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Nexperia USA Inc. BZX84W-C6V8-QF
- Part No.:
- BZX84W-C6V8-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C6V8-QF.pdf
- Description:
- DIODE ZENER 6.8V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,192
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Product details
Overview
BZX84W-C6V8-QF 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 low-power biasing, overvoltage protection, and signal conditioning circuits.
For engineers reviewing the BZX84W-C6V8-QF datasheet, BZX84W-C6V8-QF pinout, BZX84W-C6V8-QF application, or BZX84W-C6V8-QF equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (80 Ω at 5 mA), temperature coefficient (+3.0 mV/K), reverse leakage (2 µA at 4 V), and AEC-Q101 qualification status.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 6.8 V reference across load variations and temperature shifts. Its +3.0 mV/K temperature coefficient ensures predictable voltage drift with junction temperature, and its 80 Ω differential resistance minimizes output impedance under dynamic current conditions.
The device supports both DC regulation and transient suppression functions, with non-repetitive peak reverse power dissipation up to 40 W for 100 µs pulses and thermal resistance of 455 K/W when mounted on standard FR4 PCB. It is not intended for high-current shunt regulation but optimized for precision low-power reference and clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V to 7.2 V at IZ = 5 mA - defines operating range for stable regulation in ±5 % tolerance grade |
| Differential Resistance (rdiff) | 80 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +3.0 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius rise in junction temperature |
| Reverse Leakage (IR) | 2 µA max at VR = 4 V - sets minimum bias current requirement and standby power loss |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - limits continuous DC power handling in standard layout |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines forward conduction drop when used in series or dual-diode configurations |
| Junction Temperature (Tj) | −55 °C to +150 °C - enables operation in extended automotive under-hood environments |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals; compact 2.2 mm × 1.35 mm footprint and 0.65 mm pitch; suitable for high-density PCB layouts and automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node during Zener operation |
| 2 | Not Connected (n.c.) | Electrically isolated terminal; no internal bond wire or die connection; must remain unconnected |
| 3 | Cathode (K) | Reverse-bias terminal; connected to higher-potential node to enable Zener breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ±5 % Zener voltage tolerance | Enables cost-effective selection where tighter regulation is not required, balancing accuracy and BOM cost |
| Low differential resistance (80 Ω) | Improves regulation stability under varying load currents compared to higher-rdiff Zeners |
| High-temperature operation (Tj ≤ 150 °C) | Supports placement near heat-generating components in engine control units and ADAS modules |
| SC-70/SOT323 package | Reduces board space by >50 % versus SOT23 while maintaining compatibility with standard pick-and-place equipment |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 6.8 V reference for analog sensor signal conditioning in engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt voltage reference, setting bias point for op-amp input stages and ADC reference dividers. Use Value: Maintains sensor linearity and offset accuracy across −40 °C to +125 °C ambient, enabled by +3.0 mV/K temperature coefficient and AEC-Q101 qualification. |
Use Scenario: Clamping transient surges on USB VBUS line to protect downstream USB controller ICs from ESD and hot-swap spikes. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that conducts above 6.8 V to divert surge energy to ground before reaching sensitive logic. Use Value: Limits peak voltage to ≤7.2 V (max VZ) with 2 µA leakage at 4 V, minimizing standby power impact on battery-powered devices. |
| Industrial PLC Input Protection | Low-Power MCU Reset Circuit |
|
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers against field-wiring transients and polarity reversal. IC Role / Device Role / Timing Role: Reverse-biased Zener placed between input and ground to clamp negative excursions and absorb positive surges up to 40 W (100 µs). Use Value: Withstands repetitive 1 kV/µs fast transients per IEC 61000-4-4 due to low rdiff and robust 275 mW steady-state rating on FR4. |
Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3 V microcontrollers in smart meter and IoT edge nodes. IC Role / Device Role / Timing Role: Zener-based voltage divider feeding comparator input to assert reset when supply drops below 3.0 V. Use Value: Achieves ±1.5 % reset threshold accuracy over temperature using matched resistor ratio and +3.0 mV/K VZ tracking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C6V8-Q | Same electrical specs and AEC-Q101 qualification; differs only in marking code (P7% vs QF) and packaging variant | No functional difference; QF denotes tape-and-reel with specific orientation or reel ID per Nexperia internal coding | Select QF for automated SMT lines requiring verified tape orientation; Q is functionally identical for manual or alternate feed systems |
| MMSZ4687T1G | 6.8 V ±5 %, 500 mW Ptot, SOD-123 package, no AEC-Q101 qualification | Higher power handling but larger footprint (3.7 mm × 1.6 mm); unsuitable for automotive safety-critical modules | Choose only for industrial or consumer designs where AEC-Q101 is not mandated and board space allows larger package |
Compared with BZX84W-C6V8-QF, the Q variant offers identical performance with different packaging logistics, while MMSZ4687T1G trades automotive qualification and miniaturization for higher power and non-automotive compliance-making QF optimal for space-constrained AEC-Q101 designs.
Availability
BZX84W-C6V8-QF is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port overvoltage clamp, and industrial PLC input protection requiring stable component supply, AEC-Q101 traceability, and SOT323 footprint consistency.
Supply support for BZX84W-C6V8-QF 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 belongs to Nexperia's automotive-grade Zener diode product line, engineered specifically for precision voltage reference and transient protection in harsh-environment electronic control units.
FAQ
What is the maximum continuous reverse current this Zener can handle at 6.8 V?
The BZX84W-C6V8-QF is not rated for continuous reverse current at its Zener voltage. Its specified test condition is IZ = 5 mA for parameter characterization. Continuous operation should stay within Ptot = 275 mW limit, yielding ~40 mA max at 6.8 V on FR4 PCB at 25 °C ambient-derated linearly above 25 °C using Rth(j-a) = 455 K/W.
Can this diode be used in parallel for higher power dissipation?
No-Zener diodes exhibit manufacturing spread in VZ and rdiff, causing current imbalance. Even two BZX84W-C6V8-QF units in parallel will not share current equally; one will dominate conduction and likely exceed its 275 mW rating. Use a single higher-power Zener or active regulation instead.
Is Pin 2 truly unused, or does it serve a mechanical function?
Pin 2 is electrically not connected (n.c.) per Nexperia's official pinning table and internal die layout. It serves only as a mechanical stabilization pad in the SOT323 mold compound-no bond wire attaches to it, and routing traces to it provides no electrical benefit or risk, but it must remain unconnected in circuit design.
How does the +3.0 mV/K temperature coefficient affect long-term voltage stability?
A +3.0 mV/K coefficient means VZ increases by ~3 mV per °C rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C ambient, assuming ~50 °C self-heating), VZ shifts ~300 mV-within the ±5 % (±340 mV) tolerance band. This predictable drift supports compensation in precision references but requires thermal-aware layout.
BZX84W-C6V8-QF 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-QF FAQ
1.How can I place an order for BZX84W-C6V8-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C6V8-QF 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-QF reliable?
The price and inventory of BZX84W-C6V8-QF 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-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-C6V8-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C6V8-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C6V8-QF?
BZX84W-C6V8-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C6V8-QF 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-QF?
For technical support, including BZX84W-C6V8-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C6V8-QF requirements.
6.How does Aetrix verify that BZX84W-C6V8-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-C6V8-QF 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-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-C6V8-QF?
All BZX84W-C6V8-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C6V8-QF, 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-QF part is unused and in its original packaging.
Return procedure for BZX84W-C6V8-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C6V8-QF 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
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BZX84C3V3LT1G
onsemi
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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
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SMAZ12-13-F
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