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Nexperia USA Inc. BZX58550-B6V8-QX
- Part No.:
- BZX58550-B6V8-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B6V8-QX.pdf
- Description:
- DIODE ZENER 6.8V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,211
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Product details
Overview
BZX58550-B6V8-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 6.66 V to 6.94 V nominal regulation at 50 µA test current, with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and 5.1 mV/K temperature coefficient - optimized for precision biasing in automotive sensor interfaces and portable battery-powered voltage references.
For engineers reviewing the BZX58550-B6V8-Q datasheet, BZX58550-B6V8-Q pinout, BZX58550-B6V8-Q application, or BZX58550-B6V8-Q equivalent, this device supports low-power analog signal conditioning, ECU reference stabilization, and ultra-low-quiescent current voltage clamping where tight regulation at microamp-level bias is required.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA, enabling stable reference generation in circuits with minimal standby current draw. Its 80 Ω dynamic impedance at 5 mA ensures predictable voltage deviation under light load transients.
Qualified to AEC-Q101, it features intentional leakage optimization per AN90031 for reduced noise and faster switching response - distinct from standard Zeners - making it suitable for automotive-grade analog front-ends requiring both stability and transient fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.66 V to 6.94 V at IZ = 50 µA - defines precise regulation point for low-bias reference circuits |
| Tolerance | ±2 % (B-series) - enables high-accuracy voltage setting without post-calibration |
| Differential Resistance | 80 Ω at IZ = 5 mA - limits output voltage shift under small load variations |
| Temperature Coefficient | +1.2 mV/K - provides near-zero TC operation near room temperature for stable references |
| Forward Voltage | ≤0.9 V at IF = 10 mA - ensures low-loss conduction when used bidirectionally or as clamp |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - sets thermal derating boundary for PCB layout |
| Junction Temperature | −55 °C to +150 °C - supports operation across full automotive ambient range |
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 and cathode marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal - critical for correct polarity in reverse-bias regulation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; forms the reference return path for Zener current flow |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor supplies |
| Low test current operation | Specified at 50 µA - enables use in nanoamp-level standby circuits without compromising regulation accuracy |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - reduces switching noise and improves transient response in feedback paths |
| Ultra-compact SOD523 footprint | 1.2 mm × 0.8 mm body - saves board space in dense automotive ECUs and wearable medical sensors |
| Stable temperature coefficient | +1.2 mV/K near 25 °C - minimizes drift in battery-powered instrumentation over operating temperature range |
Applications
| Automotive Sensor Reference | Portable Medical Device Bias |
|---|---|
|
Use Scenario: Providing stable 6.8 V reference for MEMS pressure sensor signal conditioning in engine manifold modules. IC Role / Device Role / Timing Role: Zener regulator establishing precision analog reference voltage for ADC input scaling and op-amp biasing. Use Value: ±2 % tolerance and +1.2 mV/K TC ensure <±10 mV total drift over −40 °C to +125 °C, meeting ASIL-B sensor accuracy requirements. |
Use Scenario: Generating low-noise bias for ultra-low-power ECG amplifier stages in disposable patch monitors. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator supplying clean reference to rail-to-rail input op-amps. Use Value: 50 µA test current and optimized leakage enable <1 µA quiescent draw while maintaining 6.8 V stability across battery discharge (2.8–4.2 V). |
| IoT Node Voltage Clamp | Industrial PLC Input Protection |
|
Use Scenario: Clamping 3.3 V logic supply against ESD transients in NB-IoT cellular modems. IC Role / Device Role / Timing Role: Fast-response Zener acting as low-energy overvoltage protector on microcontroller supply rail. Use Value: 80 Ω dynamic impedance and SC-79 thermal mass limit clamping overshoot to <50 mV during 2 kV HBM events. |
Use Scenario: Stabilizing 24 V DC input stage of modular PLC digital input cards exposed to field wiring surges. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining reference for optocoupler LED drive current control. Use Value: 300 mW power rating and −55 °C to +150 °C junction range support continuous operation in industrial enclosures up to 85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C6V8-Q | ±5 % tolerance, higher leakage, 100 Ω rdiff at 5 mA | Accepts wider voltage variation; suited for non-critical bias where cost sensitivity outweighs precision | Select when ±5 % regulation suffices and lower unit cost is prioritized over TC stability |
| MMSZ5234B-7-F | 6.8 V ±5 %, SOD-123 package (2.7 mm × 1.4 mm), 100 Ω rdiff, no AEC-Q101 qualification | Larger footprint; lacks automotive qualification and low-leakage optimization | Use only in commercial-grade applications where AEC compliance and noise performance are not required |
Compared with BZX58550-C6V8-Q, the BZX58550-B6V8-Q delivers tighter tolerance and lower dynamic impedance for precision references; versus MMSZ5234B-7-F, it offers automotive qualification, smaller size, and application-specific leakage tuning - critical for noise-sensitive automotive and portable designs.
Availability
BZX58550-B6V8-Q is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical devices, IoT edge nodes, and industrial PLC input stages requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-B6V8-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 focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for low-current, low-noise voltage regulation in space-constrained automotive and portable electronics.
FAQ
What is the maximum reverse current at 6.8 V for BZX58550-B6V8-Q?
At VR = 6.8 V and Tj = 25 °C, the typical reverse current is 0.1 µA, with a maximum of 0.5 µA per datasheet Table 8. This ultra-low leakage supports nanoamp-level standby operation in battery-powered systems without degrading regulation accuracy.
Can BZX58550-B6V8-Q be used in forward conduction mode?
Yes - its forward voltage is specified ≤0.9 V at 10 mA, making it suitable as a low-drop clamp or level-shifter. However, its primary design intent is reverse-bias Zener regulation; forward use should respect IF ≤ 200 mA absolute maximum rating and thermal limits.
How does the "intentional minor rise of leakage current" improve performance?
Per AN90031, this controlled leakage enhancement reduces minority-carrier lifetime effects, lowering switching noise and improving transient response time - particularly beneficial in feedback loops of LDOs or sensor amplifiers where fast settling and low broadband noise are critical.
Is the SOD523 package compatible with standard reflow profiles?
Yes - Nexperia provides a validated reflow soldering footprint (Fig. 10) and recommends JEDEC J-STD-020-compliant profiles. Peak temperature must not exceed 260 °C, and thermal resistance from junction to solder point is 65 K/W, supporting robust assembly on FR4 PCBs with standard stencil designs.
BZX58550-B6V8-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX58550-Q
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-B6V8-QX FAQ
1.How can I place an order for BZX58550-B6V8-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B6V8-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-B6V8-QX reliable?
The price and inventory of BZX58550-B6V8-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-B6V8-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B6V8-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B6V8-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B6V8-QX?
BZX58550-B6V8-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B6V8-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-B6V8-QX?
For technical support, including BZX58550-B6V8-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B6V8-QX requirements.
6.How does Aetrix verify that BZX58550-B6V8-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B6V8-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-B6V8-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B6V8-QX?
All BZX58550-B6V8-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B6V8-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-B6V8-QX part is unused and in its original packaging.
Return procedure for BZX58550-B6V8-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B6V8-QX Tags
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MMSZ5231B-7-F
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MMSZ4682T1G
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MM5Z5V1ST1G
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