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Nexperia USA Inc. BZX58550-B8V2-QX
- Part No.:
- BZX58550-B8V2-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B8V2-QX.pdf
- Description:
- DIODE ZENER 8.2V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,827
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Product details
Overview
BZX58550-B8V2-QX from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 8.2 V nominal regulation at 50 µA test current with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and qualified to AEC-Q101 for automotive power rail stabilization.
For engineers reviewing the BZX58550-B8V2-QX datasheet, BZX58550-B8V2-QX pinout, BZX58550-B8V2-QX application, or BZX58550-B8V2-QX equivalent, this device supports low-bias voltage reference, ECU sensor biasing, and portable battery-powered voltage clamping where ultra-small footprint and low leakage are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 8.04 V to 8.36 V at IZ = 50 µA, exhibiting a temperature coefficient of +3.2 mV/K and diode capacitance of 150 pF at 0 V. Its low 50 µA test current enables stable regulation in micro-power circuits.
The device features intentional minor leakage current optimization per AN90031 for fast switching transients and noise reduction, and achieves thermal resistance of 350 K/W (junction-to-ambient, 35 mm² cathode copper area), supporting operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 8.2 V at IZ = 50 µA; defines precise regulation point for low-current bias networks |
| Voltage Tolerance | ±2 % (B-series); ensures tight output stability across production lots |
| Differential Resistance | 80 Ω at IZ = 5 mA; determines regulation stiffness under load variation |
| Forward Voltage | 0.9 V at IF = 10 mA; enables predictable forward conduction for dual-direction protection |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C with 35 mm² cathode Cu area; sets maximum continuous DC power handling |
| Junction Temperature Limit | 150 °C; defines absolute thermal ceiling for automotive under-hood reliability |
| AEC-Q101 Qualified | Yes; validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
Package: SOD523 (SC-79), ultra-small surface-mount plastic package measuring 1.2 mm × 0.8 mm × 0.6 mm with flat leads and cathode marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOD523 footprint | Enables placement in space-constrained automotive modules (e.g., door ECUs, seat controllers) without sacrificing thermal performance |
| Low 50 µA test current | Reduces quiescent current draw in battery-backed systems such as telematics sleep modes and keyless entry receivers |
| Optimized leakage profile (AN90031) | Minimizes transient overshoot during power-up/down in CAN/LIN bus termination networks |
| AEC-Q101 qualification | Validates reliability for 15-year automotive service life under thermal shock, humidity, and vibration stress |
| 150 pF capacitance at 0 V | Provides effective high-frequency noise suppression on 12 V supply rails without destabilizing LDO feedback loops |
Applications
| Automotive Sensor Biasing | Portable Device Voltage Clamping |
|---|---|
Use Scenario: Providing stable 8.2 V reference to analog front-end of pressure or temperature sensors in engine control units. IC Role / Device Role / Timing Role: Zener voltage regulator establishing precision bias voltage for sensor excitation and ADC reference scaling. Use Value: Maintains sensor linearity over −40 °C to +125 °C ambient with <±0.5 % drift due to tight ±2 % tolerance and +3.2 mV/K TC. |
Use Scenario: Clamping surge transients on USB-C VBUS lines in handheld medical monitors powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-leakage Zener clamp absorbing ESD events while minimizing standby current drain. Use Value: Limits VBUS to 8.36 V max during 8 kV contact discharge, drawing only 0.1 µA reverse current at 7 V to extend battery runtime. |
| Low-Power Microcontroller Reset Circuit | Industrial IoT Node Reference |
Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ MCUs in smart lighting nodes operating from 9 V alkaline stacks. IC Role / Device Role / Timing Role: Precision Zener defining brown-out detection level in discrete reset generator circuits. Use Value: Delivers 8.04–8.36 V window with 80 Ω dynamic impedance, ensuring reset assertion within 100 ns of supply dip below threshold. |
Use Scenario: Supplying stable 8.2 V reference to 16-bit SAR ADCs in wireless vibration sensors deployed in factory machinery. IC Role / Device Role / Timing Role: Low-noise voltage reference source for high-resolution analog signal conditioning. Use Value: 150 pF capacitance and optimized leakage suppress RF coupling from motor drives, reducing ADC code spread by 3 LSB RMS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C8V2-Q | ±5 % tolerance (vs. ±2 %), higher 0.1 µA IR at 7 V, same SOD523 package and 8.2 V nominal | Suitable for non-critical biasing where cost sensitivity outweighs precision requirements | Select when tighter voltage accuracy is unnecessary and BOM cost reduction is prioritized |
| MMSZ5231BT1G | 8.2 V ±5 %, 500 mW Ptot, SOD-123 package (2.7 mm × 1.6 mm), 100 Ω rdiff | Higher power handling but 3.4× larger footprint; not AEC-Q101 qualified | Choose only for non-automotive, higher-power applications where board space permits larger package |
Compared with BZX58550-C8V2-Q, the BZX58550-B8V2-QX delivers tighter regulation and lower leakage for precision automotive sensing; versus MMSZ5231BT1G, it offers AEC-Q101 compliance and 40 % smaller footprint at the cost of 30 % lower power rating.
Availability
BZX58550-B8V2-QX is available at Aetrix Electronics and suitable for automotive ECU design, portable medical instrumentation, industrial IoT sensor nodes, and battery-powered telemetry requiring stable component supply across extended temperature ranges and long lifecycle commitments.
Supply support for BZX58550-B8V2-QX 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.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, designed specifically for low-current, space-constrained automotive and portable electronics voltage reference and clamping functions.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-B8V2-QX at 85 °C ambient?
At 85 °C ambient, derated total power dissipation is 225 mW, calculated using the 350 K/W thermal resistance (junction-to-ambient with 35 mm² cathode copper) and 150 °C maximum junction temperature. This allows 8.2 V × 27.4 mA = 225 mW continuous operation without exceeding Tj limit.
How does the BZX58550-B8V2-QX differ from standard BZX58550-B8V2 in terms of automotive qualification?
The "-QX" suffix denotes full AEC-Q101 qualification per Rev. 4 datasheet, including HTGB, HTRB, and temperature cycling tests. Standard BZX58550-B8V2 lacks documented AEC-Q101 validation and is not recommended for automotive use per Nexperia's official product status guidance.
Can BZX58550-B8V2-QX be used in parallel for higher current capability?
No - Zener diodes exhibit manufacturing spread in VZ and rdiff; paralleling causes current hogging and thermal runaway. For >50 µA regulation, use a single device with appropriate series resistor or select a higher-power Zener like BZX84-C8V2.
What is the significance of the "intentional minor rise of leakage current" noted in the datasheet?
This controlled increase in reverse leakage (e.g., 0.1 µA at 7 V) reduces minority carrier storage time, enabling faster turn-off during transient suppression and lowering high-frequency noise generation in sensitive analog circuits per application note AN90031.
BZX58550-B8V2-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):
- 8.2 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.2 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-B8V2-QX FAQ
1.How can I place an order for BZX58550-B8V2-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B8V2-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-B8V2-QX reliable?
The price and inventory of BZX58550-B8V2-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-B8V2-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B8V2-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B8V2-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B8V2-QX?
BZX58550-B8V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B8V2-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-B8V2-QX?
For technical support, including BZX58550-B8V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B8V2-QX requirements.
6.How does Aetrix verify that BZX58550-B8V2-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B8V2-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-B8V2-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B8V2-QX?
All BZX58550-B8V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B8V2-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-B8V2-QX part is unused and in its original packaging.
Return procedure for BZX58550-B8V2-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B8V2-QX Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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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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