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Nexperia USA Inc. BZX58550-C5V1-QX
- Part No.:
- BZX58550-C5V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C5V1-QX.pdf
- Description:
- DIODE ZENER 5.1V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:557
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Product details
Overview
BZX58550-C5V1-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 automotive and portable electronics. It delivers a nominal 5.1 V regulation at 50 µA test current, with ±2 % tolerance, 500 Ω differential resistance at 5 mA, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the BZX58550-C5V1-Q datasheet, BZX58550-C5V1-Q pinout, BZX58550-C5V1-Q application, or BZX58550-C5V1-Q equivalent, key selection criteria include low-test-current regulation stability, thermal resistance of 350 K/W on 35 mm² cathode copper, and intentional leakage optimization for noise-sensitive analog rails.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 4.85 V to 5.36 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.0 mV/K and diode capacitance of 130 pF at 0 V. Its low 50 µA test current enables stable regulation in ultra-low-power sensor bias networks.
The device features an intentional minor rise in leakage current-per AN90031-to reduce switching transients and improve noise performance in high-frequency analog front-ends. It is rated for 300 mW total power dissipation on FR4 PCB with 35 mm² cathode copper area and supports junction temperatures up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at IZ = 50 µA - precise reference for low-bias analog circuits |
| Voltage Tolerance | ±2 % - tight regulation for stable sensor excitation and ADC reference |
| Differential Resistance | 500 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 - enables use as clamping diode in bidirectional protection schemes |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on 35 mm² Cu - sufficient headroom for continuous operation in automotive cabin modules |
| Junction Temperature | 150 °C maximum - supports under-dash and engine bay placement per AEC-Q101 |
| Thermal Resistance | 350 K/W (j-a, 35 mm² Cu) - enables predictable thermal rise in compact PCB layouts |
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 output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 |
| Low test current operation | Specified at 50 µA - minimizes quiescent current draw in battery-powered systems |
| Optimized leakage profile | Intentional minor leakage rise (BZX58550-B/C series) reduces switching noise in RF and precision analog stages |
| Ultra-compact footprint | SOD523 package saves >60 % board area vs. SOD323 - critical for wearables and smart sensors |
| Stable temperature coefficient | −2.0 mV/K at 5.1 V - enables predictable drift compensation in wide-temperature industrial designs |
Applications
| Automotive Cabin Sensors | Portable Medical Wearables |
|---|---|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Zener regulator providing stable 5.1 V bias to sensor signal conditioning circuitry. Use Value: ±2 % tolerance and −2.0 mV/K TC ensure <±10 mV drift over −40 °C to +125 °C, meeting ASIL-B functional safety margins. |
Use Scenario: Low-power voltage reference for ECG front-end amplifiers in Bluetooth-enabled patches. IC Role / Device Role / Timing Role: Precision shunt regulator supplying clean 5.1 V to op-amp rails from coin-cell sources. Use Value: 50 µA test current enables regulation down to 2 µA standby leakage, extending battery life beyond 14 days. |
| Industrial IoT Edge Nodes | Smart Home Motion Detectors |
Use Scenario: Reference source for 12-bit SAR ADC measuring thermistor-based temperature in predictive maintenance gateways. IC Role / Device Role / Timing Role: Stable Zener element maintaining ADC full-scale accuracy across 85 °C ambient range. Use Value: 500 Ω dynamic impedance limits reference error to <0.5 LSB under 100 µA load variation from ADC sampling pulses. |
Use Scenario: Bias supply for PIR sensor amplifier and microcontroller reset monitoring in battery-operated occupancy sensors. IC Role / Device Role / Timing Role: Dual-role device: Zener clamp for ESD protection and low-current voltage reference. Use Value: 0.9 V forward voltage allows bidirectional clamping; 300 mW rating sustains transient surges without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B5V1-Q | Same 5.1 V nominal voltage but ±5 % tolerance (vs. ±2 %); higher leakage optimized for faster switching | Preferred in digital I/O clamping where precision is secondary to transient response | Select when cost sensitivity outweighs voltage accuracy requirements and noise reduction is not critical |
| MMSZ5231B-7-F | 5.1 V ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW rating, 170 Ω rdiff at 20 mA | Higher power handling and lower dynamic impedance suit higher-current analog rails | Choose for non-automotive applications requiring >200 µA load current or legacy SOD-123 footprint compatibility |
Compared with BZX58550-B5V1-Q, the C-series offers tighter tolerance and lower TC for measurement-critical roles; versus MMSZ5231B-7-F, it trades power capacity for 55 % smaller footprint and AEC-Q101 compliance essential for automotive deployment.
Availability
BZX58550-C5V1-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical wearables, industrial IoT edge nodes, and smart home motion detectors requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-C5V1-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 headquartered in Nijmegen, Netherlands, specializing in high-volume, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for low-current, high-stability voltage regulation in space- and power-constrained automotive subsystems.
FAQ
What is the maximum reverse current at 5.1 V regulation for BZX58550-C5V1-Q?
At nominal 5.1 V regulation (VZ = 4.85–5.36 V), the reverse current is specified at 50 µA test condition. Under actual operating conditions at 5.1 V, typical reverse current remains ≤1.0 µA at 25 °C per Table 8, rising to ≤3.0 µA at 125 °C - enabling ultra-low-power biasing in always-on sensor nodes.
Can BZX58550-C5V1-Q be used in forward conduction mode?
Yes - its forward voltage is characterized at 0.9 V @ 10 mA (pulse-tested). While primarily designed for reverse-bias Zener operation, it functions as a standard silicon diode in forward bias, supporting dual-use roles such as ESD clamping on I/O lines alongside voltage reference duties.
How does the "intentional minor rise of leakage current" benefit circuit design?
This feature, documented in AN90031, slightly increases reverse leakage near breakdown to dampen parasitic oscillations and reduce high-frequency noise coupling. It improves signal integrity in RF receiver bias networks and precision op-amp references without compromising regulation accuracy or long-term stability.
Is thermal derating required above 25 °C ambient?
Yes - power dissipation must be linearly derated above 25 °C using the 350 K/W junction-to-ambient thermal resistance (for 35 mm² cathode copper). At 85 °C ambient, maximum allowable power drops to 195 mW, ensuring junction temperature stays within the 150 °C limit for sustained AEC-Q101-compliant operation.
BZX58550-C5V1-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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-C5V1-QX FAQ
1.How can I place an order for BZX58550-C5V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C5V1-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-C5V1-QX reliable?
The price and inventory of BZX58550-C5V1-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-C5V1-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C5V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C5V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C5V1-QX?
BZX58550-C5V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C5V1-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-C5V1-QX?
For technical support, including BZX58550-C5V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C5V1-QX requirements.
6.How does Aetrix verify that BZX58550-C5V1-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C5V1-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-C5V1-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C5V1-QX?
All BZX58550-C5V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C5V1-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-C5V1-QX part is unused and in its original packaging.
Return procedure for BZX58550-C5V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C5V1-QX Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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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
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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