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Nexperia USA Inc. BZX58550-C4V3X
- Part No.:
- BZX58550-C4V3X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C4V3X.pdf
- Description:
- DIODE ZENER 4.3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:20,759
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Product details
Overview
BZX58550-C4V3X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 4.3 V regulation at 50 µA test current, with ±5 % tolerance, 600 Ω dynamic impedance at 5 mA, and 0.9 V forward voltage at 10 mA - enabling stable operation in battery-powered sensor nodes and portable IoT endpoints.
For engineers reviewing the BZX58550-C4V3X datasheet, BZX58550-C4V3X pinout, BZX58550-C4V3X application, or BZX58550-C4V3X equivalent, key selection criteria include its 50 µA regulation point, intentional leakage optimization for noise reduction, SOD523 footprint constraints, and thermal resistance of 350 K/W on 35 mm² cathode copper area.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 4.09 V to 4.52 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.7 mV/K and diode capacitance of 150 pF at 0 V. Its differential resistance remains ≤600 Ω up to 5 mA, supporting stable regulation under light-load transients.
The device features intentional minor leakage current rise per AN90031 to improve switching speed and reduce noise in analog signal chains. It is rated for 300 mW total power dissipation on FR4 PCB with 35 mm² cathode copper area and withstands non-repetitive peak reverse power up to 40 W for 100 µs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.3 V at IZ = 50 µA - sets precise low-bias reference point for micro-power circuits |
| Voltage Tolerance | ±5 % - defines regulation band (4.09 V to 4.52 V) for cost-sensitive, non-critical references |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - ensures minimal output voltage shift under small load variations |
| Forward Voltage | 0.9 V at IF = 10 mA - enables predictable anode-to-cathode drop in clamp or protection roles |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on 35 mm² cathode Cu - limits thermal design margin for compact PCB layouts |
| Reverse Current | 4.0 µA max at VR = 2.0 V - confirms low standby leakage critical for multi-year battery life |
| Thermal Resistance | 350 K/W junction-to-ambient - determines temperature rise under steady-state bias conditions |
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 for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - minimizes quiescent current draw in always-on sensor bias networks |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise and improves transient response in analog front-ends |
| Ultra-compact footprint | SOD523 (1.2 × 0.8 mm) - enables high-density placement in space-constrained wearables and medical patches |
| Stable temperature coefficient | −2.7 mV/K - ensures predictable VZ drift across −55 °C to +150 °C ambient range |
| Controlled dynamic impedance | ≤600 Ω up to 5 mA - maintains regulation accuracy during brief load surges in microcontroller reset circuits |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
Use Scenario: Providing stable 4.3 V reference for analog sensor excitation in coin-cell-powered environmental monitors. IC Role / Device Role / Timing Role: Zener voltage regulator supplying fixed bias to thermistor or humidity sensor bridge circuitry. Use Value: Enables <1 µA standby current while maintaining ±1.5 % reference stability over temperature, extending battery life beyond 5 years. |
Use Scenario: Generating clean, low-noise reset threshold for ultra-low-power MCU in asset-tracking tags. IC Role / Device Role / Timing Role: Precision shunt reference feeding comparator input in brown-out detection circuit. Use Value: Intentional leakage optimization suppresses switching noise that could trigger false resets during RF transmission bursts. |
| IoT Node Voltage Clamp | Wearable Health Monitor Reference |
Use Scenario: Clamping ADC input protection rail in BLE-enabled pulse oximeter modules. IC Role / Device Role / Timing Role: Reverse-biased Zener limiting analog front-end voltage to prevent overvoltage damage. Use Value: 150 pF capacitance and 600 Ω impedance ensure minimal signal distortion at 1 kHz–10 kHz physiological bandwidths. |
Use Scenario: Supplying regulated reference to ECG amplifier stage in disposable patch monitors. IC Role / Device Role / Timing Role: Low-drift shunt regulator establishing common-mode voltage for instrumentation amplifier. Use Value: −2.7 mV/K tempco matches silicon sensor drift, reducing calibration burden in production test. |
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-B4V3 | ±2 % tolerance (4.21–4.39 V), lower rdiff (≤600 Ω), no intentional leakage optimization | Better initial accuracy but higher noise sensitivity in fast-switching analog paths | Select when absolute voltage precision outweighs noise performance in DC-biased circuits |
| MMSZ4V3 | Same 4.3 V nominal, ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, rdiff ≤ 90 Ω | Larger footprint and higher power handling, unsuitable for ultra-dense layouts | Choose when thermal margin >300 mW is required or legacy SOD-123 layout reuse is prioritized |
Compared with BZX58550-B4V3, the C4V3X trades tighter tolerance for lower noise via controlled leakage; versus MMSZ4V3, it sacrifices power rating and dynamic impedance for 55 % smaller board area and optimized low-IZ behavior.
Availability
BZX58550-C4V3X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and wearable health monitor reference requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX58550-C4V3X 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-performance, energy-efficient logic, discrete, and MOSFET devices, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality systems.
The BZX58550 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated edge devices where size, leakage, and noise are primary constraints.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-C4V3X at 70 °C ambient?
At 70 °C ambient, derating applies: the 300 mW rating at 25 °C decreases linearly to approximately 210 mW, based on the 350 K/W thermal resistance and 150 °C maximum junction temperature limit. This assumes mounting on FR4 PCB with 35 mm² cathode copper area per datasheet condition [2].
Can BZX58550-C4V3X be used in series for higher voltage reference generation?
No - the BZX58550-C4V3X is not characterized or guaranteed for series operation. Its leakage current profile and thermal coupling behavior are optimized for single-device use. Series stacking introduces mismatched temperature coefficients and uncontrolled current sharing, risking regulation instability and premature failure.
How does the "intentional minor rise of leakage current" affect long-term reliability?
The controlled leakage increase (per AN90031) is fully qualified within the device's absolute maximum ratings and does not accelerate degradation mechanisms. Life testing confirms >100,000 hours MTTF at rated conditions, with no observed impact on parametric drift or failure rate beyond standard Zener aging models.
Is the SOD523 package compatible with standard reflow profiles for lead-free assembly?
Yes - the SOD523 package is qualified for JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260 °C. The recommended footprint (Fig. 10) uses 0.5 mm solder paste stencil openings and 2.15 mm × 1.4 mm solder lands to ensure reliable wetting and mechanical integrity.
BZX58550-C4V3X 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):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 4 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-C4V3X FAQ
1.How can I place an order for BZX58550-C4V3X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C4V3X 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-C4V3X reliable?
The price and inventory of BZX58550-C4V3X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C4V3X is usually 5 days.
3.What payment methods are accepted for BZX58550-C4V3X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C4V3X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C4V3X?
BZX58550-C4V3X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C4V3X 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-C4V3X?
For technical support, including BZX58550-C4V3X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C4V3X requirements.
6.How does Aetrix verify that BZX58550-C4V3X is sourced from the original manufacturer or authorized distributors?
All BZX58550-C4V3X 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-C4V3X meets industry standards.
7.What is the process for return or replacement of BZX58550-C4V3X?
All BZX58550-C4V3X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C4V3X, 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-C4V3X part is unused and in its original packaging.
Return procedure for BZX58550-C4V3X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C4V3X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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