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Nexperia USA Inc. BZX58550-B10-QX
- Part No.:
- BZX58550-B10-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B10-QX.pdf
- Description:
- DIODE ZENER 10V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,626
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Product details
Overview
BZX58550-B10-QX from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 10 V nominal 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-B10-QX datasheet, BZX58550-B10-QX pinout, BZX58550-B10-QX application, or BZX58550-B10-QX equivalent, this page delivers verified electrical characteristics, thermal behavior, cathode/anode terminal mapping, and automotive-grade reliability context - all critical for low-bias power rail stabilization in space-constrained designs.
Technical Context
This device operates as a precision shunt regulator, maintaining stable 10 V output across load variations using reverse-biased Zener breakdown. Its specified test current of 50 µA enables ultra-low quiescent current operation ideal for battery-backed circuits and always-on monitoring nodes.
It exhibits a temperature coefficient of +4.5 mV/K and differential resistance of ≤150 Ω at 5 mA, ensuring predictable voltage drift and minimal dynamic impedance under transient loads. The intentional minor leakage rise (per AN90031) supports fast switching response and reduced noise in signal conditioning paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 10 V at IZ = 50 µA - defines precise regulation point for low-power bias networks |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper - sets maximum continuous DC load capability |
| Forward Voltage | ≤0.9 V at IF = 10 mA - confirms low-loss conduction during polarity-reversal protection or clamping |
| Reverse Current | ≤0.1 µA at VR = 7.6 V - guarantees minimal standby leakage in high-impedance sensing rails |
| Differential Resistance | ≤150 Ω at IZ = 5 mA - limits output voltage variation under small-signal load transients |
| Thermal Resistance | 350 K/W junction-to-ambient (with 35 mm² cathode Cu) - determines steady-state temperature rise under rated power |
Pinout & Package
Package: SOD523 (SC-79), ultra-small surface-mount plastic package measuring 1.2 mm × 0.8 mm × 0.6 mm, with flat leads and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; marked by bar on package; carries reverse current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in microamp-level bias circuits without loading sensitive sources |
| AEC-Q101 qualification | Qualified for automotive applications - assures reliability under extended temperature (-55 °C to +150 °C) and mechanical stress |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves switching speed and reduces broadband noise in feedback loops |
| Ultra-compact footprint | SOD523 package (1.2 × 0.8 mm) - saves board area in wearables, sensor modules, and multi-rail PMIC support circuits |
| Stable temperature coefficient | +4.5 mV/K - enables predictable VZ drift compensation in temperature-critical references |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 10 V reference for LIN bus transceiver biasing and microcontroller reset supervision in door module electronics. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing accurate supply rail for analog comparators and voltage monitors. Use Value: Enables reliable wake-up detection and fault reporting under cold-crank (6 V) and load-dump (40 V) conditions due to AEC-Q101 rating and low 50 µA test current. |
Use Scenario: Stabilizing excitation voltage for strain-gauge bridges in pressure transmitters operating from 3.3 V LDOs. IC Role / Device Role / Timing Role: Precision Zener reference source for ratiometric ADC front-end calibration. Use Value: Delivers ±2 % VZ accuracy and <150 Ω dynamic impedance to maintain bridge excitation stability across -40 °C to +125 °C ambient range. |
| Portable Medical Pulse Oximeter | Smart Home Smoke Detector MCU Bias |
Use Scenario: Generating clean 10 V bias for photodiode transimpedance amplifier in battery-powered pulse oximetry frontend. IC Role / Device Role / Timing Role: Low-leakage shunt regulator minimizing standby current draw while maintaining ADC reference integrity. Use Value: Achieves ≤0.1 µA reverse current at 7.6 V and 300 mW power budget - extends coin-cell lifetime beyond 2 years in intermittent-read mode. |
Use Scenario: Supplying regulated 10 V to CO sensor heater driver IC in lithium-thionyl chloride–powered smoke alarms. IC Role / Device Role / Timing Role: Stable voltage clamp enabling consistent heater temperature control despite battery voltage decay from 3.6 V to 2.0 V. Use Value: Maintains ±2 % regulation over full life cycle due to low 50 µA test current and robust thermal resistance (350 K/W), preventing false alarms from heater under-voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C10-Q | ±5 % tolerance vs. ±2 %; identical 10 V nominal, package, and AEC-Q101 qualification | Acceptable where cost sensitivity outweighs precision requirement; higher IR at low VR | Select when tighter regulation is unnecessary and BOM cost reduction is prioritized |
| MMSZ5240B-7-F | Same 10 V nominal but ±5 % tolerance; SOD-123 package (2.7 × 1.4 mm); 500 mW Ptot; no AEC-Q101 rating | Higher power handling but larger footprint and non-automotive qualified | Choose only for non-automotive industrial use requiring >300 mW dissipation |
Compared with BZX58550-C10-Q, this part offers tighter voltage accuracy and lower leakage at low bias; versus MMSZ5240B-7-F, it provides automotive qualification and 45 % smaller board area at the cost of 300 mW max power - making it optimal for space- and reliability-critical automotive and portable designs.
Availability
BZX58550-B10-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal chains, portable medical devices, and smart home safety systems requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-B10-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 focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for low-current, high-stability voltage reference and biasing in space-constrained automotive and portable electronics.
FAQ
What is the maximum continuous reverse voltage this diode can regulate at 10 V?
The BZX58550-B10-QX is rated for nominal 10 V Zener voltage at 50 µA test current, with a guaranteed working range of 9.50 V to 10.50 V (±2 %). Its absolute maximum reverse voltage is limited by the 300 mW power dissipation rating - at 10 V, this corresponds to 30 mA maximum continuous Zener current under 25 °C ambient with adequate PCB copper area.
Does this part support reflow soldering, and what footprint is required?
Yes, BZX58550-B10-QX is qualified for lead-free reflow soldering per J-STD-020. The recommended footprint matches the SOD523 (SC-79) outline: 1.2 mm × 0.8 mm pad pitch, with 0.5 mm solder land width and 0.6 mm solder paste stencil opening per terminal, as defined in Figure 10 of the official datasheet.
How does its AEC-Q101 qualification impact design validation?
AEC-Q101 qualification confirms that BZX58550-B10-QX has passed stress tests including HTGB, HTRB, TCT, and ESD (HBM ≥2 kV), enabling direct use in automotive electronic control units without additional component-level qualification. It supports operation from −55 °C to +150 °C junction temperature, meeting ISO 16750 environmental requirements.
Can this Zener be used in forward-biased configuration?
Yes - its forward voltage is specified ≤0.9 V at 10 mA, making it suitable for low-drop clamping or polarity protection. However, its primary design intent and characterization are for reverse-biased Zener regulation; forward conduction should be limited to ≤200 mA peak per absolute maximum ratings to avoid thermal runaway or bond wire failure.
BZX58550-B10-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):
- 10 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 7.6 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-B10-QX FAQ
1.How can I place an order for BZX58550-B10-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B10-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-B10-QX reliable?
The price and inventory of BZX58550-B10-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-B10-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B10-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B10-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B10-QX?
BZX58550-B10-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B10-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-B10-QX?
For technical support, including BZX58550-B10-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B10-QX requirements.
6.How does Aetrix verify that BZX58550-B10-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B10-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-B10-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B10-QX?
All BZX58550-B10-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B10-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-B10-QX part is unused and in its original packaging.
Return procedure for BZX58550-B10-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B10-QX Tags
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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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onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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