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Nexperia USA Inc. BZX58550-C16-QX
- Part No.:
- BZX58550-C16-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C16-QX.pdf
- Description:
- DIODE ZENER 16V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
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Product details
Overview
BZX58550-C16-QX from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, rated for 16 V nominal working voltage 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-C16-QX datasheet, BZX58550-C16-QX pinout, BZX58550-C16-QX application, or BZX58550-C16-QX equivalent, this device serves as a precision low-bias voltage reference in portable battery-powered systems, ECU sensor biasing, and automotive infotainment power rail stabilization where space-constrained SMD placement and low leakage are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 16 V at IZ = 50 µA, exhibiting a differential resistance of 200 Ω at IZ = 5 mA and a temperature coefficient of +10.4 mV/K. Its low test current enables stable regulation under micro-power conditions.
The device features intentional minor leakage current optimization per AN90031 to improve switching speed and reduce noise in sensitive analog front-ends. It is qualified to AEC-Q101 and rated for operation from −55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.2 V to 16.8 V at IZ = 50 µA - tight ±2 % tolerance ensures predictable clamping in low-current bias networks |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables reliable forward conduction for polarity protection or dual-mode circuitry |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper - defines safe continuous operating envelope in compact layouts |
| Differential Resistance (rdiff) | 200 Ω max at IZ = 5 mA - quantifies voltage regulation stiffness under small-signal load variations |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 12.1 V - ultra-low leakage preserves battery life in always-on automotive subsystems |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports under-hood deployment without derating in engine control modules |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling per AEC stress test requirements |
Pinout & Package
SOD523 (SC-79) plastic surface-mounted package: 2-pin, 1.2 mm × 0.8 mm × 0.6 mm body, ultra-small footprint optimized for high-density PCBs. Cathode identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; carries reverse breakdown current; marked side on package |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at IZ = 50 µA - enables stable voltage reference in µA-level standby circuits |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching transients and broadband noise in sensor signal chains |
| AEC-Q101 qualification | Qualified for automotive applications - meets stress test requirements for HTGB, HTRB, and mechanical shock |
| Ultra-compact SOD523 package | 1.2 mm × 0.8 mm footprint - saves >60 % board area vs. SOD323 while maintaining thermal performance |
| Tight voltage tolerance | ±2 % (C-series) - eliminates need for post-assembly trimming in precision bias networks |
Applications
| Automotive ECU Sensor Biasing | Portable Medical Device Reference |
|---|---|
Use Scenario: Providing stable 16 V bias to Hall-effect position sensors in engine control units under wide ambient temperature swings. IC Role / Device Role / Timing Role: Zener voltage reference diode regulating sensor excitation voltage independent of supply rail fluctuations. Use Value: Maintains sensor accuracy across −40 °C to +125 °C ambient with <±0.5 % drift due to +10.4 mV/K tempco and AEC-Q101 reliability. |
Use Scenario: Supplying precise 16 V reference for analog front-end amplifiers in handheld glucose meters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current Zener regulator establishing fixed reference for ADC input scaling. Use Value: Draws only 50 µA test current, extending single CR2032 battery life beyond 2 years in intermittent-use mode. |
| Infotainment System Power Rail Clamp | Industrial IoT Node Voltage Supervisor |
Use Scenario: Clamping 16 V auxiliary rail against transient overvoltage in automotive head unit power management. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as overvoltage protection element on 12 V–16 V distributed supply line. Use Value: Withstands non-repetitive 40 W surge (100 µs) and limits clamping voltage to ≤17.5 V at 100 mA surge current. |
Use Scenario: Monitoring 16 V backup battery voltage in smart meter communication modules to trigger low-battery alerts. IC Role / Device Role / Timing Role: Precision Zener used in comparator-based undervoltage detection circuit. Use Value: ±2 % tolerance ensures alert threshold remains within ±0.32 V of nominal, minimizing false triggers in field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B16-Q | ±5 % tolerance (vs. ±2 %), higher rdiff (400 Ω), same VZ range and AEC-Q101 qualification | Acceptable where cost sensitivity outweighs precision; less suitable for sensor bias requiring tight VZ stability | Select when budget constraints dominate and ±5 % regulation error is acceptable in target circuit |
| MMSZ5245B-TP | Same 16 V nominal, ±5 % tolerance, SOD-123 package (2.7 mm × 1.4 mm), 500 mW Ptot, no AEC-Q101 rating | Larger footprint, higher power handling, but unqualified for automotive use; limited to industrial/commercial designs | Choose only for non-automotive applications needing higher power margin and where board space permits larger package |
Compared with BZX58550-B16-Q and MMSZ5245B-TP, the BZX58550-C16-QX uniquely combines AEC-Q101 qualification, ±2 % tolerance, and ultra-compact SOD523 packaging-making it the sole option for space-constrained, high-precision automotive voltage references.
Availability
BZX58550-C16-QX is available at Aetrix Electronics and suitable for automotive ECU design, portable medical instrumentation, infotainment system protection, and industrial IoT node supervision requiring stable component supply across extended product lifecycles.
Supply support for BZX58550-C16-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 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 AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage regulation in automotive and portable electronics where miniaturization and long-term reliability are mandatory.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX58550-C16-QX has a nominal Zener voltage of 16 V, with guaranteed breakdown occurring between 15.2 V and 16.8 V at 50 µA test current. Its absolute maximum reverse voltage is not defined-operation above VZ must remain within the specified IZ range to avoid thermal runaway or parametric shift.
Can this diode be used in forward-biased configuration?
Yes-the device exhibits ≤0.9 V forward voltage at 10 mA, making it suitable for polarity protection or dual-function circuits. However, its primary design intent and characterization are for reverse-bias Zener regulation; forward conduction capability is secondary and not optimized for high-current switching.
How does the "C" suffix differ from "B" in the BZX58550-Q series?
The "C" suffix denotes ±2 % Zener voltage tolerance and optimized leakage behavior per AN90031 for fast switching and noise reduction. The "B" suffix indicates ±5 % tolerance and standard leakage characteristics-both share identical package, power rating, and AEC-Q101 qualification.
Is thermal derating required when mounted on standard FR4 without enhanced copper?
Yes-when mounted on standard FR4 with minimal copper (single-sided, tin-plated), the thermal resistance rises to 460 K/W. At 25 °C ambient, maximum allowable power drops to ~270 mW (per Table 5), requiring current derating below 50 µA if ambient exceeds 85 °C to maintain Tj ≤ 150 °C.
BZX58550-C16-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):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.1 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-C16-QX FAQ
1.How can I place an order for BZX58550-C16-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C16-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-C16-QX reliable?
The price and inventory of BZX58550-C16-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-C16-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C16-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C16-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C16-QX?
BZX58550-C16-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C16-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-C16-QX?
For technical support, including BZX58550-C16-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C16-QX requirements.
6.How does Aetrix verify that BZX58550-C16-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C16-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-C16-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C16-QX?
All BZX58550-C16-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C16-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-C16-QX part is unused and in its original packaging.
Return procedure for BZX58550-C16-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C16-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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