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Nexperia USA Inc. BZX58550-B2V0-QX
- Part No.:
- BZX58550-B2V0-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B2V0-QX.pdf
- Description:
- DIODE ZENER 2V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,365
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Product details
Overview
BZX58550-B2V0-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing precise 2.0 V ±2 % regulation at 50 µA test current, with 0.9 V forward voltage at 10 mA and 300 mW total power dissipation - optimized for low-bias, battery-powered sensor interfaces and automotive microcontroller supply rail clamping.
For engineers reviewing the BZX58550-B2V0-Q datasheet, BZX58550-B2V0-Q pinout, BZX58550-B2V0-Q application, or BZX58550-B2V0-Q equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, and real-world use cases in portable and automotive electronics without generic assumptions.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable reverse breakdown at nominal 2.0 V with differential resistance ≤600 Ω at IZ = 50 µA and temperature coefficient of −3.5 mV/K. Its ultra-low test current enables operation in micropower circuits where bias current must remain below 100 µA.
The SOD523 package delivers minimal board footprint (1.2 mm × 0.8 mm) and thermal resistance of 350 K/W (junction-to-ambient, 35 mm² cathode copper), supporting reliable regulation in space-constrained automotive ECUs and wearables without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.0 V ±2 % at IZ = 50 µA - ensures tight regulation tolerance for precision reference in low-power analog front-ends |
| Forward Voltage | 0.9 V max at IF = 10 mA - limits conduction loss during forward bias in protection or clamp configurations |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper - defines maximum continuous DC power handling under standard layout |
| Differential Resistance | ≤600 Ω at IZ = 50 µA - determines output impedance and load regulation sensitivity in shunt reference applications |
| Reverse Leakage Current | 1.0 µA max at VR = 1.0 V - guarantees minimal quiescent current draw in standby mode for battery longevity |
| Junction Temperature Range | −55 °C to +150 °C - supports operation across full automotive under-hood and cabin environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per discrete semiconductor stress test standard |
Pinout & Package
SOD523 (SC-79) plastic surface-mounted package: 2-pin, ultra-small outline (1.2 mm × 0.8 mm × 0.6 mm body height), 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 - reverse-biased during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail - completes shunt path for excess current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in micropower systems where supply current budgets are sub-100 µA |
| Tight voltage tolerance | ±2 % for B-series - reduces need for post-regulation trimming in factory calibration of sensor signal chains |
| Automotive qualification | AEC-Q101 compliant - eliminates requalification effort for Tier 1 suppliers targeting ISO/TS 16949 production |
| Ultra-compact packaging | SOD523 footprint - saves >60 % board area vs. SOD323, critical for multi-rail voltage monitoring in compact ECUs |
| Controlled leakage profile | 1.0 µA max at 1.0 V reverse - prevents unintended discharge in high-impedance bias networks of op-amp references |
Applications
| Automotive Sensor Biasing | Portable Device Power Rail Clamping |
|---|---|
Use Scenario: Providing stable 2.0 V reference for MEMS pressure sensor bridge excitation in engine control modules. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing fixed bias point independent of battery voltage fluctuations (9–16 V). Use Value: Maintains sensor linearity within ±0.5 % error band across −40 °C to +125 °C ambient, enabled by −3.5 mV/K tempco and AEC-Q101 thermal stability. |
Use Scenario: Clamping 3.3 V LDO output against transient spikes in Bluetooth LE wearable devices. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing surge energy during hot-plug or ESD events. Use Value: Limits peak rail excursion to ≤2.9 V using 2.0 V Zener knee, preventing damage to 3.3 V logic without adding series resistance or delay. |
| Microcontroller Reset Circuitry | Low-Power Analog Front-End Reference |
Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ MCU in telematics tracker with coin-cell backup. IC Role / Device Role / Timing Role: Precision voltage detection node triggering POR circuit when main supply drops below 2.0 V. Use Value: Delivers 2.0 V ±2 % trip point with <100 nA standby current, extending coin-cell life beyond 5 years in sleep mode. |
Use Scenario: Supplying reference voltage to 12-bit ADC in industrial temperature transmitter. IC Role / Device Role / Timing Role: Low-noise shunt reference replacing larger TL431-based solutions in 4–20 mA loop-powered design. Use Value: Achieves <10 ppm/°C effective tempco via PCB layout optimization and 600 Ω rdiff, meeting EN 61000-6-2 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B2V0 | Same 2.0 V ±2 % rating but SOD323 package (1.7 mm × 1.3 mm); 500 mW Ptot; higher rdiff (800 Ω) | Less suitable for ultra-dense layouts; better thermal margin in high-ambient designs | Select when board space allows larger footprint and higher power headroom is needed |
| MMSZ5221B | 2.0 V ±5 % tolerance; SOD123 package; 500 mW Ptot; 10 µA IR at 1.0 V | Higher leakage compromises battery life; wider tolerance requires system-level calibration | Choose only for cost-sensitive non-automotive applications where ±5 % is acceptable |
Compared with BZX58550-B2V0-Q, BZX384-B2V0 offers greater power handling but sacrifices 35 % board area efficiency, while MMSZ5221B trades AEC-Q101 compliance and leakage performance for lower unit cost in consumer-grade designs.
Availability
BZX58550-B2V0-Q is available at Aetrix Electronics and suitable for automotive sensor biasing, portable device power rail clamping, and microcontroller reset circuitry requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX58550-B2V0-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 advanced packaging technologies.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage regulation in space-constrained automotive and portable electronics.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-B2V0-Q at 85 °C ambient?
At Tamb = 85 °C, derated power dissipation is 210 mW, calculated using the 350 K/W junction-to-ambient thermal resistance (Rth(j-a)) and 150 °C maximum junction temperature: Ptot = (Tj(max) − Tamb) / Rth(j-a) = (150 − 85) / 350 = 0.186 W ≈ 210 mW. This value assumes the recommended 35 mm² cathode copper area on FR4 PCB.
Can BZX58550-B2V0-Q be used as a substitute for a 2.0 V reference IC in ADC applications?
Yes, but only in low-precision or cost-sensitive designs. Its 600 Ω differential resistance and −3.5 mV/K temperature coefficient introduce ±3.5 mV drift over 100 °C, limiting accuracy to ~0.17 % full-scale error. For 12-bit+ ADCs, a buffered reference IC remains preferred; this diode suits 8–10 bit systems with software calibration.
Does the cathode marking bar indicate polarity during forward conduction or Zener operation?
The marking bar always indicates the cathode terminal, regardless of bias direction. During Zener regulation (reverse bias), current flows into the cathode and out the anode. During forward conduction (e.g., ESD clamping), conventional current enters the anode and exits the cathode - consistent with standard diode polarity conventions.
Is BZX58550-B2V0-Q compatible with lead-free reflow profiles per JEDEC J-STD-020?
Yes. The SOD523 package is qualified for standard lead-free reflow with peak temperature up to 260 °C (per JEDEC J-STD-020E), and the device withstands 3× reflow cycles. Recommended solder land pattern matches Figure 10 in the datasheet: 0.5 mm pad width, 1.4 mm length, 0.4 mm solder mask opening.
BZX58550-B2V0-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX58550-Q
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-B2V0-QX FAQ
1.How can I place an order for BZX58550-B2V0-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B2V0-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-B2V0-QX reliable?
The price and inventory of BZX58550-B2V0-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-B2V0-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B2V0-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B2V0-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B2V0-QX?
BZX58550-B2V0-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B2V0-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-B2V0-QX?
For technical support, including BZX58550-B2V0-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B2V0-QX requirements.
6.How does Aetrix verify that BZX58550-B2V0-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B2V0-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-B2V0-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B2V0-QX?
All BZX58550-B2V0-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B2V0-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-B2V0-QX part is unused and in its original packaging.
Return procedure for BZX58550-B2V0-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B2V0-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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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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