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onsemi BZX84C6V8LT1
- Part No.:
- BZX84C6V8LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C6V8LT1.pdf
- Description:
- DIODE ZENER 6.8V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,274
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Product details
Overview
BZX84C6V8LT1 from onsemi is a 6.8 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 15 Ω dynamic impedance at 5 mA test current and 4.5 pF capacitance at 0 V bias - used for voltage regulation and reference in space-constrained portable electronics.
For engineers reviewing the BZX84C6V8LT1 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 automated assembly.
Technical Context
This device operates as a two-terminal voltage reference by exploiting reverse-biased Zener breakdown at precisely controlled 6.8 V. Its 15 Ω Zener impedance at 5 mA ensures stable regulation under moderate load variation, while its −65°C to +150°C junction temperature range supports operation in consumer and industrial environments.
The SOT-23 package features pin 1 (anode), pin 2 (no connection), and pin 3 (cathode), with polarity indicated by a band. It delivers Class 3 ESD robustness (>16 kV HBM) and UL 94 V-0 flammability rating, enabling reliable use in handheld portables without additional protection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 6.8 V nominal, min 6.4 V / max 7.2 V at 5 mA - defines regulated output level with ±5% tolerance. |
| Power Dissipation | 225 mW on FR-5 board at 25°C - sets maximum continuous power handling before thermal derating. |
| Zener Impedance | 15 Ω at IZT = 5 mA - determines output voltage stability under changing load current. |
| Capacitance | 155 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in bypass applications. |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables direct integration into unshielded portable interfaces without external ESD protection. |
| Thermal Resistance | 556 °C/W (Junction-to-Ambient on FR-5) - informs PCB copper area requirements for thermal management. |
| Leakage Current | 2 µA max at VR = 6.2 V - ensures minimal quiescent current draw in low-power standby circuits. |
Pinout & Package
SOT-23 surface-mount plastic package (Case 318, Style 8), void-free thermosetting material, UL 94 V-0 rated, cathode marked by band. Dimensions: 2.80–3.04 mm length, 1.20–1.40 mm width, 0.99–1.26 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; must be held at voltage ≤ cathode minus 6.8 V to activate regulation. |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required. |
| 3 | Cathode | Connected to higher-potential node; polarity band identifies this terminal for correct orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating | Enables compact voltage clamping in battery-powered devices without heatsinking. |
| Tight Zener Tolerance | ±5% at 5 mA ensures predictable regulation across production batches without calibration. |
| ESD Robustness | Class 3 (>16 kV HBM) allows direct integration into exposed I/O lines of cellular handsets. |
| Automated Assembly Optimized | Standard SOT-23 footprint and lead geometry support high-yield pick-and-place and reflow processes. |
| High-Density Packaging | Small 2.8 × 1.2 × 1.0 mm outline reduces PCB real estate in multi-rail portable power systems. |
Applications
| Smartphone Power Rail Clamping | USB Interface Voltage Reference |
|---|---|
Use Scenario: Protecting 5 V USB data lines from transient overvoltage during hot-plug events in mobile accessories. IC Role / Device Role / Timing Role: Zener clamp limiting line voltage to 6.8 V to prevent damage to downstream transceivers. Use Value: Eliminates need for discrete TVS diodes by leveraging BZX84C6V8LT1's 16 kV HBM rating and fast response in <1 ns. | Use Scenario: Providing stable 6.8 V reference for analog comparators monitoring USB VBUS status in OTG detection circuits. IC Role / Device Role / Timing Role: Precision voltage reference source with low 15 Ω dynamic impedance ensuring minimal drift under varying load. Use Value: Enables accurate VBUS presence detection within ±0.4 V tolerance across temperature, supporting USB 2.0 compliance. |
| Wearable Sensor Biasing | IoT Node Battery Monitoring |
Use Scenario: Biasing analog front-end op-amps in compact health-monitoring wearables powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current Zener reference supplying stable 6.8 V to sensor signal conditioning stages. Use Value: Delivers 2 µA max leakage at 6.2 V, extending battery life beyond 12 months in always-on sensing modes. | Use Scenario: Scaling lithium-ion battery voltage for ADC input in Bluetooth LE asset trackers with 2.5–4.2 V operating range. IC Role / Device Role / Timing Role: Zener-based resistive divider reference point ensuring consistent ADC full-scale mapping. Use Value: Maintains ±0.2 V regulation accuracy from −40°C to +85°C, enabling precise state-of-charge estimation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5235BLT1 | Same 6.8 V nominal, but ±5% tolerance achieved at 20 mA test current; 10 Ω Zener impedance vs. 15 Ω. | Lower impedance suits higher-current regulation; slightly higher capacitance (170 pF) may affect RF-sensitive nodes. | Select when tighter dynamic regulation under >10 mA loads is required, and layout accommodates marginally higher capacitance. |
| BZX84C6V8LT3G | Pb-free variant in same SOT-23 package; identical electrical specs; shipped in 10,000-piece tape-and-reel vs. 3,000 for LT1. | No functional difference; intended for RoHS-compliant high-volume manufacturing with longer reel logistics. | Choose for new designs requiring lead-free compliance and extended supply continuity via larger reels. |
Compared with BZX84C6V8LT1, MMBZ5235BLT1 offers lower dynamic impedance for improved load regulation but trades off higher capacitance, while BZX84C6V8LT3G provides identical performance in Pb-free packaging optimized for volume production - both require no PCB changes but differ in sourcing and thermal derating context.
Availability
BZX84C6V8LT1 is available at Aetrix Electronics and suitable for smartphone power rail clamping, USB interface voltage reference, and wearable sensor biasing requiring stable component supply with full traceability and lifecycle management.
Supply support for BZX84C6V8LT1 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The BZX84C6V8LT1 belongs to the BZX84CxxxLT1 series of standard-tolerance Zener diodes designed specifically for space-constrained voltage regulation in portable and high-density PCBs.
FAQ
What is the Zener voltage tolerance of the BZX84C6V8LT1?
The BZX84C6V8LT1 has a nominal Zener voltage of 6.8 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 6.4 V and 7.2 V when tested at 5 mA (IZT). This tolerance is specified per the BZX84CxxxLT1 series datasheet and applies across the full operating temperature range of −65°C to +150°C. The BZX84C6V8LT1 achieves this tolerance without requiring external trimming or calibration.
Does the BZX84C6V8LT1 have a connected pin 2?
No, pin 2 of the BZX84C6V8LT1 is internally not connected (NC) and must remain unconnected on the PCB. The device uses only pins 1 (anode) and 3 (cathode) for operation. This three-pin SOT-23 configuration is standardized across the BZX84CxxxLT1 series, with pin 2 reserved for mechanical symmetry and process compatibility - it carries no electrical function in the BZX84C6V8LT1.
What is the maximum power dissipation of the BZX84C6V8LT1 on an FR-5 board?
The BZX84C6V8LT1 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, reaching zero dissipation at approximately 153°C ambient. This rating assumes standard JEDEC-defined board conditions (1.0 × 0.75 × 0.62 inch FR-5) and is validated per the official onsemi datasheet revision 7. Exceeding this limit risks thermal runaway and permanent degradation of the BZX84C6V8LT1.
Can the BZX84C6V8LT1 be used as a substitute for the BZX84B6V8LT1?
The BZX84C6V8LT1 is not a direct substitute for the BZX84B6V8LT1 because they belong to different tolerance classes: BZX84C6V8LT1 has ±5% tolerance, while BZX84B6V8LT1 offers tighter ±1% tolerance (6.66–6.94 V). Although both share identical package, pinout, and basic electrical parameters, the BZX84B6V8LT1's tighter spec makes it suitable for precision references where BZX84C6V8LT1's wider 6.4–7.2 V range may cause system-level margin violations.
What is the ESD rating of the BZX84C6V8LT1?
The BZX84C6V8LT1 has an ESD rating of Class 3 per the Human Body Model (HBM), exceeding 16 kV. This rating is confirmed in the "Specification Features" section of the official onsemi datasheet and reflects robustness against electrostatic discharge during handling and board assembly. The BZX84C6V8LT1 achieves this without external protection components, making it suitable for integration into exposed signal paths in handheld devices.
BZX84C6V8LT1 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)
BZX84C6V8LT1 FAQ
1.How can I place an order for BZX84C6V8LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C6V8LT1 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 BZX84C6V8LT1 reliable?
The price and inventory of BZX84C6V8LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C6V8LT1 is usually 5 days.
3.What payment methods are accepted for BZX84C6V8LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C6V8LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C6V8LT1?
BZX84C6V8LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C6V8LT1 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 BZX84C6V8LT1?
For technical support, including BZX84C6V8LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C6V8LT1 requirements.
6.How does Aetrix verify that BZX84C6V8LT1 is sourced from the original manufacturer or authorized distributors?
All BZX84C6V8LT1 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 BZX84C6V8LT1 meets industry standards.
7.What is the process for return or replacement of BZX84C6V8LT1?
All BZX84C6V8LT1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C6V8LT1, 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 BZX84C6V8LT1 part is unused and in its original packaging.
Return procedure for BZX84C6V8LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C6V8LT1 Tags
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MM5Z5V1ST1G
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