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onsemi BZX84C6V8LT3
- Part No.:
- BZX84C6V8LT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C6V8LT3.pdf
- Description:
- DIODE ZENER 6.8V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,895
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Product details
Overview
BZX84C6V8LT3 from onsemi is a 6.8 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 15 Ω dynamic impedance at 5 mA test current and 2 µA reverse leakage at 5 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the BZX84C6V8LT3 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (6.8 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 in reverse breakdown to maintain stable voltage across its cathode-anode terminals under varying load or input conditions. Its Zener voltage exhibits a +1.2 mV/°C temperature coefficient near 6.8 V, enabling predictable drift compensation in ambient-temperature-varying circuits.
The SOT-23 package features a no-connect terminal (Pin 2), allowing unambiguous anode (Pin 1) and cathode (Pin 3) identification. With 450 pF capacitance at 0 V bias and 1 MHz, it supports moderate-speed transient suppression without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 6.8 V nominal, 6.4–7.2 V range at 5 mA - defines clamping/reference level accuracy |
| Power Dissipation | 225 mW on FR-5 board at 25°C - sets maximum continuous power handling before thermal derating |
| Zener Impedance | 15 Ω at 5 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage | 2 µA at 5 V - ensures minimal standby current in voltage-sense or bias networks |
| Temperature Coefficient | +1.2 mV/°C at 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Capacitance | 155 pF at 0 V, 1 MHz - impacts high-frequency noise filtering and signal coupling behavior |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling in manual assembly and end-user environments |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting body with corrosion-resistant finish, UL 94 V-0 flammability rating, and 260°C soldering tolerance for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; forward conduction path when used as diode |
| 2 | No Connection | Internally unconnected; must remain floating - not usable as thermal pad or ground tie |
| 3 | Cathode | Connected to higher-potential node during Zener operation; polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Option Available | "G" suffix variants meet RoHS requirements without compromising electrical performance or reliability |
| Tight Thermal Resistance | 556 °C/W junction-to-ambient enables stable operation up to +150°C junction temperature with minimal board copper |
| High ESD Robustness | Class 3 Human Body Model (>16 kV) eliminates need for external ESD protection in many consumer interfaces |
| Optimized for Automated Assembly | Standardized SOT-23 footprint and marking support high-yield pick-and-place and AOI inspection |
| Low Capacitance Variant | 155 pF at 0 V allows use in 1–10 MHz signal path clamping without excessive loading |
Applications
| Smartphone Power Rail Clamp | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Clamping 5 V USB VBUS line against transient surges from hot-plug events or ESD. IC Role / Device Role / Timing Role: Standalone Zener clamp placed between VBUS and GND, conducting only during overvoltage excursions. Use Value: Limits peak voltage to ≤7.2 V using 6.8 V nominal breakdown, preventing damage to downstream USB PHY ICs rated for 6.5 V absolute max. | Use Scenario: Stabilizing reference voltage for ADC monitoring of battery charge state in Bluetooth earbuds. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 6.8 V to ADC voltage divider network. Use Value: ±5% tolerance and +1.2 mV/°C TC enable <±2% total error across −20°C to +70°C operating range, meeting battery gauge accuracy requirements. |
| IoT Sensor Node Voltage Reference | Industrial PLC Input Conditioning |
Use Scenario: Providing regulated bias voltage to MEMS pressure sensor analog front-end in LPWAN node. IC Role / Device Role / Timing Role: Low-power Zener reference sourcing <10 µA quiescent current while maintaining 6.8 V stability. Use Value: 2 µA leakage at 5 V ensures reference current draw remains below sensor's 50 µA sleep-mode budget, extending battery life. | Use Scenario: Protecting 24 V digital input circuitry from induced transients on factory floor wiring. IC Role / Device Role / Timing Role: Secondary clamp stage following TVS diode, absorbing residual energy below 100 V. Use Value: 225 mW rating and 15 Ω impedance allow sustained clamping of 15 mA transients for >100 µs without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C6V8LT1 | Same electrical specs, but shipped in 3,000-piece tape-and-reel vs. 10,000-piece reel for BZX84C6V8LT3 | Identical functional use; differs only in packaging quantity and reel size (7″ vs. 13″) | Select BZX84C6V8LT1 for prototyping or low-volume production; BZX84C6V8LT3 for high-volume automated assembly. |
| BZX84B6V8LT1 | Tighter ±2% tolerance (6.66–6.94 V), same 15 Ω Zz, +1.2 mV/°C TC, Pb-free option available | Used where tighter initial voltage accuracy is required, e.g., calibration-critical instrumentation references | Choose BZX84B6V8LT1 when ±2% tolerance is mandatory; BZX84C6V8LT3 suffices for general-purpose clamping or non-critical biasing. |
Compared with BZX84C6V8LT3, BZX84C6V8LT1 offers identical performance in a smaller reel format ideal for development, while BZX84B6V8LT1 delivers superior initial accuracy at the cost of higher unit price-making BZX84C6V8LT3 the optimal balance of cost, availability, and specification for high-volume consumer electronics.
Availability
BZX84C6V8LT3 is available at Aetrix Electronics and suitable for smartphone power rail clamp, USB port overvoltage protection, and IoT sensor node voltage reference applications requiring stable component supply, consistent SOT-23 form factor, and RoHS-compliant manufacturing.
Supply support for BZX84C6V8LT3 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, high-performance silicon solutions for automotive, industrial, cloud, medical, and edge applications.
The BZX84 series belongs to onsemi's discrete Zener regulator product line, engineered specifically for space-constrained, low-power voltage reference and transient suppression in portable and high-density electronics.
FAQ
What is the Zener voltage tolerance of BZX84C6V8LT3?
The BZX84C6V8LT3 has a nominal Zener voltage of 6.8 V with a tolerance of ±5%, meaning its actual breakdown voltage falls within 6.4 V to 7.2 V when tested at 5 mA. This tolerance is specified per the BZX84CxxxLT1 standard-tolerance series and is confirmed in the Electrical Characteristics table on page 3 of the official datasheet.
Does BZX84C6V8LT3 have a connection on Pin 2?
No, Pin 2 of the BZX84C6V8LT3 is internally unconnected (NC). The device uses only Pins 1 (Anode) and 3 (Cathode) for electrical operation. This is explicitly stated in the Pinout section on page 7 of the datasheet and verified in the mechanical drawings and marking diagrams.
What is the maximum power dissipation of BZX84C6V8LT3 on FR-5 board?
The BZX84C6V8LT3 is rated for 225 mW total power dissipation on FR-5 board at 25°C ambient temperature. Above 25°C, it derates linearly at 1.8 mW/°C, resulting in zero dissipation capability at approximately 158°C ambient - a value derived directly from the Maximum Ratings table on page 2 of the datasheet.
Is BZX84C6V8LT3 RoHS compliant?
Yes, the BZX84C6V8LT3 is RoHS compliant. While the base part number does not include the "G" suffix, onsemi confirms Pb-free packaging is available for the entire BZX84C series, and the "G" variant (e.g., BZX84C6V8LT1G) is explicitly marked as Pb-Free in the Ordering Information table on page 2 of the datasheet.
What is the Zener impedance of BZX84C6V8LT3 at 5 mA?
The BZX84C6V8LT3 has a maximum Zener impedance (ZZT) of 15 Ω when measured at the test current IZT = 5 mA. This value is listed in the Electrical Characteristics table on page 3 under the BZX84CxxxLT1 series and reflects dynamic resistance in the breakdown region, critical for voltage regulation stability.
BZX84C6V8LT3 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):
- 6.8 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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)
BZX84C6V8LT3 FAQ
1.How can I place an order for BZX84C6V8LT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C6V8LT3 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 BZX84C6V8LT3 reliable?
The price and inventory of BZX84C6V8LT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C6V8LT3 is usually 5 days.
3.What payment methods are accepted for BZX84C6V8LT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C6V8LT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C6V8LT3?
BZX84C6V8LT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C6V8LT3 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 BZX84C6V8LT3?
For technical support, including BZX84C6V8LT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C6V8LT3 requirements.
6.How does Aetrix verify that BZX84C6V8LT3 is sourced from the original manufacturer or authorized distributors?
All BZX84C6V8LT3 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 BZX84C6V8LT3 meets industry standards.
7.What is the process for return or replacement of BZX84C6V8LT3?
All BZX84C6V8LT3 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C6V8LT3, 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 BZX84C6V8LT3 part is unused and in its original packaging.
Return procedure for BZX84C6V8LT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C6V8LT3 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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