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Nexperia USA Inc. BZX38450-C2V4-QX
- Part No.:
- BZX38450-C2V4-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C2V4-QX.pdf
- Description:
- DIODE ZENER 2.4V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,244
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Product details
Overview
BZX38450-C2V4-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in low-power circuits. It delivers a nominal 2.4 V regulation at 50 µA test current, with ±2 % tolerance, 200 Ω differential resistance at 5 mA, and −3.5 mV/K temperature coefficient - enabling stable operation in battery-powered sensor nodes and automotive microcontroller reset circuits.
For engineers reviewing the BZX38450-C2V4-Q datasheet, BZX38450-C2V4-Q pinout, BZX38450-C2V4-Q application, or BZX38450-C2V4-Q equivalent, key selection criteria include its AEC-Q101 qualification, ultra-low leakage (≤1.0 µA at 1.0 V), 300 mW power rating on FR4 PCB, and intentional cathode-anode polarity marking for reliable SMT assembly in space-constrained automotive ECUs.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA - optimized for minimal quiescent current draw in always-on monitoring circuits. Its differential resistance of 200 Ω at 5 mA ensures predictable voltage deviation under small load variations.
The −3.5 mV/K temperature coefficient and 200 pF capacitance at 0 V bias support stable DC reference generation in ambient temperatures from −55 °C to +150 °C, while the SOD323 footprint enables high-density placement on compact PCBs without thermal derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.4 V at IZ = 50 µA - precise low-voltage reference for MCU brown-out detection |
| Tolerance | ±2 % - tight regulation band suitable for automotive-grade voltage supervision |
| Differential Resistance | 200 Ω at IZ = 5 mA - limits output voltage shift under 100 µA load change to <0.02 V |
| Temperature Coefficient | −3.5 mV/K - predictable negative drift enables compensation in analog front-ends |
| Forward Voltage | 0.9 V at IF = 10 mA - defines anode-cathode conduction threshold during power-up sequencing |
| Max Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB - sets absolute upper limit for continuous DC bias current (≤125 mA) |
| Reverse Leakage | ≤1.0 µA at VR = 1.0 V - ensures negligible current draw in standby mode of portable devices |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, single-sided copper FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by bar on package top - reverse-biased terminal during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail - completes bias path for controlled breakdown current flow |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including engine control modules and body electronics |
| Low test current specification | Regulation defined at 50 µA - enables use in nanoamp-level sleep-mode circuits without compromising accuracy |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - reduces switching noise in ADC reference paths |
| Thermal resistance | Rth(j-a) = 415 K/W - supports operation up to 150 °C junction temperature with standard PCB layout |
| Marking identification | "6U" code per Table 4 - unambiguous visual verification of C-series ±2 % tolerance variant |
Applications
| Automotive Microcontroller Reset Circuit | Portable Gas Sensor Biasing |
|---|---|
Use Scenario: Provides clean, temperature-stable 2.4 V reference to enable precise brown-out detection in engine control units operating across −40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Zener voltage reference diode - establishes threshold voltage for reset supervisor IC input. Use Value: ±2 % tolerance and −3.5 mV/K TC ensure reset activation remains within 2.35–2.45 V over full temperature range, preventing spurious resets. |
Use Scenario: Supplies stable bias voltage to electrochemical gas sensor elements in handheld air quality monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current voltage regulator - maintains constant sensor excitation voltage despite battery discharge from 3.0 V to 2.0 V. Use Value: 1.0 µA max leakage at 1.0 V preserves >99.9 % of battery capacity during multi-week standby periods. |
| Industrial PLC Input Protection | Medical Wearable Signal Conditioning |
Use Scenario: Clamps transient overvoltage on 24 V digital input channels of programmable logic controllers exposed to inductive load switching noise. IC Role / Device Role / Timing Role: Zener clamp diode - shunts surge energy above 2.4 V to ground before reaching downstream protection ICs. Use Value: 40 W non-repetitive peak power rating (tp = 100 µs) absorbs typical 2 kV ESD events without degradation. |
Use Scenario: Sets reference voltage for instrumentation amplifier gain stage in ECG patch devices requiring sub-µA quiescent current. IC Role / Device Role / Timing Role: Precision voltage reference - defines common-mode level for analog signal chain powered from single 3.0 V Li-ion cell. Use Value: 200 pF capacitance at 0 V minimizes high-frequency coupling into sensitive biopotential amplifiers. |
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-B2V4 | Same 2.4 V nominal, ±5 % tolerance, no AEC-Q101 qualification | Not rated for automotive use; higher leakage (≤2.0 µA at 1.0 V) | Select only for cost-sensitive industrial prototypes where qualification is not required |
| MMSZ4676T1G | 2.4 V nominal, ±5 %, SOD-123 package (larger footprint), Rth(j-a) = 500 K/W | Lower thermal performance; unsuitable for high-density automotive PCBs | Choose when existing design uses SOD-123 land pattern and AEC-Q101 is not mandated |
Compared with BZX38450-C2V4-Q, BZX384-B2V4 lacks automotive qualification and has looser tolerance, while MMSZ4676T1G requires more board area and offers inferior thermal resistance - making the BZX38450-C2V4-Q optimal for space-constrained, safety-critical automotive voltage references.
Availability
BZX38450-C2V4-Q is available at Aetrix Electronics and suitable for automotive electronic control units, portable medical sensors, industrial PLC input stages, and battery-powered IoT edge nodes requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-C2V4-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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage reference and regulation in harsh-environment automotive and industrial systems.
FAQ
What is the maximum continuous reverse current the BZX38450-C2V4-Q can sustain without exceeding its 300 mW power limit?
At 2.4 V Zener voltage, the absolute maximum continuous reverse current is 125 mA (300 mW ÷ 2.4 V). However, the device is characterized for regulation at 50 µA and tested up to 5 mA - sustained operation above 5 mA requires thermal validation on the target PCB per Rth(j-a) = 415 K/W.
How does the "C" suffix in BZX38450-C2V4-Q differ from the "B" suffix in the same series?
The "C" suffix denotes ±2 % voltage tolerance and optimized leakage behavior per AN90031, whereas "B" indicates ±5 % tolerance and standard leakage. For BZX38450-C2V4-Q, this means tighter regulation (2.28–2.52 V) and intentional minor leakage rise to reduce switching noise - critical for precision analog applications.
Can the BZX38450-C2V4-Q be used in forward-bias configuration as a standard silicon diode?
Yes - it exhibits 0.9 V forward voltage at 10 mA, matching typical silicon diode behavior. However, its primary design intent is reverse-bias Zener operation; forward conduction is not characterized beyond VF, and no guaranteed parameters exist for rectification efficiency or recovery time.
Is the SOD323 package of the BZX38450-C2V4-Q compatible with standard reflow soldering profiles for lead-free assembly?
Yes - Nexperia provides validated reflow footprint (Fig. 10) and thermal profile guidance. The SOD323 package supports JEDEC J-STD-020-compliant lead-free reflow, with peak temperature ≤260 °C and time above liquidus 60–150 seconds, provided solder land dimensions match the 0.5 mm × 1.1 mm pads specified in the datasheet.
BZX38450-C2V4-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:
- ±5%
- 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:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C2V4-QX FAQ
1.How can I place an order for BZX38450-C2V4-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C2V4-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-C2V4-QX reliable?
The price and inventory of BZX38450-C2V4-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-C2V4-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C2V4-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C2V4-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C2V4-QX?
BZX38450-C2V4-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C2V4-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-C2V4-QX?
For technical support, including BZX38450-C2V4-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C2V4-QX requirements.
6.How does Aetrix verify that BZX38450-C2V4-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C2V4-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-C2V4-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C2V4-QX?
All BZX38450-C2V4-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C2V4-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-C2V4-QX part is unused and in its original packaging.
Return procedure for BZX38450-C2V4-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C2V4-QX 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
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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