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onsemi SZBZX84C47LT3
- Part No.:
- SZBZX84C47LT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C47LT3.pdf
- Description:
- DIODE ZENER 47V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
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Product details
Overview
SZBZX84C47LT3 from onsemi is a 47 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 170 Ω dynamic impedance at 5 mA test current and 90 nA reverse leakage at 35.3 V, used for precision voltage regulation in portable power rails and reference circuits.
For engineers reviewing the SZBZX84C47LT3 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), Pb-free compliance, and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for stable reverse-biased breakdown regulation. Its Zener voltage is specified at three test currents (2 mA, 5 mA, 20 mA), enabling consistent performance across varying load conditions in biasing and clamping functions.
The temperature coefficient of +0.2 mV/°C at 47 V ensures minimal drift over −65°C to +150°C junction range, while 40 pF capacitance at 0 V bias supports low-noise signal path applications. It meets AEC-Q101 qualification for automotive-grade reliability and Class 3 ESD immunity per HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44 V to 50 V at 5 mA - defines regulated output voltage window under standard test condition |
| Power Dissipation | 225 mW on FR-5 board - sets maximum continuous power handling without derating |
| Zener Impedance (ZZT) | 170 Ω at 5 mA - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage Current | 90 nA at 35.3 V - indicates low standby power loss in high-impedance bias networks |
| Temperature Coefficient | +0.2 mV/°C - quantifies voltage drift per degree Celsius near nominal VZ |
| Capacitance | 40 pF at 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| ESD Rating | Class 3 (>16 kV) HBM - ensures robustness during automated PCB assembly and field handling |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting construction, corrosion-resistant finish, UL 94 V-0 flammability rating, 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; forms current entry point during Zener conduction |
| 2 | No Connection | Internally unconnected lead; must remain floating-no PCB trace or pad should tie to this terminal |
| 3 | Cathode | Connected to higher-potential node; polarity band on package identifies this terminal for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating on FR-5 Board | Enables compact voltage reference design without heatsinking in space-constrained portable electronics |
| ±5% Zener Voltage Tolerance | Supports predictable regulation accuracy for non-critical analog references and overvoltage protection thresholds |
| AEC-Q101 Qualified | Validates suitability for automotive body electronics, infotainment power supplies, and under-hood sensor interfaces |
| Pb-Free SOT-23 Package | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements |
| ESD Rating >16 kV (HBM) | Eliminates need for external ESD protection in handheld device front-end circuits |
Applications
| Portable Device Power Rail Clamping | Microcontroller Reset Voltage Reference |
|---|---|
Use Scenario: Clamping transient spikes on 5 V USB-powered rail in Bluetooth earbuds during hot-plug events. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing surge energy above 47 V threshold to protect downstream LDOs and PMICs. Use Value: Prevents latch-up in 1.8 V logic cores by limiting rail excursion to safe margin below absolute maximum ratings. | Use Scenario: Providing stable reset threshold for ARM Cortex-M0+ MCU in smart thermostat during brown-out detection. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in discrete reset circuit with hysteresis. Use Value: Ensures deterministic reset assertion at 47 V ±5%, independent of supply ripple or temperature variation. |
| Automotive Sensor Bias Network | Industrial Analog Signal Conditioning |
Use Scenario: Generating stable 47 V bias for piezoresistive pressure sensor bridge excitation in engine control module. IC Role / Device Role / Timing Role: Low-drift Zener source replacing resistor-divider + capacitor filter in high-temp sensor interface. Use Value: Maintains <±1% full-scale error over −40°C to +125°C ambient due to +0.2 mV/°C TC and AEC-Q101 qualification. | Use Scenario: Protecting ADC input stage from overvoltage in 4–20 mA loop receiver with 24 V supply. IC Role / Device Role / Timing Role: Clamp diode limiting transient common-mode voltage to prevent ADC saturation or damage. Use Value: Limits fault voltage to 47 V before breakdown, preserving 16-bit measurement integrity during EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C47LT3 | No "SZ" prefix; not AEC-Q101 qualified; same electrical specs and SOT-23 package | Targeted at commercial-grade consumer electronics, not automotive systems | Select when AEC-Q101 compliance is unnecessary and cost sensitivity outweighs qualification requirements |
| SZBZX84C47LT3G | Pb-free variant with identical Zener characteristics, thermal specs, and AEC-Q101 qualification | Required where RoHS-compliant assembly and automotive PPAP documentation are mandatory | Choose for new automotive designs requiring documented Pb-free sourcing and full PPAP support |
Compared with SZBZX84C47LT3, BZX84C47LT3 lacks automotive qualification but matches all electrical parameters, while SZBZX84C47LT3G adds Pb-free compliance without altering regulation behavior-making the original part optimal for cost-sensitive AEC-Q101 applications where leaded assembly remains acceptable.
Availability
SZBZX84C47LT3 is available at Aetrix Electronics and suitable for portable electronics, automotive sensor modules, and industrial analog signal conditioning requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for SZBZX84C47LT3 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
SZBZX84C47LT3 belongs to the BZX84CxxxLT1 series of Zener regulators, engineered for space-constrained voltage reference and overvoltage protection in high-density portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of SZBZX84C47LT3?
The SZBZX84C47LT3 has a nominal Zener voltage of 47 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 44 V and 50 V when tested at 5 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official datasheet and applies specifically to the SZBZX84C47LT3 variant within the C-series standard-tolerance family.
Is SZBZX84C47LT3 AEC-Q101 qualified?
Yes, SZBZX84C47LT3 is explicitly AEC-Q101 qualified and PPAP capable, as stated in the Features section of the datasheet. This qualification validates its reliability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces-distinguishing it from non-SZ-prefix variants like BZX84C47LT3.
What is the pin configuration of SZBZX84C47LT3?
SZBZX84C47LT3 uses a 3-pin SOT-23 package with pinout: Pin 1 = Anode, Pin 2 = No Connection (must remain unconnected), Pin 3 = Cathode (identified by polarity band). This configuration is documented in the Marking Diagram and Electrical Characteristics sections of the datasheet and verified across all BZX84CxxxLT1 series devices.
What is the maximum power dissipation of SZBZX84C47LT3 on FR-5 board?
The maximum power dissipation of SZBZX84C47LT3 on FR-5 board is 225 mW at 25°C ambient temperature, derating linearly by 1.8 mW/°C above that temperature. This rating is specified in the Maximum Ratings table and reflects thermal performance on standard 1.0 × 0.75 × 0.62 inch FR-5 substrate.
Does SZBZX84C47LT3 have Pb-free packaging?
No-SZBZX84C47LT3 is not Pb-free; it uses standard leaded termination. The Pb-free version is designated SZBZX84C47LT3G (with "G" suffix), which shares identical electrical and thermal specifications but complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow standards.
SZBZX84C47LT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±6%
- Power - Max:
- 225 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:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZBZX84C47LT3 FAQ
1.How can I place an order for SZBZX84C47LT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C47LT3 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 SZBZX84C47LT3 reliable?
The price and inventory of SZBZX84C47LT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C47LT3 is usually 5 days.
3.What payment methods are accepted for SZBZX84C47LT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C47LT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C47LT3?
SZBZX84C47LT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C47LT3 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 SZBZX84C47LT3?
For technical support, including SZBZX84C47LT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C47LT3 requirements.
6.How does Aetrix verify that SZBZX84C47LT3 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C47LT3 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 SZBZX84C47LT3 meets industry standards.
7.What is the process for return or replacement of SZBZX84C47LT3?
All SZBZX84C47LT3 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C47LT3, 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 SZBZX84C47LT3 part is unused and in its original packaging.
Return procedure for SZBZX84C47LT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C47LT3 Tags
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