My Inquiry
My Account
Nexperia USA Inc. BZX38450-C3V0-QX
- Part No.:
- BZX38450-C3V0-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C3V0-QX.pdf
- Description:
- DIODE ZENER 3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,276
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX38450-C3V0-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.0 V nominal regulation at 50 µA test current, with ±5 % tolerance, 300 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-C3V0-Q datasheet, BZX38450-C3V0-Q pinout, BZX38450-C3V0-Q application, or BZX38450-C3V0-Q equivalent, this device serves as a precision low-bias voltage reference in battery-powered sensor nodes, automotive body control modules, and portable instrumentation where stable 3.0 V regulation at microampere-level currents is required.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 3.0 V reference across its cathode–anode terminals under regulated current conditions. Its specified test current of 50 µA enables ultra-low quiescent operation, and its intentional leakage current profile supports fast switching transients and reduced noise in feedback paths.
The device exhibits a temperature coefficient of −3.5 mV/K and differential resistance of ≤600 Ω at IZ = 50 µA, ensuring predictable thermal drift and minimal dynamic impedance variation in precision biasing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V at IZ = 50 µA - defines precise regulation point for low-power reference circuits |
| Tolerance | ±5 % - ensures consistent 2.85 V to 3.15 V regulation window across production lots |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC or pulsed power handling on standard FR4 PCB |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA - limits forward conduction loss during polarity-sensitive bias sequencing |
| Junction Temperature | −55 °C to +150 °C - supports operation in under-hood automotive environments and industrial edge nodes |
| Reverse Current | ≤ 0.8 µA at VR = 1.0 V - guarantees minimal leakage in high-impedance sensing inputs |
| Thermal Resistance | 415 K/W (junction-to-ambient) - informs derating requirements for sustained power operation |
Pinout & Package
Package: SOD323 (SC-76), surface-mounted plastic package; 2-terminal device; 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; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Low test current (50 µA) | Enables direct use in micropower systems without external current amplification |
| Optimized leakage profile | Intentional minor leakage improves transient response and reduces noise in feedback loops |
| Small SOD323 footprint | Reduces PCB area by >50 % vs. DO-35 or SOD123 packages while maintaining thermal performance |
| Two tolerance series | ±2 % (B-series) and ±5 % (C-series) allow cost/performance trade-off selection per design requirement |
Applications
| Automotive Body Control Unit (BCU) | Portable Gas Sensor Module |
|---|---|
Use Scenario: Regulating reference voltage for analog front-end of LIN bus-connected door module MCU. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 3.0 V bias to ADC input stage and op-amp comparators. Use Value: Maintains <±10 mV regulation error over −40 °C to +125 °C ambient, enabling accurate voltage measurement despite battery voltage sag. |
Use Scenario: Supplying reference voltage to electrochemical gas sensor signal conditioning circuit powered by coin cell. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator establishing fixed 3.0 V rail for sensor bias and amplifier gain-setting resistors. Use Value: Draws only 50 µA at regulation, extending CR2032 battery life beyond 5 years in standby mode. |
| Industrial IoT Edge Node | Medical Wearable Power Monitor |
Use Scenario: Providing precision reference for isolated current-sense amplifier in smart meter auxiliary supply. IC Role / Device Role / Timing Role: Shunt regulator stabilizing local 3.0 V domain for metrology IC and RF transceiver LDO input. Use Value: Differential resistance ≤600 Ω minimizes load-induced voltage shift during RF burst transmission events. |
Use Scenario: Generating stable 3.0 V reference for battery voltage monitoring ADC in ECG patch. IC Role / Device Role / Timing Role: Low-leakage Zener diode referenced against system ground to calibrate Li-ion cell voltage readings. Use Value: Reverse current ≤0.8 µA at 1.0 V prevents measurable error in high-impedance divider networks used for battery telemetry. |
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-B3V0 | Same 3.0 V nominal, ±2 % tolerance, but not AEC-Q101 qualified; higher rdiff (≤1000 Ω) | Suitable for commercial-grade portable electronics only; lacks automotive stress validation | Select when tighter voltage tolerance is critical and automotive qualification is unnecessary |
| MMSZ5226ET1G | 3.0 V nominal, ±5 %, SOD-123 package; 500 mW rating; no AEC-Q101 certification; rdiff ≤ 17 Ω at 20 mA | Better dynamic regulation at higher currents, but larger footprint and unqualified for automotive | Prefer for non-automotive designs requiring lower impedance at >1 mA operating points |
Compared with BZX38450-C3V0-Q, the BZX384-B3V0 offers tighter tolerance but lacks automotive qualification and has higher dynamic impedance, while MMSZ5226ET1G delivers lower rdiff at higher currents but sacrifices AEC-Q101 compliance and increases board space.
Availability
BZX38450-C3V0-Q is available at Aetrix Electronics and suitable for automotive body control units, portable gas sensor modules, and industrial IoT edge nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX38450-C3V0-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 logic, discrete, and MOSFET devices with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.
This part belongs to the BZX38450-Q series of low-current Zener regulators designed specifically for AEC-Q101-compliant automotive subsystems and ultra-low-power portable electronics requiring stable voltage references at microampere bias levels.
FAQ
What is the maximum continuous reverse power dissipation for BZX38450-C3V0-Q?
The maximum continuous total power dissipation is 300 mW at ambient temperature ≤25 °C on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 2.4 mW/°C based on Rth(j-a) = 415 K/W, and junction temperature must remain ≤150 °C.
Does BZX38450-C3V0-Q support bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias voltage regulation only. Its forward voltage is ≤0.9 V at 10 mA, but it lacks symmetric clamping characteristics or specified ESD ratings; dedicated TVS diodes such as PESD5V0S1BA should be used for ESD protection.
Can BZX38450-C3V0-Q be used in series with other Zeners to achieve higher reference voltages?
Yes - multiple BZX38450-C3V0-Q devices may be stacked anode-to-cathode to generate integer multiples of 3.0 V (e.g., two in series yield ~6.0 V), provided current remains within 50 µA per device and total power stays within 300 mW per unit; thermal coupling must be considered in layout.
How does the "C" suffix in BZX38450-C3V0-Q affect its electrical behavior compared to "B"-series variants?
The "C" suffix denotes ±5 % tolerance and an intentionally elevated leakage current profile optimized for faster switching transitions and lower noise in feedback circuits, whereas "B"-series parts offer ±2 % tolerance and lower leakage - both share identical 3.0 V nominal voltage and SOD323 packaging.
BZX38450-C3V0-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):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 800 nA @ 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-C3V0-QX FAQ
1.How can I place an order for BZX38450-C3V0-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C3V0-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-C3V0-QX reliable?
The price and inventory of BZX38450-C3V0-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-C3V0-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C3V0-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C3V0-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C3V0-QX?
BZX38450-C3V0-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C3V0-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-C3V0-QX?
For technical support, including BZX38450-C3V0-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C3V0-QX requirements.
6.How does Aetrix verify that BZX38450-C3V0-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C3V0-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-C3V0-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C3V0-QX?
All BZX38450-C3V0-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C3V0-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-C3V0-QX part is unused and in its original packaging.
Return procedure for BZX38450-C3V0-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C3V0-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
