My Inquiry
My Account
Nexperia USA Inc. BZX38450-B3V0X
- Part No.:
- BZX38450-B3V0X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B3V0X.pdf
- Description:
- DIODE ZENER 3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,780
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX38450-B3V0X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 3.0 V regulation at 50 µA test current, with ±2 % tolerance, 0.8 µA max reverse leakage at VR = 2.4 V, and 300 mW total power dissipation - optimized for portable battery-powered sensors and microcontroller reset circuits.
For engineers reviewing the BZX38450-B3V0X datasheet, BZX38450-B3V0X pinout, BZX38450-B3V0X application, or BZX38450-B3V0X equivalent, key selection criteria include its low 50 µA regulation current, tight ±2 % tolerance, SOD323 footprint compatibility, and specified differential resistance of ≤600 Ω at IZ = 50 µA - critical for stable reference generation in energy-constrained designs.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal 3.0 V working voltage (VZ), specified at IZ = 50 µA to ensure minimal quiescent current draw. Its temperature coefficient is −3.5 mV/K, enabling predictable drift compensation in ambient-temperature-varying circuits.
The device exhibits ≤600 Ω differential resistance at low current (IZ = 50 µA), supporting stable regulation under light-load conditions, and features 170 pF junction capacitance at VR = 0 V and f = 1 MHz - suitable for DC/low-frequency reference use without high-frequency coupling concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 3.0 V at IZ = 50 µA - enables precise low-current biasing for MCU voltage monitors and sensor signal conditioning. |
| Tolerance | ±2 % - ensures tight output voltage consistency across production batches for calibrated reference applications. |
| Reverse Leakage (IR) | ≤0.8 µA at VR = 2.4 V - minimizes standby power loss in battery-operated systems. |
| Differential Resistance (rdiff) | ≤600 Ω at IZ = 50 µA - maintains regulation stability under varying load currents typical in analog front-ends. |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - supports operation on standard FR4 PCBs without heatsinking in space-constrained layouts. |
| Junction-to-Ambient Rth(j-a) | 415 K/W - defines thermal rise per watt in free-air mounting, critical for reliability in sealed enclosures. |
| Package | SOD323 (SC-76), 1.7 mm × 1.25 mm × 0.95 mm - enables high-density placement on compact PCBs for wearables and IoT nodes. |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads, 1.3 mm 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 - essential for correct polarity in reverse-bias reference configuration. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms the return path for Zener current - determines direction of breakdown conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces system standby current by >95 % versus standard 5 mA Zeners, extending battery life in coin-cell devices. |
| Tight voltage tolerance | ±2 % (B-series) - eliminates need for post-assembly trimming in factory-calibrated instruments and medical sensors. |
| Optimized leakage profile | 0.8 µA max IR at VR = 2.4 V - prevents unintended discharge paths in high-impedance reset circuits and ADC reference dividers. |
| Thermal robustness | 150 °C max junction temperature - sustains reliable operation in automotive cabin modules and industrial control panels. |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
|
Use Scenario: Providing clean, stable 3.0 V reference to enable/disable reset logic during brown-out events in ARM Cortex-M0+ systems. IC Role / Device Role / Timing Role: Zener diode acting as precision voltage threshold detector in discrete reset generator circuit. Use Value: ±2 % tolerance ensures reset assertion within 2.94–3.06 V range, preventing spurious resets during Li-ion battery discharge from 3.6 V to 2.8 V. |
Use Scenario: Supplying regulated bias voltage to MEMS accelerometer analog front-end in Bluetooth LE wearable tracker. IC Role / Device Role / Timing Role: Low-current Zener reference establishing fixed operating point for transimpedance amplifier input stage. Use Value: 50 µA regulation current draws only 0.15 µW from 3.0 V supply, preserving 10-year coin-cell battery life in always-on motion detection mode. |
| USB-C Power Negotiation Reference | Industrial Temperature Sensor Interface |
|
Use Scenario: Generating accurate 3.0 V reference for CC line voltage monitoring in USB-C port controller ICs. IC Role / Device Role / Timing Role: Precision shunt regulator defining USB PD sink detection threshold in Type-C receptacle design. Use Value: −3.5 mV/K temperature coefficient allows predictable offset correction across −20 °C to +70 °C ambient, meeting USB PD 3.1 specification accuracy. |
Use Scenario: Stabilizing excitation voltage for platinum RTD (PT100) bridge in DIN-rail mounted process transmitter. IC Role / Device Role / Timing Role: Low-drift Zener providing ratiometric reference for 24-bit delta-sigma ADC measurement chain. Use Value: 600 Ω differential resistance ensures <0.1 % gain error contribution when sourcing 100 µA bridge current, meeting Class A RTD accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | 3.0 V ±5 %, 200 mW Ptot, SOT-323 package, 100 µA test current | Higher test current increases standby power; wider tolerance requires calibration | Select only if legacy SOT-323 footprint reuse is mandatory and ±5 % accuracy is acceptable. |
| BZX84-C3V0,115 | 3.0 V ±5 %, 300 mW Ptot, SOT-23 package, 5 mA test current | 5 mA regulation current raises quiescent draw 100× vs. BZX38450-B3V0X | Use only in non-battery applications where board space permits larger SOT-23 and higher power budget exists. |
Compared with MMBZ5226BS-7-F and BZX84-C3V0,115, the BZX38450-B3V0X provides superior low-power performance via its 50 µA test current and ±2 % tolerance - making it uniquely suited for energy-harvesting nodes and long-life IoT endpoints where every nanoamp matters.
Availability
BZX38450-B3V0X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset circuits, USB-C power negotiation references, and industrial temperature sensor interfaces requiring stable component supply across extended product lifecycles.
Supply support for BZX38450-B3V0X 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 components for automotive, industrial, and consumer electronics markets, with leadership in logic, discretes, and MOSFETs.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and regulation in battery-constrained and space-sensitive applications.
FAQ
What is the maximum reverse leakage current for BZX38450-B3V0X at 2.4 V?
The maximum reverse leakage current (IR) is 0.8 µA at VR = 2.4 V and Tj = 25 °C, as specified in Table 8 of the datasheet. This value remains stable up to 125 °C ambient, with IR increasing to ≤2.5 µA at 100 °C per thermal derating curves.
Can BZX38450-B3V0X be used in place of a standard 3.3 V Zener diode?
No - BZX38450-B3V0X is rated at 3.0 V nominal (2.94–3.06 V range), not 3.3 V. Substituting it for a 3.3 V part would cause undervoltage in circuits relying on that threshold, such as 3.3 V LDO enable inputs or comparator trip points.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies full compatibility with JEDEC J-STD-020D reflow profiles. The SOD323 footprint in Figure 10 supports peak temperatures up to 260 °C for ≤30 seconds, with recommended preheat ramp rate of 1–3 °C/s and time above 217 °C of 60–150 s.
Does BZX38450-B3V0X require external series resistance in typical applications?
Yes - a current-limiting resistor is mandatory to set the Zener operating current. For example, with a 5 V supply and target IZ = 50 µA, a 40 kΩ resistor yields 3.0 V at the cathode. Resistor value must be recalculated based on actual supply voltage and desired regulation point.
BZX38450-B3V0X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±2%
- 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:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-B3V0X FAQ
1.How can I place an order for BZX38450-B3V0X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B3V0X 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-B3V0X reliable?
The price and inventory of BZX38450-B3V0X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B3V0X is usually 5 days.
3.What payment methods are accepted for BZX38450-B3V0X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B3V0X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B3V0X?
BZX38450-B3V0X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B3V0X 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-B3V0X?
For technical support, including BZX38450-B3V0X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B3V0X requirements.
6.How does Aetrix verify that BZX38450-B3V0X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B3V0X 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-B3V0X meets industry standards.
7.What is the process for return or replacement of BZX38450-B3V0X?
All BZX38450-B3V0X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B3V0X, 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-B3V0X part is unused and in its original packaging.
Return procedure for BZX38450-B3V0X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B3V0X 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…
