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Nexperia USA Inc. BZX58550-C4V7-QX
- Part No.:
- BZX58550-C4V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C4V7-QX.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,943
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Product details
Overview
BZX58550-C4V7-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 4.7 V ±5 % nominal regulation at 50 µA test current, with 300 mW total power dissipation and 140 pF capacitance at 0 V - optimized for battery-powered sensor biasing, automotive microcontroller reference rails, and low-power analog signal conditioning.
For engineers reviewing the BZX58550-C4V7-Q datasheet, BZX58550-C4V7-Q pinout, BZX58550-C4V7-Q application, or BZX58550-C4V7-Q equivalent, this page delivers verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data, and automotive-grade leakage behavior per AN90031.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 4.47 V (min) to 4.94 V (max) at IZ = 50 µA, exhibiting a temperature coefficient of −2.7 mV/K and differential resistance of ≤80 Ω at IZ = 5 mA. Its ultra-small SOD523 footprint enables high-density PCB layouts while maintaining stable regulation under low-bias conditions.
Designed for AEC-Q101 compliance, it features intentional minor leakage current rise to reduce switching noise and improve transient response in automotive subsystems - validated across −55 °C to +150 °C ambient range and rated for 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.7 V ±5 % - defines precise DC reference level for low-power analog circuits |
| Test Current | 50 µA - enables stable regulation in ultra-low-power applications like coin-cell sensors |
| Max Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous operation on standard FR4 PCB with 35 mm² cathode copper area |
| Differential Resistance | ≤80 Ω at IZ = 5 mA - ensures minimal output voltage variation under load changes |
| Diode Capacitance | 140 pF at VR = 0 V, f = 1 MHz - limits high-frequency noise coupling in precision reference paths |
| Reverse Leakage | ≤3.0 µA at VR = 3.0 V - maintains low quiescent current in always-on automotive modules |
| Thermal Resistance | 350 K/W (junction-to-ambient) - determines temperature rise under sustained 50 µA bias in confined spaces |
Pinout & Package
Package: SOD523 (SC-79), plastic surface-mounted, 2-lead, 1.2 mm × 0.8 mm × 0.6 mm body; marking bar indicates cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker aligns with PCB silkscreen band |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and infotainment systems per stress test requirements |
| Low test current operation | Stable regulation at 50 µA enables use in energy-harvesting and battery-life-critical designs |
| Optimized leakage profile | Intentional minor IR rise improves switching speed and reduces broadband noise per AN90031 |
| Ultra-compact SOD523 | 0.96 mm² footprint saves board space in multi-rail PMIC monitoring and ECU sensor interfaces |
| Wide operating temperature | Functional from −55 °C to +150 °C ambient - suitable for engine control and ADAS modules |
Applications
| Automotive Microcontroller Reference | Portable Gas Sensor Biasing |
|---|---|
Use Scenario: Providing stable 4.7 V reference for ADC input scaling in automotive body control modules. IC Role / Device Role / Timing Role: Zener voltage regulator supplying precision reference to 12-bit SAR ADC. Use Value: Maintains <±1% reference accuracy over temperature and lifetime, meeting ISO 16750-4 requirements. |
Use Scenario: Biasing electrochemical gas sensing elements powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator establishing fixed bias voltage for sensor electrodes. Use Value: Draws only 50 µA quiescent current, extending battery life beyond 5 years in maintenance-free deployments. |
| Industrial IoT Node Power Monitoring | USB-C PD Auxiliary Voltage Clamp |
Use Scenario: Clamping auxiliary supply rail in battery-backed industrial telemetry nodes during brownout events. IC Role / Device Role / Timing Role: Overvoltage protection element limiting rail excursion to 4.94 V maximum. Use Value: Fast response (<100 ns) and low capacitance (140 pF) prevent false triggering of supervisor ICs. |
Use Scenario: Stabilizing VCONN auxiliary power rail in USB-C receptacles during hot-plug transitions. IC Role / Device Role / Timing Role: Shunt regulator maintaining tight 4.7 V tolerance despite dynamic load transients. Use Value: Differential resistance ≤80 Ω ensures <50 mV droop under 1 mA load steps, satisfying USB-IF spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B4V7-Q | ±2 % tolerance (vs. ±5 %); tighter VZ spread but higher cost and reduced availability | Preferred where reference stability <±0.1 V is required across temperature in calibration-critical instruments | Select when absolute voltage accuracy outweighs cost sensitivity and supply chain flexibility |
| MMSZ4705T1G | Same 4.7 V nominal, ±5 %, but SOD-123 package (2.7 × 1.6 mm) - 3× larger footprint and 550 mW Ptot | Suitable for non-space-constrained industrial controls needing higher surge robustness (40 W peak) | Choose when board real estate permits and higher pulse power handling is mandatory |
Compared with BZX58550-B4V7-Q, this C-series part trades tighter tolerance for broader supply availability and lower unit cost; versus MMSZ4705T1G, it delivers identical regulation performance in 60 % less PCB area but with reduced thermal margin under sustained load.
Availability
BZX58550-C4V7-Q is available at Aetrix Electronics and suitable for automotive electronics, portable sensor systems, and industrial IoT nodes requiring stable component supply with AEC-Q101 traceability and long-term lifecycle support.
Supply support for BZX58550-C4V7-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, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for low-power, space-constrained automotive and portable electronics where stable voltage references must operate reliably across extreme temperatures.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX58550-C4V7-Q has a nominal Zener voltage of 4.7 V with guaranteed minimum and maximum values of 4.47 V and 4.94 V respectively at 50 µA test current. It is not rated for forward conduction or avalanche beyond its specified reverse breakdown region - operation above 4.94 V under uncontrolled current will exceed safe power limits.
Does this device require a series resistor in typical Zener shunt configurations?
Yes - a current-limiting resistor is mandatory to restrict Zener current within safe operating limits. For example, with a 5.5 V supply and target 50 µA Zener current, a 14 kΩ resistor sets appropriate bias; exceeding 200 mA forward current or 300 mW total dissipation risks permanent damage per Absolute Maximum Ratings.
How does the "C" suffix differ from "B" in the BZX58550-Q series?
The "C" suffix denotes ±5 % tolerance on nominal Zener voltage, whereas "B" indicates ±2 %. Both share identical SOD523 packaging, thermal characteristics, and AEC-Q101 qualification - the distinction is solely in initial voltage binning accuracy and associated cost/availability trade-offs.
Can this diode be used in AC signal clipping applications?
No - the BZX58550-C4V7-Q is optimized for DC voltage regulation at low currents (50 µA to 5 mA). Its 140 pF capacitance and non-symmetrical IV curve make it unsuitable for bidirectional AC clamping; dedicated low-capacitance TVS diodes or dual-Zener configurations are required for such functions.
BZX58550-C4V7-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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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-C4V7-QX FAQ
1.How can I place an order for BZX58550-C4V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C4V7-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-C4V7-QX reliable?
The price and inventory of BZX58550-C4V7-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-C4V7-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C4V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C4V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C4V7-QX?
BZX58550-C4V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C4V7-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-C4V7-QX?
For technical support, including BZX58550-C4V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C4V7-QX requirements.
6.How does Aetrix verify that BZX58550-C4V7-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C4V7-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-C4V7-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C4V7-QX?
All BZX58550-C4V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C4V7-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-C4V7-QX part is unused and in its original packaging.
Return procedure for BZX58550-C4V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C4V7-QX Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MMSZ4682T1G
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MM5Z5V1ST1G
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