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Nexperia USA Inc. BZX38450-B2V2-QX
- Part No.:
- BZX38450-B2V2-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B2V2-QX.pdf
- Description:
- DIODE ZENER 2.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,002
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Product details
Overview
BZX38450-B2V2-QX from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 2.2 V nominal regulation at 50 µA test current, with ±2 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-B2V2-QX datasheet, BZX38450-B2V2-QX pinout, BZX38450-B2V2-QX application, or BZX38450-B2V2-QX equivalent, key selection criteria include low-bias operation at 50 µA, thermal resistance of 415 K/W (junction-to-ambient), cathode/anode polarity marking, and compliance with automotive reliability standards.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable 2.2 V output under low-current conditions (IZ = 50 µA), with differential resistance ≤600 Ω at 5 mA and temperature coefficient of −3.5 mV/K. It exhibits forward voltage ≤0.9 V at 10 mA.
Designed for precision low-power regulation, it features intentional leakage optimization per AN90031 for fast switching and noise reduction, and supports ambient temperatures from −55 °C to +150 °C with junction limit of 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.2 V at IZ = 50 µA - defines regulation point for ultra-low bias circuits |
| Tolerance | ±2 % - enables tight voltage reference accuracy in sensing and feedback paths |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - limits thermal design margin on FR4 PCBs |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - determines load regulation error under small current changes |
| Forward Voltage | ≤0.9 V at IF = 10 mA - ensures minimal conduction loss when used bidirectionally or in protection roles |
| Junction Temperature Limit | 150 °C - sets maximum operating temperature for automotive under-hood environments |
| Thermal Resistance (j-a) | 415 K/W - indicates self-heating rise of ~125 K at full 300 mW on standard FR4 |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic case measuring 1.7 mm × 1.25 mm × 0.95 mm, with 1.3 mm lead pitch and cathode marked by a bar on the body.
| 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; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in battery-powered systems where quiescent current must be minimized |
| AEC-Q101 qualification | Qualified for automotive applications - assures reliability under temperature cycling, humidity, and mechanical stress per discrete semiconductor standard |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - improves transient response and reduces high-frequency noise in regulation loops |
| Small-footprint packaging | SOD323 outline with 1.3 mm pitch - supports high-density PCB layouts in space-constrained modules like ADAS sensors and ECUs |
Applications
| Automotive Sensor Reference | Portable Battery Monitor |
|---|---|
|
Use Scenario: Providing stable 2.2 V reference for analog front-end of tire pressure sensor MCU. IC Role / Device Role / Timing Role: Zener voltage reference for ADC biasing and supply rail stabilization. Use Value: ±2 % tolerance and −3.5 mV/K TC ensure <±15 mV drift over −40 °C to +125 °C, meeting ASIL-B sensor accuracy requirements. |
Use Scenario: Regulating reference voltage for coulomb counter IC in Bluetooth earbud battery management. IC Role / Device Role / Timing Role: Low-current shunt regulator establishing precision bias for fuel gauge IC. Use Value: 50 µA test current matches typical coulomb counter standby current, minimizing parasitic drain while maintaining 2.2 V accuracy. |
| Industrial IoT Node LDO Assist | USB-C Power Negotiation Clamp |
|
Use Scenario: Augmenting LDO output stability in wireless vibration sensor node powered by coin cell. IC Role / Device Role / Timing Role: Secondary shunt reference improving line/load regulation of 3.3 V LDO output. Use Value: 600 Ω differential resistance limits output deviation to <1.2 mV per 2 mA load step, enhancing measurement repeatability. |
Use Scenario: Clamping CC line voltage during USB-C PD communication handshake in portable dock. IC Role / Device Role / Timing Role: ESD-tolerant voltage clamp protecting Type-C controller GPIO. Use Value: 0.9 V forward voltage and 300 mW rating allow safe clamping of 3.3 V logic signals without latch-up or thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B2V2 | Same 2.2 V/±2 % spec but non-AEC-Q101; 250 mW max power; no optimized leakage profile | Limited to consumer or industrial non-automotive use; lacks automotive qualification documentation | Select when AEC-Q101 is not required and cost sensitivity outweighs thermal margin needs. |
| MMSZ4678T1G | 2.2 V/±5 %; 500 mW rating; higher VF (1.1 V); no AEC-Q101; TO-236AB package (larger footprint) | Higher power handling but looser tolerance and larger board area; unsuitable for space-constrained automotive modules | Choose only if higher power dissipation (>300 mW) is mandatory and ±5 % tolerance is acceptable. |
Compared with BZX38450-B2V2-QX, BZX384-B2V2 sacrifices automotive qualification and thermal margin for lower cost, while MMSZ4678T1G trades precision and size for raw power capacity-making the QX variant optimal for AEC-Q101-compliant, space- and current-sensitive designs.
Availability
BZX38450-B2V2-QX is available at Aetrix Electronics and suitable for automotive sensor references, portable battery monitors, industrial IoT node LDO assist, and USB-C power negotiation clamps requiring stable component supply across production lifecycles.
Supply support for BZX38450-B2V2-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 focused on high-volume, high-reliability essential semiconductors, with leadership in logic, discrete, and MOSFET technologies.
The BZX38450-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for low-current, high-stability voltage reference in harsh-environment electronics such as engine control units and ADAS subsystems.
FAQ
What is the maximum reverse current at 2.2 V before breakdown?
At VR = 2.2 V and Tj = 25 °C, the typical reverse current is ≤1.0 µA per Table 8. This low leakage ensures minimal parasitic drain in always-on automotive circuits and extends battery life in portable devices using this diode as a reference.
Can BZX38450-B2V2-QX be used in forward conduction mode?
Yes - its forward voltage is specified ≤0.9 V at 10 mA, making it suitable for low-drop rectification or polarity protection. However, its primary design intent is reverse-bias Zener regulation; forward use should respect IF ≤ 250 mA absolute maximum rating and thermal limits.
How does the AEC-Q101 qualification impact PCB layout?
AEC-Q101 qualification confirms robustness against thermal cycling and mechanical shock, but does not alter layout rules. Designers must still follow Nexperia's SOD323 reflow footprint (Fig. 10), maintain ≥0.25 mm solder mask clearance, and avoid excessive copper pour under the device to prevent uneven heating during assembly.
Is the 50 µA test current configurable in circuit design?
No - the 50 µA value is a standardized test condition for specifying nominal Zener voltage; actual operating current is set by external series resistance and supply voltage. Designers select Rseries to deliver 50 µA at nominal VZ, or adjust for higher currents (e.g., 5 mA) to reduce rdiff, accepting higher power and drift.
BZX38450-B2V2-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):
- 2.2 V
- Tolerance:
- ±2%
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-B2V2-QX FAQ
1.How can I place an order for BZX38450-B2V2-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B2V2-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-B2V2-QX reliable?
The price and inventory of BZX38450-B2V2-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-B2V2-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-B2V2-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B2V2-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B2V2-QX?
BZX38450-B2V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B2V2-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-B2V2-QX?
For technical support, including BZX38450-B2V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B2V2-QX requirements.
6.How does Aetrix verify that BZX38450-B2V2-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-B2V2-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-B2V2-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-B2V2-QX?
All BZX38450-B2V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B2V2-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-B2V2-QX part is unused and in its original packaging.
Return procedure for BZX38450-B2V2-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B2V2-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
Diodes Incorporated
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