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Nexperia USA Inc. BZX58550-B4V7-QX
- Part No.:
- BZX58550-B4V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B4V7-QX.pdf
- Description:
- DIODE ZENER 4.7V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,427
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Product details
Overview
BZX58550-B4V7-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 4.7 V ±2 % nominal regulation at 50 µA test current, with 300 mW total power dissipation and 0.9 V forward voltage at 10 mA - optimized for battery-powered sensor biasing, automotive microcontroller reference rails, and low-power analog signal conditioning.
For engineers reviewing the BZX58550-B4V7-Q datasheet, BZX58550-B4V7-Q pinout, BZX58550-B4V7-Q application, or BZX58550-B4V7-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 reference, maintaining stable reverse breakdown at 4.7 V with differential resistance ≤80 Ω at 5 mA and temperature coefficient of −2.7 mV/K. Its low 50 µA test current enables ultra-low quiescent current regulation in always-on circuits.
Designed for automotive environments, it meets AEC-Q101 stress requirements and features intentional minor leakage rise (per AN90031) to improve switching speed and reduce noise in feedback paths - distinct from standard Zeners with tighter IR control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.7 V ±2 % at IZ = 50 µA - ensures precise low-bias reference for 3.3 V/5 V rail monitoring |
| Differential Resistance | ≤80 Ω at IZ = 5 mA - minimizes output voltage shift under load variation in feedback networks |
| Temperature Coefficient | −2.7 mV/K - predictable negative drift enables compensation in temperature-sensitive analog stages |
| Forward Voltage | 0.9 V max at IF = 10 mA - supports bidirectional clamping or dual-purpose use in protection circuits |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - defines safe continuous operation in compact PCB layouts |
| Junction Temperature Limit | 150 °C - enables reliable operation in under-hood automotive modules and industrial edge sensors |
| Reverse Current | ≤3.0 µA at VR = 4.0 V - confirms sharp knee and low leakage near regulation threshold |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal - critical for correct polarity in shunt regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and infotainment applications per discrete semiconductor stress test standard |
| Low test current (50 µA) | Enables regulation in µA-level standby circuits without compromising battery life in portable ECUs |
| Optimized leakage profile | Intentional minor IR rise per AN90031 improves transient response and reduces high-frequency noise in feedback loops |
| Ultra-compact SOD523 footprint | Reduces board area by >50 % vs. SOD-123, supporting high-density layout in space-constrained ADAS sensors |
| Stable ±2 % tolerance | Eliminates need for post-assembly trimming in production, lowering calibration cost for reference voltage generation |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 4.7 V reference for LIN transceiver bias and microcontroller ADC reference in door module PCBs. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precision reference rail independent of main 12 V supply fluctuations. Use Value: Maintains <±10 mV reference stability across −40 °C to +125 °C ambient, meeting ISO 16750-2 pulse test requirements. |
Use Scenario: Biasing thermistor bridge amplifiers in smart pressure transmitters with 4–20 mA loop power constraints. IC Role / Device Role / Timing Role: Low-current Zener clamp setting excitation voltage for ratiometric measurement accuracy. Use Value: 50 µA operating point draws negligible current from loop-powered design while delivering ±0.1 % voltage accuracy. |
| Portable Medical Wearable Sensor | Automotive Cabin Air Quality Monitor |
Use Scenario: Regulating reference voltage for photodiode TIA in pulse oximeter front-end with coin-cell battery supply. IC Role / Device Role / Timing Role: Ultra-low-quiescent shunt regulator enabling 24/7 optical sensing without measurable battery drain. Use Value: 300 mW power rating allows brief surge handling during LED flash events while maintaining long-term 0.5 µA sleep current. |
Use Scenario: Stabilizing CO₂ sensor heater supply and NDIR detector reference in HVAC control unit. IC Role / Device Role / Timing Role: Precision Zener defining heater drive voltage setpoint and detector bias in multi-rail automotive subsystem. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifecycle with no derating required at 105 °C junction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C4V7-Q | Same 4.7 V nominal voltage but ±5 % tolerance and higher leakage (≤5 µA at 4.0 V) | Acceptable where cost sensitivity outweighs precision; not recommended for ADC references | Select when budget constraints dominate and ±5 % regulation error is acceptable in non-critical biasing |
| MMSZ4700T1G | 4.7 V ±5 %, SOD-123 package (2.7 mm × 1.4 mm), 500 mW Ptot, higher rdiff (100 Ω) | Larger footprint limits high-density designs; higher power rating suits higher-current loads | Choose only if board space permits larger package and system requires >300 mW dissipation margin |
Compared with BZX58550-C4V7-Q, the BZX58550-B4V7-Q delivers tighter tolerance and lower leakage for precision references; versus MMSZ4700T1G, it offers 45 % smaller footprint and better thermal performance on FR4, but with lower absolute power headroom.
Availability
BZX58550-B4V7-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, portable medical wearables, and cabin air quality monitors requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX58550-B4V7-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 components - including logic, discretes, MOSFETs, and ESD protection devices - serving automotive, industrial, and consumer markets.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage regulation in space- and power-constrained automotive and industrial systems.
FAQ
What is the maximum reverse current at 4.0 V for BZX58550-B4V7-Q?
The maximum reverse current is 3.0 µA at VR = 4.0 V and Tj = 25 °C, as specified in Table 8 of the datasheet. This low leakage ensures minimal error in precision reference applications and supports accurate ratiometric measurements in sensor interfaces.
Can BZX58550-B4V7-Q be used in place of a standard 1N4735A?
No - the BZX58550-B4V7-Q is a low-current (50 µA test) Zener in SOD523 package with 300 mW dissipation, whereas the 1N4735A is a 1 W, 6.2 V device in DO-41 package. They differ in voltage, power rating, test current, package, and thermal behavior; direct substitution is not electrically or mechanically viable.
Does this part support reflow soldering per JEDEC J-STD-020?
Yes - the SOD523 package is qualified for standard lead-free reflow profiles per JEDEC J-STD-020. Figure 10 provides the recommended solder land pattern, and the device withstands peak temperatures up to 260 °C for ≤30 seconds, consistent with IPC Class 3 assembly requirements.
Is the temperature coefficient linear across the full operating range?
The −2.7 mV/K value is specified at Tj = 25 °C and represents typical behavior near nominal conditions. Actual coefficient varies slightly with temperature and current; for high-accuracy designs, the full VZ vs. Tj curve in Figure 7 should be consulted to model deviation beyond ±10 °C from 25 °C.
BZX58550-B4V7-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):
- 4.7 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-B4V7-QX FAQ
1.How can I place an order for BZX58550-B4V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B4V7-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-B4V7-QX reliable?
The price and inventory of BZX58550-B4V7-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-B4V7-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B4V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B4V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B4V7-QX?
BZX58550-B4V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B4V7-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-B4V7-QX?
For technical support, including BZX58550-B4V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B4V7-QX requirements.
6.How does Aetrix verify that BZX58550-B4V7-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B4V7-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-B4V7-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B4V7-QX?
All BZX58550-B4V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B4V7-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-B4V7-QX part is unused and in its original packaging.
Return procedure for BZX58550-B4V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B4V7-QX Tags
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MM5Z5V1ST1G
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