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onsemi SZBZX84C3V0LT1G
- Part No.:
- SZBZX84C3V0LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C3V0LT1G.pdf
- Description:
- DIODE ZENER 3V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,450
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Product details
Overview
SZBZX84C3V0LT1G from onsemi is a 3.0 V ±0.2 V Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board at 25°C, with 95 Ω dynamic impedance at 5 mA test current and −3.5 mV/°C temperature coefficient - used for voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZBZX84C3V0LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±6.7%), low leakage (≤10 µA @ 1 V), ESD robustness (>16 kV HBM), and automotive-grade AEC-Q101 qualification.
Technical Context
This device operates as a two-terminal voltage reference diode with reverse-biased Zener breakdown at 3.0 V nominal. Its thermal resistance is 500 °C/W junction-to-ambient on FR-5 board, and it maintains stable regulation across −65°C to +150°C junction temperature range.
The SOT-23 package features cathode-indicated polarity band, Pb-free construction, UL 94 V-0 flammability rating, and is qualified per AEC-Q101 for automotive applications. Pin 2 is internally unconnected - only pins 1 (anode) and 3 (cathode) are electrically active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.8–3.2 V @ 5 mA - tight 3.0 V nominal with ±0.2 V tolerance ensures stable reference in low-voltage bias networks. |
| Power Dissipation | 250 mW on FR-5 board @ 25°C - defines maximum continuous DC power handling before thermal derating begins. |
| Zener Impedance (ZZT) | 95 Ω @ 5 mA - indicates voltage regulation stiffness; lower values improve load regulation under varying current. |
| Reverse Leakage Current | ≤10 µA @ 1 V - ensures minimal parasitic current draw in standby or high-impedance sensing circuits. |
| Temperature Coefficient | −3.5 mV/°C @ 5 mA - negative TC enables predictable drift compensation when paired with positive-TC components. |
| Capacitance | 450 pF @ 0 V, 1 MHz - relevant for noise filtering and high-frequency bypass applications near regulated nodes. |
| ESD Rating | Class 3 (>16 kV HBM) - supports robust handling in automated assembly and end-use environments with electrostatic risk. |
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 identified by polarity band. Maximum soldering temperature: 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries forward current during transient overvoltage events. |
| 2 | No Connection | Internally unconnected terminal - no electrical function; must remain floating on PCB layout. |
| 3 | Cathode | Connected to higher-potential node; defines Zener breakdown voltage relative to anode; marked with polarity band. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and infotainment power supplies. |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements without compromising thermal or electrical performance. |
| Low Zener Impedance | 95 Ω at 5 mA enables precise voltage clamping in feedback loops of LDOs and DC-DC converters. |
| High ESD Robustness | Class 3 HBM (>16 kV) eliminates need for external ESD protection in space-constrained portable designs. |
| Small-Signal Regulation | Optimized for ≤20 mA operation - suitable for biasing, reference generation, and signal-level voltage limiting. |
Applications
| USB Port Overvoltage Protection | Microcontroller I/O Clamp |
|---|---|
Use Scenario: Protects 3.3 V USB data lines from ESD transients and accidental 5 V misconnection. IC Role / Device Role / Timing Role: Shunt clamp diode placed between D+ line and ground, conducting above 3.2 V to limit voltage excursion. Use Value: Prevents latch-up in USB transceivers using its 3.0 V Zener threshold and 16 kV HBM rating. |
Use Scenario: Safeguards GPIO pins of ARM Cortex-M microcontrollers against overvoltage during hot-plug or debug interface faults. IC Role / Device Role / Timing Role: Bidirectional clamp referenced to VDD, with cathode tied to 3.3 V rail and anode to I/O pin. Use Value: Limits pin voltage to ≤3.2 V while drawing <10 µA leakage, preserving low-power sleep modes. |
| Low-Power Sensor Biasing | Automotive Cabin Controller Reference |
Use Scenario: Provides stable 3.0 V reference for analog output sensors (e.g., temperature or pressure ICs) in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Passive voltage reference source in high-impedance divider network feeding ADC input. Use Value: Delivers <±1% regulation error over −40°C to +85°C due to known TC and low ZZT. |
Use Scenario: Supplies precision bias to op-amps and comparators in HVAC control modules operating across extended temperature ranges. IC Role / Device Role / Timing Role: AEC-Q101-qualified Zener reference replacing larger TO-92 parts in space-limited dashboard PCBs. Use Value: Enables full automotive qualification without redesign, leveraging same SOT-23 footprint and thermal profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C3V0LT1G | Same Zener voltage (3.0 V), identical SOT-23 package, but not AEC-Q101 qualified; tighter production lot control absent. | Restricted to commercial-grade consumer electronics; unsuitable for automotive or industrial safety-critical systems. | Select when cost sensitivity outweighs automotive qualification requirements and lifecycle traceability is not mandated. |
| SZBZX84C3V3LT1G | Higher nominal Zener voltage (3.3 V), same tolerance (±0.2 V), identical package and qualification level. | Used where system margin requires 3.3 V clamping instead of 3.0 V - e.g., 3.3 V logic rail protection with headroom. | Choose when design requires 3.3 V threshold with identical reliability, thermal, and ESD specs as SZBZX84C3V0LT1G. |
Compared with BZX84C3V0LT1G, SZBZX84C3V0LT1G adds AEC-Q101 qualification and PPAP capability for automotive use, while SZBZX84C3V3LT1G shifts regulation point upward by 0.3 V without altering package, thermal, or reliability attributes.
Availability
SZBZX84C3V0LT1G is available at Aetrix Electronics and suitable for USB port protection, microcontroller I/O clamping, and low-power sensor biasing requiring stable component supply, automotive qualification, and high-volume tape-and-reel delivery.
Supply support for SZBZX84C3V0LT1G 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.
SZBZX84C3V0LT1G belongs to the SZBZX84CxxxLT1G series - engineered for automotive-grade voltage regulation in space-constrained, high-reliability systems where AEC-Q101 compliance and thermal stability are mandatory.
FAQ
What is the Zener voltage tolerance of SZBZX84C3V0LT1G?
The SZBZX84C3V0LT1G has a nominal Zener voltage of 3.0 V with a guaranteed range of 2.8 V to 3.2 V at 5 mA test current - representing ±6.7% tolerance. This specification is validated per onsemi's BZX84CxxxLT1 series datasheet Rev. 23, page 3, and applies directly to the SZBZX84C3V0LT1G variant.
Is SZBZX84C3V0LT1G suitable for automotive applications?
Yes, SZBZX84C3V0LT1G is AEC-Q101 qualified and PPAP capable, explicitly designated for automotive and other applications requiring unique site and control change requirements. Its qualification covers temperature cycling, humidity testing, and mechanical stress validation per the standard.
What is the maximum power dissipation of SZBZX84C3V0LT1G on FR-5 board?
SZBZX84C3V0LT1G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient temperature. Above 25°C, it derates linearly at 2.0 mW/°C, reaching zero dissipation at 150°C ambient - consistent with the Maximum Ratings table on page 2 of the datasheet.
Does SZBZX84C3V0LT1G have a connected pin 2?
No, pin 2 of SZBZX84C3V0LT1G is internally unconnected (NC). The device uses only pins 1 (anode) and 3 (cathode) for electrical operation. This is confirmed in the Electrical Characteristics table (page 3) and Mechanical Case Outline (page 7), which specify "Pinout: 1-Anode, 2-No Connection, 3-Cathode".
What is the ESD rating of SZBZX84C3V0LT1G?
SZBZX84C3V0LT1G has an ESD rating of Class 3 per Human Body Model (>16 kV), as stated in the Features section (page 1) of the datasheet. This rating is verified through standardized HBM testing and supports robust handling in manufacturing and field deployment.
SZBZX84C3V0LT1G 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):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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)
SZBZX84C3V0LT1G FAQ
1.How can I place an order for SZBZX84C3V0LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C3V0LT1G 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 SZBZX84C3V0LT1G reliable?
The price and inventory of SZBZX84C3V0LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C3V0LT1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C3V0LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C3V0LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C3V0LT1G?
SZBZX84C3V0LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C3V0LT1G 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 SZBZX84C3V0LT1G?
For technical support, including SZBZX84C3V0LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C3V0LT1G requirements.
6.How does Aetrix verify that SZBZX84C3V0LT1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C3V0LT1G 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 SZBZX84C3V0LT1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C3V0LT1G?
All SZBZX84C3V0LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C3V0LT1G, 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 SZBZX84C3V0LT1G part is unused and in its original packaging.
Return procedure for SZBZX84C3V0LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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