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Nexperia USA Inc. BZX38450-B2V4-QX
- Part No.:
- BZX38450-B2V4-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B2V4-QX.pdf
- Description:
- DIODE ZENER 2.4V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,532
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Product details
Overview
BZX38450-B2V4-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 2.4 V nominal Zener voltage at 50 µA test current, ±2 % tolerance, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive use.
For engineers reviewing the BZX38450-B2V4-Q datasheet, BZX38450-B2V4-Q pinout, BZX38450-B2V4-Q application, or BZX38450-B2V4-Q equivalent, this page delivers verified electrical characteristics, thermal resistance data, cathode/anode terminal mapping, automotive qualification status, and low-bias design implications for battery-powered regulation circuits.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable 2.4 V regulation under reverse bias with specified differential resistance ≤600 Ω at IZ = 50 µA and temperature coefficient of −3.5 mV/K. Its low 50 µA test current enables minimal quiescent draw in always-on monitoring paths.
Designed for surface-mount implementation on FR4 PCBs with single-sided copper, it exhibits Rth(j-a) = 415 K/W and Rth(j-sp) = 110 K/W, supporting thermal management in space-constrained automotive modules where ambient temperatures range from −55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.35 V to 2.45 V at IZ = 50 µA - tight ±2 % tolerance ensures precise low-voltage rail clamping in sensor biasing and reference circuits. |
| Differential Resistance rdiff | ≤600 Ω at IZ = 50 µA - limits output impedance drift under light load variation, critical for stable feedback in low-power LDO pre-regulators. |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - defines conduction threshold during transient overvoltage events when used in bidirectional protection configurations. |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - sets maximum continuous reverse power handling on standard FR4 layout without heatsinking. |
| Junction Temperature Tj | −55 °C to +150 °C - enables operation in under-hood automotive environments and industrial control enclosures with wide thermal excursions. |
| Reverse Current IR | ≤2.0 µA at VR = 1.0 V - confirms low leakage in standby mode, preserving battery life in portable diagnostic tools and telematics modules. |
| Capacitance Cd | 200 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering capability when deployed in EMI suppression networks near microcontroller I/O lines. |
Pinout & Package
SOD323 (SC-76) plastic surface-mount 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; polarity marking bar aligns with this terminal for correct PCB orientation during automated placement. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms shunt path to sink excess current when input exceeds 2.4 V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - eliminates need for additional qualification effort in Tier-1 module designs. |
| Low 50 µA test current | Enables regulation in ultra-low-power circuits such as wake-up comparators and battery voltage monitors where supply current must stay below 100 µA. |
| ±2 % voltage tolerance | Reduces calibration overhead in precision analog front-ends for engine control units and ADAS sensor interfaces requiring stable 2.4 V references. |
| Optimized leakage profile | Intentional minor rise in reverse leakage improves switching speed and reduces broadband noise - beneficial in CAN transceiver bias networks and LIN bus termination. |
| Thermal resistance Rth(j-sp) | 110 K/W to solder point - allows accurate junction temperature estimation using board-level thermal modeling for lifetime prediction in sealed automotive housings. |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Shunt regulator providing stable 2.4 V bias to sensor bridge circuitry and ADC reference input. Use Value: Tight ±2 % tolerance and −3.5 mV/K temperature coefficient minimize offset drift across −40 °C to +85 °C cabin operating range. |
Use Scenario: Low-quiescent regulation for ECG front-end amplifiers powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring consistent op-amp biasing and ADC reference stability during multi-day wearable operation. Use Value: 50 µA test current and ≤2.0 µA leakage at 1.0 V reverse bias extend battery life beyond 12 months without recharge. |
| Industrial IoT Edge Nodes | Telematics Control Units |
|
Use Scenario: Reference source for isolated RS-485 transceiver bias in smart meter communication modules. IC Role / Device Role / Timing Role: Low-noise Zener supplying clean 2.4 V to driver stage, reducing common-mode jitter on differential bus lines. Use Value: Optimized leakage profile suppresses broadband noise, improving signal integrity margin in noisy factory floor environments. |
Use Scenario: Overvoltage protection and level-shifting element in GPS/GNSS receiver power domain interfacing with 3.3 V MCU I/O. IC Role / Device Role / Timing Role: Bidirectional clamp limiting input transients to safe 2.4 V while passing logic signals via series resistor network. Use Value: 0.9 V forward voltage and 200 pF capacitance preserve signal edge rate and minimize timing skew on 10 MHz UART paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C2V4-Q | ±5 % tolerance, higher leakage (≤5 µA at VR = 1.0 V), same SOD323 package and 2.4 V nominal rating. | Acceptable where cost sensitivity outweighs precision requirements, e.g., non-critical LED biasing or generic voltage clamping. | Select when AEC-Q101 is not required and system-level calibration compensates for wider voltage spread. |
| MMSZ4685T1G | 2.4 V nominal, ±5 %, 500 mW Ptot, SOD-123 package, no AEC-Q101 qualification. | Suitable for commercial-grade consumer electronics but lacks automotive reliability validation and thermal performance data. | Choose only for non-automotive designs where higher power margin is needed and footprint change is acceptable. |
Compared with BZX38450-B2V4-Q, the BZX384-C2V4-Q trades precision for cost in non-safety-critical roles, while MMSZ4685T1G offers higher power headroom but forfeits automotive qualification and thermal metrics essential for under-hood deployment.
Availability
BZX38450-B2V4-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial IoT edge nodes, and telematics control units requiring stable component supply with AEC-Q101 compliance and traceable sourcing.
Supply support for BZX38450-B2V4-Q 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 robustness.
The BZX38450-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for low-current voltage regulation in space-constrained, thermally demanding environments such as engine control modules and ADAS subsystems.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX38450-B2V4-Q is specified for nominal 2.4 V Zener voltage at 50 µA test current, with guaranteed breakdown occurring between 2.35 V and 2.45 V. It is not rated for sustained operation above its specified VZ; exceeding 2.45 V continuously risks thermal runaway due to its 300 mW power limit and 415 K/W junction-to-ambient thermal resistance.
Can this Zener diode be used in forward-biased configuration?
Yes - the device exhibits ≤0.9 V forward voltage at 10 mA, making it usable as a low-drop rectifier or ESD clamp in bidirectional protection schemes. However, its primary design intent and characterization are for reverse-bias regulation; forward conduction is secondary and not optimized for high-current switching.
How does the AEC-Q101 qualification impact its use in non-automotive applications?
AEC-Q101 qualification certifies extended temperature operation (−55 °C to +150 °C), enhanced reliability under thermal cycling and mechanical stress, and rigorous defect screening - all of which improve long-term field stability in industrial, medical, and aerospace applications even when automotive use is not required.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia provides validated reflow footprint dimensions (Fig. 10) and specifies compatibility with JEDEC J-STD-020 moisture sensitivity level 1. The 0.95 mm height and 1.3 mm pitch support standard stencil design and 260 °C peak reflow profiles without tombstoning or voiding when using recommended solder paste volume and pad geometry.
BZX38450-B2V4-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):
- 2.4 V
- Tolerance:
- ±2%
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-B2V4-QX FAQ
1.How can I place an order for BZX38450-B2V4-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B2V4-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-B2V4-QX reliable?
The price and inventory of BZX38450-B2V4-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-B2V4-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-B2V4-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B2V4-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B2V4-QX?
BZX38450-B2V4-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B2V4-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-B2V4-QX?
For technical support, including BZX38450-B2V4-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B2V4-QX requirements.
6.How does Aetrix verify that BZX38450-B2V4-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-B2V4-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-B2V4-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-B2V4-QX?
All BZX38450-B2V4-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B2V4-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-B2V4-QX part is unused and in its original packaging.
Return procedure for BZX38450-B2V4-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B2V4-QX 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
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