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Nexperia USA Inc. BZX38450-C2V2X
- Part No.:
- BZX38450-C2V2X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C2V2X.pdf
- Description:
- DIODE ZENER 2.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:26,335
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Product details
Overview
BZX38450-C2V2X 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 2.2 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω differential resistance at 5 mA, and 4 µA max reverse current at rated voltage - ideal for battery-powered sensor nodes and portable MCU reset circuits.
For engineers reviewing the BZX38450-C2V2X datasheet, BZX38450-C2V2X pinout, BZX38450-C2V2X application, or BZX38450-C2V2X equivalent, key selection criteria include its low 50 µA regulation current, tight ±2 % tolerance, SOD323 footprint compatibility, and specified thermal resistance of 415 K/W in free air - critical for space-constrained, thermally sensitive designs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output by conducting reverse current above its specified Zener voltage (2.2 V). Its regulation is characterized at IZ = 50 µA, enabling operation in micro-power domains where traditional regulators draw excessive quiescent current.
The BZX38450-C2V2X exhibits a negative temperature coefficient of −3.5 mV/K and diode capacitance of 210 pF at 0 V, supporting stable DC reference generation while limiting high-frequency noise coupling. Its 300 mW total power dissipation rating applies under FR4 PCB mounting conditions with single-sided copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.09 V to 2.31 V at IZ = 50 µA - ensures precise 2.2 V reference with ±2 % tolerance for analog sensing and ADC reference stability |
| Differential Resistance (rdiff) | 600 Ω max at IZ = 5 mA - defines regulation stiffness; lower values improve load regulation but increase sensitivity to current variation |
| Reverse Current (IR) | 4 µA max at VR = 2.0 V - enables ultra-low standby leakage in always-on monitoring circuits |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - supports use as low-drop rectifier or ESD clamp in signal path protection |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous power budget for thermal design in compact layouts |
| Junction-to-Ambient Rth | 415 K/W in free air - determines temperature rise per watt; critical for derating in sealed enclosures without airflow |
| Package | SOD323 (SC-76), 1.7 mm × 1.25 mm × 0.95 mm - surface-mount footprint compatible with 0603 reflow profiles and automated assembly |
Pinout & Package
SOD323 (SC-76) plastic surface-mount package with 2 leads, 1.3 mm pitch, and cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity must be observed to enable Zener conduction in reverse bias |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt regulation path when input exceeds VZ |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - enables stable reference generation in nanoamp-level supply rails, e.g., RTC backup circuits |
| Tight voltage tolerance | ±2 % (C-series) - reduces calibration overhead in precision analog front-ends and sensor excitation networks |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - improves switching speed and reduces noise in dynamic reference applications |
| Thermal robustness | 150 °C max junction temperature - supports operation in industrial ambient environments without active cooling |
| Standardized marking | Marking code "6T" per Table 4 - enables visual identification and traceability during manual inspection and rework |
Applications
| Portable Sensor Biasing | MCU Reset Reference |
|---|---|
Use Scenario: Providing stable 2.2 V bias to MEMS pressure sensor bridge in wearable health monitor. IC Role / Device Role / Timing Role: Shunt voltage reference establishing excitation voltage for Wheatstone bridge. Use Value: ±2 % tolerance ensures <0.5 % full-scale error in sensor output; 50 µA regulation current extends coin-cell life beyond 5 years. |
Use Scenario: Generating clean reset threshold for ultra-low-power ARM Cortex-M0+ microcontroller in smart meter. IC Role / Device Role / Timing Role: Precision Zener element in RC-based reset circuit defining brown-out detection level. Use Value: 4 µA max reverse leakage prevents false resets during deep-sleep modes; SOD323 footprint saves board area in multi-layer meter PCB. |
| IoT Node Voltage Clamp | Low-Power ADC Reference |
Use Scenario: Clamping 3.3 V supply rail against transient overvoltage in LoRaWAN end-node. IC Role / Device Role / Timing Role: Transient voltage suppressor operating in Zener breakdown during surge events. Use Value: 40 W non-repetitive peak power rating (100 µs pulse) absorbs ESD strikes without degradation; 210 pF capacitance avoids signal integrity issues on 10 kbps UART lines. |
Use Scenario: Supplying reference voltage to 12-bit SAR ADC in battery-operated environmental logger. IC Role / Device Role / Timing Role: Low-noise DC reference source replacing higher-quiescent LDO for improved PSRR. Use Value: −3.5 mV/K tempco enables software compensation; 600 Ω rdiff limits reference droop under 100 µA ADC input current, preserving ENOB. |
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-B2V2 | ±5 % tolerance, same 2.2 V nominal, 600 Ω rdiff, but no intentional leakage optimization | Lacks AN90031 noise-reduction tuning; suitable only for static reference, not fast-switching circuits | Select when cost sensitivity outweighs noise performance and tighter tolerance is unnecessary |
| MMSZ4678T1G | 2.2 V nominal, ±5 %, 600 Ω rdiff, SOD-123 package (larger: 2.9 mm × 1.3 mm), 500 mW Ptot | Higher power rating but 3× larger footprint; thermal resistance 300 K/W vs. 415 K/W - less efficient in confined spaces | Choose only if board layout allows SOD-123 and higher dissipation margin is required |
Compared with BZX38450-C2V2X, the BZX384-B2V2 sacrifices tolerance and noise performance for lower cost, while MMSZ4678T1G trades miniaturization for thermal headroom - making the C2V2X optimal for size- and noise-critical portable designs requiring ±2 % accuracy.
Availability
BZX38450-C2V2X is available at Aetrix Electronics and suitable for portable sensor biasing, MCU reset reference, and low-power ADC reference applications requiring stable component supply across production lifecycles.
Supply support for BZX38450-C2V2X 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-grade qualification.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-constrained and space-limited applications demanding sub-100 µA regulation and ±2 % voltage accuracy.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-C2V2X?
The device begins regulating at its nominal Zener voltage of 2.2 V, with guaranteed breakdown between 2.09 V and 2.31 V at 50 µA test current. It does not have a distinct "maximum reverse voltage" limit prior to breakdown - instead, it enters controlled conduction once reverse bias exceeds VZ. Absolute maximum reverse voltage is not specified; operation above VZ is its intended function.
Can BZX38450-C2V2X be used in series for higher reference voltages?
No - this device is not characterized or guaranteed for series operation. Its differential resistance (600 Ω) and temperature coefficient (−3.5 mV/K) are specified individually. Cascading Zeners introduces mismatched tolerances, compounded tempcos, and uncontrolled current sharing, violating its qualified operating conditions per IEC 60134.
Is the 50 µA test current the only recommended operating point?
No - the device functions across 5 µA to 250 mA forward/reverse current range, but regulation accuracy and rdiff are specified at 50 µA (for VZ) and 5 mA (for rdiff). Operating below 50 µA increases VZ uncertainty; above 5 mA improves regulation stiffness but raises self-heating - design must balance accuracy, power, and thermal constraints.
Does the "C" in BZX38450-C2V2X indicate automotive qualification?
No - the "C" denotes the ±2 % tolerance grade within the BZX38450 series. This part is not AEC-Q200 qualified. Nexperia explicitly states in Section 14 that non-automotive qualified products are unsuitable for automotive use unless expressly stated; no such statement appears in the BZX38450_SER datasheet Rev. 4.
BZX38450-C2V2X 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):
- 2.2 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 4 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-C2V2X FAQ
1.How can I place an order for BZX38450-C2V2X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C2V2X 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-C2V2X reliable?
The price and inventory of BZX38450-C2V2X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C2V2X is usually 5 days.
3.What payment methods are accepted for BZX38450-C2V2X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C2V2X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C2V2X?
BZX38450-C2V2X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C2V2X 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-C2V2X?
For technical support, including BZX38450-C2V2X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C2V2X requirements.
6.How does Aetrix verify that BZX38450-C2V2X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C2V2X 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-C2V2X meets industry standards.
7.What is the process for return or replacement of BZX38450-C2V2X?
All BZX38450-C2V2X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C2V2X, 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-C2V2X part is unused and in its original packaging.
Return procedure for BZX38450-C2V2X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C2V2X 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
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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