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Nexperia USA Inc. BZX58550-B9V1-QX
- Part No.:
- BZX58550-B9V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B9V1-QX.pdf
- Description:
- DIODE ZENER 9.1V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,316
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Product details
Overview
BZX58550-B9V1-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in space-constrained, low-power circuits. It delivers a nominal 9.1 V regulation at 50 µA test current, with ±2 % tolerance, 100 Ω differential resistance at 5 mA, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX58550-B9V1-Q datasheet, BZX58550-B9V1-Q pinout, BZX58550-B9V1-Q application, or BZX58550-B9V1-Q equivalent, key selection criteria include low-test-current operation (50 µA), ultra-small SOD523 footprint, automotive-grade reliability, and tight 9.1 V ±2 % tolerance under minimal bias conditions.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output by conducting reverse current above its specified Zener voltage (9.1 V). Its low 50 µA test current enables use in battery-powered sensor nodes and standby power rails where leakage must be minimized.
The BZX58550-B9V1-Q exhibits a positive temperature coefficient of +3.8 mV/K and 150 pF junction capacitance at 0 V, making it suitable for low-frequency reference and noise-sensitive analog front-ends-not RF or high-speed switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal at IZ = 50 µA; ensures accurate low-bias reference in micro-power systems |
| Tolerance | ±2 %; supports tight regulation without post-calibration in automotive sensor interfaces |
| Differential Resistance (rdiff) | 100 Ω max at IZ = 5 mA; limits output voltage drift under varying load current |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; enables predictable forward conduction during polarity-reversal protection |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper; defines thermal derating envelope for PCB layout |
| Junction Temperature (Tj) | 150 °C max; allows operation in under-hood automotive environments with proper board thermal design |
| AEC-Q101 Qualified | Yes; certified for automotive discrete semiconductor stress testing per AEC standard |
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 voltage node; marked by physical bar on package body |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA-enables stable regulation in µA-level bias networks for IoT sensors and sleep-mode circuits |
| Tight voltage tolerance | ±2 % tolerance ensures <±182 mV deviation at 9.1 V-critical for ADC reference stability in automotive ECUs |
| Automotive qualification | AEC-Q101 qualified-validates reliability for engine control, body electronics, and ADAS subsystems |
| Ultra-compact SMD package | SOD523 footprint (1.2 × 0.8 mm) saves >60 % board area vs. SOD323-ideal for multi-rail PMIC monitoring points |
| Controlled leakage behavior | Intentional minor leakage rise optimized for fast switching transients and reduced noise in feedback loops |
Applications
| Automotive Cabin Sensor Biasing | Portable Medical Device Reference |
|---|---|
Use Scenario: Providing stable 9.1 V bias to MEMS pressure sensor signal conditioning circuitry inside vehicle cabin modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise input common-mode level for op-amp front-end. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure long-term accuracy and functional safety compliance over temperature and lifetime. |
Use Scenario: Supplying regulated reference voltage to low-power ECG analog front-end in wearable cardiac monitors. IC Role / Device Role / Timing Role: Low-current Zener reference enabling <1 µA quiescent current in battery-operated diagnostic mode. Use Value: 50 µA test current and 300 mW dissipation allow direct integration into coin-cell-powered designs without heat sinking. |
| Industrial PLC Input Protection | Smart Meter Voltage Monitoring |
Use Scenario: Clamping and regulating auxiliary supply rail for isolated digital input circuitry in programmable logic controllers. IC Role / Device Role / Timing Role: Overvoltage limiter and precision reference for optocoupler biasing and threshold detection. Use Value: 100 Ω rdiff and 150 °C Tj rating support robust operation in industrial ambient extremes (−40 °C to +85 °C). |
Use Scenario: Generating stable 9.1 V reference for metrology-grade ADC in residential smart electricity meters. IC Role / Device Role / Timing Role: Primary voltage reference source for energy measurement accuracy calibration. Use Value: Tight ±2 % tolerance and low temperature coefficient (+3.8 mV/K) minimize measurement drift across operating temperature range. |
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-C9V1-Q | ±5 % tolerance (vs. ±2 %); higher typical leakage at VR = 7.3 V | Acceptable where cost sensitivity outweighs precision requirements | Select when tighter tolerance is unnecessary and BOM cost reduction is prioritized |
| MMSZ5240B-TP | Same 9.1 V nominal but ±5 % tolerance; SOD-123 package (2.7 × 1.4 mm) | Requires larger PCB area; not AEC-Q101 qualified | Use only in non-automotive, non-safety-critical consumer applications with relaxed size constraints |
Compared with BZX58550-C9V1-Q and MMSZ5240B-TP, the BZX58550-B9V1-Q uniquely combines AEC-Q101 qualification, ±2 % tolerance, and ultra-compact SOD523 packaging-making it the sole choice for space-limited automotive voltage references requiring high initial accuracy and long-term stability.
Availability
BZX58550-B9V1-Q is available at Aetrix Electronics and suitable for automotive cabin electronics, portable medical instrumentation, industrial PLC input stages, and smart meter metrology circuits requiring stable component supply with guaranteed automotive-grade traceability.
Supply support for BZX58550-B9V1-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 essential semiconductors-including discrete devices, logic ICs, and MOSFETs-with manufacturing rooted in process efficiency and automotive-grade quality systems.
The BZX58550-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for low-current, high-precision voltage reference and regulation in harsh-environment electronic control units.
FAQ
What is the maximum reverse current (IR) at VR = 7.3 V for BZX58550-B9V1-Q?
At VR = 7.3 V and Tj = 25 °C, the maximum reverse current is 0.1 µA. This ultra-low leakage supports stable operation in high-impedance bias networks and extends battery life in always-on sensor applications.
Can BZX58550-B9V1-Q be used in place of a 9.1 V Zener in a linear regulator feedback loop?
Yes-it is explicitly characterized for low-current regulation and provides stable 9.1 V reference at 50 µA, making it suitable for feedback divider biasing in low-power LDOs where reference current draw must remain below 100 µA.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes-the device is qualified for lead-free reflow per J-STD-020, with peak temperature up to 260 °C. The recommended footprint matches Nexperia's SOD523 land pattern (1.4 mm × 0.5 mm pads, 0.6 mm spacing) shown in Figure 10 of the datasheet.
How does the +3.8 mV/K temperature coefficient affect accuracy over −40 °C to +125 °C?
Over that range, the total Zener voltage shift is approximately ±0.63 V (±6.9 % of 9.1 V). For applications requiring better thermal stability, this device should be used within narrower ambient ranges or paired with compensation circuitry.
BZX58550-B9V1-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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.9 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-B9V1-QX FAQ
1.How can I place an order for BZX58550-B9V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B9V1-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-B9V1-QX reliable?
The price and inventory of BZX58550-B9V1-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-B9V1-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B9V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B9V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B9V1-QX?
BZX58550-B9V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B9V1-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-B9V1-QX?
For technical support, including BZX58550-B9V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B9V1-QX requirements.
6.How does Aetrix verify that BZX58550-B9V1-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B9V1-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-B9V1-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B9V1-QX?
All BZX58550-B9V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B9V1-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-B9V1-QX part is unused and in its original packaging.
Return procedure for BZX58550-B9V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B9V1-QX Tags
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