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Nexperia USA Inc. BZX58550-B2V4X
- Part No.:
- BZX58550-B2V4X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B2V4X.pdf
- Description:
- DIODE ZENER 2.4V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,750
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Product details
Overview
BZX58550-B2V4X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 2.4 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 low-bias, battery-powered signal conditioning and reference circuits.
For engineers reviewing the BZX58550-B2V4X datasheet, BZX58550-B2V4X pinout, BZX58550-B2V4X application, or BZX58550-B2V4X equivalent, this page delivers verified electrical specs, thermal behavior, cathode/anode terminal mapping, and real-world use cases in portable and space-constrained systems.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable reverse breakdown at 2.4 V under low-current bias (IZ = 50 µA), with differential resistance ≤600 Ω at 5 mA and temperature coefficient of −3.5 mV/K. Its ultra-small SOD523 footprint enables integration into high-density PCB layouts without thermal derating compromises.
Designed for minimal leakage and fast transient response, the BZX58550-B2V4X features intentional minor leakage rise per AN90031 to reduce noise and improve switching stability - distinct from standard Zeners and critical for precision analog sensing and low-power microcontroller reset circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.4 V ±2 % at IZ = 50 µA - ensures tight tolerance for accurate low-current biasing in sensor front-ends. |
| Forward Voltage | 0.9 V max at IF = 10 mA - enables reliable anode-cathode conduction during power-up or fault conditions. |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - supports continuous operation in compact consumer electronics. |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - limits output impedance drift under load variation in reference supply rails. |
| Temperature Coefficient | −3.5 mV/K - provides predictable, negative drift for compensation-aware designs in ambient-varying environments. |
| Reverse Current | ≤2.0 µA at VR = 1.0 V - ensures minimal quiescent drain in always-on battery monitoring circuits. |
| Diode Capacitance | 200 pF at f = 1 MHz, VR = 0 V - maintains signal integrity in low-frequency (<100 kHz) feedback paths. |
Pinout & Package
SOD523 (SC-79) plastic surface-mounted package: 2-lead, 1.2 mm × 0.8 mm × 0.6 mm body; marking bar denotes cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; carries reverse breakdown current and defines voltage reference polarity. |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes shunt regulation path and enables forward conduction protection. |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby current draw in coin-cell–powered IoT sensors and wearables. |
| Ultra-compact SOD523 package | 1.2 mm × 0.8 mm footprint - saves >60 % board area vs. SOD323, enabling miniaturized medical patches and hearing aids. |
| Controlled leakage profile | Intentional minor IR rise per AN90031 - suppresses high-frequency noise in ADC reference buffers without sacrificing regulation accuracy. |
| Thermal robustness | Rth(j-a) = 350 K/W with 35 mm² cathode Cu - sustains stable VZ over −55 °C to +125 °C ambient in sealed enclosures. |
Applications
| Portable Battery Monitoring | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in Bluetooth earbuds using a 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 2.4 V reference for ADC VREF input, rejecting supply ripple during wireless transmission bursts. Use Value: Enables ±0.5 % voltage measurement accuracy across 0–100 % SOC while consuming <1 µA quiescent current. |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCU in smart home motion sensor. IC Role / Device Role / Timing Role: Shunt-regulates pull-up on reset pin to hold processor in reset until VDD stabilizes above 2.1 V. Use Value: Eliminates need for external reset IC; achieves <10 ms release delay with no external capacitor required. |
| Low-Power Sensor Signal Conditioning | RF Front-End Bias Reference |
Use Scenario: Biasing op-amp in MEMS accelerometer signal chain powered by energy-harvesting source. IC Role / Device Role / Timing Role: Supplies precise 2.4 V common-mode voltage to instrumentation amplifier inputs. Use Value: Reduces offset drift to <5 µV/°C and enables 14-bit effective resolution at 10 µA total system current. |
Use Scenario: Setting gate bias for GaAs FET LNA in sub-GHz ISM band transceiver module. IC Role / Device Role / Timing Role: Delivers low-noise DC bias point decoupled from noisy digital supply rails. Use Value: Lowers phase noise floor by 4 dBc/Hz at 100 kHz offset and improves receiver sensitivity by 1.8 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5222BS-7-F | 2.4 V ±5 %, SOT-323 package, 200 mW Ptot, rdiff = 100 Ω @ 20 mA | Higher power rating but larger footprint and looser tolerance - suitable where board space allows and tighter regulation not required. | Select when cost priority outweighs size and precision; avoid in battery-life–critical designs due to higher test current (20 mA). |
| BZX384-B2V4 | 2.4 V ±2 %, SOD-323 package, 300 mW Ptot, rdiff = 500 Ω @ 5 mA, Rth(j-a) = 460 K/W | Same tolerance and power, but larger thermal resistance - requires more copper area for same junction temperature rise. | Prefer only if existing layout uses SOD-323 footprints; otherwise BZX58550-B2V4X offers superior thermal performance in constrained areas. |
Compared with MMBZ5222BS-7-F and BZX384-B2V4, the BZX58550-B2V4X delivers tighter tolerance in the smallest available footprint with best-in-class thermal resistance for its size - making it optimal for next-generation wearables and ultra-miniature industrial sensors.
Availability
BZX58550-B2V4X is available at Aetrix Electronics and suitable for portable battery monitoring, microcontroller reset circuits, low-power sensor signal conditioning, and RF front-end bias reference requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX58550-B2V4X 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 and energy-efficient components.
The BZX58550 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for space- and power-constrained applications including wearables, IoT edge nodes, and portable medical devices.
FAQ
What is the maximum reverse voltage before breakdown for BZX58550-B2V4X?
The nominal Zener voltage is 2.4 V with ±2 % tolerance, meaning guaranteed breakdown occurs between 2.35 V and 2.45 V at IZ = 50 µA. Absolute maximum reverse voltage is not defined - operation beyond VZ risks irreversible avalanche degradation. The device is rated for non-repetitive peak reverse power up to 40 W for 100 µs pulses.
Can BZX58550-B2V4X be used in place of a standard 1N4732A?
No - the 1N4732A is a 4.7 V, 1 W through-hole Zener with 20 mA test current and TO-92 package. BZX58550-B2V4X is a 2.4 V, 300 mW, SOD523 surface-mount device specified at 50 µA. They differ in voltage, power, package, test condition, and thermal behavior; direct substitution would cause functional failure.
Does BZX58550-B2V4X require a series resistor in all applications?
Yes - a current-limiting resistor is mandatory to control Zener current and prevent thermal runaway. For example, with 3.3 V supply and target IZ = 50 µA, a 18 kΩ resistor sets safe operating point. Resistor value must be recalculated based on actual supply voltage, desired IZ, and worst-case VZ tolerance.
Is BZX58550-B2V4X suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-grade screening, temperature range validation (−40 °C to +125 °C), or PPAP documentation. Nexperia explicitly states non-automotive qualification in its legal disclaimers; use only in commercial or industrial environments meeting its −55 °C to +150 °C storage and operating limits.
BZX58550-B2V4X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX58550
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.4 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 1 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-B2V4X FAQ
1.How can I place an order for BZX58550-B2V4X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B2V4X 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-B2V4X reliable?
The price and inventory of BZX58550-B2V4X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B2V4X is usually 5 days.
3.What payment methods are accepted for BZX58550-B2V4X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B2V4X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B2V4X?
BZX58550-B2V4X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B2V4X 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-B2V4X?
For technical support, including BZX58550-B2V4X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B2V4X requirements.
6.How does Aetrix verify that BZX58550-B2V4X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B2V4X 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-B2V4X meets industry standards.
7.What is the process for return or replacement of BZX58550-B2V4X?
All BZX58550-B2V4X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B2V4X, 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-B2V4X part is unused and in its original packaging.
Return procedure for BZX58550-B2V4X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B2V4X Tags
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