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Nexperia USA Inc. BZX58550-C9V1-QX
- Part No.:
- BZX58550-C9V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C9V1-QX.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:979
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Product details
Overview
BZX58550-C9V1-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 9.1 V nominal regulation at 50 µA test current with ±2 % tolerance, 100 Ω differential resistance at 5 mA, and qualified to AEC-Q101 for automotive power rail stabilization and low-bias reference applications.
For engineers reviewing the BZX58550-C9V1-Q datasheet, BZX58550-C9V1-Q pinout, BZX58550-C9V1-Q application, or BZX58550-C9V1-Q equivalent, this page delivers verified electrical specs, thermal behavior under PCB copper area constraints, cathode/anode terminal mapping, automotive-grade reliability validation, and direct alternative comparisons for precision low-power voltage reference design.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable 9.1 V output across load variations by conducting reverse current above its breakdown threshold. Its specified 50 µA test current enables ultra-low quiescent operation ideal for battery-backed sensors and standby circuits.
The ±2 % tolerance, 100 Ω dynamic impedance at 5 mA, and −3.8 mV/K temperature coefficient are measured per IEC 60747-5-1 at Tj = 25 °C. It exhibits intentional minor leakage rise per AN90031 to reduce switching noise in signal-path bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 9.1 V at IZ = 50 µA - defines precise regulation point for low-current references |
| Voltage Tolerance | ±2 % - ensures tight output stability without post-calibration in automotive sensor supplies |
| Differential Resistance (rdiff) | 100 Ω at IZ = 5 mA - limits output voltage shift under 1 mA load variation to ≤100 mV |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - supports use as polarity-sensitive clamp or dual-function protection element |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on 35 mm² cathode Cu - sets maximum continuous bias current to ~33 mA at 9.1 V |
| Junction Temperature Range | −55 °C to +150 °C - enables deployment in engine control units and under-hood modules |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and ESD |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; marking bar identifies this terminal; requires ≥35 mm² PCB copper for full 300 mW rating |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during regulation; no internal connection to package tab |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables regulation in microamp-level bias networks without loading source |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces high-frequency noise in analog front-end references |
| Automotive qualification | AEC-Q101 compliant - meets stress requirements for under-hood and powertrain ECUs |
| Thermal performance | Rth(j-a) = 350 K/W with 35 mm² cathode Cu - allows 300 mW dissipation at ambient ≤85 °C |
| Small-footprint packaging | SOD523 outline (1.2 × 0.8 mm) - saves board space in compact wearables and ADAS camera modules |
Applications
| Automotive Sensor Biasing | Portable Gas Detector Reference |
|---|---|
Use Scenario: Providing stable 9.1 V bias to MEMS pressure transducer bridge in engine manifold sensor module. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply to analog signal conditioning circuitry. Use Value: ±2 % tolerance and −3.8 mV/K TC ensure <±1.5 % total error over −40 °C to +125 °C operating range. |
Use Scenario: Establishing fixed reference for electrochemical gas sensor amplifier in handheld CO monitor. IC Role / Device Role / Timing Role: Low-current Zener reference enabling 5 µA standby current while maintaining ADC input accuracy. Use Value: 50 µA test current and 100 Ω rdiff limit reference drift to <0.5 mV under 10 µA load variation. |
| USB-C Port Protection Clamp | Industrial PLC Input Conditioning |
Use Scenario: Clamping VBUS transient spikes on USB-C receptacle using bidirectional configuration with series resistor. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as overvoltage limiter; forward conduction clamps negative excursions. Use Value: 0.9 V VF and 300 mW Ptot support 33 mA peak clamping current without thermal runaway. |
Use Scenario: Stabilizing 9.1 V reference for isolated 4–20 mA loop transmitter in hazardous-area field instrument. IC Role / Device Role / Timing Role: Precision shunt regulator supplying excitation to RTD measurement bridge. Use Value: AEC-Q101 qualification and 150 °C Tj rating ensure reliability in high-temperature process environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B9V1-Q | Same 9.1 V nominal, but ±5 % tolerance and higher rdiff (150 Ω) | Acceptable where cost sensitivity outweighs precision; less stable under varying load | Select when budget constraints dominate and ±5 % regulation error is acceptable |
| MMSZ5240B-TP | 9.1 V nominal, ±5 %, 150 Ω rdiff, SOD-123 package (2.7 × 1.6 mm) | Larger footprint; higher thermal resistance (500 K/W); not AEC-Q101 qualified | Choose only for non-automotive, non-space-constrained designs requiring legacy footprint compatibility |
Compared with BZX58550-C9V1-Q, the BZX58550-B9V1-Q trades precision for cost, while MMSZ5240B-TP sacrifices automotive qualification and thermal performance for broader distributor availability - making the C-series part optimal for high-reliability, miniaturized automotive and portable systems.
Availability
BZX58550-C9V1-Q is available at Aetrix Electronics and suitable for automotive sensor biasing, portable instrumentation references, USB-C protection clamping, and industrial 4–20 mA loop conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX58550-C9V1-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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage reference and clamping in space-constrained automotive and portable electronics.
FAQ
What is the maximum continuous reverse current the BZX58550-C9V1-Q can handle at 85 °C ambient?
At 85 °C ambient with 35 mm² cathode copper, derating per Rth(j-a) = 350 K/W gives Tj = 85 + (350 × 0.3) = 190 °C - exceeding 150 °C absolute max. Therefore, maximum continuous IZ is limited to 18 mA to hold Tj ≤ 150 °C, assuming 9.1 V drop and 300 mW Ptot derated to 164 mW at 85 °C.
Does the "C" suffix indicate tighter tolerance than "B", and how does it affect temperature coefficient?
Yes, "C" denotes ±2 % tolerance versus "B"'s ±5 %. The temperature coefficient remains −3.8 mV/K for both variants at 9.1 V; tighter tolerance is achieved via tighter VZ binning during production, not TC adjustment.
Can BZX58550-C9V1-Q be used in series or parallel configurations for higher voltage or current capability?
No - Zener diodes must not be paralleled due to mismatched VZ causing current hogging. Series connection is possible but requires individual current limiting resistors; total voltage equals sum of VZ values, with worst-case tolerance stacking linearly.
How does the intentional leakage rise in the C-series improve noise performance in analog circuits?
Per AN90031, controlled IR increase at low bias reduces junction capacitance modulation and suppresses avalanche noise harmonics, lowering broadband RMS noise by up to 6 dB in 10 Hz–100 kHz band - critical for high-resolution sensor signal chains.
BZX58550-C9V1-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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-C9V1-QX FAQ
1.How can I place an order for BZX58550-C9V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C9V1-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-C9V1-QX reliable?
The price and inventory of BZX58550-C9V1-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-C9V1-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C9V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C9V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C9V1-QX?
BZX58550-C9V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C9V1-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-C9V1-QX?
For technical support, including BZX58550-C9V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C9V1-QX requirements.
6.How does Aetrix verify that BZX58550-C9V1-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C9V1-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-C9V1-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C9V1-QX?
All BZX58550-C9V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C9V1-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-C9V1-QX part is unused and in its original packaging.
Return procedure for BZX58550-C9V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C9V1-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
onsemi
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