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Nexperia USA Inc. BZX58550-C3V3-QX
- Part No.:
- BZX58550-C3V3-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C3V3-QX.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,724
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Product details
Overview
BZX58550-C3V3-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, rated for 3.3 V ±5 % nominal regulation at 50 µA test current, with 300 mW total power dissipation and 0.9 V forward voltage at 10 mA - designed for precision biasing and voltage reference in space-constrained, battery-powered automotive and portable electronics.
For engineers reviewing the BZX58550-C3V3-Q datasheet, BZX58550-C3V3-Q pinout, BZX58550-C3V3-Q application, or BZX58550-C3V3-Q equivalent, this page delivers verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data, cathode/anode terminal mapping, and automotive-grade leakage behavior per AN90031.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable 3.3 V output across load variations by conducting reverse current above its breakdown threshold. Its specified 50 µA test current enables ultra-low quiescent operation ideal for standby circuits and sensor bias rails.
The C-series variant exhibits intentionally elevated leakage current versus B-series to improve switching speed and reduce noise in dynamic regulation paths, while retaining tight 3.3 V tolerance and AEC-Q101 qualification for under-hood automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.3 V ±5 % at IZ = 50 µA - defines precise reference point for low-power analog sensing and microcontroller reset thresholds |
| Forward Voltage | 0.9 V max at IF = 10 mA - ensures minimal drop in series bias configurations and low-loss reverse-polarity protection |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper - supports continuous operation in compact automotive modules without forced cooling |
| Differential Resistance | 600 Ω max at IZ = 50 µA - indicates moderate regulation stiffness suitable for non-critical reference applications |
| Reverse Current | 1.5 µA max at VR = 3.0 V - confirms low leakage below regulation threshold, critical for battery runtime preservation |
| Junction Temperature | −55 °C to +150 °C - enables deployment in engine control units, ADAS sensors, and industrial temperature extremes |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
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 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal - must be tied to higher potential side of Zener operation |
| 2 | Anode (A) | Connected to ground or lower potential reference; reverse-biased current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in micropower systems where supply current budgets are sub-100 µA |
| Automotive qualification | AEC-Q101 compliant - meets stress test requirements for automotive electronics including high-temperature reverse bias and thermal cycling |
| Optimized leakage behavior | C-series intentional minor leakage rise - reduces switching transients and broadband noise in feedback loops without sacrificing regulation accuracy |
| Ultra-compact footprint | SOD523 package (1.2 × 0.8 mm) - saves PCB area in dense layouts such as camera modules, radar front-ends, and ECU sensor interfaces |
| Thermal performance | Rth(j-a) = 350 K/W with 35 mm² cathode copper - allows reliable 300 mW dissipation without heatsinking in standard FR4 assemblies |
Applications
| Automotive Sensor Biasing | Portable Device Reset Circuit |
|---|---|
Use Scenario: Providing stable 3.3 V reference to MEMS pressure sensors in engine manifold modules. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing fixed bias point for analog front-end amplification and ADC reference scaling. Use Value: Maintains sensor accuracy across −40 °C to +125 °C ambient while drawing only 50 µA - extending battery life in wireless tire pressure monitors. |
Use Scenario: Generating clean reset signal for Bluetooth SoCs in hearing aids and wearables. IC Role / Device Role / Timing Role: Zener-clamped voltage detector triggering POR (power-on reset) logic when supply rises above 3.3 V. Use Value: Low 0.9 V forward drop prevents false resets during brown-out recovery; ±5 % tolerance ensures deterministic reset threshold timing. |
| Industrial IoT Node Reference | USB-C Power Negotiation Clamp |
Use Scenario: Supplying precision reference to low-power LoRaWAN transceiver ADCs in smart metering endpoints. IC Role / Device Role / Timing Role: Low-current voltage reference source for internal bandgap calibration and supply monitoring. Use Value: 1.5 µA max reverse leakage at 3.0 V preserves battery autonomy over 10-year deployments; AEC-Q101 grade assures field reliability. |
Use Scenario: Clamping CC line voltage during USB-C PD negotiation to prevent overvoltage damage to controller ICs. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting CC pin to 3.3 V during hot-plug events and protocol handshaking. Use Value: Elevated C-series leakage improves transient response time versus B-series, reducing risk of communication timeout during voltage spikes. |
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-B3V3-Q | Same 3.3 V nominal rating but ±2 % tolerance and lower leakage (0.8 µA max at 3.0 V) | Better regulation accuracy for precision references; slower switching due to reduced leakage | Select for metrology-grade biasing where stability outweighs noise sensitivity |
| MMSZ5226B-7-F | 3.3 V ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, 10 µA IR at 2.64 V | Larger footprint and higher leakage - suited for non-automotive consumer boards with relaxed size constraints | Choose when board-level thermal margin exceeds 300 mW and AEC-Q101 is not required |
Compared with BZX58550-B3V3-Q, the C3V3-Q trades tighter tolerance for faster switching and lower noise; versus MMSZ5226B-7-F, it delivers 44 % smaller footprint and automotive qualification at the cost of 167 mW lower power headroom.
Availability
BZX58550-C3V3-Q is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical devices, industrial IoT nodes, and USB-C interface protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX58550-C3V3-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 mobile markets.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current voltage regulation in space- and power-constrained automotive subsystems and portable electronics.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX58550-C3V3-Q has a nominal Zener voltage of 3.3 V with ±5 % tolerance, meaning breakdown occurs between 3.13 V and 3.47 V at 50 µA test current. Its absolute maximum reverse voltage is not defined - operation beyond the specified VZ range risks uncontrolled conduction and thermal runaway unless current-limited externally.
Does this part require a series resistor in typical Zener regulator configurations?
Yes - a current-limiting resistor is mandatory to set the operating current within the 50 µA to 200 mA range. For 3.3 V regulation from a 5 V supply, a 33 Ω resistor delivers ~52 mA, staying within the 300 mW power limit and optimizing differential resistance for stable regulation.
How does the C-series differ electrically from the B-series at the same voltage rating?
The C-series (e.g., BZX58550-C3V3-Q) features intentionally increased reverse leakage current versus the B-series (e.g., BZX58550-B3V3-Q) to improve switching speed and reduce high-frequency noise - confirmed in application note AN90031 - while maintaining identical nominal voltage and tolerance.
Can this diode be used in bidirectional ESD protection applications?
No - the BZX58550-C3V3-Q is a unidirectional Zener diode optimized for DC voltage regulation, not transient suppression. Its 40 W non-repetitive peak power rating applies only to controlled reverse surges, not ESD pulses; dedicated TVS diodes like PESD5V0S1BA should be used for IEC 61000-4-2 compliance.
BZX58550-C3V3-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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 1.5 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-C3V3-QX FAQ
1.How can I place an order for BZX58550-C3V3-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C3V3-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-C3V3-QX reliable?
The price and inventory of BZX58550-C3V3-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-C3V3-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C3V3-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C3V3-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C3V3-QX?
BZX58550-C3V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C3V3-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-C3V3-QX?
For technical support, including BZX58550-C3V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C3V3-QX requirements.
6.How does Aetrix verify that BZX58550-C3V3-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C3V3-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-C3V3-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C3V3-QX?
All BZX58550-C3V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C3V3-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-C3V3-QX part is unused and in its original packaging.
Return procedure for BZX58550-C3V3-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C3V3-QX Tags
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MM5Z5V1ST1G
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