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Nexperia USA Inc. BZX58550-B2V2X
- Part No.:
- BZX58550-B2V2X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B2V2X.pdf
- Description:
- DIODE ZENER 2.2V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,757
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Product details
Overview
BZX58550-B2V2X 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 2.2 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω differential resistance at 5 mA, and forward voltage ≤0.9 V at 10 mA - optimized for battery-powered sensor nodes and portable IoT endpoints.
For engineers reviewing the BZX58550-B2V2X datasheet, BZX58550-B2V2X pinout, BZX58550-B2V2X application, or BZX58550-B2V2X equivalent, key selection criteria include its ultra-low test current specification, tight voltage tolerance, thermal resistance of 350 K/W on standard PCB layout, and cathode-anode polarity marking per IEC 60747-2.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.15–2.25 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and diode capacitance of 210 pF at 0 V. Its low leakage current (≤1.0 µA at 2.0 V reverse bias) supports stable operation in high-impedance analog monitoring paths.
The device uses silicon planar epitaxial construction and is characterized for junction temperatures up to 150 °C. Thermal resistance from junction to ambient is 350 K/W when mounted on an FR4 PCB with ~35 mm² copper area at the cathode tab - enabling reliable performance in space-constrained, thermally unmanaged layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.2 V at IZ = 50 µA - enables precise low-bias reference generation in microampere-level circuits |
| Voltage Tolerance | ±2 % - ensures predictable regulation across production batches without post-assembly trimming |
| Differential Resistance | 600 Ω at IZ = 5 mA - defines output impedance under small-signal AC load variations |
| Forward Voltage | ≤0.9 V at IF = 10 mA - minimizes conduction loss during forward-biased protection or clamping use |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets maximum steady-state power handling on standard FR4 layout |
| Reverse Leakage Current | ≤1.0 µA at VR = 2.0 V - critical for maintaining accuracy in high-source-impedance voltage divider references |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead profile, 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 - reverse-bias connection point for Zener operation |
| 2 | Anode (A) | Connected to circuit ground or lower-potential rail; completes reverse-bias path for voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces quiescent current draw in always-on battery-powered systems |
| Tight voltage tolerance | ±2 % series - eliminates need for external trimming in precision reference designs |
| Optimized leakage behavior | Controlled IR ≤1.0 µA at 2.0 V - maintains stability in high-impedance feedback networks |
| Ultra-compact footprint | SOD523 package (1.2 × 0.8 mm) - saves board area in wearables and miniaturized sensor modules |
Applications
| Portable Sensor Biasing | Low-Power MCU Reference |
|---|---|
Use Scenario: Providing stable 2.2 V reference to analog front-end of BLE temperature sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Zener voltage reference source for ADC input scaling and op-amp biasing. Use Value: Enables <1 µA standby current while maintaining ±0.5 % reference accuracy over −20 °C to +70 °C. |
Use Scenario: Supplying regulated voltage to internal bandgap reference input of ultra-low-power ARM Cortex-M0+ microcontroller. IC Role / Device Role / Timing Role: External precision shunt regulator for VREF+ pin, improving ADC linearity. Use Value: Reduces VREF drift from ±20 mV to ±2.2 mV across operating temperature range. |
| Wearable Health Monitor | Industrial IoT Node |
Use Scenario: Generating fixed bias for photodiode transimpedance amplifier in optical pulse oximeter. IC Role / Device Role / Timing Role: Low-noise DC reference establishing virtual ground and gain-setting node. Use Value: Limits reference-induced noise floor to <10 nV/√Hz, preserving signal integrity in sub-µA photocurrent detection. |
Use Scenario: Stabilizing supply to LoRaWAN sub-GHz RF transceiver's LNA bias network in remote environmental sensor. IC Role / Device Role / Timing Role: Shunt regulator for local 2.2 V rail feeding RF front-end biasing circuitry. Use Value: Maintains RF gain stability within ±0.3 dB despite 10–90 % battery discharge (2.0–3.3 V input). |
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 |
|---|---|---|---|
| BZX58550-C2V2 | Same 2.2 V nominal voltage but ±5 % tolerance and higher leakage (≤2.0 µA at 2.0 V) | Acceptable where cost sensitivity outweighs precision requirements | Select for non-critical biasing where 5 % variation is tolerable and leakage margin >1 µA exists |
| MMSZ5222B | 2.25 V nominal, ±5 % tolerance, 500 mW Ptot, SOD-123 package (2.7 × 1.6 mm) | Larger footprint and looser tolerance; higher power rating not needed in microampere designs | Choose only if existing layout accommodates larger SOD-123 or requires higher surge robustness |
Compared with BZX58550-C2V2, the BZX58550-B2V2X offers tighter voltage control and lower leakage for precision analog sensing; versus MMSZ5222B, it provides 55 % smaller footprint and 40 % lower typical leakage - critical for miniaturized, battery-limited systems.
Availability
BZX58550-B2V2X is available at Aetrix Electronics and suitable for portable sensor biasing, wearable health monitors, low-power MCU reference design, and industrial IoT node development requiring stable component supply across long-life production cycles.
Supply support for BZX58550-B2V2X 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX58550 series belongs to Nexperia's precision low-current Zener diode product line, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated and space-constrained electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX58550-B2V2X?
The BZX58550-B2V2X has a nominal Zener voltage of 2.2 V, with guaranteed breakdown occurring between 2.15 V and 2.25 V at IZ = 50 µA. It is not rated for sustained operation above 2.25 V in reverse bias - exceeding this risks parametric shift or thermal runaway under unregulated current conditions.
Can BZX58550-B2V2X be used in forward conduction mode?
Yes - its forward voltage is specified ≤0.9 V at 10 mA, making it suitable for low-drop clamping or ESD protection in forward-biased configurations. However, its primary design intent and characterization are for reverse-bias Zener regulation; forward characteristics are secondary and not optimized for switching or rectification.
How does thermal resistance affect regulation accuracy in compact PCB layouts?
With Rth(j-a) = 350 K/W on a 35 mm² cathode copper pad, a 100 µA Zener current (0.22 mW dissipation) raises junction temperature by only ~0.08 °C - negligible for accuracy. But at 1 mA (2.2 mW), ΔT ≈ 0.8 °C, shifting output by ~2.8 mV due to −3.5 mV/K coefficient - requiring thermal-aware layout for sub-mV stability.
Is BZX58550-B2V2X suitable for automotive applications?
No - this device is not AEC-Q200 qualified or automotive-grade screened. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products like BZX58550-B2V2X are unsuitable for safety-critical, life-support, or automotive systems where failure could result in injury or severe property damage.
BZX58550-B2V2X 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):
- 2.2 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 4 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-B2V2X FAQ
1.How can I place an order for BZX58550-B2V2X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B2V2X 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-B2V2X reliable?
The price and inventory of BZX58550-B2V2X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B2V2X is usually 5 days.
3.What payment methods are accepted for BZX58550-B2V2X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B2V2X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B2V2X?
BZX58550-B2V2X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B2V2X 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-B2V2X?
For technical support, including BZX58550-B2V2X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B2V2X requirements.
6.How does Aetrix verify that BZX58550-B2V2X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B2V2X 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-B2V2X meets industry standards.
7.What is the process for return or replacement of BZX58550-B2V2X?
All BZX58550-B2V2X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B2V2X, 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-B2V2X part is unused and in its original packaging.
Return procedure for BZX58550-B2V2X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B2V2X Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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