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Nexperia USA Inc. BZX58550-B3V0-QX
- Part No.:
- BZX58550-B3V0-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B3V0-QX.pdf
- Description:
- DIODE ZENER 3V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,738
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Product details
Overview
BZX58550-B3V0-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing precise 3.0 V nominal regulation at 50 µA test current, with ±2 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX58550-B3V0-Q datasheet, BZX58550-B3V0-Q pinout, BZX58550-B3V0-Q application, or BZX58550-B3V0-Q equivalent, this device serves as a compact, low-bias voltage reference in battery-powered sensor nodes, automotive body electronics, and portable power management circuits where space and leakage sensitivity are critical.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage under low-current bias conditions (IZ = 50 µA), with differential resistance ≤600 Ω at 5 mA and temperature coefficient of −3.5 mV/K - enabling predictable drift compensation in ambient-varying environments.
Its ultra-small SOD523 footprint (1.2 mm × 0.8 mm × 0.6 mm) and cathode-marked anode-cathode polarity support high-density PCB layouts, while AEC-Q101 qualification confirms robustness across −55 °C to +150 °C ambient operation and surge immunity up to 40 W (100 µs pulse).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V at IZ = 50 µA - defines regulation point for low-power bias networks |
| Tolerance | ±2 % - ensures tight voltage accuracy without external trimming |
| Max Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - sets thermal design margin for SMT layout |
| Forward Voltage | 0.9 V at IF = 10 mA - limits conduction loss during forward bias events |
| Reverse Leakage | 0.8 µA max at VR = 2.94 V - enables ultra-low standby current in always-on circuits |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - determines output impedance and load regulation error |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in under-hood automotive locations |
Pinout & Package
Package: SOD523 (SC-79), ultra-small surface-mount plastic package measuring 1.2 mm × 0.8 mm × 0.6 mm, with cathode identified by a marking bar on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration establishes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - minimizes quiescent current draw in battery-critical applications |
| AEC-Q101 qualification | Qualified for automotive use - guarantees reliability under thermal cycling, humidity, and mechanical stress per discrete semiconductor standard |
| Controlled leakage profile | B-series variant with intentional minor leakage rise - improves switching speed and reduces noise in dynamic regulation paths |
| Thermal resistance | 350 K/W (junction-to-ambient, 35 mm² Cu) - enables thermal-aware layout without heatsinking |
| Small outline package | SOD523 footprint - saves >60 % board area vs. SOD323, ideal for wearables and compact ECUs |
Applications
| Automotive Body Control Module | Portable Gas Sensor Interface |
|---|---|
Use Scenario: Voltage reference for microcontroller ADC inputs monitoring door lock status and interior lighting feedback signals. IC Role / Device Role / Timing Role: Zener regulator providing stable 3.0 V reference independent of battery voltage sag (9–16 V range). Use Value: Maintains <±0.5 % ADC accuracy over temperature and supply variation, eliminating need for active reference IC. |
Use Scenario: Biasing electrochemical gas sensor elements in handheld air quality monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-leakage voltage clamp establishing precise sensor excitation voltage at 3.0 V. Use Value: Enables 10-year battery life via 0.8 µA max reverse leakage and eliminates voltage-dependent sensor drift. |
| Industrial IoT Node Power Management | USB-C Peripheral Voltage Clamp |
Use Scenario: Regulation of 3.3 V LDO input in wireless sensor nodes deployed in factory-floor environments. IC Role / Device Role / Timing Role: Pre-regulator absorbing transient surges and stabilizing input to downstream LDO under brownout conditions. Use Value: Withstands 40 W non-repetitive surges and operates reliably at +105 °C ambient, reducing field failure rates. |
Use Scenario: Overvoltage protection clamping on USB-C VBUS line for accessory detection circuitry in docking stations. IC Role / Device Role / Timing Role: Fast-response Zener shunt limiting peak voltage to 3.0 V during hot-plug transients. Use Value: Differential resistance ≤600 Ω ensures rapid clamping within 100 ns, protecting 1.8 V logic interfaces. |
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-C3V0-Q | ±5 % tolerance, higher leakage (1.0 µA max), same 3.0 V nominal | Lower cost, less precision - suitable for non-critical biasing where calibration is performed digitally | Select when budget constraints outweigh voltage accuracy requirements and leakage budget allows +25 % increase |
| MMSZ5226B-7-F | 3.0 V ±5 %, SOD-123 package (2.7 mm × 1.4 mm), 500 mW Ptot | Larger footprint, higher power handling - used where thermal margin is prioritized over size | Choose when board space permits larger package and system requires higher surge energy absorption |
Compared with BZX58550-C3V0-Q, the BZX58550-B3V0-Q delivers tighter tolerance and lower leakage for precision analog sensing; versus MMSZ5226B-7-F, it trades 44 % smaller area and AEC-Q101 qualification for reduced power rating - making it optimal for space-constrained automotive and portable designs.
Availability
BZX58550-B3V0-Q is available at Aetrix Electronics and suitable for automotive body control modules, portable gas sensor interfaces, and industrial IoT node power management requiring stable component supply, long-lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for BZX58550-B3V0-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 essential semiconductors, with leadership in logic, discretes, and MOSFETs for automotive and industrial markets.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, designed specifically for low-current, space-constrained voltage regulation in automotive electronics and portable battery-powered systems.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX58550-B3V0-Q has a nominal Zener voltage of 3.0 V at 50 µA, with guaranteed breakdown occurring between 2.94 V (min) and 3.06 V (max) under specified test conditions. It is not rated for sustained operation above its specified VZ range; exceeding 3.06 V risks uncontrolled conduction and thermal runaway unless current is strictly limited by external series resistance.
Does this part require derating at elevated ambient temperatures?
Yes - total power dissipation must be linearly derated above Tamb = 25 °C. At 100 °C ambient, maximum allowable power drops to approximately 135 mW (based on 350 K/W Rth(j-a) and 150 °C Tj limit), requiring careful PCB copper area design and current limiting to avoid junction overheating.
Can this Zener diode be used in forward-biased mode as a regular rectifier?
No - while it conducts forward at ~0.9 V (IF = 10 mA), the BZX58550-B3V0-Q is optimized for reverse-bias Zener operation. Its forward characteristics are not characterized for continuous rectification, and its 200 mA absolute maximum forward current is not rated for repetitive duty cycle operation like dedicated signal diodes.
How does the "B" suffix differ from "C" in the BZX58550-Q series?
The "B" suffix denotes ±2 % voltage tolerance and lower leakage (0.8 µA max at VR = 2.94 V), whereas "C" indicates approximately ±5 % tolerance and higher leakage (1.0 µA max). Both share identical package, thermal specs, and AEC-Q101 qualification - the "B" grade is selected for precision analog references, "C" for cost-sensitive general-purpose regulation.
BZX58550-B3V0-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):
- 3 V
- Tolerance:
- ±2%
- Power - Max:
- 270 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-B3V0-QX FAQ
1.How can I place an order for BZX58550-B3V0-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B3V0-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-B3V0-QX reliable?
The price and inventory of BZX58550-B3V0-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-B3V0-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B3V0-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B3V0-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B3V0-QX?
BZX58550-B3V0-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B3V0-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-B3V0-QX?
For technical support, including BZX58550-B3V0-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B3V0-QX requirements.
6.How does Aetrix verify that BZX58550-B3V0-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B3V0-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-B3V0-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B3V0-QX?
All BZX58550-B3V0-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B3V0-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-B3V0-QX part is unused and in its original packaging.
Return procedure for BZX58550-B3V0-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B3V0-QX Tags
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MM5Z5V1ST1G
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