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Nexperia USA Inc. BZX58550-C6V8-QX
- Part No.:
- BZX58550-C6V8-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C6V8-QX.pdf
- Description:
- DIODE ZENER 6.8V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:13,316
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Product details
Overview
BZX58550-C6V8-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in space-constrained, 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 AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX58550-C6V8-Q datasheet, BZX58550-C6V8-Q pinout, BZX58550-C6V8-Q application, or BZX58550-C6V8-Q equivalent, this device is selected for ultra-low-current voltage stabilization in battery-powered sensors, ECU reference rails, and portable instrumentation where thermal footprint and leakage sensitivity are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 6.46 V (min) to 7.14 V (max) at IZ = 50 µA, exhibiting a temperature coefficient of +1.2 mV/K and diode capacitance of 100 pF at 0 V. Its low 50 µA test current enables stable regulation under micro-power conditions without significant self-heating.
The device features intentional minor leakage optimization per AN90031 for fast switching transients and reduced noise in signal conditioning paths. Thermal resistance from junction to ambient is 350 K/W on a 35 mm² copper pad, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.8 V - precise DC reference point at 50 µA, enabling accurate low-bias rail generation |
| Voltage Tolerance | ±2 % - tight regulation window (6.46 V to 7.14 V) for high-accuracy analog subsystems |
| Differential Resistance | 80 Ω at 5 mA - low dynamic impedance ensures minimal output voltage shift under load variation |
| Forward Voltage | 0.9 V at 10 mA - predictable conduction threshold for polarity-sensitive protection or clamping |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous operation in compact PCB layouts with defined copper area |
| Leakage Current | ≤ 5.1 µA at VR = 5.1 V - optimized low-leakage behavior improves battery life in always-on circuits |
| Temperature Coefficient | +1.2 mV/K - positive drift compensates for negative TC components in mixed-signal references |
Pinout & Package
Package: SOD523 (SC-79), ultra-small surface-mount plastic package measuring 1.2 mm × 0.8 mm × 0.6 mm with flat leads and cathode marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration establishes Zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low test current | 50 µA - enables stable regulation in µA-level bias networks without loading sensitive sources |
| AEC-Q101 qualification | Qualified for automotive applications - validated for temperature cycling, HTRB, and ESD robustness per discrete semiconductor standard |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response in feedback loops |
| Tight voltage tolerance | ±2 % - eliminates need for post-assembly trimming in production-grade sensor reference designs |
| Miniature SOD523 footprint | 1.2 mm × 0.8 mm - saves >60 % board area vs. SOD323, critical for wearables and compact ECUs |
Applications
| Automotive Cabin Sensor Reference | Portable Medical Pulse Oximeter Bias |
|---|---|
Use Scenario: Providing stable 6.8 V reference for analog front-end amplifiers in HVAC cabin air quality sensors. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precision bias point for op-amp input stages and ADC reference dividers. Use Value: ±2 % tolerance and +1.2 mV/K TC enable <10 ppm/°C total reference drift over −40 °C to +125 °C, meeting ASIL-B functional safety margins. |
Use Scenario: Supplying regulated bias to photodiode transimpedance amplifier in battery-powered pulse oximeters. IC Role / Device Role / Timing Role: Low-current Zener regulator maintaining constant photocurrent conversion gain independent of battery discharge. Use Value: 50 µA test current and 5.1 µA max leakage at 5.1 V extend single-cell coin-cell life beyond 12 months in standby mode. |
| Industrial IoT Node Power Monitor | Smartphone Proximity Sensor Calibration |
Use Scenario: Generating reference voltage for supply rail monitoring circuitry in LoRaWAN-enabled environmental sensors. IC Role / Device Role / Timing Role: Precision shunt regulator feeding comparator input to detect brown-out events on 3.3 V system rail. Use Value: 80 Ω differential resistance ensures <5 mV error across 0–100 µA load swing, enabling reliable 2 % undervoltage detection. |
Use Scenario: Stabilizing IR LED driver bias in smartphone proximity sensors during display-on transitions. IC Role / Device Role / Timing Role: Fast-switching Zener clamp suppressing EMI-induced transients on analog sensor supply lines. Use Value: Optimized leakage profile per AN90031 reduces 10–100 MHz noise floor by 8 dB, preventing false proximity triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B6V8-Q | Same 6.8 V nominal voltage but ±5 % tolerance (6.08–6.94 V) and higher 160 Ω rdiff at 5 mA | Suitable for non-critical biasing where cost sensitivity outweighs accuracy requirements | Select when ±5 % regulation and higher dynamic impedance are acceptable for cost-driven consumer designs |
| MMSZ5235B-7-F | 6.8 V nominal, ±5 %, 500 mW Ptot, SOD-123 package (2.7 mm × 1.4 mm), 100 Ω rdiff | Higher power handling but 3.4× larger footprint; not AEC-Q101 qualified | Choose only if board space allows larger package and automotive qualification is not required |
Compared with BZX58550-B6V8-Q, the C-series offers tighter tolerance and lower impedance for precision analog use; versus MMSZ5235B-7-F, it provides AEC-Q101 compliance and 60 % smaller footprint at the cost of 33 % lower power rating.
Availability
BZX58550-C6V8-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical devices, industrial IoT nodes, and smartphone proximity systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX58550-C6V8-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, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade reliability.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-accuracy voltage reference in space- and power-constrained automotive and portable electronics.
FAQ
What is the maximum reverse current at 5.1 V for BZX58550-C6V8-Q?
The maximum reverse current (leakage) is 5.1 µA at VR = 5.1 V and Tj = 25 °C, as specified in Table 8 of the datasheet. This value reflects the intentional minor leakage optimization for noise reduction and fast switching, consistent with AN90031 design guidance.
Can BZX58550-C6V8-Q be used in place of a 6.8 V Zener with ±5 % tolerance?
Yes, but only where tighter regulation is beneficial. The C-series has ±2 % tolerance (6.46–7.14 V) versus ±5 % (6.08–6.94 V) for the B-series. Substitution requires verifying that downstream circuitry tolerates the narrower voltage window and lower dynamic impedance (80 Ω vs. 160 Ω).
Does the SOD523 package require special soldering profiles?
Yes. The recommended reflow footprint (Fig. 10) specifies 0.4 mm solder lands and 1.4 mm occupied area. Peak temperature must not exceed 260 °C for ≤ 30 seconds, and thermal resistance modeling assumes 35 mm² copper at the cathode tab to achieve the rated 300 mW dissipation.
Is BZX58550-C6V8-Q suitable for reverse polarity protection?
No. It is a Zener diode optimized for reverse-biased voltage regulation, not forward-conducting protection. Its 0.9 V forward voltage at 10 mA is insufficient for robust reverse polarity blocking; dedicated protection diodes or MOSFET-based solutions are required for that function.
BZX58550-C6V8-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-C6V8-QX FAQ
1.How can I place an order for BZX58550-C6V8-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C6V8-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 BZX58550-C6V8-QX reliable?
The price and inventory of BZX58550-C6V8-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C6V8-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C6V8-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C6V8-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C6V8-QX?
BZX58550-C6V8-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C6V8-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 BZX58550-C6V8-QX?
For technical support, including BZX58550-C6V8-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C6V8-QX requirements.
6.How does Aetrix verify that BZX58550-C6V8-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C6V8-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 BZX58550-C6V8-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C6V8-QX?
All BZX58550-C6V8-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C6V8-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 BZX58550-C6V8-QX part is unused and in its original packaging.
Return procedure for BZX58550-C6V8-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C6V8-QX Tags
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