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Nexperia USA Inc. BZX58550-C9V1X
- Part No.:
- BZX58550-C9V1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C9V1X.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
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Product details
Overview
BZX58550-C9V1X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 9.1 V regulation at 50 µA test current, with ±2 % tolerance, 100 Ω dynamic resistance at 5 mA, and 0.1 µA reverse leakage at rated voltage - optimized for portable battery-powered sensors and IoT node power rails.
For engineers reviewing the BZX58550-C9V1X datasheet, BZX58550-C9V1X pinout, BZX58550-C9V1X application, or BZX58550-C9V1X equivalent, key selection criteria include low-test-current regulation stability, thermal resistance under FR4 PCB mounting, differential resistance impact on load regulation, and cathode-anode polarity marking alignment in high-density layouts.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable output by conducting reverse current above its specified Zener breakdown voltage (9.1 V). Its 50 µA test current enables accurate regulation in microamp-level bias networks where traditional Zeners would exhibit excessive error.
The intentional minor rise in leakage current (per AN90031) improves switching speed and reduces noise in feedback paths of LDOs and ADC references. Thermal resistance from junction to ambient is 350 K/W when mounted on an FR4 PCB with 35 mm² copper at the cathode tab - critical for predicting voltage drift under ambient temperature variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal at IZ = 50 µA; ±2 % tolerance ensures tight reference accuracy in low-power analog signal chains |
| Differential Resistance (rdiff) | 100 Ω max at IZ = 5 mA; defines load regulation sensitivity - lower values minimize output voltage shift with current changes |
| Reverse Leakage (IR) | 0.1 µA max at VR = 7.3 V; enables stable operation in nanoamp-biased sensor front-ends without parasitic current draw |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; supports use as clamping diode in dual-role protection/reference designs |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper; sets maximum continuous power budget in thermally constrained layouts |
| Package | SOD523 (SC-79); 1.2 mm × 0.8 mm × 0.6 mm body size enables placement in space-constrained wearables and miniaturized modules |
Pinout & Package
Ultra-compact SOD523 (SC-79) surface-mount plastic package with flat lead profile and cathode band marking. Dimensions: 1.25 mm (L) × 0.85 mm (W) × 0.65 mm (H), 0.34 mm lead pitch, 0.58 mm lead width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked side with bar; connects to regulated voltage rail - reverse-biased operation requires this terminal at higher potential than anode |
| 2 | Anode (A) | Unmarked terminal; ties to ground or lower-potential node - current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable voltage reference in circuits where supply current must remain below 100 µA |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - reduces switching transients and broadband noise in feedback loops |
| Tight voltage tolerance | ±2 % tolerance series - eliminates need for post-layout trimming in production-grade portable instrumentation |
| Thermally enhanced mounting | 350 K/W Rth(j-a) with 35 mm² cathode copper - allows predictable derating up to 85 °C ambient without external heatsinking |
Applications
| Portable Sensor Biasing | ADC Reference Stabilization |
|---|---|
|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Shunt voltage reference regulating 9.1 V rail for sensor bridge bias, operating continuously at 20 µA quiescent current. Use Value: ±2 % tolerance and 100 Ω rdiff ensure <0.2 % full-scale error contribution to 12-bit ADC measurements over temperature. |
Use Scenario: Supplying clean reference voltage to SAR ADCs in wireless medical patch devices. IC Role / Device Role / Timing Role: Low-noise Zener reference replacing larger-footprint TL431-based solutions in 3.3 V–9.1 V conversion stages. Use Value: Optimized leakage behavior minimizes reference noise floor, enabling effective resolution >10.5 ENOB at 1 MSPS sampling. |
| IoT Node Power Rail Clamping | Low-Power LDO Feedback Divider |
|
Use Scenario: Protecting RF transceiver supply pins against transient overvoltage in NB-IoT modules. IC Role / Device Role / Timing Role: Fast-switching Zener clamp absorbing ESD pulses while maintaining 9.1 V ceiling during normal operation. Use Value: 0.1 µA leakage at 7.3 V prevents standby current degradation; 40 W non-repetitive surge rating handles IEC 61000-4-2 Level 4 events. |
Use Scenario: Setting precise output voltage in micropower LDO feedback networks for wearable health sensors. IC Role / Device Role / Timing Role: High-impedance voltage reference node in resistive divider, drawing <50 µA from LDO output. Use Value: 50 µA test current specification matches typical divider current, eliminating interpolation error in feedback voltage setting. |
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 | Same 9.1 V nominal voltage but ±5 % tolerance instead of ±2 % | Acceptable where system-level calibration compensates for initial voltage error | Select when cost sensitivity outweighs need for factory-trimmed accuracy |
| MMSZ5240B | 9.1 V Zener, SOD-123 package (2.7 mm × 1.4 mm), 500 mW Ptot, 150 Ω rdiff | Higher power handling but 3× larger footprint and looser regulation at low current | Choose only if board layout permits larger package and thermal margin exceeds 300 mW |
Compared with BZX58550-B9V1, the C9V1X offers tighter tolerance for uncalibrated systems; compared with MMSZ5240B, it provides superior low-current regulation and 40 % smaller area - critical for sub-10 mm² PCB real estate budgets.
Availability
BZX58550-C9V1X is available at Aetrix Electronics and suitable for portable sensor biasing, ADC reference stabilization, IoT node power rail clamping, and low-power LDO feedback divider applications requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX58550-C9V1X 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, logic, and MOSFET components for automotive, industrial, and consumer markets.
The BZX58550 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-constrained edge devices where size, leakage, and test-current accuracy are design-critical.
FAQ
What is the maximum continuous reverse current the BZX58550-C9V1X can sustain at 25 °C ambient?
The device sustains up to 33 mA continuous reverse current at 25 °C ambient when mounted on an FR4 PCB with 35 mm² copper at the cathode tab, calculated from its 300 mW total power dissipation rating and 9.1 V Zener voltage (300 mW ÷ 9.1 V ≈ 33 mA). Derating is required above 25 °C per its 350 K/W thermal resistance.
How does the "intentional minor rise of leakage current" affect circuit noise performance?
Per Application Note AN90031, this controlled leakage increase reduces minority-carrier recombination noise and suppresses high-frequency oscillation in feedback paths. Measured data shows >15 dB reduction in 10 kHz–1 MHz noise floor versus legacy Zeners - directly improving SNR in precision ADC references.
Can the BZX58550-C9V1X be used in forward conduction mode as a standard diode?
Yes - its forward voltage is specified at 0.9 V max at 10 mA, matching typical silicon diode behavior. However, its 200 mA absolute maximum forward current and 0.9 V VF make it suitable only for low-current signal steering or protection, not power rectification. Forward conduction is not its primary function.
Is the SOD523 package compatible with standard reflow soldering profiles for lead-free assembly?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The recommended peak temperature is 260 °C for ≤ 30 seconds, with ramp-up rate ≤ 3 °C/s. Figure 10 in the datasheet provides the exact solder land pattern (1.2 mm × 0.5 mm pads, 0.4 mm spacing) for reliable joint formation.
BZX58550-C9V1X 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-C9V1X FAQ
1.How can I place an order for BZX58550-C9V1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C9V1X 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-C9V1X reliable?
The price and inventory of BZX58550-C9V1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C9V1X is usually 5 days.
3.What payment methods are accepted for BZX58550-C9V1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C9V1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C9V1X?
BZX58550-C9V1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C9V1X 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-C9V1X?
For technical support, including BZX58550-C9V1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C9V1X requirements.
6.How does Aetrix verify that BZX58550-C9V1X is sourced from the original manufacturer or authorized distributors?
All BZX58550-C9V1X 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-C9V1X meets industry standards.
7.What is the process for return or replacement of BZX58550-C9V1X?
All BZX58550-C9V1X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C9V1X, 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-C9V1X part is unused and in its original packaging.
Return procedure for BZX58550-C9V1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C9V1X 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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BZT52C15-7-F
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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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