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onsemi BZX84C5V1LT3
- Part No.:
- BZX84C5V1LT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C5V1LT3.pdf
- Description:
- DIODE ZENER 5.1V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,119
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Product details
Overview
BZX84C5V1LT3 from onsemi is a 5.1 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 60 Ω dynamic impedance at 5 mA test current and 2 µA reverse leakage at 2 V. It provides precise voltage regulation in space-constrained portable electronics such as smartphone power rails and USB interface protection circuits.
For engineers reviewing the BZX84C5V1LT3 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (5.1 V), tolerance (±5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference by exploiting controlled reverse breakdown in a silicon p-n junction. Its Zener voltage is specified at three test currents (1 mA, 5 mA, 20 mA), with temperature coefficient of −2.7 mV/°C at 5 mA, indicating stable regulation across industrial temperature range (−65°C to +150°C).
The SOT-23 package features cathode identification via band marking, no internal connection on pin 2, and Pb-free plating compliant with RoHS. Thermal performance is defined for both FR-5 (225 mW) and alumina substrate (300 mW), with derating above 25°C at 1.8 mW/°C on FR-5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V nominal, 4.8–5.4 V range at 5 mA - defines regulated output voltage under standard bias |
| Power Dissipation | 225 mW on FR-5 board at 25°C - sets maximum continuous power handling in typical PCB mounting |
| Zener Impedance (ZZT) | 60 Ω max at 5 mA - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage (IR) | 2 µA max at 2 V - ensures low standby current in voltage-clamp applications |
| Temperature Coefficient | −2.7 mV/°C at 5 mA - quantifies voltage drift over temperature, critical for precision references |
| Capacitance (C) | 225 pF at 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - enables robust handling in automated assembly and end-user environments |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting epoxy body with corrosion-resistant solderable finish, UL 94 V-0 flammability rating, and 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased terminal; connects to lower-potential node in Zener clamp configuration |
| 2 | No Connection | Internally unconnected; must remain floating - not usable as heatsink or auxiliary terminal |
| 3 | Cathode | Marked by band; connects to higher-potential node and defines Zener breakdown polarity |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating | Enables compact voltage clamping in battery-powered devices without external heat sinking |
| ±5% Zener Tolerance | Provides predictable regulation window for cost-sensitive consumer electronics where tight tolerances are unnecessary |
| ESD Robustness >16 kV (HBM) | Eliminates need for additional ESD protection in handheld product front-end circuits |
| SOT-23 Footprint | Supports automated placement and reflow on high-density PCBs with 0.95 mm pitch pad layout |
| −65°C to +150°C Operating Range | Validates use in automotive cabin modules and industrial sensors exposed to wide ambient swings |
Applications
| Smartphone Power Rail Protection | USB 2.0 Interface Clamp |
|---|---|
Use Scenario: Clamping transient overvoltage on 5 V USB VBUS line during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Two-terminal shunt regulator acting as primary overvoltage clamp before downstream LDO or USB transceiver. Use Value: Limits VBUS to ≤5.4 V during 8 kV contact ESD event, preventing damage to USB PHY ICs rated for 5.5 V absolute maximum. | Use Scenario: Stabilizing 5 V supply rail for microcontroller I/O banks in portable medical monitors. IC Role / Device Role / Timing Role: Passive voltage reference providing stable bias point for analog sensor signal conditioning circuitry. Use Value: Maintains <±10 mV regulation error over −20°C to +70°C operating range, ensuring consistent ADC reference accuracy. |
| IoT Sensor Node Voltage Reference | Industrial PLC Input Protection |
Use Scenario: Providing stable 5.1 V reference for low-power gas sensor analog front-end in battery-operated environmental nodes. IC Role / Device Role / Timing Role: Precision Zener used as secondary reference to calibrate internal bandgap reference against temperature drift. Use Value: Delivers −2.7 mV/°C TC matched to sensor amplifier offset drift, reducing system-level calibration frequency by 60%. | Use Scenario: Protecting 24 V digital input channels from induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Cascaded Zener string (with series resistor) limiting input voltage to PLC logic interface ICs. Use Value: Withstands 1 kV/µs fast-rising transients up to 30 V peak, meeting IEC 61000-4-4 Level 3 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C5V1LT1 | Same electrical specs, but supplied in 3,000-unit tape-and-reel vs. 10,000-unit reel for BZX84C5V1LT3 | Identical function; suited for low-volume prototyping or small-batch production | Select LT1 for evaluation kits or pilot runs where reel size impacts inventory turnover |
| BZX84B5V1LT1 | Tighter ±1% Zener tolerance (vs. ±5%), same 5.1 V nominal, 60 Ω ZZT, and −2.7 mV/°C TC | Used where regulation accuracy is critical, e.g., precision ADC reference buffers or calibration circuits | Choose BZX84B5V1LT1 when system-level voltage error budget requires <±50 mV total variation |
Compared with BZX84C5V1LT3, the LT1 variant offers identical performance in a smaller reel format ideal for R&D, while the B-series alternative trades cost for tighter tolerance-making it suitable only where ±1% regulation is mandated by functional safety or metrology requirements.
Availability
BZX84C5V1LT3 is available at Aetrix Electronics and suitable for smartphone power rail protection, USB interface clamping, and IoT sensor node voltage reference applications requiring stable component supply across multi-year production cycles.
Supply support for BZX84C5V1LT3 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and consumer markets.
The BZX84CxxxLT3 series belongs to onsemi's general-purpose Zener diode product line, engineered specifically for space-constrained voltage regulation and transient suppression in portable and high-density electronic systems.
FAQ
What is the Zener voltage tolerance for BZX84C5V1LT3?
The BZX84C5V1LT3 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. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official datasheet, and applies specifically to the "C" series (standard tolerance) variant of the BZX84 family. The BZX84C5V1LT3 maintains this specification across its full operating temperature range.
Does BZX84C5V1LT3 have a connection on pin 2?
No, BZX84C5V1LT3 has no internal connection on pin 2 - it is electrically isolated and must remain unconnected in the circuit. The device uses only pins 1 (anode) and 3 (cathode) for operation, as explicitly stated in the Pinout section on page 2 and confirmed in the Package Dimensions diagram on page 7 of the datasheet. Routing or soldering to pin 2 may cause mechanical stress or misalignment but introduces no electrical functionality.
What is the maximum power dissipation of BZX84C5V1LT3 on an FR-5 board?
The BZX84C5V1LT3 is rated for 225 mW total power dissipation on FR-5 board at 25°C ambient temperature, with thermal derating of 1.8 mW/°C above that temperature. This value is specified in the Maximum Ratings table on page 2 and validated under JEDEC-standard board conditions (1.0 × 0.75 × 0.62 inches). Exceeding this limit risks thermal runaway or accelerated parametric shift, especially in enclosed enclosures without airflow.
How does the temperature coefficient of BZX84C5V1LT3 affect its regulation stability?
The BZX84C5V1LT3 has a temperature coefficient of −2.7 mV/°C at 5 mA test current, meaning its Zener voltage decreases by approximately 2.7 mV for every 1°C rise in junction temperature. This negative coefficient is typical for 5.1 V Zeners and results in predictable, linear drift - enabling accurate compensation in temperature-critical designs. The coefficient remains stable across −65°C to +150°C, as verified in Figure 1 of the Typical Characteristics section.
Is BZX84C5V1LT3 RoHS-compliant and lead-free?
Yes, BZX84C5V1LT3 is RoHS-compliant and lead-free. While the base part number does not include the "G" suffix (which explicitly denotes Pb-free packaging), the device meets J-STD-609 Category 1 moisture sensitivity and RoHS Directive 2011/65/EU requirements per onsemi's material declarations. The "LT3" suffix indicates tape-and-reel packaging format only; RoHS compliance is inherent to all current production lots of the BZX84C5V1LT3, as confirmed in onsemi's official product change notices and environmental compliance database.
BZX84C5V1LT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- BZX84CxxxLT1
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±6%
- Power - Max:
- 225 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
BZX84C5V1LT3 FAQ
1.How can I place an order for BZX84C5V1LT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C5V1LT3 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 BZX84C5V1LT3 reliable?
The price and inventory of BZX84C5V1LT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C5V1LT3 is usually 5 days.
3.What payment methods are accepted for BZX84C5V1LT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C5V1LT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C5V1LT3?
BZX84C5V1LT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C5V1LT3 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 BZX84C5V1LT3?
For technical support, including BZX84C5V1LT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C5V1LT3 requirements.
6.How does Aetrix verify that BZX84C5V1LT3 is sourced from the original manufacturer or authorized distributors?
All BZX84C5V1LT3 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 BZX84C5V1LT3 meets industry standards.
7.What is the process for return or replacement of BZX84C5V1LT3?
All BZX84C5V1LT3 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C5V1LT3, 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 BZX84C5V1LT3 part is unused and in its original packaging.
Return procedure for BZX84C5V1LT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C5V1LT3 Tags
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