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Nexperia USA Inc. BZX58550-C7V5-QX
- Part No.:
- BZX58550-C7V5-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C7V5-QX.pdf
- Description:
- DIODE ZENER 7.5V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
BZX58550-C7V5-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 7.5 V regulation at 50 µA test current, with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX58550-C7V5-Q datasheet, BZX58550-C7V5-Q pinout, BZX58550-C7V5-Q application, or BZX58550-C7V5-Q equivalent, this page provides verified electrical specs, thermal behavior, cathode/anode terminal mapping, automotive-grade reliability data, and real-world use context for battery-powered sensors and ECU voltage monitoring.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable 7.5 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 coin-cell or energy-harvesting systems.
The C-series variant features tighter ±2 % VZ tolerance, 0.1 µA max reverse leakage at rated VR, and intentional minor leakage optimization per AN90031 to reduce switching noise-distinct from B-series' ±5 % tolerance and higher leakage profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V at IZ = 50 µA - defines precise reference point for low-bias analog circuits |
| Voltage Tolerance | ±2 % - ensures 7.35 V to 7.65 V regulation window under production variation |
| Differential Resistance | 80 Ω at IZ = 5 mA - limits output voltage shift to ≤0.4 V per 5 mA load change |
| Forward Voltage | 0.9 V at IF = 10 mA - enables predictable forward conduction for polarity protection or clamping |
| 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 | −55 °C to +150 °C - supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress-test standard for discrete semiconductors |
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 (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; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby power in always-on sensor nodes and IoT edge devices |
| Tight voltage tolerance | ±2 % for C-series - improves accuracy of ADC references and comparator thresholds without trimming |
| Optimized leakage profile | Intentional minor rise per AN90031 - suppresses high-frequency noise in sensitive analog front-ends |
| Automotive qualification | AEC-Q101 compliant - eliminates requalification effort for dashboard modules, body control units, and ADAS sensors |
| Ultra-compact footprint | SOD523 package - saves >60 % board area vs. SOD323, enabling dense routing in wearables and compact ECUs |
Applications
| Automotive Cabin Sensor Node | Portable Medical Glucose Monitor |
|---|---|
Use Scenario: Voltage reference for 12-bit ADC measuring thermistor-based cabin temperature. IC Role / Device Role / Timing Role: Shunt Zener regulator providing stable 7.5 V reference to ADC VREF pin. Use Value: ±2 % tolerance ensures <±1.5 °C measurement error over full temperature range without calibration. |
Use Scenario: Bias supply for photodiode amplifier in disposable blood glucose strip reader. IC Role / Device Role / Timing Role: Low-current voltage reference establishing transimpedance amplifier offset. Use Value: 50 µA test current enables operation from CR2032 coin cell for >2 years shelf life. |
| Industrial PLC Input Protection | Smart Home Smoke Detector MCU Supply |
Use Scenario: Overvoltage clamp on 24 V DC analog input channel. IC Role / Device Role / Timing Role: Reverse-biased Zener limiting transient spikes before signal conditioning stage. Use Value: 80 Ω dynamic resistance ensures clamped voltage stays within ±0.8 V of 7.5 V during 100 ns surges. |
Use Scenario: Regulated bias for ultra-low-power ARM Cortex-M0+ MCU during smoke alarm self-test mode. IC Role / Device Role / Timing Role: Standby voltage reference maintaining RTC and sensor interface stability. Use Value: AEC-Q101 qualification guarantees reliable startup after thermal cycling in attic installations. |
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-B7V5-Q | ±5 % tolerance, higher leakage (≤1 µA), no AN90031 leakage tuning | Acceptable where cost sensitivity outweighs reference accuracy needs | Select when budget constraints dominate and ±5 % VZ drift is acceptable in non-critical biasing |
| MMSZ5236B-7-F | Same 7.5 V nominal, ±5 % tolerance, SOD-123 package (2.7 mm × 1.4 mm) | Larger footprint limits use in ultra-dense layouts; lacks AEC-Q101 certification | Choose only for non-automotive industrial designs where board space is not constrained |
Compared with BZX58550-B7V5-Q, this C-series part trades higher unit cost for ±2 % accuracy and noise-optimized leakage-critical for precision analog sensing. Versus MMSZ5236B-7-F, it delivers AEC-Q101 compliance and 55 % smaller footprint, justifying selection in automotive and portable medical designs.
Availability
BZX58550-C7V5-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial PLC input protection, and smart home smoke detector MCUs requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX58550-C7V5-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 core R&D in Nijmegen, Netherlands.
This device belongs to the BZX58550-Q series of AEC-Q101-qualified Zener diodes engineered specifically for low-current voltage regulation in automotive and portable electronics where space, power, and reliability are critical.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-C7V5-Q at 85 °C ambient?
At 85 °C ambient, derated power dissipation is 210 mW based on thermal resistance of 350 K/W (junction-to-ambient with 35 mm² cathode copper) and 150 °C max junction temperature. This ensures safe operation without exceeding thermal limits in automotive under-dash environments.
How does the "intentional minor rise of leakage current" improve performance?
Per Application Note AN90031, this controlled leakage profile reduces high-frequency noise coupling into adjacent analog circuitry-particularly beneficial in precision sensor front-ends where traditional Zeners induce switching artifacts during bias transitions.
Can BZX58550-C7V5-Q replace BZX58550-B7V5-Q in an existing design?
Yes, pin-for-pin and functionally compatible, but requires validation of system-level accuracy impact: the tighter ±2 % tolerance may alter ADC gain calibration, and lower leakage affects bias network current draw-both must be rechecked in final hardware.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes-the device is qualified for JEDEC J-STD-020D-compliant reflow, with peak temperature up to 260 °C. Figure 10 in the datasheet specifies exact solder land dimensions (1.2 mm × 0.5 mm pads, 0.4 mm spacing) to prevent tombstoning during assembly.
BZX58550-C7V5-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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.7 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-C7V5-QX FAQ
1.How can I place an order for BZX58550-C7V5-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C7V5-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-C7V5-QX reliable?
The price and inventory of BZX58550-C7V5-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-C7V5-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C7V5-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C7V5-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C7V5-QX?
BZX58550-C7V5-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C7V5-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-C7V5-QX?
For technical support, including BZX58550-C7V5-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C7V5-QX requirements.
6.How does Aetrix verify that BZX58550-C7V5-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C7V5-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-C7V5-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C7V5-QX?
All BZX58550-C7V5-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C7V5-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-C7V5-QX part is unused and in its original packaging.
Return procedure for BZX58550-C7V5-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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