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Nexperia USA Inc. BZX58550-B15-QX
- Part No.:
- BZX58550-B15-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B15-QX.pdf
- Description:
- DIODE ZENER 15V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,040
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Product details
Overview
BZX58550-B15-QX from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing precise 15 V regulation at 50 µA test current with ±2 % tolerance, 200 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX58550-B15-QX datasheet, BZX58550-B15-QX pinout, BZX58550-B15-QX application, or BZX58550-B15-QX equivalent, this page delivers verified electrical characteristics, thermal behavior, automotive-grade reliability data, and real-world implementation guidance for low-bias regulation in space-constrained systems.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable reverse breakdown at nominal 15.0 V (14.7–15.3 V range) under 50 µA test current. Its differential resistance is ≤200 Ω at 5 mA, and temperature coefficient is +9.2 mV/K - enabling predictable drift compensation in ambient ranges from −55 °C to +150 °C.
Designed for ultra-low bias operation, it features intentional leakage optimization per AN90031 for fast switching and noise reduction. The SOD523 package delivers minimal thermal resistance (350 K/W on 35 mm² cathode copper), supporting reliable performance in portable and automotive electronics where board area and thermal mass are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 15.0 V (min 14.7 V, max 15.3 V at IZ = 50 µA); enables accurate low-power rail stabilization in sensor interfaces and microcontroller reset circuits. |
| Tolerance | ±2 % (B-series); ensures tight voltage control without post-manufacturing trimming in production-grade automotive modules. |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper; supports continuous operation in thermally limited environments like ECUs and body controllers. |
| Forward Voltage | ≤0.9 V at IF = 10 mA; minimizes conduction loss when used bidirectionally or in clamping configurations. |
| Reverse Leakage | ≤0.05 µA at VR = 11.4 V; critical for battery-powered systems where standby current must remain below 100 nA. |
| Junction Temperature | Rated up to 150 °C; validated for under-hood automotive applications including engine control and lighting modules. |
| AEC-Q101 Qualified | Stress-tested per Automotive Electronics Council standard; confirms suitability for safety-relevant non-safety-critical automotive subsystems. |
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; requires thermal copper pour for power handling. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms shunt path during reverse breakdown to clamp voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables stable reference generation in micropower systems (e.g., coin-cell IoT sensors) where bias current must be minimized. |
| Optimized leakage profile | Intentional minor rise in leakage per AN90031 - reduces switching transients and high-frequency noise in ADC reference and clock buffer circuits. |
| Automotive qualification | AEC-Q101 compliant - qualified for temperature cycling, humidity, mechanical shock, and ESD per automotive stress standards. |
| Ultra-compact footprint | SOD523 package occupies <0.96 mm² PCB area - ideal for dense layouts in ADAS camera modules and compact telematics units. |
| Thermal robustness | Rth(j-a) = 350 K/W with 35 mm² cathode copper - allows sustained 150 mW dissipation at +85 °C ambient in engine bay applications. |
Applications
| Automotive Body Control Module | Portable Medical Sensor Node |
|---|---|
Use Scenario: Regulating 15 V supply for LIN transceiver bias and microcontroller I/O protection in door module ECUs. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable rail for analog front-end and communication ICs. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure functional consistency across vehicle life cycles without recalibration. |
Use Scenario: Generating precision reference for 16-bit biomedical ADC in wearable ECG patch powered by CR2032 battery. IC Role / Device Role / Timing Role: Low-current Zener reference establishing stable 15 V analog supply for signal conditioning circuitry. Use Value: 50 µA test current and <0.05 µA leakage at 75 % of VZ extend battery life beyond 18 months in continuous monitoring mode. |
| Industrial PLC Input Conditioning | Smart Home Smoke Detector |
Use Scenario: Clamping and regulating 15 V auxiliary rail for optocoupler isolation drivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Overvoltage protection and voltage stabilization element in input stage power management. Use Value: 200 mW power rating and 150 °C junction rating support operation in unventilated enclosures up to +70 °C ambient. |
Use Scenario: Providing stable 15 V bias for electrochemical CO sensor amplifier and MCU wake-up circuit in battery-operated smoke alarms. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining reference integrity during periodic self-test pulses. Use Value: Optimized leakage behavior per AN90031 suppresses false alarms triggered by transient noise coupling into analog sensing path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C15-Q | ±5 % tolerance (vs. ±2 %), higher leakage (0.05 µA vs. same), identical package and thermal specs | Suitable for non-critical biasing where cost sensitivity outweighs voltage accuracy requirements | Select when budget constraints dominate and 15.0 ±0.75 V regulation suffices for system margin. |
| MMSZ5245B-7-F | Same 15 V nominal, ±5 % tolerance, SOD-123 package (2.7 × 1.6 mm), 500 mW Ptot, no AEC-Q101 qualification | Higher power handling but larger footprint; not validated for automotive temperature or reliability stress | Choose only for industrial or consumer designs requiring >300 mW dissipation and no automotive compliance. |
Compared with BZX58550-C15-Q, the BZX58550-B15-QX offers tighter regulation for precision analog stages; versus MMSZ5245B-7-F, it trades power headroom for automotive qualification and 40 % smaller PCB area - making it optimal for space- and reliability-critical automotive edge nodes.
Availability
BZX58550-B15-QX is available at Aetrix Electronics and suitable for automotive body control modules, portable medical sensor nodes, industrial PLC input conditioning, and smart home smoke detectors requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-B15-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 diode portfolio, engineered specifically for low-current, high-stability voltage regulation in space-constrained automotive and portable electronics.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-B15-QX at 85 °C ambient?
At 85 °C ambient, the derated power dissipation is 210 mW, calculated using the 350 K/W thermal resistance (Rth(j-a)) and 150 °C maximum junction temperature: P = (Tj(max) − Tamb) / Rth(j-a) = (150 − 85) / 350 ≈ 0.186 W. The datasheet specifies 270 mW at 25 °C and 210 mW at 85 °C for FR4 with 35 mm² cathode copper.
Does BZX58550-B15-QX support bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-biased regulation. While forward conduction occurs below 0.9 V, its structure lacks symmetric clamping capability. For bidirectional ESD protection, Nexperia recommends dedicated TVS arrays such as PESD5V0S1BA.
How does the "intentional minor rise of leakage current" improve performance?
Per Application Note AN90031, this controlled leakage enhancement reduces minority-carrier storage time and suppresses high-frequency ringing during turn-off, lowering broadband noise in sensitive analog circuits like ADC references and oscillator bias networks.
Can BZX58550-B15-QX replace BZX84-C15 in existing designs?
No - BZX84-C15 uses SOT-23 package (3.0 × 1.4 mm), has ±5 % tolerance, and is not AEC-Q101 qualified. Direct replacement would require PCB redesign due to 75 % smaller footprint and different thermal layout; electrical substitution is possible only after validating thermal margin and leakage impact on system accuracy.
BZX58550-B15-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):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 270 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-B15-QX FAQ
1.How can I place an order for BZX58550-B15-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B15-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-B15-QX reliable?
The price and inventory of BZX58550-B15-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-B15-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B15-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B15-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B15-QX?
BZX58550-B15-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B15-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-B15-QX?
For technical support, including BZX58550-B15-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B15-QX requirements.
6.How does Aetrix verify that BZX58550-B15-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B15-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-B15-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B15-QX?
All BZX58550-B15-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B15-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-B15-QX part is unused and in its original packaging.
Return procedure for BZX58550-B15-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B15-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
-
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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