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Nexperia USA Inc. BZX58550-B47-QX
- Part No.:
- BZX58550-B47-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B47-QX.pdf
- Description:
- DIODE ZENER 47V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,166
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Product details
Overview
BZX58550-B47-Q 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 47 V regulation at 50 µA test current, with ±2 % tolerance, 300 mW total power dissipation, and qualified AEC-Q101 automotive reliability.
For engineers reviewing the BZX58550-B47-Q datasheet, BZX58550-B47-Q pinout, BZX58550-B47-Q application, or BZX58550-B47-Q equivalent, this page provides verified electrical parameters, thermal behavior, automotive qualification status, and real-world use context for low-power voltage stabilization in portable and automotive electronics.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 46.1 V to 47.9 V at IZ = 50 µA, exhibiting a temperature coefficient of +0.05 mV/K and differential resistance of 375 Ω at IZ = 0.5 mA. Its low test current enables ultra-low quiescent current design.
The device features intentional leakage optimization per AN90031 for fast switching and noise reduction, and achieves thermal resistance of 350 K/W (junction-to-ambient, 35 mm² cathode copper area), supporting stable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 47 V (min 46.1 V, max 47.9 V at IZ = 50 µA - defines precise reference point for low-bias circuits) |
| Tolerance | ±2 % (tight regulation window enabling accurate voltage clamping without trimming) |
| Power Dissipation | 300 mW (at Tamb ≤ 25 °C with 35 mm² cathode Cu area - sets maximum continuous bias power) |
| Forward Voltage | 0.9 V (at IF = 10 mA - ensures low-loss conduction in forward protection paths) |
| Reverse Current | ≤ 0.05 µA (at VR = 32.9 V - guarantees minimal leakage below regulation threshold) |
| Diode Capacitance | 40 pF (at VR = 0 V, f = 1 MHz - supports high-frequency noise filtering in signal rails) |
| Junction Temperature | 150 °C (maximum operating limit - enables under-hood automotive deployment) |
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 marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal - reverse-biased during Zener operation |
| 2 (A) | Anode | Connected to ground or lower-potential rail - completes bias path for controlled breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables microamp-level biasing in energy-sensitive IoT sensors and wearables |
| AEC-Q101 qualification | Qualified for automotive applications - meets stress-test requirements for under-hood and infotainment subsystems |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching transients and improves EMI performance in digital supply rails |
| Ultra-compact footprint | SOD523 (1.2 × 0.8 mm) - saves PCB area in multi-rail portable devices where board space is premium |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Voltage reference for analog front-end of tire pressure monitoring system (TPMS) sensor ICs. IC Role / Device Role / Timing Role: Zener reference stabilizes ADC reference rail against battery voltage drift during cold cranking. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure measurement integrity across −40 °C to +125 °C ambient range. |
Use Scenario: Bias voltage source for low-power pulse oximeter LED driver circuitry. IC Role / Device Role / Timing Role: Provides stable 47 V gate bias for discrete MOSFET switch controlling high-intensity LED pulses. Use Value: 50 µA test current minimizes standby current draw, extending single-cell coin battery life beyond 12 months. |
| Industrial PLC Input Modules | Smart Meter Power Supply Monitoring |
Use Scenario: Overvoltage clamp on 24 V DC input protection stage of programmable logic controller I/O channel. IC Role / Device Role / Timing Role: Fast-acting Zener shunt absorbs transient surges while maintaining low leakage below trip threshold. Use Value: 40 pF capacitance and optimized leakage reduce signal distortion on high-speed digital input lines. |
Use Scenario: Reference voltage generator for AC mains voltage sensing circuit in residential smart electricity meters. IC Role / Device Role / Timing Role: Supplies precise 47 V reference to isolated sigma-delta ADC measuring line voltage via resistive divider. Use Value: +0.05 mV/K tempco ensures <±0.5 % full-scale error over meter's 0–60 °C operating range. |
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-C47-Q | ±5 % tolerance (vs. ±2 %), same 47 V nominal, higher leakage at low VR | Acceptable where cost sensitivity outweighs precision; not recommended for metrology-grade references | Select only if budget constraints dominate and 5 % regulation error is acceptable in final system margin |
| MMSZ5270B-7-F | 47 V nominal, ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, non-AEC-Q101 | Larger footprint, higher power, no automotive qualification - suitable for industrial bench equipment only | Choose when higher surge robustness is needed and automotive compliance is unnecessary |
Compared with BZX58550-C47-Q and MMSZ5270B-7-F, the BZX58550-B47-Q uniquely combines tight ±2 % tolerance, AEC-Q101 qualification, and ultra-miniature SOD523 packaging - making it the sole option for space-limited, safety-critical automotive voltage references requiring long-term stability.
Availability
BZX58550-B47-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial PLC input modules, and smart meter power supply monitoring requiring stable component supply across extended temperature ranges and lifecycle continuity.
Supply support for BZX58550-B47-Q 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, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX58550-Q series belongs to Nexperia's automotive-qualified Zener regulator portfolio, engineered specifically for low-current, high-stability voltage reference and clamping in space-constrained, battery-operated, and harsh-environment applications.
FAQ
What is the maximum reverse voltage before breakdown for BZX58550-B47-Q?
The BZX58550-B47-Q begins regulating at a minimum Zener voltage of 46.1 V (at IZ = 50 µA) and reaches full regulation by 47.9 V. Below 46.1 V, reverse current remains ≤ 0.05 µA - confirming sharp knee behavior and effective clamping onset within its specified 47 V band.
Can BZX58550-B47-Q be used in place of a 47 V Zener with higher power rating?
No - its 300 mW power dissipation limit (at 25 °C with defined PCB copper area) restricts continuous current to ~6.4 mA at 47 V. Substituting into higher-power designs risks thermal runaway. Use only where load current and ambient conditions stay within its derated Ptot envelope.
Is the cathode marking bar polarity consistent across all SOD523 Zeners from Nexperia?
Yes - per datasheet Figure 9 and Table 2, Pin 1 (K) is always the cathode and is marked by a visible bar on the device body. This polarity alignment is standardized across the entire BZX58550-Q series and matches JEDEC SC-79 conventions.
Does the "B" suffix in BZX58550-B47-Q indicate tighter tolerance than "C" variants?
Yes - "B" denotes ±2 % tolerance (46.1–47.9 V), while "C" indicates approximately ±5 % (44.0–50.0 V). Both share identical package, thermal specs, and AEC-Q101 qualification, but only "B" grade meets precision reference requirements.
BZX58550-B47-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):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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-B47-QX FAQ
1.How can I place an order for BZX58550-B47-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B47-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-B47-QX reliable?
The price and inventory of BZX58550-B47-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-B47-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B47-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B47-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B47-QX?
BZX58550-B47-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B47-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-B47-QX?
For technical support, including BZX58550-B47-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B47-QX requirements.
6.How does Aetrix verify that BZX58550-B47-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B47-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-B47-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B47-QX?
All BZX58550-B47-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B47-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-B47-QX part is unused and in its original packaging.
Return procedure for BZX58550-B47-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B47-QX Tags
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MM5Z5V1ST1G
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