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onsemi SZBZX84C5V1LT1G
- Part No.:
- SZBZX84C5V1LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C5V1LT1G.pdf
- Description:
- DIODE ZENER 5.1V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,680
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Product details
Overview
SZBZX84C5V1LT1G from onsemi is a 5.1 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 60 Ω dynamic impedance at 5 mA test current and −2.7 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZBZX84C5V1LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener tolerance (±5%), thermal coefficient, leakage current (2 µA @ 3 V), junction capacitance (225 pF), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage regulator with cathode-anode polarity, designed for reverse-bias breakdown regulation. Its 5.1 V nominal Zener voltage is specified at 5 mA test current (IZT), with tight thermal stability (−2.7 mV/°C) and low leakage (≤2 µA at VR = 3 V).
The SOT-23 package supports automated placement and reflow soldering per JEDEC J-STD-020, with maximum solder temperature of 260°C for 10 seconds. It features Class 3 ESD rating (>16 kV HBM) and Pb-free, RoHS-compliant construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 5.1 V nominal, 4.8–5.4 V range at 5 mA - defines stable regulation point for 5 V rail clamping or reference generation |
| Power Dissipation | 250 mW on FR-5 board - sets maximum continuous power handling without derating below 25°C |
| Zener Impedance | 60 Ω max at 5 mA - determines output voltage variation under load current changes |
| Temperature Coefficient | −2.7 mV/°C - quantifies voltage drift with ambient temperature, critical for stable references across −65°C to +150°C |
| Reverse Leakage | ≤2 µA at VR = 3 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Junction Capacitance | 225 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and transient response in decoupling applications |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling in manual assembly and field-replaceable modules |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation; carries forward current when used as clamp |
| 2 | No Connection | Internally unconnected; electrically isolated; no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node; source of regulated voltage; marked with polarity band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control units and ADAS power domains |
| Pb-Free & RoHS Compliant | Meets global environmental regulations and lead-free reflow process compatibility |
| 250 mW Power Rating | Enables compact voltage clamping in space-constrained portable electronics without heatsinking |
| Class 3 ESD Protection | Eliminates need for external ESD diodes in handheld and wearable interface circuits |
| Tight Thermal Coefficient | −2.7 mV/°C enables <±1% regulation stability over −40°C to +85°C industrial range |
Applications
| USB Power Rail Protection | Automotive Sensor Reference |
|---|---|
Use Scenario: Clamping 5 V USB VBUS against surges in portable accessories. IC Role / Device Role / Timing Role: Two-terminal Zener shunt regulator absorbing transient energy above 5.4 V. Use Value: Prevents damage to downstream USB PHY ICs while maintaining <100 ns response time due to low junction capacitance (225 pF). |
Use Scenario: Providing stable 5.1 V reference for analog sensor signal conditioning in engine bay modules. IC Role / Device Role / Timing Role: Precision voltage reference with AEC-Q101 qualification and −2.7 mV/°C TC. Use Value: Ensures <±1.5% reference accuracy across −40°C to +125°C operating range without active compensation. |
| Low-Power IoT Node Bias | Industrial PLC Input Protection |
Use Scenario: Generating clean 5 V bias for ultra-low-power microcontrollers in battery-operated sensors. IC Role / Device Role / Timing Role: Low-leakage (≤2 µA @ 3 V) Zener reference enabling multi-year battery life. Use Value: Delivers stable regulation with <2 µA quiescent current, minimizing drain on coin-cell or Li-SOCl₂ sources. |
Use Scenario: Protecting 24 V digital input channels from ESD and overvoltage transients in factory automation controllers. IC Role / Device Role / Timing Role: Front-end shunt clamp limiting input voltage to safe logic levels. Use Value: Withstands >16 kV HBM ESD events and clamps transients within 10 ns, preserving FPGA or MCU GPIO integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C5V1LT1G | Same electrical specs but lacks AEC-Q101 qualification and SZ-prefix automotive traceability | Approved for commercial/industrial use only; not suitable for automotive production | Select when automotive qualification is unnecessary and cost sensitivity is high |
| SZBZX84C5V1LT3G | Identical Zener parameters and AEC-Q101 rating, but supplied in 10,000-piece tape-and-reel vs. 3,000-piece | Optimized for high-volume automated assembly; same thermal and electrical behavior | Select for large-scale manufacturing where reel size and logistics efficiency matter |
Compared with SZBZX84C5V1LT1G, BZX84C5V1LT1G offers identical regulation performance but excludes automotive qualification and controlled change management, while SZBZX84C5V1LT3G provides identical functionality in larger packaging for volume production - choice depends on compliance requirements and procurement scale.
Availability
SZBZX84C5V1LT1G is available at Aetrix Electronics and suitable for USB power protection, automotive sensor reference, low-power IoT biasing, and industrial PLC input protection requiring stable component supply and long-term lifecycle support.
Supply support for SZBZX84C5V1LT1G 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZBZX84C5V1LT1G belongs to the SZBZX84CxxxLT1G series of AEC-Q101-qualified Zener regulators, engineered for reliable voltage reference and overvoltage protection in harsh automotive and industrial environments.
FAQ
What is the Zener voltage tolerance of SZBZX84C5V1LT1G?
The SZBZX84C5V1LT1G has a nominal Zener voltage of 5.1 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 4.8 V and 5.4 V when tested at 5 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet, under the BZX84CxxxLT1 series section.
Is SZBZX84C5V1LT1G qualified for automotive applications?
Yes, SZBZX84C5V1LT1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Features section of the datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, making it suitable for use in engine control units, body electronics, and ADAS subsystems.
What is the maximum power dissipation for SZBZX84C5V1LT1G on an FR-5 board?
SZBZX84C5V1LT1G is rated for 250 mW total power dissipation on FR-5 board at TA = 25°C, with derating of 2.0 mW/°C above that temperature. This value is specified in the Maximum Ratings table on page 2 of the official onsemi datasheet and applies directly to standard PCB layouts without copper heatsinking.
Does SZBZX84C5V1LT1G have a no-connect pin, and how is it configured?
Yes, SZBZX84C5V1LT1G uses the SOT-23 package with pin configuration Style 8: Pin 1 is Anode, Pin 2 is No Connection (internally unconnected), and Pin 3 is Cathode. This is documented in the Marking Diagram on page 3 and the Mechanical Case Outline on page 7 of the datasheet.
What is the junction capacitance of SZBZX84C5V1LT1G and at what condition is it measured?
The junction capacitance of SZBZX84C5V1LT1G is 225 pF, measured at VR = 0 V and f = 1 MHz, as listed in the Electrical Characteristics table on page 3. This parameter directly affects high-frequency transient suppression performance and must be considered in RF-sensitive or fast-switching applications.
SZBZX84C5V1LT1G 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):
- 5.1 V
- Tolerance:
- ±6%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 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)
SZBZX84C5V1LT1G FAQ
1.How can I place an order for SZBZX84C5V1LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C5V1LT1G 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 SZBZX84C5V1LT1G reliable?
The price and inventory of SZBZX84C5V1LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C5V1LT1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C5V1LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C5V1LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C5V1LT1G?
SZBZX84C5V1LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C5V1LT1G 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 SZBZX84C5V1LT1G?
For technical support, including SZBZX84C5V1LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C5V1LT1G requirements.
6.How does Aetrix verify that SZBZX84C5V1LT1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C5V1LT1G 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 SZBZX84C5V1LT1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C5V1LT1G?
All SZBZX84C5V1LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C5V1LT1G, 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 SZBZX84C5V1LT1G part is unused and in its original packaging.
Return procedure for SZBZX84C5V1LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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