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Nexperia USA Inc. BZX58550-C3V0-QX
- Part No.:
- BZX58550-C3V0-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C3V0-QX.pdf
- Description:
- DIODE ZENER 3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:596
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Product details
Overview
BZX58550-C3V0-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, battery-powered systems. It delivers a nominal 3.0 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω dynamic impedance at 5 mA, and 0.8 µA max reverse leakage at 2.85 V.
For engineers reviewing the BZX58550-C3V0-Q datasheet, BZX58550-C3V0-Q pinout, BZX58550-C3V0-Q application, or BZX58550-C3V0-Q equivalent, key selection criteria include low-test-current regulation stability, AEC-Q101 qualification for automotive environments, ultra-small SOD523 footprint, and optimized noise performance via controlled leakage characteristics.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.85 V to 3.15 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance ≤600 Ω at 5 mA. Its low 50 µA test current enables stable regulation in micro-power circuits where quiescent current must be minimized.
The device integrates intentional minor leakage current rise per AN90031 to reduce switching noise and improve transient response-distinct from standard Zeners-and is qualified to AEC-Q101 for under-hood automotive use, with junction temperature rated to 150 °C and thermal resistance Rth(j-a) as low as 285 K/W on optimized PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V (min 2.85 V / max 3.15 V at IZ = 50 µA); enables precise low-voltage rail clamping in 3.3 V or lower logic domains |
| Tolerance | ±2 % (C-series); ensures tight voltage accuracy without post-production trimming in production-grade references |
| Dynamic Impedance | ≤600 Ω at IZ = 5 mA; maintains regulation stability under small-signal load variations in sensor bias networks |
| Reverse Leakage | ≤0.8 µA at VR = 2.85 V; minimizes standby power loss in always-on battery monitoring circuits |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper; supports continuous operation in compact automotive ECUs |
| Package | SOD523 (SC-79); 1.2 × 0.8 × 0.6 mm body size enables placement in high-density PCB layouts with <1.0 mm pitch constraints |
| AEC-Q101 Qualified | Yes; validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces |
Pinout & Package
Manufactured in the SOD523 (SC-79) ultra-small surface-mount plastic package, this two-terminal Zener diode features a cathode-marked anode-cathode configuration optimized for automated placement and reflow soldering on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to regulated output node; marking bar identifies polarity for automated optical inspection and orientation-sensitive routing |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction enabling Zener breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable voltage reference in nanoamp-level standby circuits without compromising regulation accuracy |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - reduces high-frequency noise and improves transient settling in analog sensor front-ends |
| AEC-Q101 qualification | Qualified for automotive grade-1 (−40 °C to +125 °C ambient) - supports deployment in engine control, lighting, and infotainment modules |
| Ultra-compact SOD523 package | 1.2 mm × 0.8 mm footprint - allows placement adjacent to ICs in space-limited modules such as TPMS sensors and LIN transceivers |
| Thermal robustness | Rth(j-a) = 285 K/W with 1 cm² cathode pad - sustains 200 mA peak forward current without thermal runaway in pulse-biased applications |
Applications
| Automotive Sensor Biasing | Portable Device Voltage Reference |
|---|---|
|
Use Scenario: Providing stable 3.0 V bias to MEMS pressure sensors in tire pressure monitoring systems (TPMS). IC Role / Device Role / Timing Role: Zener voltage reference establishing accurate analog front-end operating point. Use Value: ±2 % tolerance and low 50 µA test current ensure sensor offset stability over temperature and battery discharge, extending operational life beyond 10 years. |
Use Scenario: Generating a precision reference for ADC calibration in Bluetooth earbuds with coin-cell power. IC Role / Device Role / Timing Role: Low-quiescent-current shunt regulator supplying reference voltage to SAR ADC input stage. Use Value: 0.8 µA max reverse leakage at 2.85 V minimizes drain on CR2032 cells, enabling >200 hours of active listening per charge cycle. |
| Industrial IoT Node Regulation | USB-C Power Negotiation Interface |
|
Use Scenario: Regulating supply to LoRaWAN transceiver bias circuitry in remote environmental monitors. IC Role / Device Role / Timing Role: Low-power shunt regulator maintaining stable 3.0 V for RF front-end LDO enable logic. Use Value: AEC-Q101 qualification ensures reliability across −40 °C to +85 °C outdoor deployments, while SOD523 footprint saves board area for multi-sensor integration. |
Use Scenario: Clamping CC line voltage during USB PD communication handshake in portable chargers. IC Role / Device Role / Timing Role: Fast-response Zener protecting USB-C controller GPIO from ESD-induced overvoltage spikes. Use Value: Optimized leakage profile reduces signal distortion on 300 kbps BMC-encoded CC line, preserving PD negotiation integrity. |
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-B3V0-Q | ±5 % tolerance (vs. ±2 %), higher typical leakage (1.0 µA vs. 0.8 µA), same SOD523 package and 3.0 V nominal | Acceptable in non-critical biasing where cost sensitivity outweighs accuracy; not recommended for ADC references or automotive Grade-1 | Select only when budget constraints dominate and tighter regulation is unnecessary |
| MMSZ5226ET1G | Same 3.0 V nominal, ±5 % tolerance, SOD-123 package (2.7 × 1.6 mm), 500 mW Ptot, no AEC-Q101 qualification | Larger footprint limits high-density designs; lacks automotive qualification and low-leakage optimization for noise-sensitive analog paths | Use only in industrial or consumer applications where AEC-Q101 is not required and board space permits larger package |
Compared with BZX58550-B3V0-Q, the C3V0-Q offers tighter regulation and lower leakage for precision analog functions; compared with MMSZ5226ET1G, it provides AEC-Q101 compliance, smaller footprint, and noise-optimized leakage behavior-making it uniquely suited for automotive and ultra-compact battery-powered systems.
Availability
BZX58550-C3V0-Q is available at Aetrix Electronics and suitable for automotive sensor biasing, portable device voltage reference, and industrial IoT node regulation requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for BZX58550-C3V0-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 high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and mobile markets with AEC-Q101-qualified components.
The BZX58550-Q series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for ultra-low-power voltage reference and biasing in space-constrained, battery-operated, and automotive-grade applications.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX58550-C3V0-Q is specified for nominal Zener voltage of 3.0 V at 50 µA, with minimum breakdown voltage of 2.85 V and maximum of 3.15 V. Its absolute maximum reverse voltage is not defined independently-it operates in controlled Zener breakdown above ~2.85 V; exceeding 3.15 V under unregulated conditions risks exceeding power limits and thermal stress.
Is this diode suitable for use in a 3.3 V microcontroller I/O protection circuit?
Yes-configured as a shunt clamp between I/O line and ground, it limits voltage to ≤3.15 V during overvoltage events. Its 600 Ω dynamic impedance and fast response (enabled by optimized leakage) provide effective transient suppression, though external series resistance must be selected to limit peak current to ≤200 mA per absolute maximum ratings.
How does the "intentional minor rise of leakage current" improve performance?
Per AN90031, this controlled leakage increase reduces junction capacitance modulation during switching transients, lowering high-frequency noise generation and improving settling time in analog reference paths-particularly beneficial in sensor biasing and ADC reference applications where signal integrity is critical.
Can this part replace a 3.3 V Zener in an existing design?
No-BZX58550-C3V0-Q is a 3.0 V nominal device (2.85–3.15 V range). Substituting it for a 3.3 V Zener would result in undershoot of the target regulation voltage, potentially causing logic-level incompatibility or insufficient gate drive in MOSFET bias circuits. Use BZX58550-C3V3-Q for 3.3 V applications.
BZX58550-C3V0-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 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 800 nA @ 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-C3V0-QX FAQ
1.How can I place an order for BZX58550-C3V0-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C3V0-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-C3V0-QX reliable?
The price and inventory of BZX58550-C3V0-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-C3V0-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C3V0-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C3V0-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C3V0-QX?
BZX58550-C3V0-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C3V0-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-C3V0-QX?
For technical support, including BZX58550-C3V0-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C3V0-QX requirements.
6.How does Aetrix verify that BZX58550-C3V0-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C3V0-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-C3V0-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C3V0-QX?
All BZX58550-C3V0-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C3V0-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-C3V0-QX part is unused and in its original packaging.
Return procedure for BZX58550-C3V0-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C3V0-QX Tags
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MM5Z5V1ST1G
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