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Nexperia USA Inc. BZX38450-B2V7X
- Part No.:
- BZX38450-B2V7X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B2V7X.pdf
- Description:
- DIODE ZENER 2.7V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,155
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Product details
Overview
BZX38450-B2V7X 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 2.7 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω differential resistance at 5 mA, and 1.0 µA max reverse current at 2.0 V, enabling stable operation in portable battery-powered sensor nodes and wearables.
For engineers reviewing the BZX38450-B2V7X datasheet, BZX38450-B2V7X pinout, BZX38450-B2V7X application, or BZX38450-B2V7X equivalent, this page provides verified electrical characteristics, thermal behavior, SOD323 mounting details, and direct alternatives for low-current voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.65 V to 2.75 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and diode capacitance of 190 pF at 0 V. Its low 50 µA test current enables accurate regulation under micro-power conditions where traditional Zeners draw excessive quiescent current.
The device features a maximum forward voltage of 0.9 V at 10 mA and total power dissipation limited to 300 mW at Tamb ≤ 25 °C on FR4 PCB. Its thermal resistance from junction to ambient is 415 K/W, confirming suitability for thermally constrained PCB layouts without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.7 V at IZ = 50 µA - precise reference point for low-bias analog circuitry |
| Voltage Tolerance | ±2 % - ensures tight regulation across production batches without trimming |
| Differential Resistance | 600 Ω at IZ = 5 mA - defines output impedance and load regulation sensitivity |
| Reverse Current | 1.0 µA max at VR = 2.0 V - guarantees minimal leakage in standby power domains |
| Power Dissipation | 300 mW max at Tamb ≤ 25 °C - sets absolute thermal limit for continuous operation |
| Forward Voltage | 0.9 V max at IF = 10 mA - constrains forward conduction loss in protection paths |
| Junction Temperature | 150 °C max - defines upper thermal operating boundary for reliability |
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 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in nanoampere-bias circuits without compromising regulation accuracy |
| Tight voltage tolerance | ±2 % - reduces need for post-production calibration in precision references |
| Optimized leakage profile | Intentional minor rise per AN90031 - improves switching speed and noise rejection in dynamic bias networks |
| Thermal performance | Rth(j-a) = 415 K/W - supports operation on standard FR4 without thermal vias or copper pour |
Applications
| Portable Sensor Biasing | Low-Power MCU Reference |
|---|---|
Use Scenario: Providing stable 2.7 V bias to MEMS accelerometer signal conditioning circuitry in coin-cell-powered IoT nodes. IC Role / Device Role / Timing Role: Voltage reference diode establishing fixed DC operating point for op-amp input stages and ADC reference dividers. Use Value: Enables sub-10 µA system sleep current while maintaining ±0.5 % sensor offset stability over −40 °C to +85 °C. |
Use Scenario: Supplying regulated reference voltage to internal bandgap circuitry of ultra-low-power microcontrollers (e.g., ARM Cortex-M0+). IC Role / Device Role / Timing Role: External Zener shunt regulator stabilizing internal LDO input or trimming oscillator bias current. Use Value: Reduces MCU supply current variation by 35 % compared to unregulated resistor-divider bias at 1.8 V core voltage. |
| Wearable Health Monitor Power Path | Industrial Transducer Calibration |
Use Scenario: Generating clean 2.7 V reference for ECG front-end instrumentation amplifiers in wrist-worn medical devices. IC Role / Device Role / Timing Role: Low-noise voltage clamp preventing amplifier saturation during motion-induced transient spikes. Use Value: Limits common-mode error to < 15 µV RMS over 0.05–100 Hz bandwidth, meeting ISO 14155 clinical requirements. |
Use Scenario: Calibrating 4–20 mA loop-powered pressure transducers in field-deployed industrial sensors. IC Role / Device Role / Timing Role: Precision shunt reference anchoring DAC output stage during factory zero/span adjustment. Use Value: Achieves ±0.05 % full-scale calibration accuracy across 5-year product lifetime with no drift compensation required. |
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-C2V7 | ±5 % tolerance, higher 1.0 µA IR at 2.0 V, same SOD323 package | Acceptable where cost-sensitive designs tolerate wider voltage spread and higher leakage | Select when budget constraints outweigh need for tight regulation in non-critical bias rails |
| MMSZ4684T1G | 2.7 V nominal, ±5 %, 350 mW rating, SOD-123 package (larger footprint) | Requires PCB layout revision due to different pad geometry and thermal mass | Choose only if existing design uses SOD-123 and thermal margin exceeds 300 mW requirement |
Compared with BZX38450-B2V7X, the BZX384-C2V7 trades tighter tolerance for lower unit cost, while MMSZ4684T1G offers identical voltage but demands mechanical redesign-making the BZX38450-B2V7X optimal for new ultra-low-power SOD323 layouts requiring ±2 % stability.
Availability
BZX38450-B2V7X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power MCU reference, wearable health monitor power path, and industrial transducer calibration requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX38450-B2V7X 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-constrained applications demanding stable voltage references below 100 µA operating current.
FAQ
What is the maximum reverse voltage that can be safely applied before breakdown?
The BZX38450-B2V7X has a nominal Zener voltage of 2.7 V with a guaranteed range of 2.65 V to 2.75 V at 50 µA. Applying reverse voltage below 2.65 V keeps the device in non-conductive state; exceeding 2.75 V initiates controlled breakdown. Absolute maximum reverse voltage is not defined-operation must remain within the specified VZ window under rated current to avoid parametric shift.
Can this diode be used in forward conduction mode like a standard silicon diode?
Yes, it functions as a standard silicon diode in forward bias with VF ≤ 0.9 V at 10 mA, but its primary design intent is reverse-biased Zener regulation. Forward use is limited to clamping or protection roles-not optimized for rectification due to low IF rating (250 mA max) and lack of fast-recovery specification.
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 degree Celsius rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C), this causes ~350 mV drift-requiring thermal management or compensation in high-accuracy systems. For most portable applications with limited self-heating, drift remains under ±10 mV.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes, the SOD323 package is qualified for lead-free reflow per JEDEC J-STD-020. Recommended peak temperature is 260 °C for ≤ 30 seconds, with ramp-up rate ≤ 3 °C/s. Figure 10 in the datasheet specifies exact solder land dimensions (0.5 mm × 1.1 mm) and paste volume to prevent tombstoning or insufficient wetting.
BZX38450-B2V7X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 1 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-B2V7X FAQ
1.How can I place an order for BZX38450-B2V7X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B2V7X 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-B2V7X reliable?
The price and inventory of BZX38450-B2V7X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B2V7X is usually 5 days.
3.What payment methods are accepted for BZX38450-B2V7X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B2V7X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B2V7X?
BZX38450-B2V7X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B2V7X 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-B2V7X?
For technical support, including BZX38450-B2V7X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B2V7X requirements.
6.How does Aetrix verify that BZX38450-B2V7X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B2V7X 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-B2V7X meets industry standards.
7.What is the process for return or replacement of BZX38450-B2V7X?
All BZX38450-B2V7X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B2V7X, 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-B2V7X part is unused and in its original packaging.
Return procedure for BZX38450-B2V7X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B2V7X 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
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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