role / Timing Role: Zener voltage reference establishing ADC input range and amplifier offset point. Use Value: ±2 % tolerance and 200 Ω dynamic impedance ensure consistent sensor gain calibration across 10-year battery life. |
Use Scenario: Supplying precision reference to real-time clock IC in energy-harvesting wireless node. IC Role / Device Role / Timing Role: Low-current Zener regulator maintaining oscillator bias voltage independent of battery decay. Use Value: 50 µA test current and −3.5 mV/K tempco enable sub-second timekeeping accuracy over −20 °C to +70 °C. |
| IoT Node Power Sequencing | Low-Power Comparator Threshold |
Use Scenario: Generating enable threshold for buck converter in NB-IoT modem sleep/wake control circuit. IC Role / Device Role / Timing Role: Voltage reference defining hysteresis window for power-good detection. Use Value: 1.0 µA leakage at 1.0 V prevents false triggering during deep-sleep states with 3.3 V rail decay. |
Use Scenario: Setting trip point for battery voltage monitor comparator in Bluetooth LE beacon. IC Role / Device Role / Timing Role: Precision Zener defining 2.4 V under-voltage lockout threshold. Use Value: Tight ±2 % tolerance eliminates need for external resistor divider trimming in high-volume production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-current Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B2V4 | Same SOD323 package, ±5 % tolerance, 600 Ω rdiff at 5 mA | Higher impedance and looser tolerance limit use in precision ADC references | Select when cost sensitivity outweighs regulation accuracy and dynamic response requirements |
| MMSZ4684T1G | 2.4 V ±5 %, 1000 Ω rdiff, 500 mW Ptot, SOD-123 package | Larger footprint and higher thermal resistance reduce suitability for ultra-dense layouts | Choose only if board space allows SOD-123 and higher power margin is needed for transient surges |
Compared with BZX38450-C2V4X, BZX384-B2V4 trades regulation precision for cost, while MMSZ4684T1G sacrifices miniaturization for higher surge handling - making the C2V4X optimal for space-constrained, battery-operated systems demanding tight voltage fidelity.
Availability
BZX38450-C2V4X is available at Aetrix Electronics and suitable for portable sensor biasing, RTC voltage reference, and low-power comparator threshold applications requiring stable component supply across multi-year production cycles.
Supply support for BZX38450-C2V4X 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 logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for voltage reference and biasing in energy-constrained portable and IoT devices.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX38450-C2V4X has a nominal Zener voltage of 2.4 V, with guaranteed breakdown occurring between 2.28 V and 2.52 V at 50 µA test current. It is not rated for reverse blocking above its specified VZ; operation beyond 2.52 V risks exceeding absolute maximum ratings and thermal runaway.
Can this Zener be used in forward conduction mode?
Yes - it functions as a standard silicon diode in forward bias, with 0.9 V typical forward voltage at 10 mA. However, its primary design intent is reverse-bias regulation; forward use is limited to clamping or polarity protection where 0.9 V drop is acceptable.
How does the −3.5 mV/K temperature coefficient affect long-term stability?
A −3.5 mV/K coefficient means output voltage decreases by 3.5 mV per Kelvin rise in junction temperature. Over a 100 °C range (−25 °C to +75 °C), this yields ~350 mV drift - compensated in precision systems via calibration or complementary circuitry, but acceptable for non-critical biasing.
Is this part suitable for automotive applications?
No - the BZX38450-C2V4X is not AEC-Q200 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products are unsuitable for safety-critical or automotive use, and no automotive testing or qualification data is provided for this device.
BZX38450-C2V4X 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):
- 2.4 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 2 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-C2V4X FAQ
1.How can I place an order for BZX38450-C2V4X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C2V4X 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-C2V4X reliable?
The price and inventory of BZX38450-C2V4X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C2V4X is usually 5 days.
3.What payment methods are accepted for BZX38450-C2V4X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C2V4X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C2V4X?
BZX38450-C2V4X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C2V4X 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-C2V4X?
For technical support, including BZX38450-C2V4X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C2V4X requirements.
6.How does Aetrix verify that BZX38450-C2V4X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C2V4X 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-C2V4X meets industry standards.
7.What is the process for return or replacement of BZX38450-C2V4X?
All BZX38450-C2V4X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C2V4X, 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-C2V4X part is unused and in its original packaging.
Return procedure for BZX38450-C2V4X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C2V4X Tags
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MM5Z5V1ST1G
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