My Inquiry
My Account
onsemi BZX84C6V8LT
- Part No.:
- BZX84C6V8LT
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C6V8LT.pdf
- Description:
- DIODE ZENER 6.8V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:27,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84C6V8LT from Fairchild Semiconductor is a 6.8 V, ±5% tolerance Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C ambient, with 15 Ω dynamic impedance at 5 mA test current and 2 µA maximum reverse leakage at 4.0 V. It provides precision voltage regulation in low-power biasing and reference circuits for analog sensors and microcontroller I/O protection.
For engineers reviewing the BZX84C6V8LT datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (RθJA = 465°C/W), cathode-marked polarity, junction temperature range (–55°C to +150°C), and SOT-23 footprint compatibility with automated assembly.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable voltage reference and overvoltage clamping in space-constrained PCBs. Its 6.8 V nominal breakdown voltage is specified at IZ = 5.0 mA, with dynamic impedance of 15 Ω and temperature coefficient of +1.2 mV/°C - indicating positive drift above 25°C.
The SOT-23 package features three terminals: anode, cathode, and cathode (dual-cathode configuration not applicable; pin 1 = anode, pin 2 = cathode, pin 3 = anode per standard SOT-23 Zener layout). Thermal performance relies on FR-4 board mounting (76.2 mm × 114.3 mm) per absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4–7.2 V at IZ = 5 mA - defines regulated output voltage window under nominal bias |
| Tolerance | ±5% - ensures predictable clamping threshold across production lots |
| Dynamic Impedance (ZZ) | 15 Ω at IZ = 5 mA - determines voltage deviation under load current changes |
| Reverse Leakage (IR) | 2 µA max at VR = 4.0 V - limits standby power loss in high-impedance reference nodes |
| Power Dissipation (PD) | 250 mW at TA = 25°C - sets maximum continuous DC power handling on standard FR-4 |
| Junction-to-Ambient RθJA | 465°C/W - dictates thermal rise per watt; requires derating above 25°C ambient |
| Operating Temperature | –55°C to +150°C - supports industrial and extended-temperature embedded applications |
Pinout & Package
SOT-23 plastic surface-mount package with gull-wing leads; marking "Z5" identifies BZX84C6V8LT; cathode indicated by band on lead side (pin 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries forward current during transient conduction |
| Pin 2 | Cathode | Marked terminal; connected to regulated voltage rail; establishes Zener breakdown direction |
| Pin 3 | Anode | Internally tied to Pin 1; provides mechanical stability and second solder joint for thermal path |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight reference accuracy without post-production trimming in cost-sensitive designs |
| 15 Ω dynamic impedance at 5 mA | Maintains <±70 mV regulation error across ±1 mA load variation in feedback networks |
| 2 µA max reverse leakage at 4.0 V | Minimizes quiescent current draw in battery-powered sensor biasing and level-shifting |
| SOT-23 footprint | Supports 0.65 mm pitch reflow assembly and fits within 2.9 mm × 1.3 mm board area |
| +1.2 mV/°C tempco | Predictable positive drift allows compensation in temperature-stable references using complementary components |
Applications
| Voltage Reference for ADC Biasing | Microcontroller I/O Clamp Protection |
|---|---|
|
Use Scenario: Providing stable 6.8 V reference to bias analog front-end circuitry feeding a 12-bit SAR ADC in an industrial data logger. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to deliver low-noise, temperature-compensated reference voltage. Use Value: Maintains ADC full-scale accuracy within ±0.5 LSB across –40°C to +85°C due to known +1.2 mV/°C drift and 15 Ω ZZ. |
Use Scenario: Protecting 3.3 V GPIO pins of an ARM Cortex-M4 MCU against ESD transients and supply rail overshoot during hot-plug events. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor configured as cathode-to-rail clamp with series current-limiting resistor. Use Value: Clamps excursions above 7.2 V (max VZ) while limiting peak current to <250 mA per IFRM rating. |
| Low-Power Sensor Excitation | Regulated Bias for Op-Amp Input Stage |
|
Use Scenario: Supplying excitation voltage to a resistive temperature detector (RTD) bridge in a portable medical thermometer. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed 6.8 V across bridge legs independent of supply ripple. Use Value: Delivers <100 ppm/°C effective reference stability when combined with 0.1% metal-film resistors and thermal layout symmetry. |
Use Scenario: Setting common-mode voltage for rail-to-rail input op-amp used in active filter design for audio signal conditioning. IC Role / Device Role / Timing Role: DC bias source stabilizing op-amp input common-mode point at 6.8 V in single-supply configuration. Use Value: Reduces input offset drift by 40% versus resistor-divider bias due to low ZZ and matched thermal coefficient with op-amp die. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5235BLT1G | 6.8 V, ±5%, 225 mW, ZZ = 15 Ω @ 20 mA, RθJA = 350°C/W | Higher power rating but higher thermal resistance; requires larger copper pour for same derating | Preferred where board area allows enhanced thermal relief or higher pulse energy handling is needed |
| BZX84-C6V8,215 | Identical electrical specs; same SOT-23 package; Nexperia marking "E6" | No functional difference; qualified to AEC-Q200 Grade 3 for automotive ambient temperature range | Selected when automotive qualification or alternate supply chain diversification is required |
Compared with BZX84C6V8LT, MMBZ5235BLT1G offers higher pulse robustness but demands greater PCB thermal management, while BZX84-C6V8,215 delivers identical regulation performance with automotive-grade reliability assurance.
Availability
BZX84C6V8LT is available at Aetrix Electronics and suitable for voltage reference design, I/O protection circuits, and low-power sensor biasing requiring stable component supply across industrial, instrumentation, and consumer electronics programs.
Supply support for BZX84C6V8LT 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.
The BZX84 series was developed as a family of general-purpose Zener diodes targeting cost-effective, space-efficient voltage regulation in commercial-grade applications with defined thermal and stability requirements.
FAQ
What is the maximum reverse leakage current for BZX84C6V8LT at 4.0 V?
The BZX84C6V8LT exhibits a maximum reverse leakage current of 2 µA when biased at 4.0 V, as specified in the Electrical Characteristics table. This low leakage ensures minimal parasitic loading on high-impedance reference nodes and contributes to stable operation in battery-powered systems where quiescent current must be tightly controlled. The value is measured at TA = 25°C and applies across the full production lot.
Does BZX84C6V8LT have a specified forward voltage?
Yes, the BZX84C6V8LT has a maximum forward voltage of 0.9 V at IF = 10 mA, consistent across the entire BZX84 series. This parameter is relevant when the device is used in forward conduction mode - for example, in dual-diode ESD protection configurations or during fault conditions where anode-to-cathode polarity is reversed. It is not used during normal Zener regulation.
What is the temperature coefficient of BZX84C6V8LT and how does it affect regulation?
The BZX84C6V8LT has a temperature coefficient of +1.2 mV/°C, meaning its Zener voltage increases linearly with rising junction temperature above 25°C. This positive drift enables predictable compensation in reference designs - for instance, pairing with a negative-tempco component like a thermistor or complementary transistor to achieve net zero drift over temperature. The coefficient is measured at IZ = 5 mA.
Can BZX84C6V8LT be used in place of BZX84C6V2LT?
No - BZX84C6V8LT and BZX84C6V2LT are distinct devices with non-overlapping Zener voltage ranges: BZX84C6V2LT is rated 5.8–6.8 V, while BZX84C6V8LT is 6.4–7.2 V. Substituting one for the other introduces up to 400 mV error in regulation voltage, potentially violating system-level accuracy requirements. Their dynamic impedances also differ (6 Ω vs. 15 Ω), affecting load regulation performance.
Is the SOT-23 package of BZX84C6V8LT compatible with standard pick-and-place equipment?
Yes, the BZX84C6V8LT uses JEDEC-standard SOT-23 packaging with 0.95 mm lead width, 0.65 mm lead pitch, and 2.9 mm × 1.3 mm body dimensions - fully compatible with Class II and III automated assembly systems. The "Z5" top-side marking and cathode band on pin 2 provide unambiguous orientation detection for vision-guided placement, supporting >99.99% first-pass yield in high-volume manufacturing.
BZX84C6V8LT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- 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)
BZX84C6V8LT FAQ
1.How can I place an order for BZX84C6V8LT through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C6V8LT 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 BZX84C6V8LT reliable?
The price and inventory of BZX84C6V8LT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C6V8LT is usually 5 days.
3.What payment methods are accepted for BZX84C6V8LT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C6V8LT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C6V8LT?
BZX84C6V8LT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C6V8LT 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 BZX84C6V8LT?
For technical support, including BZX84C6V8LT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C6V8LT requirements.
6.How does Aetrix verify that BZX84C6V8LT is sourced from the original manufacturer or authorized distributors?
All BZX84C6V8LT 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 BZX84C6V8LT meets industry standards.
7.What is the process for return or replacement of BZX84C6V8LT?
All BZX84C6V8LT units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C6V8LT, 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 BZX84C6V8LT part is unused and in its original packaging.
Return procedure for BZX84C6V8LT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C6V8LT Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
