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Nexperia USA Inc. PDZ6.8B-QF
- Part No.:
- PDZ6.8B-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ6.8B-QF.pdf
- Description:
- DIODE ZENER 6.8V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,271
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Product details
Overview
PDZ6.8B-QF from Nexperia is a single Zener diode designed for precision voltage regulation in low-power circuits, with a nominal Zener voltage of 6.8 V (6.65–6.93 V at IZ = 5 mA), ±2 % tolerance, 400 mW total power dissipation, and SOD323 (SC-76) surface-mount package - used in automotive body control modules for stable reference voltage generation.
For engineers reviewing the PDZ6.8B-QF datasheet, PDZ6.8B-QF pinout, PDZ6.8B-QF application, or PDZ6.8B-QF equivalent, key selection criteria include Zener voltage accuracy at 5 mA, low dynamic impedance (60 Ω max at IZ = 0.5 mA), AEC-Q101 qualification, thermal resistance (Rth(j-a) = 340 K/W), and cathode-marked SMD polarity alignment.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable reverse-biased breakdown voltage across its anode–cathode terminals under controlled current conditions. Its hard breakdown knee and low leakage (<0.5 µA at VR = 5.5 V) enable precise clamping in feedback loops and reference circuits.
The diode exhibits a positive temperature coefficient of +3.4 mV/K at IZ = 5 mA, supporting predictable thermal drift behavior in ambient ranges up to +150 °C junction temperature. It is rated for non-repetitive peak reverse current up to 5.5 A (tp = 100 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.65–6.93 V at IZ = 5 mA - defines tight regulation window for 6.8 V nominal reference |
| Differential Resistance rdif | 60 Ω max at IZ = 0.5 mA - ensures minimal output voltage shift under load variation |
| Reverse Current IR | ≤0.5 µA at VR = 5.5 V - guarantees low standby power loss in always-on circuits |
| Total Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC or pulsed power handling |
| Thermal Resistance Rth(j-a) | 340 K/W - determines junction-to-ambient temperature rise per watt under standard mounting |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - defines conduction threshold when used in forward-biased protection |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
PDZ6.8B-QF uses the SOD323 (SC-76) plastic surface-mount package: 2-pin, ultra-compact (1.35 × 1.75 × 0.95 mm), cathode-indicated by a marking bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - enables use in engine control units, lighting drivers, and ADAS sensor interfaces without additional qualification effort |
| Low dynamic impedance | 60 Ω max at low test current (IZ = 0.5 mA) - improves regulation stability in low-current bias networks |
| Hard breakdown knee | Sharp, well-defined Zener transition - reduces uncertainty in turn-on voltage for overvoltage clamp circuits |
| Small footprint | SOD323 package (1.35 × 1.75 mm) - supports high-density PCB layouts in space-constrained automotive ECUs |
| Tight voltage tolerance | Approximately ±2 % - eliminates need for post-production trimming in factory-calibrated voltage references |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Providing stable 6.8 V reference for microcontroller ADC input scaling in door module electronics. IC Role / Device Role / Timing Role: Shunt voltage reference diode regulating supply rail for analog front-end circuitry. Use Value: Maintains <±10 mV output deviation across −40 °C to +125 °C ambient due to AEC-Q101 thermal validation and +3.4 mV/K TC. |
Use Scenario: Clamping transient overvoltage on 4–20 mA current loop transmitters exposed to ESD events. IC Role / Device Role / Timing Role: Reverse-biased transient suppressor protecting op-amp inputs from >1 kV surges. Use Value: Limits clamped voltage to ≤7.5 V with <10 ns response, leveraging hard knee and 5.5 A non-repetitive surge rating. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Reference |
|
Use Scenario: Setting feedback threshold in isolated flyback converter secondary-side TL431 replacement circuit. IC Role / Device Role / Timing Role: Precision Zener element establishing optocoupler LED drive threshold. Use Value: Enables ±0.5 % output regulation accuracy via 6.8 V reference stability and 60 Ω rdif minimizing load-induced error. |
Use Scenario: Generating calibrated bias voltage for photodiode amplifier stages in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Low-noise, low-leakage voltage reference stabilizing transimpedance gain. Use Value: Delivers <0.5 µA reverse leakage at 5.5 V, reducing input offset drift and enabling sub-picoampere signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V8 | Same 6.8 V nominal, but ±5 % tolerance and higher rdif (80 Ω); not AEC-Q101 qualified | Limited to commercial-grade consumer power supplies; unsuitable for automotive environments | Select only if cost sensitivity outweighs automotive compliance and tighter regulation needs |
| MMSZ4687T1G | 6.8 V nominal, ±5 % tolerance, 500 mW Ptot, SOD-123 package; AEC-Q101 qualified | Larger footprint (2.7 × 1.4 mm vs. 1.75 × 1.35 mm); higher thermal resistance (400 K/W) | Prefer when higher power margin is required and board space allows larger package |
Compared with BZX84-C6V8 and MMSZ4687T1G, PDZ6.8B-QF uniquely balances AEC-Q101 compliance, ±2 % tolerance, SOD323 miniaturization, and 60 Ω low-current impedance - making it optimal for space-constrained, thermally demanding automotive voltage references.
Availability
PDZ6.8B-QF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, medical diagnostic equipment, and consumer power adapter designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for PDZ6.8B-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 technologies.
PDZ6.8B-QF belongs to the PDZ-B-Q series of low-power Zener diodes engineered specifically for AEC-Q101-compliant voltage regulation in compact, thermally constrained automotive and industrial systems.
FAQ
What is the maximum continuous reverse current PDZ6.8B-QF can regulate at 6.8 V?
The device regulates continuously at currents up to 58.8 mA (calculated from Ptot = 400 mW ÷ VZ ≈ 400 mW ÷ 6.8 V), assuming ambient temperature ≤25 °C and standard FR4 PCB mounting. Derating applies above 25 °C per the published power derating curve.
How does the cathode marking appear on the PDZ6.8B-QF package?
The cathode is marked by a visible bar on the top surface of the SOD323 package, aligned with Pin 1 per the official Nexperia outline drawing. This matches the "K" designation in the pinning table and ensures correct orientation during automated placement.
Is PDZ6.8B-QF suitable for bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation, not symmetric transient suppression. Its forward voltage (0.9 V) and asymmetric breakdown characteristics make it unsuitable as a standalone bidirectional TVS; dedicated ESD arrays like PESD5V0S1BA should be used instead.
Does PDZ6.8B-QF require external heat sinking in typical automotive PCB layouts?
No - with Rth(j-a) = 340 K/W and Ptot = 400 mW, junction temperature rise is ~136 °C above ambient at full power. In practice, operation below 100 mW (e.g., 15 mA bias) keeps ΔTj under 34 °C, eliminating need for heatsinking on standard FR4 boards with tin-plated copper.
PDZ6.8B-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-B-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 3.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PDZ6.8B-QF FAQ
1.How can I place an order for PDZ6.8B-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ6.8B-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 PDZ6.8B-QF reliable?
The price and inventory of PDZ6.8B-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ6.8B-QF is usually 5 days.
3.What payment methods are accepted for PDZ6.8B-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ6.8B-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ6.8B-QF?
PDZ6.8B-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ6.8B-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 PDZ6.8B-QF?
For technical support, including PDZ6.8B-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ6.8B-QF requirements.
6.How does Aetrix verify that PDZ6.8B-QF is sourced from the original manufacturer or authorized distributors?
All PDZ6.8B-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 PDZ6.8B-QF meets industry standards.
7.What is the process for return or replacement of PDZ6.8B-QF?
All PDZ6.8B-QF units undergo pre-shipment inspection (PSI). If there is an issue with PDZ6.8B-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 PDZ6.8B-QF part is unused and in its original packaging.
Return procedure for PDZ6.8B-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ6.8B-QF Tags
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