My Inquiry
My Account
Nexperia USA Inc. BZX38450-C5V6X
- Part No.:
- BZX38450-C5V6X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C5V6X.pdf
- Description:
- DIODE ZENER 5.6V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:31,611
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX38450-C5V6X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in portable electronics. It delivers a nominal 5.6 V regulation at 50 µA test current, with ±5 % tolerance, 400 Ω differential resistance at 5 mA, and 2.0 µA max reverse leakage at 4.0 V, enabling stable operation in battery-powered sensor nodes and low-power microcontroller reset circuits.
For engineers reviewing the BZX38450-C5V6X datasheet, BZX38450-C5V6X pinout, BZX38450-C5V6X application, or BZX38450-C5V6X equivalent, key selection criteria include its low 50 µA test current, ±5 % tolerance grade, SOD323 footprint compatibility, thermal resistance of 110 K/W to solder point, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 5.32 V (min) to 5.88 V (max) at IZ = 50 µA. Its differential resistance is 400 Ω (max) at 5 mA, and temperature coefficient is −2.0 mV/K - indicating negative drift with rising junction temperature.
The device features intentionally elevated leakage current versus standard B-grade variants (per AN90031), optimized for fast switching transients and reduced high-frequency noise in reference paths. It is rated for 300 mW total power dissipation on FR4 PCB with single-sided copper and exhibits 120 pF capacitance at 0 V and 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.6 V - precise reference level for 5 V rail monitoring or MCU brown-out detection |
| Voltage Tolerance | ±5 % - C-grade variant ensures tighter consistency than generic 10 % Zeners |
| Test Current | 50 µA - enables ultra-low quiescent current biasing in always-on IoT sensors |
| Differential Resistance | 400 Ω max at 5 mA - defines output impedance affecting load regulation error |
| Reverse Leakage | 2.0 µA max at 4.0 V - low enough for micropower sleep-mode retention |
| Forward Voltage | 0.9 V max at 10 mA - supports use as clamping diode in bidirectional protection schemes |
| Power Dissipation | 300 mW max at Tamb ≤ 25 °C - sets thermal design margin for SOD323 layout |
| Junction Temperature | 150 °C max - constrains maximum allowable power under ambient derating |
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. Cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage node; polarity critical for correct Zener operation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; forms reverse-biased junction with cathode |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - minimizes standby current draw in battery-critical designs |
| Optimized leakage profile | Intentional minor rise per AN90031 - improves transient response and reduces broadband noise |
| Thermal performance | Rth(j-sp) = 110 K/W - enables reliable heat transfer to PCB copper via cathode pad |
| Small-footprint packaging | SOD323 outline - saves board space in dense wearables and compact modules |
| Wide voltage range support | Part of 1.8 V–51 V family - allows standardized procurement across multiple reference voltages |
Applications
| Portable Sensor Node Power Management | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Low-power environmental sensor (e.g., temperature/humidity) operating from coin cell with 10-year battery life requirement. IC Role / Device Role / Timing Role: Zener reference for ADC voltage scaling and LDO feedback divider. Use Value: 50 µA test current and 2.0 µA leakage ensure sub-µA system standby current is preserved. |
Use Scenario: Industrial-grade STM32-based controller requiring deterministic brown-out reset at 4.75 V. IC Role / Device Role / Timing Role: Precision 5.6 V reference feeding comparator input in reset supervisor circuit. Use Value: ±5 % tolerance and −2.0 mV/K tempco enable accurate trip-point setting across −40 °C to +85 °C. |
| Wearable Device Battery Monitoring | IoT Edge Node Analog Front-End Biasing |
|
Use Scenario: Bluetooth LE hearable with integrated fuel-gauge IC needing stable 5 V reference. IC Role / Device Role / Timing Role: Voltage reference for battery voltage divider network feeding ADC input. Use Value: 120 pF capacitance and low noise profile prevent signal coupling into sensitive measurement path. |
Use Scenario: LoRaWAN end-node with op-amp signal conditioning stage powered from 3.3 V LDO. IC Role / Device Role / Timing Role: Bias reference for rail-splitter or offset nulling network. Use Value: Optimized leakage behavior per AN90031 suppresses switching noise from digital subsystems near analog section. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38450-B5V6 | ±2 % tolerance, higher 500 Ω rdiff, lower 1.0 µA IR at 4.0 V | Better accuracy but higher dynamic impedance; suited for precision references over narrow temp range | Select when absolute voltage accuracy outweighs low-noise transient response |
| MMSZ5232B-7-F | ±5 % tolerance, 1500 Ω rdiff, 5.0 µA IR at 4.0 V, SOD-123 package | Larger footprint, higher leakage, less optimized for noise; widely available but thermally inferior | Choose only if SOD-123 is already standardized in legacy design and noise sensitivity is low |
Compared with BZX38450-B5V6, the C5V6X trades 3× tighter voltage tolerance for superior noise suppression and lower dynamic impedance; versus MMSZ5232B-7-F, it delivers 2.5× lower leakage, 3.75× better rdiff, and 30 % smaller footprint - making it optimal for space-constrained, low-noise, micropower systems.
Availability
BZX38450-C5V6X is available at Aetrix Electronics and suitable for portable sensor nodes, microcontroller reset circuits, wearable battery monitors, and IoT edge node analog front-ends requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX38450-C5V6X 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 and industrial-grade components.
The BZX38450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for micropower biasing, voltage referencing, and noise-sensitive regulation in battery-operated and space-constrained electronics.
FAQ
What is the maximum continuous reverse power dissipation for BZX38450-C5V6X?
The device is rated for 300 mW total power dissipation at ambient temperatures ≤25 °C when mounted on an FR4 PCB with single-sided copper and standard SOD323 footprint. Derating is required above 25 °C per the 415 K/W junction-to-ambient thermal resistance specification.
How does the "C" grade differ from the "B" grade in the BZX38450 series?
The "C" grade offers ±5 % voltage tolerance and features intentionally elevated reverse leakage current compared to "B" grade (±2 %), as documented in application note AN90031. This design choice optimizes switching speed and reduces high-frequency noise in reference paths without compromising regulation stability.
Can BZX38450-C5V6X be used in forward conduction mode?
Yes - it exhibits a maximum forward voltage of 0.9 V at 10 mA, making it suitable for low-drop clamping or ESD protection functions. However, its primary design intent and characterization are for reverse-biased Zener operation; forward parameters are secondary specifications.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia provides dedicated reflow footprint guidelines (Fig. 10) for SOD323, specifying 0.5 mm solder land width, 0.6 mm solder resist opening, and 1.5 mm occupied area. The device is qualified for JEDEC J-STD-020 moisture sensitivity level 1 and withstands peak reflow temperatures up to 260 °C.
BZX38450-C5V6X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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-C5V6X FAQ
1.How can I place an order for BZX38450-C5V6X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C5V6X 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-C5V6X reliable?
The price and inventory of BZX38450-C5V6X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C5V6X is usually 5 days.
3.What payment methods are accepted for BZX38450-C5V6X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C5V6X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C5V6X?
BZX38450-C5V6X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C5V6X 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-C5V6X?
For technical support, including BZX38450-C5V6X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C5V6X requirements.
6.How does Aetrix verify that BZX38450-C5V6X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C5V6X 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-C5V6X meets industry standards.
7.What is the process for return or replacement of BZX38450-C5V6X?
All BZX38450-C5V6X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C5V6X, 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-C5V6X part is unused and in its original packaging.
Return procedure for BZX38450-C5V6X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C5V6X 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…
