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Nexperia USA Inc. BZX84W-C6V8-QX
- Part No.:
- BZX84W-C6V8-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C6V8-QX.pdf
- Description:
- DIODE ZENER 6.8V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,570
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Product details
Overview
BZX84W-C6V8-QX from Nexperia is a ±5% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 6.8 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides stable voltage reference in compact high-frequency power supply rails and ESD-protected signal conditioning circuits.
For engineers reviewing the BZX84W-C6V8-QX datasheet, BZX84W-C6V8-QX pinout, BZX84W-C6V8-QX application, or BZX84W-C6V8-QX equivalent, this page delivers verified Zener parameters, automotive-grade thermal limits, SOT323 terminal mapping, and validated alternatives for voltage regulation design-in.
Technical Context
This Zener diode operates in reverse breakdown mode with a typical differential resistance of 15 Ω at 5 mA and a positive temperature coefficient of +3.0 mV/K, enabling predictable voltage drift over temperature in bias networks. Its low 200 nA reverse current at 4 V ensures minimal leakage in standby-critical circuits.
The device features a 455 K/W junction-to-ambient thermal resistance on FR4 PCB and supports non-repetitive surge pulses up to 40 W (100 µs), making it suitable for transient suppression in automotive sensor interfaces and low-power DC-DC feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V to 7.2 V at IZ = 5 mA - defines stable regulation window for 6.8 V nominal rail |
| Differential Resistance (rdiff) | 15 Ω max at IZ = 5 mA - determines output impedance and load regulation error |
| Reverse Current (IR) | 200 nA max at VR = 4 V - ensures low quiescent current in battery-backed circuits |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C - sets maximum continuous DC power on standard FR4 layout |
| Junction Temperature (Tj) | −55 °C to +150 °C - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - certified for automotive electronics per stress test qualification standard |
| Package | SOT323 (SC-70) - 1.3 mm × 1.8 mm surface-mount footprint with 0.65 mm pitch |
Pinout & Package
SOT323 (SC-70) plastic leadless package: 1.3 mm × 1.8 mm body, 0.65 mm lead pitch, 0.45 mm max height, optimized for reflow soldering per IPC-7351B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential side in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or thermal path disruption |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential side and serves as regulated output node |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective regulation where tight voltage accuracy is not required, e.g., non-critical biasing |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS subsystems without additional qualification effort |
| 275 mW power rating on FR4 | Supports continuous regulation in space-constrained modules without heatsinking or derating |
| Low 200 nA leakage at 4 V | Minimizes standby current in always-on vehicle networks and low-power IoT edge nodes |
| 15 Ω dynamic impedance at 5 mA | Provides stable regulation under moderate load transients in feedback loops and reference buffers |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 6.8 V reference for analog front-end amplifiers in engine knock sensors and exhaust gas oxygen sensors. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precision bias point for op-amp input stages. Use Value: Maintains signal integrity across −40 °C to +125 °C ambient with <±10 mV drift due to +3.0 mV/K tempco and AEC-Q101 reliability. |
Use Scenario: Clamping USB 5 V data line voltage during ESD events or hot-plug transients in infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance (200 pF) shunt protection device absorbing 40 W surges within 100 µs. Use Value: Limits voltage excursion to ≤7.2 V while adding <0.5 pF parasitic capacitance to preserve USB 2.0 signal integrity. |
| Industrial PLC Input Protection | Low-Power MCU Reset Circuit |
Use Scenario: Protecting 24 V digital input channels against field-wiring transients in factory automation controllers. IC Role / Device Role / Timing Role: Primary clamping element in series with current-limiting resistor, sinking surge energy into ground. Use Value: Withstands repeated 1 kV/500 Ω surge pulses per IEC 61000-4-5 due to 40 W non-repetitive peak power rating. |
Use Scenario: Generating clean 6.8 V reset threshold for ARM Cortex-M0+ microcontrollers in battery-powered remote monitors. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in supervisor IC or discrete reset circuit. Use Value: Delivers <200 nA leakage at 4 V to extend shelf life beyond 10 years in coin-cell applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-B6V8-Q | ±2% tolerance (6.66–6.94 V vs. 6.4–7.2 V), lower rdif (10 Ω), higher cost | Better regulation accuracy for precision references; tighter thermal drift | Select when voltage stability <±15 mV is required across temperature and current variation |
| MMSZ4689T1G | Same 6.8 V nominal, ±5%, SOD-123 package, 500 mW Ptot, higher leakage (1 µA @ 4 V) | Larger footprint, higher power handling, less suitable for ultra-low-IQ designs | Choose when board space allows larger package and higher surge robustness is prioritized over leakage |
Compared with BZX84W-C6V8-QX, the BZX84W-B6V8-Q offers tighter regulation at higher cost, while MMSZ4689T1G trades smaller size and lower leakage for greater power capacity and relaxed leakage constraints.
Availability
BZX84W-C6V8-QX is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port overvoltage clamping, and industrial PLC input protection requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX84W-C6V8-QX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZX84W-Q series targets automotive and industrial voltage regulation needs, delivering AEC-Q101-compliant Zener diodes in miniature SOT323 packages for space- and reliability-critical applications.
FAQ
What is the maximum continuous forward current for BZX84W-C6V8-QX?
The absolute maximum forward current is 200 mA per limiting values table. However, sustained forward conduction is not its intended operating mode; the device is designed for reverse-bias Zener regulation, and forward operation should be limited to brief test or ESD clamp events only.
Does BZX84W-C6V8-QX require a series current-limiting resistor in regulation circuits?
Yes - a series resistor is mandatory to limit Zener current to within 5 mA (typical test condition) or below the 275 mW power limit. For example, at 12 V input and 6.8 V output, a minimum 1.04 kΩ resistor limits power to 275 mW; actual value depends on load and thermal margin requirements.
How does the +3.0 mV/K temperature coefficient affect regulation accuracy over temperature?
Over a −40 °C to +125 °C range (165 K delta), the Zener voltage shifts by +495 mV - approximately +7.3% of nominal 6.8 V. This must be accounted for in precision references; however, it enables predictable compensation in temperature-sensing bias networks.
Can BZX84W-C6V8-QX replace older BZX84-C6V8 in existing designs?
Yes - it shares identical electrical specifications and SOT323 footprint but adds AEC-Q101 qualification and improved thermal performance (455 K/W vs. legacy 500+ K/W). No layout change is needed, and automotive-grade reliability is gained without functional compromise.
BZX84W-C6V8-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5.88%
- Power - Max:
- 275 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C6V8-QX FAQ
1.How can I place an order for BZX84W-C6V8-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C6V8-QX 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 BZX84W-C6V8-QX reliable?
The price and inventory of BZX84W-C6V8-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C6V8-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-C6V8-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C6V8-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C6V8-QX?
BZX84W-C6V8-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C6V8-QX 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 BZX84W-C6V8-QX?
For technical support, including BZX84W-C6V8-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C6V8-QX requirements.
6.How does Aetrix verify that BZX84W-C6V8-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-C6V8-QX 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 BZX84W-C6V8-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-C6V8-QX?
All BZX84W-C6V8-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C6V8-QX, 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 BZX84W-C6V8-QX part is unused and in its original packaging.
Return procedure for BZX84W-C6V8-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C6V8-QX Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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