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Nexperia USA Inc. BZX58550-B6V8X
- Part No.:
- BZX58550-B6V8X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B6V8X.pdf
- Description:
- DIODE ZENER 6.8V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,979
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Product details
Overview
BZX58550-B6V8X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) 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 ±2 % 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 BZX58550-B6V8X datasheet, BZX58550-B6V8X pinout, BZX58550-B6V8X application, or BZX58550-B6V8X equivalent, key selection criteria include its 50 µA regulation point, ultra-small SOD523 footprint, low leakage (<0.1 µA at VR = 5.1 V), and optimized fast-switching behavior per AN90031.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 6.66 V to 6.94 V at IZ = 50 µA, and maintains regulation down to 5.1 V reverse bias with <0.1 µA leakage. Its differential resistance drops to 15 Ω at IZ = 5 mA, supporting stable reference performance under light load variations.
The device features intentional minor leakage rise (per AN90031) to improve switching speed and reduce noise in signal conditioning paths. Thermal resistance from junction to ambient is 350 K/W on FR4 PCB with 35 mm² cathode copper area, enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.8 V at IZ = 50 µA - defines precise low-bias reference point for MCU brown-out detection |
| Voltage Tolerance | ±2 % - ensures tight regulation window (6.66 V–6.94 V) without post-production trimming |
| Differential Resistance | 80 Ω at IZ = 50 µA; 15 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient | +1.2 mV/K - enables predictable drift compensation in temperature-stable references |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA - supports use as clamp or level shifter in bidirectional protection schemes |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode Cu - sets maximum continuous bias current limit (~44 mA at 6.8 V) |
| Reverse Leakage | <0.1 µA at VR = 5.1 V - critical for ultra-low-quiescent-current battery monitoring circuits |
Pinout & Package
Package: SOD523 (SC-79), ultra-small surface-mount plastic package measuring 1.2 mm × 0.8 mm × 0.6 mm, with flat lead profile optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to regulated voltage node; marking bar identifies polarity for correct orientation during placement |
| 2 | Anode (A) | Ground or lower-potential reference point; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - enables direct connection to high-impedance nodes (e.g., comparator inputs, ADC references) without loading |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise in analog front-ends |
| Ultra-compact footprint | SOD523 (1.2 × 0.8 mm) - saves >60 % board area vs. SOD323, critical for wearables and hearing aids |
| Stable thermal performance | Rth(j-a) = 350 K/W with 35 mm² cathode Cu - allows predictable derating in thermally constrained modules |
| Two-tolerance series | ±2 % (B-series) and ~±5 % (C-series) - supports cost-sensitive vs. precision design trade-offs within same footprint |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
Use Scenario: Providing clean, stable reset threshold for ultra-low-power MCUs in coin-cell-powered IoT nodes. IC Role / Device Role / Timing Role: Zener voltage reference setting trip point for external reset supervisor IC or internal brown-out detector. Use Value: 50 µA regulation current minimizes battery drain; ±2 % tolerance ensures deterministic reset voltage across temperature. |
Use Scenario: Supplying bias voltage to MEMS accelerometer analog front-end in wearable health monitors. IC Role / Device Role / Timing Role: Low-noise voltage reference source for signal chain DC offset calibration. Use Value: Optimized leakage profile per AN90031 suppresses switching noise that would otherwise corrupt sub-mV sensor signals. |
| RF Front-End Protection | USB-C Port Voltage Clamp |
Use Scenario: Clamping transient spikes on RF amplifier bias rails in Bluetooth LE modules. IC Role / Device Role / Timing Role: Fast-reacting Zener clamp absorbing ESD-induced overvoltage before reaching sensitive GaAs FET gates. Use Value: 0.9 V forward voltage limits positive excursions; 300 mW power rating handles short-duration RF coupling events. |
Use Scenario: Regulating VCONN supply voltage for USB-C e-marked cables in portable docking stations. IC Role / Device Role / Timing Role: Precision 6.8 V shunt regulator maintaining VCONN within ±5 % of spec under variable load. Use Value: 80 Ω dynamic impedance ensures <10 mV droop from 0–10 mA VCONN load variation, meeting USB PD 3.0 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 |
|---|---|---|---|
| BZX58550-C6V8 | ±5 % tolerance (6.46–7.14 V), higher leakage (~0.1 µA at VR = 5.1 V) | Acceptable where cost priority outweighs precision; less suitable for reset thresholding | Select when budget constraints dominate and 5 % regulation window is acceptable |
| MMSZ5236B-7-F | Same 6.8 V nominal, ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot | Larger footprint; higher power handling but poorer thermal resistance (500 K/W) | Choose only if board layout permits larger package and higher dissipation is required |
Compared with BZX58550-B6V8X, the C6V8 variant trades regulation accuracy for cost, while MMSZ5236B-7-F sacrifices miniaturization and thermal efficiency for higher power margin - making the B-series SOD523 optimal for space- and current-constrained portable designs.
Availability
BZX58550-B6V8X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset circuits, RF front-end protection, and USB-C VCONN regulation requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX58550-B6V8X 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 discrete, logic, and MOSFET devices with focus on efficiency and miniaturization.
The BZX58550 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for ultra-low-power biasing and precision voltage referencing in battery-operated and space-constrained electronics.
FAQ
What is the maximum continuous reverse current this diode can handle at 6.8 V?
The BZX58550-B6V8X is rated for 300 mW total power dissipation at Tamb ≤ 25 °C with adequate copper area. At 6.8 V, this corresponds to a maximum continuous reverse current of approximately 44 mA. Derating is required above 25 °C ambient per the 350 K/W thermal resistance specification.
Can this Zener be used in forward conduction mode as a regular diode?
Yes - its forward voltage is guaranteed ≤ 0.9 V at 10 mA, making it usable as a low-drop clamp or level shifter. However, its primary design intent and characterization are for reverse-bias Zener operation; forward characteristics are secondary and not optimized for rectification.
How does the "intentional minor rise of leakage current" improve performance?
Per application note AN90031, the controlled leakage increase reduces minority-carrier storage time, enabling faster turn-off and lower switching noise - particularly beneficial in analog signal paths and high-frequency bias networks where conventional Zeners induce ringing or jitter.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes - Nexperia provides a dedicated reflow footprint (Fig. 10) for SOD523 with 0.5 mm pad width and 0.4 mm solder mask clearance. The device is qualified for JEDEC J-STD-020 moisture sensitivity level 1 and withstands peak reflow temperatures up to 260 °C.
BZX58550-B6V8X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX58550
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±2%
- Power - Max:
- 270 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-523
BZX58550-B6V8X FAQ
1.How can I place an order for BZX58550-B6V8X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B6V8X 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 BZX58550-B6V8X reliable?
The price and inventory of BZX58550-B6V8X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B6V8X is usually 5 days.
3.What payment methods are accepted for BZX58550-B6V8X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B6V8X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B6V8X?
BZX58550-B6V8X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B6V8X 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 BZX58550-B6V8X?
For technical support, including BZX58550-B6V8X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B6V8X requirements.
6.How does Aetrix verify that BZX58550-B6V8X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B6V8X 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 BZX58550-B6V8X meets industry standards.
7.What is the process for return or replacement of BZX58550-B6V8X?
All BZX58550-B6V8X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B6V8X, 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 BZX58550-B6V8X part is unused and in its original packaging.
Return procedure for BZX58550-B6V8X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B6V8X Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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