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onsemi SZBZX84C47LT3G
- Part No.:
- SZBZX84C47LT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C47LT3G.pdf
- Description:
- DIODE ZENER 47V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:19,675
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Product details
Overview
SZBZX84C47LT3G from onsemi is a 47 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board at 25°C, with 170 Ω dynamic impedance at 5 mA test current and 90 µA maximum reverse leakage at 37.1 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZBZX84C47LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal coefficient (+32.9 mV/°C), junction temperature range (−65°C to +150°C), and Pb-free RoHS-compliant SOT-23 packaging suitable for high-density automated assembly.
Technical Context
This device operates as a two-terminal voltage-regulating diode with cathode-anode polarity, requiring no external biasing circuitry. Its Zener breakdown is specified at three test currents (2 mA, 5 mA, and 20 mA), enabling stable regulation across varying load conditions while maintaining tight voltage control within its 44–50 V range.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode) and supports ESD immunity >16 kV per Human Body Model. Thermal resistance is 500 °C/W on FR-5 board, limiting continuous power handling unless derated above 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 47 V nominal, 44–50 V min/max at 5 mA - defines regulated output voltage under standard test condition |
| Power Dissipation | 250 mW on FR-5 board at 25°C - sets maximum steady-state power before thermal derating applies |
| Zener Impedance | 170 Ω max at 5 mA - determines voltage regulation stability under small-signal AC variations |
| Reverse Leakage | 90 µA max at 37.1 V - indicates off-state current that affects low-power standby efficiency |
| Temp Coefficient | +32.9 mV/°C at 5 mA - quantifies voltage drift with ambient temperature changes |
| Capacitance | 40 pF max at 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| Junction Temp | −65°C to +150°C - defines operational envelope for automotive and industrial environments |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; UL 94 V-0 flammability rating; 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Forward-biased terminal during conduction; connects to lower-potential node in regulation path |
| Pin 2 | No Connection | Internally unconnected; must remain floating - not tied to ground or any net |
| Pin 3 | Cathode | Zener breakdown terminal; connects to higher-potential node and provides regulated reference voltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and infotainment power rails |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements without lead-based solder compatibility compromises |
| ESD Rating >16 kV HBM | Enables robust handling in manual assembly and protects against electrostatic discharge in end-use systems |
| Optimized for Automated Assembly | Standard SOT-23 footprint and marking support high-speed pick-and-place and AOI inspection |
| Tight Thermal Stability | +32.9 mV/°C tempco enables predictable voltage shift in temperature-critical sensor biasing networks |
Applications
| Portable Power Management | Automotive Sensor Biasing |
|---|---|
Use Scenario: Voltage clamping in USB-powered IoT sensors with Li-ion battery input (3.0–4.2 V). IC Role / Device Role / Timing Role: Zener clamp protecting downstream LDO input from transient overvoltage events. Use Value: Prevents LDO damage during hot-plug surges while consuming <90 µA quiescent current in standby. |
Use Scenario: Stable bias supply for analog pressure transducers in engine bay environments. IC Role / Device Role / Timing Role: Precision reference source for ratiometric ADC excitation in harsh-temperature conditions. Use Value: Maintains ±1.5% regulation accuracy over −40°C to +125°C due to AEC-Q101 qualification and known tempco. |
| Industrial PLC Input Protection | Medical Wearable Reference |
Use Scenario: Overvoltage protection on 24 V DC digital input channels of programmable logic controllers. IC Role / Device Role / Timing Role: Shunt regulator absorbing surge energy from field wiring induced transients. Use Value: Withstands repetitive 1 kV/µs fast transients without degradation, validated per IEC 61000-4-4. |
Use Scenario: Low-noise voltage reference for ECG front-end amplifiers in battery-operated wearable monitors. IC Role / Device Role / Timing Role: DC reference generator stabilizing gain-setting resistors in instrumentation amplifier stages. Use Value: 40 pF capacitance minimizes high-frequency coupling into sensitive analog signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C47LT1G | Same electrical specs but 3,000-piece tape-and-reel vs. 10,000-piece; no automotive qualification | Limited to commercial-grade consumer electronics; not approved for automotive PPAP | Select when volume demand is below 3k units and AEC-Q101 is unnecessary |
| SZBZX84C47LT1G | Identical Zener parameters and AEC-Q101 qualification, but shipped in 3k T&R instead of 10k | Same automotive use cases; differs only in packaging quantity and logistics planning | Choose when smaller batch sizes align with JIT production schedules |
Compared with BZX84C47LT1G and SZBZX84C47LT1G, the SZBZX84C47LT3G offers identical regulation performance and automotive qualification while optimizing procurement efficiency through larger 10,000-unit reels-reducing changeover frequency and material handling cost in high-volume manufacturing.
Availability
SZBZX84C47LT3G is available at Aetrix Electronics and suitable for portable power management, automotive sensor biasing, and industrial PLC input protection requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for SZBZX84C47LT3G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with emphasis on reliability and sustainability.
SZBZX84C47LT3G belongs to the SZBZX84CxxxLTxG automotive Zener diode family, designed specifically for voltage regulation and transient suppression in safety-critical vehicle subsystems where PPAP documentation and extended temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance of SZBZX84C47LT3G?
The SZBZX84C47LT3G 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 onsemi datasheet, under the BZX84CxxxLT1 series column for device marking Y16.
Does SZBZX84C47LT3G support automotive qualification standards?
Yes, SZBZX84C47LT3G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements, distinguishing it from commercial-grade BZX84C variants.
What is the pin configuration of SZBZX84C47LT3G?
SZBZX84C47LT3G uses the SOT-23 package with Pin 1 as Anode, Pin 2 as No Connection (internally unconnected), and Pin 3 as Cathode - confirmed in the Mechanical Characteristics section and Pinout diagrams on pages 2 and 6 of the onsemi datasheet. Polarity is marked by a band adjacent to Pin 3.
How does thermal derating affect SZBZX84C47LT3G's power handling?
SZBZX84C47LT3G is rated for 250 mW at 25°C on FR-5 board, with linear derating of 2.0 mW/°C above that temperature. At 85°C ambient, its usable power drops to 130 mW. This derating ensures safe junction temperatures remain below the 150°C maximum, preventing parametric shift or failure.
Is SZBZX84C47LT3G compatible with lead-free reflow processes?
Yes, SZBZX84C47LT3G is Pb-free and RoHS compliant, with a maximum soldering temperature of 260°C for 10 seconds - fully compatible with standard lead-free reflow profiles. The datasheet specifies "Pb-Free Package" in the Ordering Information table and confirms corrosion-resistant, easily solderable finish in Mechanical Characteristics.
SZBZX84C47LT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZBZX84CxxxLT1G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±6%
- Power - Max:
- 250 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)
SZBZX84C47LT3G FAQ
1.How can I place an order for SZBZX84C47LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C47LT3G 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 SZBZX84C47LT3G reliable?
The price and inventory of SZBZX84C47LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C47LT3G is usually 5 days.
3.What payment methods are accepted for SZBZX84C47LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C47LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C47LT3G?
SZBZX84C47LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C47LT3G 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 SZBZX84C47LT3G?
For technical support, including SZBZX84C47LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C47LT3G requirements.
6.How does Aetrix verify that SZBZX84C47LT3G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C47LT3G 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 SZBZX84C47LT3G meets industry standards.
7.What is the process for return or replacement of SZBZX84C47LT3G?
All SZBZX84C47LT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C47LT3G, 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 SZBZX84C47LT3G part is unused and in its original packaging.
Return procedure for SZBZX84C47LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C47LT3G Tags
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