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Nexperia USA Inc. BZX58550-B2V0X
- Part No.:
- BZX58550-B2V0X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B2V0X.pdf
- Description:
- DIODE ZENER 2V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,891
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Product details
Overview
BZX58550-B2V0X 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 2.0 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω differential resistance at 5 mA, and 0.9 V forward voltage at 10 mA - optimized for portable battery-powered sensor nodes and wearables.
For engineers reviewing the BZX58550-B2V0X datasheet, BZX58550-B2V0X pinout, BZX58550-B2V0X application, or BZX58550-B2V0X equivalent, key selection criteria include its 50 µA regulation point, ultra-small SOD523 footprint, cathode-marked polarity, and low leakage performance critical for energy-constrained analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable DC voltage under low-current conditions. Its specified regulation at IZ = 50 µA enables accurate referencing in micropower comparators and ADC bias networks where traditional 5 mA Zeners draw excessive current.
The device exhibits a negative temperature coefficient of −3.5 mV/K and 220 pF junction capacitance at 0 V, making it suitable for low-frequency stabilization rather than RF bypass. Its 300 mW total power dissipation is rated on FR4 PCB with 35 mm² copper area at the cathode tab.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.0 V at IZ = 50 µA - defines precise low-current reference point for micropower analog circuits |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-calibration in production |
| Differential Resistance | 600 Ω at IZ = 5 mA - limits regulation error under small load variations |
| Forward Voltage | 0.9 V at IF = 10 mA - supports use as low-drop rectifier or clamp in dual-role designs |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - sets thermal derating boundary for PCB layout |
| Junction Temperature Limit | 150 °C - constrains maximum ambient + self-heating in sealed enclosures |
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 - must be routed to higher-potential side in reverse-bias configuration |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms current path during Zener conduction - requires low-impedance return path for stability |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - enables direct use in nanoampere-biased op-amp references without external current boosting |
| Ultra-compact footprint | SOD523 package (1.2 × 0.8 mm) - saves >60 % board area vs. SOT23 Zeners, critical for hearing aids and implantable sensors |
| Controlled leakage profile | B-series variant with intentional minor leakage rise - improves switching transient response and reduces noise in feedback loops |
| Thermal robustness | Rth(j-a) = 350 K/W with 35 mm² cathode copper - allows 120 mW continuous dissipation at 70 °C ambient in typical layout |
Applications
| Portable Sensor Biasing | Wearable Device Reference |
|---|---|
Use Scenario: Providing stable 2.0 V reference for MEMS accelerometer signal conditioning in Bluetooth earbuds. IC Role / Device Role / Timing Role: Zener voltage reference for ADC input scaling and op-amp offset nulling. Use Value: Enables <1 µA quiescent current in bias network while maintaining ±10 mV reference accuracy across −20 to +60 °C. |
Use Scenario: Supplying precision bias to optical heart-rate monitor photodiode amplifier in smartwatch. IC Role / Device Role / Timing Role: Low-noise voltage reference for transimpedance amplifier feedback network. Use Value: Reduces reference drift-induced baseline wander by 40 % compared to resistor-divider bias under battery voltage sag. |
| IoT Node Power Monitoring | Medical Patch Voltage Clamp |
Use Scenario: Regulating voltage for fuel-gauge IC in LPWAN soil moisture sensor node powered by coin cell. IC Role / Device Role / Timing Role: Stable shunt regulator establishing known VREF for battery voltage ADC measurement. Use Value: Maintains ±0.5 % ADC full-scale accuracy over 10-year shelf life despite electrolyte aging in CR2032 cells. |
Use Scenario: Clamping electrode interface voltage in disposable ECG patch to prevent patient skin irritation. IC Role / Device Role / Timing Role: Bidirectional overvoltage protector limiting electrode swing to ±2.0 V relative to reference. Use Value: Limits peak current to <50 nA during ESD events while preserving sub-µV bio-signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-current Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics TSZ18020 | 2.0 V ±2 %, but specified at 200 µA test current; 350 Ω rdiff; SOD323 package (1.7 × 1.3 mm) | Higher test current increases standby power; larger footprint reduces density in space-constrained wearables | Select only if existing layout accommodates SOD323 and system can tolerate 4× higher reference current |
| Vishay BZX55C2V0 | 2.0 V ±5 %, specified at 5 mA; 100 Ω rdiff; DO-35 through-hole package (4.5 mm length) | Loose tolerance and high test current make it unsuitable for micropower designs; through-hole incompatible with automated SMT lines | Reject for new designs requiring low current or SMT assembly; acceptable only for legacy repair or prototyping |
Compared with BZX58550-B2V0X, TSZ18020 trades higher bias current for lower dynamic impedance, while BZX55C2V0 sacrifices accuracy and form factor for cost - neither matches the 50 µA/±2 %/SOD523 combination essential for next-gen ultra-low-power sensing.
Availability
BZX58550-B2V0X is available at Aetrix Electronics and suitable for portable sensor biasing, wearable device reference, and IoT node power monitoring requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-B2V0X 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 advanced packaging and automotive-qualified components.
The BZX58550 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for energy-constrained applications where regulation at microampere currents and minimal PCB real estate are mandatory design constraints.
FAQ
What is the maximum continuous reverse current the BZX58550-B2V0X can sustain without degradation?
The device supports up to 200 mA forward current per Absolute Maximum Ratings, but for Zener operation, sustained reverse current is limited by power dissipation. At 25 °C ambient with 35 mm² cathode copper, 300 mW rating permits ~150 mA at 2.0 V before exceeding thermal limits - however, regulation accuracy degrades above 5 mA due to rising differential resistance.
Can BZX58550-B2V0X be used in series to achieve higher reference voltages?
No - the BZX58550-B2V0X lacks matched temperature coefficients or tracking characteristics required for stable series stacking. Cascading introduces cumulative tolerance error (±4 % for two units) and unequal thermal coupling, causing >10 mV/°C drift. Use a single higher-voltage Zener like BZX58550-B10 instead.
How does the "B" suffix in BZX58550-B2V0X affect electrical behavior versus "C" variants?
The "B" suffix denotes ±2 % tolerance and intentional minor leakage current rise per AN90031, optimizing fast switching and noise reduction. "C" variants offer ±5 % tolerance and lower leakage - "B" is preferred for dynamic reference applications; "C" suits static bias where accuracy is secondary to leakage minimization.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes - Nexperia provides a validated reflow footprint (Fig. 10) supporting JEDEC J-STD-020-compliant lead-free profiles. Peak temperature must not exceed 260 °C, with time above 217 °C limited to 60–150 seconds. The 0.34 mm lead pitch and 0.17 mm thickness require stencil aperture reduction to 80 % for optimal paste release.
BZX58550-B2V0X 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 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7 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-B2V0X FAQ
1.How can I place an order for BZX58550-B2V0X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B2V0X 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-B2V0X reliable?
The price and inventory of BZX58550-B2V0X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B2V0X is usually 5 days.
3.What payment methods are accepted for BZX58550-B2V0X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B2V0X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B2V0X?
BZX58550-B2V0X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B2V0X 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-B2V0X?
For technical support, including BZX58550-B2V0X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B2V0X requirements.
6.How does Aetrix verify that BZX58550-B2V0X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B2V0X 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-B2V0X meets industry standards.
7.What is the process for return or replacement of BZX58550-B2V0X?
All BZX58550-B2V0X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B2V0X, 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-B2V0X part is unused and in its original packaging.
Return procedure for BZX58550-B2V0X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B2V0X Tags
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