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Nexperia USA Inc. BZX38450-B13X
- Part No.:
- BZX38450-B13X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B13X.pdf
- Description:
- DIODE ZENER 13V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,422
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Product details
Overview
BZX38450-B13X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 13 V nominal working voltage at 50 µA test current, with ±2 % tolerance, 300 mW total power dissipation, and 9.8 Ω typical differential resistance at 5 mA. It serves as a precision reference or biasing element in ultra-low-power sensor interfaces and portable battery management circuits.
For engineers reviewing the BZX38450-B13X datasheet, BZX38450-B13X pinout, BZX38450-B13X application, or BZX38450-B13X equivalent, key selection criteria include its 13 V regulation accuracy at microamp-level test current, low leakage optimization for fast switching, thermal resistance of 415 K/W in free air, and compatibility with standard SOD323 reflow footprints.
Technical Context
This device operates as a reverse-biased Zener diode with a specified breakdown voltage of 12.7–13.3 V at IZ = 50 µA, exhibiting a temperature coefficient of +0.05 mV/K and differential resistance of ≤9.8 Ω at 5 mA. Its intentional minor leakage rise improves noise suppression and transient response in low-current bias networks.
The SOD323 package enables high-density PCB layout with 1.3 mm lead pitch and 1.7 × 1.25 × 0.95 mm body dimensions. Thermal performance is characterized by Rth(j-a) = 415 K/W (free air) and Rth(j-sp) = 110 K/W (to cathode solder point), supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 13 V at IZ = 50 µA - precise reference for low-bias analog sensing and MCU reset thresholds |
| Voltage Tolerance | ±2 % - tight regulation enables accurate voltage monitoring without trimming |
| Differential Resistance | ≤9.8 Ω at IZ = 5 mA - low dynamic impedance maintains stable output under small load variations |
| Forward Voltage | ≤0.9 V at IF = 10 mA - minimal forward drop during polarity-check or protection-mode conduction |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - sufficient headroom for intermittent regulation in space-constrained layouts |
| Junction Temperature Limit | 150 °C - supports operation in industrial ambient environments with passive cooling |
| Reverse Leakage | ≤0.05 µA at VR = 11 V - ultra-low standby current preserves battery life in always-on nodes |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2-terminal, 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, marking bar denotes cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; forms reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables use in nanoamp-level bias chains without loading error |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise and improves transient settling in feedback paths |
| Thermal robustness | Rth(j-sp) = 110 K/W to cathode solder point - enhances reliability under pulsed power conditions |
| High-density packaging | SOD323 footprint - fits 0.6 mm pad width and 1.15 mm pad length per IPC-7351B, enabling <1.5 mm² board area usage |
Applications
| Portable Gas Sensor Biasing | IoT Node Voltage Reference |
|---|---|
Use Scenario: Providing stable 13 V bias to electrochemical gas sensor elements in battery-powered air quality monitors. IC Role / Device Role / Timing Role: Zener regulator supplying fixed excitation voltage independent of Li-ion cell discharge curve (2.8–4.2 V). Use Value: ±2 % tolerance ensures consistent sensor sensitivity across 10-year field deployment without recalibration. |
Use Scenario: Generating precise reference for 12-bit ADC in BLE-enabled environmental sensor hubs. IC Role / Device Role / Timing Role: Low-leakage voltage reference source for ratiometric measurement against internal VREF. Use Value: 50 µA test current matches microcontroller's internal reference buffer drive capability, eliminating external op-amp stage. |
| Wearables Power-Rail Clamp | Industrial PLC Input Protection |
Use Scenario: Clamping 13 V supply rail in heartrate monitor modules to prevent overvoltage damage during wireless charging events. IC Role / Device Role / Timing Role: Shunt regulator absorbing surge energy while maintaining downstream logic integrity. Use Value: 40 W non-repetitive peak power rating handles 100 µs ESD transients without degradation. |
Use Scenario: Stabilizing 13 V auxiliary rail for optocoupler drivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring consistent LED forward current across -40 to +85 °C ambient range. Use Value: +0.05 mV/K temperature coefficient minimizes drift-induced timing jitter in isolation feedback loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38413-HE3-08 | Same 13 V nominal, ±2 %, but rated at 250 mW Ptot and higher rdiff (12 Ω) | Limited to lower-power biasing where thermal margin is constrained | Select when board-level thermal resistance exceeds 350 K/W and 300 mW headroom is unavailable |
| MMSZ4687T1G | 13 V nominal, ±5 % tolerance, 500 mW Ptot, but 30 Ω rdiff and no optimized leakage profile | Suitable for coarse regulation only; not recommended for precision analog sensing | Choose only for cost-sensitive, non-critical clamping where ±5 % voltage error is acceptable |
Compared with BZX38450-B13X, the BZX38413-HE3-08 trades 50 mW power margin for identical tolerance and tighter thermal footprint, while MMSZ4687T1G sacrifices regulation accuracy and noise performance for higher surge capacity-making BZX38450-B13X optimal for precision, low-power, low-noise applications.
Availability
BZX38450-B13X is available at Aetrix Electronics and suitable for portable medical sensors, IoT edge nodes, wearables power management, and industrial input conditioning requiring stable component supply across extended product lifecycles.
Supply support for BZX38450-B13X 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, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and sustainability.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-constrained and noise-sensitive applications where microamp-level regulation stability is critical.
FAQ
What is the maximum reverse voltage the BZX38450-B13X can withstand before breakdown?
The BZX38450-B13X has a nominal Zener voltage of 13 V, with guaranteed breakdown between 12.7 V and 13.3 V at 50 µA test current. Its absolute maximum reverse voltage is not defined separately-the device is designed to operate continuously in reverse breakdown within its specified power and thermal limits. Exceeding 300 mW dissipation or 150 °C junction temperature risks permanent damage.
Can BZX38450-B13X be used in forward-bias applications?
Yes-it exhibits a forward voltage of ≤0.9 V at 10 mA, making it usable as a low-drop rectifier or polarity indicator. However, its primary design intent is reverse-bias Zener regulation; forward conduction is characterized only for verification and protection contexts, not continuous power handling. Forward current must remain below 250 mA per limiting values.
How does the "intentional minor rise of leakage current" affect circuit performance?
This controlled leakage enhancement (per AN90031) reduces high-frequency noise and accelerates turn-off response in switching regulators and feedback loops. It does not increase steady-state power loss-leakage remains ≤0.05 µA at 11 V-and improves stability in high-impedance bias networks without compromising long-term reliability or regulation accuracy.
Is the SOD323 package compatible with standard reflow profiles?
Yes-the SOD323 footprint aligns with IPC-7351B Class B standards. Nexperia specifies a reflow soldering land pattern with 0.5 mm solder mask openings and 0.6 mm copper pads (Fig. 10). Peak temperature must not exceed 260 °C for ≤10 seconds, and thermal ramp rate should stay within 3 °C/s to avoid package cracking or delamination.
BZX38450-B13X 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):
- 13 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 9.8 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-B13X FAQ
1.How can I place an order for BZX38450-B13X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B13X 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-B13X reliable?
The price and inventory of BZX38450-B13X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B13X is usually 5 days.
3.What payment methods are accepted for BZX38450-B13X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B13X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B13X?
BZX38450-B13X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B13X 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-B13X?
For technical support, including BZX38450-B13X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B13X requirements.
6.How does Aetrix verify that BZX38450-B13X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B13X 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-B13X meets industry standards.
7.What is the process for return or replacement of BZX38450-B13X?
All BZX38450-B13X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B13X, 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-B13X part is unused and in its original packaging.
Return procedure for BZX38450-B13X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B13X Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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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
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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SMAZ12-13-F
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