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Nexperia USA Inc. BZX58550-B5V6-QX
- Part No.:
- BZX58550-B5V6-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B5V6-QX.pdf
- Description:
- DIODE ZENER 5.6V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,003
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Product details
Overview
BZX58550-B5V6-QX from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 5.6 V nominal regulation at 50 µA test current with ±2 % tolerance, 400 Ω differential resistance at 5 mA, and qualified to AEC-Q101 for automotive power rail stabilization.
For engineers reviewing the BZX58550-B5V6-QX datasheet, BZX58550-B5V6-QX pinout, BZX58550-B5V6-QX application, or BZX58550-B5V6-QX equivalent, this page delivers verified electrical specs, thermal behavior, cathode/anode terminal mapping, automotive-grade reliability context, and direct alternatives for low-bias voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 5.49 V to 5.71 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.0 mV/K and diode capacitance of 120 pF at 0 V and 1 MHz. Its low 50 µA test current enables stable regulation in ultra-low-power sensor biasing and battery monitoring circuits.
The device features intentional leakage control optimized for fast switching and noise reduction per AN90031, and achieves 300 mW total power dissipation on FR4 PCB with 35 mm² copper area at the cathode tab. Junction temperature is rated up to 150 °C, supporting under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.6 V at IZ = 50 µA - precise reference for low-current analog sensing and microcontroller reset thresholds |
| Voltage Tolerance | ±2 % - tight regulation window enabling accurate voltage clamping without external trimming |
| Differential Resistance | 400 Ω at IZ = 5 mA - low dynamic impedance ensures minimal output voltage shift under load variation |
| Forward Voltage | 0.9 V at IF = 10 mA - defines forward conduction threshold for polarity-sensitive protection schemes |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C with 35 mm² Cu - sets maximum continuous DC power handling on standard PCB layout |
| Junction Temperature Limit | 150 °C - enables operation in engine control units and ADAS modules with high ambient thermal stress |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test qualification for discrete semiconductors |
Pinout & Package
SOD523 (SC-79) surface-mounted plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, ultra-small footprint ideal for space-constrained automotive ECUs and portable IoT sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by bar on package - reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail - completes reverse-bias path for regulation current flow |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in micropower systems where quiescent current must remain below 100 µA |
| Automotive qualification | AEC-Q101 compliant - supports deployment in infotainment, body control, and lighting modules without additional qualification effort |
| Optimized leakage profile | Intentional minor rise in leakage current - reduces switching noise and improves transient response in feedback paths |
| Thermal performance | Rth(j-a) = 350 K/W with 35 mm² cathode copper - allows reliable 270–300 mW dissipation in compact layouts |
| Small-outline packaging | SOD523 footprint - saves >60 % board area versus SOD-123 while maintaining solder joint reliability |
Applications
| Automotive Cabin Sensor Biasing | Portable Medical Device Reference |
|---|---|
Use Scenario: Supplying stable 5.6 V bias to MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Zener voltage reference providing precision excitation voltage independent of battery voltage sag. Use Value: Maintains sensor accuracy across 9–16 V vehicle supply range with <±0.1 V drift over −40 to +125 °C. |
Use Scenario: Generating fixed reference for ADC input scaling in handheld pulse oximeters powered by coin cells. IC Role / Device Role / Timing Role: Low-current shunt regulator establishing known voltage node for ratiometric measurement calibration. Use Value: Draws only 50 µA, extending single-CR2032 battery life beyond 12 months in standby operation. |
| Industrial PLC Input Protection | Smart Meter Voltage Monitoring |
Use Scenario: Clamping 24 V digital input signals to protect FPGA I/O banks from overvoltage transients. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting input voltage to 5.6 V during ESD or surge events. Use Value: 400 Ω dynamic impedance ensures clamping voltage stays within FPGA absolute maximum rating during 1 kV ESD pulses. |
Use Scenario: Monitoring AC mains-derived DC rails in electricity meters to detect brownout or overvoltage conditions. IC Role / Device Role / Timing Role: Precision voltage threshold detector feeding comparator input for fault flag generation. Use Value: ±2 % tolerance guarantees detection accuracy within ±0.11 V at 5.6 V, meeting IEC 62053-21 Class 0.5 requirements. |
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-C5V6-Q | ±5 % tolerance (vs. ±2 %), higher leakage at VR = 5.6 V | Acceptable where cost sensitivity outweighs precision requirement | Select when budget constraints dominate and ±5 % regulation error is acceptable in non-critical biasing |
| MMSZ5232B-7-F | Same 5.6 V nominal, ±5 % tolerance, SOD-123 package (2.7 × 1.4 mm) | Larger footprint; higher Ptot = 500 mW but no AEC-Q101 qualification | Choose for industrial non-automotive designs needing higher power margin and legacy footprint compatibility |
Compared with BZX58550-C5V6-Q, the BZX58550-B5V6-QX offers tighter tolerance and lower leakage for precision biasing; versus MMSZ5232B-7-F, it provides AEC-Q101 compliance and 45 % smaller area at the cost of 300 mW vs. 500 mW power rating.
Availability
BZX58550-B5V6-QX is available at Aetrix Electronics and suitable for automotive cabin electronics, portable medical instrumentation, industrial PLC input stages, and smart meter voltage supervision requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-B5V6-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade robustness.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current voltage regulation in space- and power-constrained automotive and portable electronics.
FAQ
What is the maximum continuous reverse current the BZX58550-B5V6-QX can sustain at 25 °C ambient?
The device supports up to 200 mA forward current per limiting values, but for Zener operation, the maximum continuous reverse current is determined by power dissipation: at 5.6 V and 300 mW rating, IZ(max) = 300 mW / 5.6 V ≈ 53.6 mA. This assumes adequate PCB copper area (35 mm² at cathode) and ambient ≤25 °C.
Does the BZX58550-B5V6-QX require a series resistor in typical Zener regulator configurations?
Yes - a series current-limiting resistor is mandatory to set the Zener operating point. For example, with a 12 V supply and target IZ = 50 µA, RS = (12 V − 5.6 V) / 50 µA = 128 kΩ. The resistor ensures stable biasing while preventing thermal runaway under varying load conditions.
How does the −2.0 mV/K temperature coefficient affect regulation accuracy over temperature?
Over a −40 °C to +125 °C range (165 K span), the voltage drift is −2.0 mV/K × 165 K = −330 mV. Thus, regulation shifts from ~5.75 V at −40 °C to ~5.42 V at +125 °C - a total variation of ±165 mV around nominal 5.6 V, critical for high-accuracy references.
Can the BZX58550-B5V6-QX be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing spread in VZ, causing current hogging in parallel configurations. Even matched units risk thermal instability due to positive temperature coefficient of dynamic resistance. Use a single higher-power Zener or active regulation instead.
BZX58550-B5V6-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):
- 5.6 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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-B5V6-QX FAQ
1.How can I place an order for BZX58550-B5V6-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B5V6-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-B5V6-QX reliable?
The price and inventory of BZX58550-B5V6-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-B5V6-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B5V6-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B5V6-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B5V6-QX?
BZX58550-B5V6-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B5V6-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-B5V6-QX?
For technical support, including BZX58550-B5V6-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B5V6-QX requirements.
6.How does Aetrix verify that BZX58550-B5V6-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B5V6-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-B5V6-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B5V6-QX?
All BZX58550-B5V6-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B5V6-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-B5V6-QX part is unused and in its original packaging.
Return procedure for BZX58550-B5V6-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B5V6-QX Tags
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