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Nexperia USA Inc. BZX58550-B15X
- Part No.:
- BZX58550-B15X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B15X.pdf
- Description:
- DIODE ZENER 15V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,148
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Product details
Overview
BZX58550-B15X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 15 V regulation at 50 µA test current, with ±2 % tolerance, 200 mW total power dissipation at 25 °C ambient, and 11.4 Ω differential resistance at 5 mA, enabling stable operation in portable battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX58550-B15X datasheet, BZX58550-B15X pinout, BZX58550-B15X application, or BZX58550-B15X equivalent, this page provides verified electrical characteristics, thermal behavior under PCB mounting conditions, cathode/anode terminal mapping, and real-world use cases in low-quiescent-current regulation systems.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable reverse breakdown voltage across its anode–cathode terminals when biased above its specified Zener voltage. Its 15 V nominal working voltage is characterized at IZ = 50 µA, with tight ±2 % tolerance and low temperature coefficient of +9.2 mV/K - critical for minimizing drift in temperature-sensitive analog references.
The BZX58550-B15X exhibits 11.4 Ω differential resistance at 5 mA, ensuring minimal output impedance during transient load changes, and features intentional leakage optimization per AN90031 to reduce switching noise in signal conditioning paths. Its 0.9 V forward voltage at 10 mA supports bidirectional clamping verification during circuit bring-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 15 V at IZ = 50 µA - defines precise reference point for low-bias voltage monitoring |
| Tolerance | ±2 % - ensures predictable regulation without post-production trimming |
| Differential Resistance | 11.4 Ω at IZ = 5 mA - limits output voltage variation under small-signal load shifts |
| Power Dissipation | 270 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - sets maximum continuous bias current limit |
| Forward Voltage | 0.9 V at IF = 10 mA - enables reliable forward conduction check during functional test |
| Reverse Current | 0.05 µA at VR = 11.4 V - confirms low leakage below knee voltage for standby power integrity |
| Thermal Resistance | 350 K/W junction-to-ambient (35 mm² Cu) - determines temperature rise under steady-state bias |
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 voltage node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or current-limiting resistor; reverse-biased configuration establishes Zener action |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables regulation in sub-100 µA supply rails common in IoT edge sensors |
| Optimized leakage profile | Intentional minor IR increase per AN90031 - reduces high-frequency noise in precision ADC reference buffers |
| Ultra-compact footprint | SOD523 package - saves >60 % board area vs. SOD323, critical for wearable and hearing aid PCBs |
| Stable temperature coefficient | +9.2 mV/K - minimizes drift over −40 °C to +85 °C ambient range in unheated enclosures |
| Controlled forward conduction | VF ≤ 0.9 V at 10 mA - allows bidirectional functional testing without external diode check circuitry |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
Use Scenario: Providing stable 15 V bias to MEMS pressure sensor amplifier in battery-operated environmental monitor. IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed headroom for op-amp rail-to-rail input stage. Use Value: Enables <1 µA quiescent current design while maintaining ±0.3 % reference accuracy across 0–40 °C operating range. |
Use Scenario: Generating clean 15 V threshold for external reset supervisor IC in ARM Cortex-M0+ system-on-module. IC Role / Device Role / Timing Role: Precision voltage source triggering reset assertion when main supply drops below safe logic level. Use Value: Eliminates need for external divider network, reducing BOM count and improving long-term threshold stability. |
| Low-Power Analog Front-End | USB-C Power Negotiation Reference |
Use Scenario: Supplying reference voltage to 12-bit SAR ADC in energy-harvesting wireless transmitter. IC Role / Device Role / Timing Role: Low-noise Zener element stabilizing ADC VREF input against battery voltage sag. Use Value: Achieves ENOB ≥ 11.2 bits at 1 kSPS with <−85 dB THD due to optimized leakage-induced noise reduction. |
Use Scenario: Supporting USB PD 3.0 variable voltage negotiation by providing accurate 15 V feedback point to CC controller. IC Role / Device Role / Timing Role: Calibration-grade voltage marker used during CC logic's VBUS validation sequence. Use Value: Meets USB-IF ±1 % VBUS tolerance requirement at 15 V PDO without trimming resistors or calibration firmware. |
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-C15 | ±5 % tolerance, higher leakage (0.05 µA vs. B-series), same 15 V nominal | Acceptable where cost sensitivity outweighs precision; less suitable for <1 ppm/°C drift-critical references | Select for cost-driven consumer wearables where ±5 % regulation meets system margin |
| MMSZ5245B | Same 15 V nominal but SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, ±5 % tolerance | Requires larger PCB area; better thermal performance but incompatible with ultra-dense layouts | Choose when higher power handling or legacy footprint compatibility is required over miniaturization |
Compared with BZX58550-C15 and MMSZ5245B, the BZX58550-B15X uniquely balances ±2 % tolerance, SOD523 size, and 50 µA test current - making it optimal for space-constrained, low-drift analog subsystems where both precision and miniaturization are non-negotiable.
Availability
BZX58550-B15X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, low-power analog front-end, and USB-C power negotiation reference requiring stable component supply with guaranteed long-term traceability.
Supply support for BZX58550-B15X 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, reliability, and miniaturization.
The BZX58550 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and regulation in battery-constrained and space-limited applications.
FAQ
What is the maximum continuous reverse current the BZX58550-B15X can sustain without degradation?
The device supports up to 200 mA forward current per absolute maximum ratings, but for Zener operation, the practical continuous reverse current is limited by power dissipation. At 25 °C ambient on FR4 with 35 mm² cathode copper, 270 mW rating permits ~18 mA average reverse current (270 mW ÷ 15 V). Exceeding this requires derating per thermal resistance curves in section 9.
How does the BZX58550-B15X differ from standard 1N4744A in terms of layout and thermal performance?
Unlike the through-hole 1N4744A (DO-41), the BZX58550-B15X uses SOD523 surface-mount packaging (1.2 × 0.8 mm), reducing board area by >90 %. Its thermal resistance is 350 K/W (vs. ~100 K/W for DO-41 on heatsink), but its 50 µA test current enables operation at <0.1 mW - making thermal mass irrelevant in typical use cases.
Can the BZX58550-B15X be used in series or parallel configurations for higher voltage or current capability?
Series connection is feasible for higher reference voltages (e.g., two BZX58550-B15X yield ~30 V), but mismatched temperature coefficients cause unequal voltage sharing. Parallel use is not recommended due to negative dynamic resistance interaction and potential thermal runaway - discrete current-limiting resistors per device are mandatory if attempted.
Is the BZX58550-B15X suitable for automotive applications per AEC-Q200?
No. The BZX58550-B15X is not AEC-Q200 qualified. Nexperia explicitly states in section 14 that non-automotive qualified products are unsuitable for safety-critical or life-support systems. For automotive use, consider the AEC-Q200 qualified BZX84-C15 or PZM15NB series instead.
BZX58550-B15X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX58550
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-B15X FAQ
1.How can I place an order for BZX58550-B15X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B15X 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-B15X reliable?
The price and inventory of BZX58550-B15X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B15X is usually 5 days.
3.What payment methods are accepted for BZX58550-B15X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B15X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B15X?
BZX58550-B15X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B15X 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-B15X?
For technical support, including BZX58550-B15X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B15X requirements.
6.How does Aetrix verify that BZX58550-B15X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B15X 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-B15X meets industry standards.
7.What is the process for return or replacement of BZX58550-B15X?
All BZX58550-B15X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B15X, 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-B15X part is unused and in its original packaging.
Return procedure for BZX58550-B15X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B15X 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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