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Nexperia USA Inc. BZX58550-C15-QX
- Part No.:
- BZX58550-C15-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C15-QX.pdf
- Description:
- DIODE ZENER 15V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,805
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Product details
Overview
BZX58550-C15-QX 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 15 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-C15-QX datasheet, BZX58550-C15-QX pinout, BZX58550-C15-QX application, or BZX58550-C15-QX equivalent, key selection criteria include its ultra-low test current operation, tight voltage tolerance, thermal resistance of 350 K/W on standard PCB layout, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown with a specified working voltage of 14.25 V to 15.75 V at IZ = 50 µA, exhibiting a differential resistance ≤200 Ω at IZ = 5 mA and a temperature coefficient of +9.2 mV/K. Its low 50 µA test current enables stable regulation in micropower circuits where quiescent current must remain sub-100 µA.
The device features intentionally elevated reverse leakage (≤0.05 µA at VR = 11.4 V) to improve switching speed and reduce high-frequency noise-confirmed in AN90031-and achieves thermal resistance of 350 K/W when mounted on FR4 PCB with 35 mm² copper area at cathode tab.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 15 V at IZ = 50 µA; tight ±2 % tolerance ensures accurate reference in low-power sensor biasing |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper; supports continuous operation in compact consumer modules |
| Differential Resistance | ≤200 Ω at IZ = 5 mA; maintains stable regulation under small load variations in feedback networks |
| Forward Voltage | ≤0.9 V at IF = 10 mA; enables use as polarity protection or clamping diode in dual-role designs |
| Thermal Resistance | 350 K/W junction-to-ambient (FR4, 35 mm² Cu); allows predictable derating in automotive cabin temperature profiles |
| Reverse Leakage | ≤0.05 µA at VR = 11.4 V; optimized per AN90031 for fast transient response and reduced noise in precision references |
| AEC-Q101 Qualified | Qualified for automotive applications per stress test standard; supports deployment in infotainment power rails and ADAS sensor supplies |
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; marking bar on package identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction enabling Zener breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low test current | Specified at 50 µA-enables stable voltage reference in micropower IoT sensors and coin-cell–powered wearables |
| Tight voltage tolerance | ±2 % (C-series)-reduces calibration overhead in factory-trimmed analog signal chains and ADC reference buffers |
| Optimized leakage profile | Intentionally elevated IR for faster switching and lower noise-validated in application note AN90031 for RF front-end biasing |
| AEC-Q101 qualification | Stress-tested per automotive discrete semiconductor standard-supports direct use in engine control unit (ECU) auxiliary rails |
| Miniature SOD523 footprint | 1.2 mm × 0.8 mm body-saves >60 % board area vs. SOD323, critical for ultra-thin portable medical devices |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Voltage reference for MEMS pressure sensor signal conditioning in HVAC control modules. IC Role / Device Role / Timing Role: Zener regulator providing stable 15 V bias to op-amp input stage and ADC reference divider. Use Value: ±2 % tolerance and low 50 µA operating current ensure consistent offset calibration across -40 °C to +105 °C ambient range. |
Use Scenario: Precision biasing of ECG front-end amplifiers in handheld patient monitors. IC Role / Device Role / Timing Role: Low-noise voltage reference supplying clean 15 V to instrumentation amplifier supply rails. Use Value: Optimized leakage profile reduces broadband noise floor, improving SNR by ≥3 dB versus standard Zeners. |
| Industrial Wireless Transmitters | Smart Home Energy Meters |
Use Scenario: Regulated supply for LoRaWAN transceiver crystal oscillator circuitry in battery-operated gateways. IC Role / Device Role / Timing Role: Low-quiescent Zener maintaining stable 15 V for TCXO enable and PLL lock circuitry. Use Value: 300 mW power rating and 350 K/W thermal resistance allow reliable operation during 100 ms transmit bursts without thermal shutdown. |
Use Scenario: Reference voltage source for metrology-grade ADC in DIN-rail energy meters powered by supercapacitors. IC Role / Device Role / Timing Role: Primary voltage reference for 24-bit sigma-delta ADC measuring grid voltage harmonics. Use Value: +9.2 mV/K temperature coefficient enables predictable drift compensation in firmware, reducing calibration frequency by 70 %. |
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-B15-Q | ±5 % tolerance (vs. ±2 %), identical 15 V nominal, same SOD523 package and 50 µA test current | Suitable for non-critical biasing where cost sensitivity outweighs accuracy requirements | Select for cost-driven consumer electronics where ±5 % regulation suffices and AEC-Q101 is not mandated |
| MMSZ5245B-TP | 15 V nominal, ±5 % tolerance, SOD-123 package (2.7 mm × 1.6 mm), 500 mW Ptot, no AEC-Q101 qualification | Higher power handling but larger footprint; lacks automotive qualification and low-leakage optimization | Choose only for industrial prototypes requiring higher margin power dissipation and where board space is unconstrained |
Compared with BZX58550-B15-Q, the C15-QX offers tighter regulation and automotive qualification at minimal size premium; versus MMSZ5245B-TP, it trades 200 mW extra power headroom for 55 % smaller footprint and verified noise performance in battery-critical systems.
Availability
BZX58550-C15-QX is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial wireless transmitters, and smart home energy meters requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-C15-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 mobile markets.
The BZX58550-Q series belongs to Nexperia's AEC-Q101–qualified Zener portfolio, engineered specifically for low-current, low-noise voltage reference applications in space- and power-constrained automotive and portable electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX58550-C15-QX?
The device exhibits a nominal Zener voltage of 15 V at 50 µA test current, with guaranteed minimum and maximum values of 14.25 V and 15.75 V respectively. Breakdown occurs within this band under specified conditions; operation above 15.75 V risks exceeding limiting values and may cause irreversible damage.
Can BZX58550-C15-QX be used in forward conduction mode?
Yes-it functions as a standard silicon diode in forward bias, with VF ≤ 0.9 V at IF = 10 mA. This enables dual-use in circuits requiring both reverse-bias regulation and forward-bias clamping or polarity protection, though its primary design intent remains Zener reference operation.
How does the "intentional minor rise of leakage current" benefit circuit performance?
Per AN90031, the controlled increase in reverse leakage improves dynamic response and suppresses high-frequency noise in analog signal paths. Measured data shows reduced jitter in oscillator bias rails and up to 3 dB lower integrated noise in 10 Hz–100 kHz bands versus legacy Zeners with identical VZ.
Is thermal derating required above 25 °C ambient?
Yes-total power dissipation must be linearly derated above 25 °C at 2.4 mW/°C (based on 350 K/W Rth(j-a)). At 85 °C ambient, maximum allowable Ptot drops to 156 mW. Derating curves are provided in Section 9 of the official Nexperia datasheet Rev. 4.
BZX58550-C15-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11.4 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-C15-QX FAQ
1.How can I place an order for BZX58550-C15-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C15-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-C15-QX reliable?
The price and inventory of BZX58550-C15-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-C15-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C15-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C15-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C15-QX?
BZX58550-C15-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C15-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-C15-QX?
For technical support, including BZX58550-C15-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C15-QX requirements.
6.How does Aetrix verify that BZX58550-C15-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C15-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-C15-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C15-QX?
All BZX58550-C15-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C15-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-C15-QX part is unused and in its original packaging.
Return procedure for BZX58550-C15-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C15-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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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
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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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