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Nexperia USA Inc. BZX38450-B13-QX
- Part No.:
- BZX38450-B13-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B13-QX.pdf
- Description:
- DIODE ZENER 13V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,771
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Product details
Overview
BZX38450-B13-QX 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 AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-B13-QX datasheet, BZX38450-B13-QX pinout, BZX38450-B13-QX application, or BZX38450-B13-QX equivalent, this device is selected for precision low-bias voltage reference, battery-powered sensor biasing, and automotive ECU voltage clamping where tight tolerance and low leakage are critical.
Technical Context
This Zener diode operates in reverse breakdown with specified VZ = 12.7–13.3 V at IZ = 50 µA, exhibiting differential resistance ≤170 Ω at IZ = 5 mA and temperature coefficient of +0.05 mV/K. Its low test current enables stable regulation in micro-power circuits.
The device features intentional minor leakage rise per AN90031 to improve switching speed and reduce noise, and is qualified to AEC-Q101 with junction temperature rating up to 150 °C - confirming suitability for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 13 V at IZ = 50 µA - defines precise regulation point for low-current bias networks |
| Voltage Tolerance | ±2 % - ensures tight output stability across production lots without post-assembly trimming |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous operation in compact SOD323 footprint on FR4 PCB |
| Differential Resistance | ≤170 Ω at IZ = 5 mA - maintains low dynamic impedance for stable regulation under small load variations |
| Forward Voltage | ≤0.9 V at IF = 10 mA - enables predictable forward conduction during transient overvoltage events |
| Junction Temperature | −55 °C to +150 °C - validated for extended automotive thermal cycling and under-hood deployment |
| AEC-Q101 Qualified | Yes - certified for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package; 2 leads; 1.3 mm pitch; 1.7 mm × 1.25 mm × 0.95 mm body; 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 for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - minimizes quiescent current draw in battery-critical applications like key fobs and tire pressure sensors |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and high-frequency noise in signal conditioning paths |
| Automotive qualification | AEC-Q101 compliant - guarantees reliability for engine control units, body electronics, and ADAS power rails |
| Tight voltage tolerance | ±2 % (B-series) - eliminates need for binning or external trimming in precision reference designs |
| Thermal robustness | Rth(j-a) = 415 K/W - enables stable regulation without heatsinking in space-constrained automotive modules |
Applications
| Automotive ECU Power Rail Clamping | Portable Sensor Bias Reference |
|---|---|
Use Scenario: Protecting 13 V supply lines in engine control units against load dump transients and alternator ripple. IC Role / Device Role / Timing Role: Zener clamp providing fast-acting overvoltage protection and stable reference for LDO feedback networks. Use Value: ±2 % VZ tolerance ensures consistent clamping threshold across temperature, reducing design margin overhead. |
Use Scenario: Providing stable 13 V bias to MEMS pressure sensors in wireless tire monitoring systems. IC Role / Device Role / Timing Role: Low-current voltage reference enabling microamp-level standby operation and accurate ADC scaling. Use Value: 50 µA test current specification matches ultra-low-power sensor bias requirements without compromising regulation accuracy. |
| Industrial PLC Input Protection | Medical Wearable Signal Conditioning |
Use Scenario: Safeguarding 13 V analog input channels in programmable logic controllers against field-induced surges. IC Role / Device Role / Timing Role: Reverse-biased Zener shunt limiting input voltage swing while maintaining high-impedance sensing path. Use Value: 170 Ω differential resistance ensures minimal loading effect on precision op-amp front-ends during clamping. |
Use Scenario: Stabilizing reference voltage for low-noise instrumentation amplifiers in ECG patch devices. IC Role / Device Role / Timing Role: Noise-optimized Zener element suppressing supply ripple in analog signal chains. Use Value: Intentional leakage profile per AN90031 reduces broadband noise coupling into sensitive biopotential measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38413-B-Q | Same 13 V nominal, ±2 %, but rated for 500 mW Ptot and larger SOD123 package | Higher power handling suits industrial mains-connected regulators; not AEC-Q101 qualified | Select when board layout allows larger footprint and automotive qualification is unnecessary |
| MMSZ4687T1G | 13 V, ±5 %, 500 mW, SOD-123, no AEC-Q101 qualification | Looser tolerance and unqualified status limit use to non-automotive consumer or industrial applications | Choose only for cost-sensitive, non-automotive designs where ±5 % VZ is acceptable |
Compared with BZX38450-B13-QX, BZX38413-B-Q offers higher power but lacks automotive qualification and uses a larger package, while MMSZ4687T1G trades tolerance and qualification for cost - making the BZX38450-B13-QX optimal for space-constrained, AEC-compliant 13 V reference needs.
Availability
BZX38450-B13-QX is available at Aetrix Electronics and suitable for automotive ECU design, portable medical sensor biasing, and industrial PLC input protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX38450-B13-QX 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 automotive-grade quality.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage regulation in automotive and portable electronics where size, precision, and reliability are critical.
FAQ
What is the exact Zener voltage range for BZX38450-B13-QX at 50 µA?
The BZX38450-B13-QX has a guaranteed Zener voltage range of 12.7 V to 13.3 V when measured at IZ = 50 µA and Tj = 25 °C, per Table 8 of the Rev. 4 datasheet. This ±2 % tolerance is maintained across the full operating temperature range of −55 °C to +150 °C.
Is BZX38450-B13-QX suitable for bidirectional ESD protection?
No - BZX38450-B13-QX is a unidirectional Zener diode optimized for reverse-bias voltage regulation and clamping. It lacks symmetric breakdown characteristics and specified ESD ratings (e.g., IEC 61000-4-2). For bidirectional ESD protection, dedicated TVS diodes such as PESD5V0S1BA should be used instead.
How does the "intentional minor rise of leakage current" affect circuit performance?
Per AN90031, the controlled leakage increase improves switching speed and reduces high-frequency noise during transient events. In practice, this yields faster response to overvoltage spikes and lower broadband noise coupling - particularly beneficial in precision analog signal paths and fast-switching automotive power domains.
Can BZX38450-B13-QX be used in parallel for higher current capability?
No - Zener diodes exhibit negative temperature coefficients and manufacturing spread, causing current imbalance when paralleled. Even matched units risk thermal runaway. For higher current regulation, use a single higher-power Zener (e.g., BZX38413-B-Q) or a Zener-driven transistor pass circuit instead.
BZX38450-B13-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450-Q
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-B13-QX FAQ
1.How can I place an order for BZX38450-B13-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B13-QX 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-B13-QX reliable?
The price and inventory of BZX38450-B13-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B13-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-B13-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B13-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B13-QX?
BZX38450-B13-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B13-QX 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-B13-QX?
For technical support, including BZX38450-B13-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B13-QX requirements.
6.How does Aetrix verify that BZX38450-B13-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-B13-QX 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-B13-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-B13-QX?
All BZX38450-B13-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B13-QX, 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-B13-QX part is unused and in its original packaging.
Return procedure for BZX38450-B13-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B13-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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