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Nexperia USA Inc. BZX58550-C3V6-QX
- Part No.:
- BZX58550-C3V6-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C3V6-QX.pdf
- Description:
- DIODE ZENER 3.6V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:1,729
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Product details
Overview
BZX58550-C3V6-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, battery-powered systems. It delivers a nominal 3.6 V regulation at 50 µA test current, with ±2 % tolerance, 95 Ω dynamic impedance at 5 mA, and 2.0 µA max reverse leakage at 2.0 V, enabling stable operation in automotive sensor interfaces and portable IoT power rails.
For engineers reviewing the BZX58550-C3V6-Q datasheet, BZX58550-C3V6-Q pinout, BZX58550-C3V6-Q application, or BZX58550-C3V6-Q equivalent, this page provides verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data, and automotive-grade reliability context essential for low-power analog design and BOM validation.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 3.42 V to 3.78 V at 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance of ≤95 Ω at 5 mA. Its low 50 µA test current enables minimal quiescent draw in always-on circuits.
The device uses silicon planar epitaxial technology and is qualified per AEC-Q101 for automotive use, supporting ambient temperatures from −55 °C to +150 °C and junction temperatures up to 150 °C. Thermal resistance from junction to ambient is 350 K/W on FR4 PCB with 35 mm² copper at cathode tab.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V at IZ = 50 µA - precise reference for low-bias analog stages |
| Voltage Tolerance | ±2 % - tight regulation for stable MCU reset thresholds or ADC reference scaling |
| Differential Resistance | ≤95 Ω at IZ = 5 mA - low impedance ensures minimal output voltage shift under load variation |
| Reverse Leakage Current | ≤2.0 µA at VR = 2.0 V - ultra-low standby current preserves battery life in wearables |
| Forward Voltage | ≤0.9 V at IF = 10 mA - supports bidirectional protection or clamp functionality |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - sufficient headroom for transient overvoltage clamping in 3.3 V domains |
| Package | SOD523 (SC-79), 1.2 × 0.8 × 0.6 mm - ultra-small footprint for high-density PCBs in automotive ECUs |
Pinout & Package
SOD523 (SC-79) surface-mount plastic package with flat lead profile, 2-terminal configuration, and cathode marked by a visible bar on the body 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 during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor signal conditioning |
| Low test current (50 µA) | Enables use in microamp-level bias networks without compromising regulation accuracy |
| Optimized leakage profile | C-series variant features intentional minor leakage rise for improved switching speed and noise reduction per AN90031 |
| Thermal robustness | 150 °C max junction temperature and −55 °C to +150 °C operating ambient range support under-hood deployment |
| Ultra-compact footprint | 1.2 mm × 0.8 mm body area saves >60 % board space vs. SOD323 in wearable and telematics designs |
Applications
| Automotive Cabin Sensor Interface | Portable Medical Pulse Oximeter |
|---|---|
Use Scenario: Regulating reference voltage for analog front-end of CO₂ and humidity sensors in HVAC control units. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 3.6 V bias to op-amps and ADC input stages. Use Value: ±2 % tolerance and −3.5 mV/K tempco ensure <±10 mV drift across −40 °C to +85 °C, meeting ASIL-B signal integrity requirements. |
Use Scenario: Supplying precision bias to photodiode transimpedance amplifiers in battery-powered pulse oximeters. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator maintaining constant 3.6 V reference under varying battery discharge profiles. Use Value: 2.0 µA max reverse leakage at 2.0 V extends single-cell coin cell lifetime beyond 12 months in standby mode. |
| Industrial Wireless Node Power Management | Smart Home Motion Detector Bias Network |
Use Scenario: Generating stable reference for LDO enable threshold and RF transceiver VCO tuning voltage in LoRaWAN edge nodes. IC Role / Device Role / Timing Role: Precision shunt regulator in low-quiescent current power tree, operating at 50 µA test point. Use Value: 95 Ω dynamic impedance minimizes voltage droop during 100 µA load transients, preserving RF frequency stability. |
Use Scenario: Providing regulated bias to PIR sensor amplifier and microcontroller reset circuit in battery-operated occupancy sensors. IC Role / Device Role / Timing Role: Dual-function Zener: voltage reference for analog chain and overvoltage clamp for ESD protection. Use Value: 0.9 V forward voltage enables effective bidirectional clamping, suppressing 8 kV HBM ESD pulses without external TVS. |
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-B3V6-Q | Same 3.6 V nominal voltage but ±5 % tolerance (vs. ±2 %); higher 100 Ω rdiff at 5 mA | Acceptable where cost sensitivity outweighs precision; less suitable for ADC references requiring <±10 mV error | Select when budget constraints dominate and thermal drift compensation is implemented externally |
| MMSZ5226B-7-F | 3.3 V nominal, ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, 100 Ω rdiff | Larger footprint and higher power rating; not AEC-Q101 qualified; lacks optimized leakage for fast switching | Choose only for non-automotive, non-space-constrained designs where 3.3 V (not 3.6 V) matches system rail |
Compared with BZX58550-B3V6-Q, the C-series offers tighter tolerance and lower impedance for precision analog use; versus MMSZ5226B-7-F, it provides automotive qualification, smaller size, and lower leakage-critical for battery longevity and signal integrity in compact, safety-relevant systems.
Availability
BZX58550-C3V6-Q is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable medical devices, industrial wireless nodes, and smart home motion detectors requiring stable component supply with AEC-Q101 assurance and long-term lifecycle continuity.
Supply support for BZX58550-C3V6-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 discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current voltage reference and biasing in automotive, industrial, and portable electronics where space, power, and reliability are critical.
FAQ
What is the maximum reverse voltage the BZX58550-C3V6-Q can withstand before breakdown?
The BZX58550-C3V6-Q is rated for a nominal Zener voltage of 3.6 V at 50 µA, with a guaranteed working range of 3.42 V to 3.78 V. It does not have a separate "maximum reverse voltage" rating; operation above 3.78 V at 50 µA enters the specified breakdown region. Absolute maximum reverse voltage is limited by the 270 mW power dissipation limit at 25 °C ambient on standard FR4 PCB.
Is the BZX58550-C3V6-Q suitable for use as an ESD protection device?
No-it is not designed or characterized for ESD protection. While its 0.9 V forward voltage allows basic clamping, it lacks the defined IEC 61000-4-2 surge capability, low clamping voltage under fast transients, or specified capacitance required for reliable ESD suppression. Dedicated TVS diodes like PESD5V0S1BA should be used instead.
How does the C-series differ from the B-series in the BZX58550-Q family?
The C-series (e.g., BZX58550-C3V6-Q) offers ±2 % voltage tolerance and optimized leakage current for faster switching and lower noise, per application note AN90031. The B-series has ±5 % tolerance and standard leakage. Both share identical SOD523 packaging, AEC-Q101 qualification, and thermal specifications.
Can the BZX58550-C3V6-Q operate continuously at its 300 mW power rating?
No-300 mW is the maximum total power dissipation at Tamb ≤ 25 °C with 35 mm² copper area at the cathode tab. Continuous operation at full rating requires strict thermal management. At 85 °C ambient, derating reduces usable power to approximately 180 mW based on the 350 K/W Rth(j-a) value and 150 °C max junction temperature.
BZX58550-C3V6-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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 2 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-C3V6-QX FAQ
1.How can I place an order for BZX58550-C3V6-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C3V6-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-C3V6-QX reliable?
The price and inventory of BZX58550-C3V6-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-C3V6-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C3V6-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C3V6-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C3V6-QX?
BZX58550-C3V6-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C3V6-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-C3V6-QX?
For technical support, including BZX58550-C3V6-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C3V6-QX requirements.
6.How does Aetrix verify that BZX58550-C3V6-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C3V6-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-C3V6-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C3V6-QX?
All BZX58550-C3V6-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C3V6-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-C3V6-QX part is unused and in its original packaging.
Return procedure for BZX58550-C3V6-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C3V6-QX Tags
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