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Nexperia USA Inc. BZX58550-B5V1-QX
- Part No.:
- BZX58550-B5V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B5V1-QX.pdf
- Description:
- DIODE ZENER 5.1V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,428
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Product details
Overview
BZX58550-B5V1-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 5.1 V regulation at 50 µA test current, with ±2 % tolerance, 300 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX58550-B5V1-Q datasheet, BZX58550-B5V1-Q pinout, BZX58550-B5V1-Q application, or BZX58550-B5V1-Q equivalent, key selection criteria include low-test-current regulation stability, ultra-small SMD footprint, thermal resistance under PCB copper area constraints, and automotive-grade reliability validation.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA - enabling stable reference generation in ultra-low-power circuits such as sensor bias networks and microcontroller reset supervisors. Its differential resistance of ≤600 Ω at 5 mA ensures minimal voltage shift under small load variations.
The device exhibits a temperature coefficient of −2.0 mV/K at 5.1 V, supporting predictable drift compensation in ambient-temperature-varying environments. Its 130 pF capacitance at 0 V and 1 MHz makes it suitable for DC/low-frequency regulation without compromising signal integrity in adjacent analog paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at IZ = 50 µA - enables precise low-bias voltage reference for portable electronics |
| Tolerance | ±2 % - supports tight regulation in feedback loops requiring high accuracy |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - defines safe continuous operation in compact layouts |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - limits output voltage variation under small dynamic load changes |
| Forward Voltage | 0.9 V at IF = 10 mA - confirms low-loss conduction in series protection or polarity detection roles |
| Reverse Current | ≤3.0 µA at VR = 3.0 V - ensures minimal leakage in standby or sleep-mode circuits |
| Thermal Resistance | 350 K/W junction-to-ambient (35 mm² Cu) - determines temperature rise under rated power in standard PCB mounting |
Pinout & Package
Package: SOD523 (SC-79), plastic surface-mounted, 2-lead, 1.2 mm × 0.8 mm × 0.6 mm body. Cathode identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker aligns with PCB silkscreen cathode band |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SMD footprint | SOD523 package (1.2 × 0.8 mm) enables placement in dense portable PCB layouts without sacrificing thermal performance |
| Low-test-current regulation | Specified at 50 µA - supports stable reference generation in micropower sensor nodes and battery-monitoring ICs |
| AEC-Q101 qualification | Validated for automotive applications including infotainment power rails and ADAS subsystem biasing |
| Controlled leakage profile | Optimized minor leakage rise improves switching speed and reduces noise in fast-response regulation circuits |
| Two-tolerance series | ±2 % (B-series) and ~±5 % (C-series) options allow cost/performance trade-off in volume production |
Applications
| Automotive Cabin Sensors | Portable Medical Wearables |
|---|---|
Use Scenario: Supplying stable 5.1 V bias to MEMS pressure and humidity sensors in vehicle cabin modules. IC Role / Device Role / Timing Role: Zener voltage reference providing regulation for analog front-end ADC reference and op-amp biasing. Use Value: ±2 % tolerance and −2.0 mV/K TC ensure <±15 mV total drift over −40 °C to +125 °C, meeting ASIL-B sensor accuracy requirements. |
Use Scenario: Generating precise reference voltage for ECG analog signal conditioning in battery-powered patch monitors. IC Role / Device Role / Timing Role: Low-current Zener regulator supplying clean 5.1 V to instrumentation amplifiers and SAR ADC references. Use Value: 50 µA test current enables regulation stability during multi-day battery operation with <1 µA quiescent draw in sleep mode. |
| Industrial IoT Edge Nodes | Smart Home Motion Detectors |
Use Scenario: Providing regulated supply to LoRaWAN transceiver bias circuitry in battery-operated environmental gateways. IC Role / Device Role / Timing Role: Voltage reference stabilizing LDO input for RF section, minimizing transmit power variation. Use Value: 300 mW power rating and 350 K/W Rth(j-a) allow sustained operation at 45 °C ambient without derating in sealed enclosures. |
Use Scenario: Setting threshold voltage for PIR sensor comparator stages in energy-harvesting motion detectors. IC Role / Device Role / Timing Role: Precision Zener defining hysteresis and trip point in ultra-low-power wake-up circuitry. Use Value: 130 pF capacitance avoids signal coupling into high-impedance sensing nodes, preserving detection sensitivity. |
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-C5V1-Q | ±5 % tolerance vs. ±2 %; identical package, pinout, and thermal specs | Acceptable where system-level calibration compensates for initial voltage error | Select when cost sensitivity outweighs need for factory-trimmed accuracy |
| MMSZ5231B-7-F | Same 5.1 V nominal, ±5 % tolerance, SOD-123 package (2.7 × 1.6 mm), higher Ptot = 500 mW | Requires larger PCB area but supports higher surge current in industrial transient environments | Choose when board space permits and higher power margin is required for ESD immunity |
Compared with BZX58550-C5V1-Q, the BZX58550-B5V1-Q offers tighter initial accuracy at identical size and automotive qualification; versus MMSZ5231B-7-F, it trades package area for superior thermal efficiency per mm² and lower leakage in sub-µA standby modes.
Availability
BZX58550-B5V1-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 across extended temperature ranges and long product lifecycles.
Supply support for BZX58550-B5V1-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 advanced packaging technologies.
The BZX58550-Q series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for space-constrained, battery-efficient applications demanding AEC-Q101 compliance and stable low-test-current regulation.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-B5V1-Q at 85 °C ambient?
At 85 °C ambient, the device's total power dissipation must be derated linearly from 300 mW at 25 °C using its specified thermal resistance of 350 K/W. This yields a maximum continuous Ptot of approximately 193 mW to maintain Tj ≤ 150 °C, assuming standard FR4 mounting with 35 mm² cathode copper area.
Can BZX58550-B5V1-Q be used in place of a 5.1 V TL431 shunt regulator?
No - the BZX58550-B5V1-Q is a passive two-terminal Zener diode requiring external current limiting, whereas the TL431 is an active three-terminal adjustable shunt regulator with internal reference and amplifier. They differ fundamentally in topology, accuracy, temperature drift, and application circuitry.
Does the marking code '5E' correspond exclusively to BZX58550-B5V1-Q?
Yes - per Table 4 of the datasheet, the marking code '5E' is assigned solely to BZX58550-B5V1-Q within the BZX58550-Q series, distinguishing it from C-series variants (e.g., C5V1-Q uses '1Y') and other voltage grades.
Is the cathode terminal electrically isolated from the package body in SOD523?
Yes - the SOD523 package uses molded plastic encapsulation with no internal thermal pad or metal tab; the cathode (Pin 1) connects only to the die's cathode metallization and is fully insulated from the external package surface, enabling standard reflow soldering without thermal via constraints.
BZX58550-B5V1-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):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 270 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-B5V1-QX FAQ
1.How can I place an order for BZX58550-B5V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B5V1-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-B5V1-QX reliable?
The price and inventory of BZX58550-B5V1-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-B5V1-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B5V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B5V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B5V1-QX?
BZX58550-B5V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B5V1-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-B5V1-QX?
For technical support, including BZX58550-B5V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B5V1-QX requirements.
6.How does Aetrix verify that BZX58550-B5V1-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B5V1-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-B5V1-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B5V1-QX?
All BZX58550-B5V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B5V1-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-B5V1-QX part is unused and in its original packaging.
Return procedure for BZX58550-B5V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B5V1-QX Tags
-
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
Diodes Incorporated
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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
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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