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Nexperia USA Inc. BZX58550-B2V2-QX
- Part No.:
- BZX58550-B2V2-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B2V2-QX.pdf
- Description:
- DIODE ZENER 2.2V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,527
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Product details
Overview
BZX58550-B2V2-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing precise 2.2 V nominal regulation at 50 µA test current, with ±2 % tolerance, 600 Ω max differential resistance, and 4 µA max reverse leakage at 1.0 V. It delivers stable biasing for low-power sensor interfaces and portable battery-powered microcontroller reset circuits.
For engineers reviewing the BZX58550-B2V2-Q datasheet, BZX58550-B2V2-Q pinout, BZX58550-B2V2-Q application, or BZX58550-B2V2-Q equivalent, this page provides verified electrical specs, automotive-qualified thermal performance, AEC-Q101 compliance status, and validated SOD523 footprint data - all critical for space-constrained, low-bias analog design.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage across its cathode-anode terminals under reverse-bias conditions. Its regulation is specified at IZ = 50 µA, enabling ultra-low quiescent current operation ideal for energy-sensitive systems.
The BZX58550-B2V2-Q belongs to the "B" tolerance series (±2 %), exhibits a negative temperature coefficient of −3.5 mV/K, and features intentional low-leakage behavior-distinct from the "C" series optimized for fast switching. It is qualified per AEC-Q101 for automotive ambient temperature range (−55 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.2 V at IZ = 50 µA - defines precise reference point for low-current bias networks |
| Voltage Tolerance | ±2 % - ensures tight regulation window (2.15 V to 2.25 V) without post-production trimming |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - limits output impedance drift under load variation |
| Reverse Leakage Current | ≤4 µA at VR = 1.0 V - enables <1 µA standby current in battery-backed circuits |
| Forward Voltage | ≤0.9 V at IF = 10 mA - supports reliable anode-cathode conduction during power-up sequencing |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper - sets thermal derating baseline for PCB layout |
| Junction Temperature Limit | 150 °C - defines maximum operating junction temperature for reliability in under-hood automotive use |
Pinout & Package
SOD523 (SC-79) surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, ultra-small footprint with flat leads and cathode marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to regulated voltage node; marking bar identifies polarity for automated optical inspection and placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms shunt path for excess current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low test current specification | Regulation defined at 50 µA - enables direct integration into µA-level bias chains without loading error |
| AEC-Q101 qualification | Stress-tested for automotive discrete reliability - supports under-hood, infotainment, and ADAS subsystems |
| Thermal resistance optimization | Rth(j-a) = 350 K/W with 35 mm² cathode copper - allows >200 mW dissipation in compact layouts |
| Tight voltage tolerance | ±2 % (B-series) - eliminates need for external trimming in precision reference applications |
| Low forward voltage | ≤0.9 V at 10 mA - ensures predictable turn-on during power-rail ramp-up and brown-out recovery |
Applications
| Automotive Cabin Sensors | Portable Medical Wearables |
|---|---|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Shunt regulator establishing stable 2.2 V bias for sensor signal conditioning amplifiers. Use Value: ±2 % tolerance and −3.5 mV/K TC ensure <±10 mV drift over −40 °C to +85 °C, meeting ASIL-B calibration stability requirements. |
Use Scenario: Low-quiescent reference for ECG front-end ADC in battery-powered patch monitors. IC Role / Device Role / Timing Role: Precision voltage clamp supplying clean 2.2 V to op-amp rails and reference buffers. Use Value: 4 µA leakage at 1.0 V enables >7-day battery life on coin-cell power while maintaining 12-bit measurement accuracy. |
| Industrial IoT Edge Nodes | Consumer Audio DAC Biasing |
Use Scenario: Regulation for LoRaWAN transceiver supply rails in remote environmental gateways. IC Role / Device Role / Timing Role: Low-power Zener stabilizing 2.2 V LDO input to reduce dropout sensitivity and improve PSRR. Use Value: 300 mW power rating and SOD523 footprint allow integration into 12 mm² PCB area budgets without thermal vias. |
Use Scenario: Reference voltage source for headphone amplifier bias networks in wireless earbuds. IC Role / Device Role / Timing Role: Cathode-connected shunt regulator setting DC offset for Class-AB output stage. Use Value: 600 Ω dynamic impedance minimizes audible noise coupling from digital switching transients into analog audio paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C2V2-Q | ±5 % tolerance, 1 µA max IR at 1.0 V, same VZ nominal | Higher leakage tolerance; suited for non-critical bias where cost > precision | Select when ±5 % regulation suffices and lowest possible leakage is prioritized over tight voltage matching |
| MMSZ5222BT1G | 2.25 V nominal, ±5 %, 500 mW Ptot, SOD-123 package (2.7 × 1.6 mm) | Larger footprint, higher power, wider tolerance - less suitable for ultra-compact designs | Choose only if board space permits larger package and 500 mW dissipation is required for transient surge handling |
Compared with BZX58550-C2V2-Q, the BZX58550-B2V2-Q trades slightly higher leakage for ±2 % accuracy critical in sensor references; versus MMSZ5222BT1G, it sacrifices 200 mW headroom to achieve 55 % smaller PCB area and tighter thermal resistance control.
Availability
BZX58550-B2V2-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical wearables, industrial IoT edge nodes, and consumer audio DAC biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX58550-B2V2-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 logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components and advanced packaging.
The BZX58550-Q series belongs to Nexperia's automotive-grade Zener regulator portfolio, designed specifically for low-current, space-constrained bias and reference functions in harsh-environment electronics.
FAQ
What is the maximum continuous reverse current the BZX58550-B2V2-Q can handle without degradation?
The device is rated for up to 200 mA forward current, but as a Zener regulator, its reverse (Zener) current must stay within safe operating limits. At 25 °C ambient with 35 mm² cathode copper, the maximum continuous Zener current is 136 µA - derived from Ptot = 300 mW and VZ = 2.2 V. Exceeding this risks thermal runaway and parametric shift.
Does the BZX58550-B2V2-Q require a series resistor in all applications?
Yes - a current-limiting resistor is mandatory to set the Zener operating point and prevent thermal overstress. For example, with a 3.3 V supply and target IZ = 50 µA, a 22 kΩ resistor establishes nominal regulation while limiting worst-case power dissipation to 242 µW - well within the 300 mW rating.
How does the −3.5 mV/K temperature coefficient impact circuit accuracy over temperature?
Over a −40 °C to +125 °C range (165 K delta), the coefficient causes a total VZ shift of −578 mV - but since nominal VZ is 2.2 V, that represents a −26 % deviation. In practice, the actual shift is bounded by the ±2 % initial tolerance and measured TC linearity; typical deviation remains within ±15 mV across automotive grade range.
Can the BZX58550-B2V2-Q be used in parallel for higher power handling?
No - Zener diodes exhibit negative resistance characteristics and cannot be reliably paralleled due to mismatched breakdown voltages. Even minor VZ differences cause current hogging, leading to thermal instability and premature failure. Use a single device sized for the full load, or select a higher-power alternative like BZX84-C2V2.
BZX58550-B2V2-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):
- 2.2 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-B2V2-QX FAQ
1.How can I place an order for BZX58550-B2V2-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B2V2-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-B2V2-QX reliable?
The price and inventory of BZX58550-B2V2-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-B2V2-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B2V2-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B2V2-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B2V2-QX?
BZX58550-B2V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B2V2-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-B2V2-QX?
For technical support, including BZX58550-B2V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B2V2-QX requirements.
6.How does Aetrix verify that BZX58550-B2V2-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B2V2-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-B2V2-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B2V2-QX?
All BZX58550-B2V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B2V2-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-B2V2-QX part is unused and in its original packaging.
Return procedure for BZX58550-B2V2-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B2V2-QX Tags
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