My Inquiry
My Account
Nexperia USA Inc. BZX38450-C6V8X
- Part No.:
- BZX38450-C6V8X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C6V8X.pdf
- Description:
- DIODE ZENER 6.8V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX38450-C6V8X 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 6.8 V regulation at 50 µA test current, with ±5 % tolerance, 80 Ω differential resistance at 5 mA, and 1.2 mV/K temperature coefficient - enabling stable operation in portable battery-powered sensors and microcontroller reset circuits.
For engineers reviewing the BZX38450-C6V8X datasheet, BZX38450-C6V8X pinout, BZX38450-C6V8X application, or BZX38450-C6V8X equivalent, key selection criteria include its 50 µA regulation point, 100 pF capacitance at 0 V, 300 mW power dissipation limit, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled VZ = 6.46–7.14 V at IZ = 50 µA, exhibiting low dynamic impedance (80 Ω typical at 5 mA) and minimal temperature drift (1.2 mV/K). Its design targets low-bias stability where conventional regulators draw excessive quiescent current.
The device features an intentionally elevated leakage current profile per AN90031 to suppress switching transients and reduce broadband noise - a deliberate trade-off versus standard Zeners, validated for use in ADC reference buffers and oscillator bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.8 V at 50 µA - sets precise reference level for low-current bias networks |
| Voltage Tolerance | ±5 % - defines absolute accuracy band for calibration-critical applications |
| Differential Resistance | 80 Ω at 5 mA - determines output impedance and load regulation error |
| Temperature Coefficient | +1.2 mV/K - enables predictable drift compensation in wide-temperature environments |
| Capacitance | 100 pF at 0 V, 1 MHz - impacts high-frequency noise coupling and filter response |
| Forward Voltage | 0.9 V at 10 mA - defines forward conduction threshold in dual-direction protection schemes |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - constrains maximum continuous bias current to ~44 mA at 6.8 V |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 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 voltage node; polarity must be observed for correct Zener operation |
| 2 | Anode (A) | 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 - enables regulation in nanoamp-level standby circuits without loading source |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient immunity in sensitive analog stages |
| Tight thermal coefficient | +1.2 mV/K - supports stable reference generation across −55 °C to +150 °C ambient range |
| Small-footprint packaging | SOD323 outline - allows high-density placement in space-constrained wearables and IoT sensor nodes |
Applications
| Microcontroller Reset Circuit | ADC Reference Bias |
|---|---|
|
Use Scenario: Providing clean, stable reset threshold for ultra-low-power MCUs during brown-out conditions. IC Role / Device Role / Timing Role: Zener clamps reset line voltage to 6.8 V, triggering POR logic when supply drops below threshold. Use Value: 50 µA regulation current minimizes battery drain while maintaining 1.2 mV/K drift control for reliable reset across temperature. |
Use Scenario: Generating a low-noise, temperature-stable reference voltage for 12-bit SAR ADCs in portable instrumentation. IC Role / Device Role / Timing Role: Functions as passive shunt reference, decoupled from digital switching noise via RC filtering. Use Value: Optimized leakage profile suppresses broadband noise, achieving <1 LSB error contribution over full operating range. |
| RF Front-End Bias Network | IoT Sensor Signal Conditioning |
|
Use Scenario: Supplying stable gate bias to low-noise RF amplifiers in sub-GHz ISM-band transceivers. IC Role / Device Role / Timing Role: Regulates bias rail independently of PA supply ripple, improving gain flatness and phase noise. Use Value: 100 pF capacitance at 0 V avoids resonance with matching networks; 80 Ω rdiff ensures minimal load-induced droop. |
Use Scenario: Setting reference voltage for op-amp-based thermistor or photodiode signal chains in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Provides fixed 6.8 V reference for ratiometric measurement against sensor bridge outputs. Use Value: ±5 % tolerance and 1.2 mV/K TC enable <±0.5 % total error budget over −20 °C to +70 °C operating range. |
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-B6V8 | ±2 % tolerance, 160 Ω rdiff at 5 mA, no optimized leakage profile | Better initial accuracy but higher impedance and uncontrolled noise performance | Select when absolute voltage precision outweighs noise sensitivity and low-current operation |
| MMSZ5235B | Same 6.8 V nominal, ±5 %, but rated at 200 mW and 350 Ω rdiff; SOD-123 package | Larger footprint, higher thermal resistance (500 K/W), unsuitable for ultra-dense layouts | Choose only if legacy SOD-123 compatibility or higher surge rating is required |
Compared with BZX38450-C6V8X, BZX384-B6V8 offers tighter voltage tolerance but sacrifices low-current stability and noise performance, while MMSZ5235B trades package size and thermal efficiency for broader distributor availability - making the C6V8X optimal for next-gen compact, low-noise analog designs.
Availability
BZX38450-C6V8X is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT edge nodes, and ultra-low-power MCU reset circuits requiring stable component supply across extended production lifecycles.
Supply support for BZX38450-C6V8X 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, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality systems.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-constrained applications demanding stable voltage references at microamp-level bias currents.
FAQ
What is the maximum reverse current at 6.8 V before regulation onset?
At 6.8 V reverse bias and Tj = 25 °C, the typical reverse current is 0.1 µA - verified in Table 8 under "Reverse current IR" for BZX38450-C6V8. This ultra-low leakage ensures minimal standby power loss in always-on sensor nodes and extends battery life in multi-year deployments.
Can BZX38450-C6V8X be used in series for higher voltage references?
No - the device is not characterized for series operation. Its specified parameters assume single-diode use in shunt configuration. Series stacking introduces mismatched temperature coefficients and uncontrolled leakage interactions, violating the ±5 % tolerance guarantee and risking thermal runaway under bias.
Is the 50 µA test current mandatory for achieving 6.8 V regulation?
No - regulation occurs across 10 µA to 5 mA, but 6.8 V is guaranteed only at 50 µA per datasheet definition. At 5 mA, VZ rises to 6.94 V (max), reflecting the 80 Ω differential resistance; design must account for this 140 mV shift under load.
Does the "optimized fast switching" feature affect DC regulation accuracy?
No - the intentional leakage increase per AN90031 is confined to transient behavior and does not alter DC Zener voltage, tolerance, or temperature coefficient. DC specifications remain fully compliant with Table 8 values across the full operating temperature range.
BZX38450-C6V8X 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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.1 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-C6V8X FAQ
1.How can I place an order for BZX38450-C6V8X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C6V8X 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-C6V8X reliable?
The price and inventory of BZX38450-C6V8X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C6V8X is usually 5 days.
3.What payment methods are accepted for BZX38450-C6V8X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C6V8X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C6V8X?
BZX38450-C6V8X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C6V8X 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-C6V8X?
For technical support, including BZX38450-C6V8X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C6V8X requirements.
6.How does Aetrix verify that BZX38450-C6V8X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C6V8X 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-C6V8X meets industry standards.
7.What is the process for return or replacement of BZX38450-C6V8X?
All BZX38450-C6V8X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C6V8X, 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-C6V8X part is unused and in its original packaging.
Return procedure for BZX38450-C6V8X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C6V8X 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…
