My Inquiry
My Account
Nexperia USA Inc. PDZ6.8B-QZ
- Part No.:
- PDZ6.8B-QZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ6.8B-QZ.pdf
- Description:
- DIODE ZENER 6.8V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,801
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PDZ6.8B-QZ 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. It delivers stable reference voltage in automotive-grade power supply rails, ECU bias networks, and sensor interface protection circuits.
For engineers reviewing the PDZ6.8B-QZ datasheet, PDZ6.8B-QZ pinout, PDZ6.8B-QZ application, or PDZ6.8B-QZ equivalent, key selection criteria include Zener voltage accuracy at 5 mA, low dynamic impedance (≤40 Ω), temperature coefficient (+3.4 mV/K), reverse leakage (<0.5 µA at VR = 5.5 V), and AEC-Q101 qualification for automotive deployment.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its cathode-anode terminals. Its hard breakdown knee and low leakage current enable accurate clamping in low-current biasing applications, while its thermal resistance (Rth(j-a) = 340 K/W on FR4 PCB) defines derating behavior above 25 °C ambient.
The device exhibits a positive temperature coefficient of +3.4 mV/K at IZ = 5 mA, indicating voltage increases linearly with junction temperature - critical for thermal stability analysis in engine control modules and ADAS sensor front-ends where ambient swings exceed 100 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.65–6.93 V at IZ = 5 mA; ensures tight regulation window for 6.8 V reference designs |
| Differential Resistance rdif | ≤40 Ω at IZ = 5 mA; minimizes output voltage variation under load transients |
| Reverse Leakage IR | ≤0.5 µA at VR = 5.5 V; preserves low quiescent current in battery-powered systems |
| Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C; supports continuous operation in compact SMD layouts |
| Temperature Coefficient SZ | +3.4 mV/K at IZ = 5 mA; enables predictable drift compensation in wide-temperature environments |
| Forward Voltage VF | 0.9 V at IF = 10 mA; defines conduction threshold when used bidirectionally or in series |
| Junction Temperature Tj | −65 to +150 °C; validated for under-hood automotive electronics per AEC-Q101 |
Pinout & Package
PDZ6.8B-QZ uses the SOD323 (SC-76) plastic surface-mount package: 1.35 mm × 0.8 mm footprint, 0.45 mm height, cathode marked by a bar on the top surface. Mounting requires reflow-compatible solder lands per Figure 9 (0.6 mm × 0.5 mm pads, 1.65 mm center-to-center).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage node; marking bar identifies this terminal for correct PCB orientation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Hard breakdown knee | Sharp, well-defined Zener transition enables precise voltage clamping without soft saturation |
| Low dynamic impedance | 60 Ω max at IZ = 0.5 mA and 40 Ω max at IZ = 5 mA improves regulation under varying load |
| Small SOD323 package | 0.8 mm × 1.35 mm footprint saves board space in high-density automotive PCBs |
| ±2 % voltage tolerance | Reduces need for post-production trimming in factory-calibrated sensor signal chains |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Bias Reference |
|---|---|
|
Use Scenario: Protects microcontroller I/O pins and analog front-ends from transient overvoltage on 5–12 V supply rails in engine control units. IC Role / Device Role / Timing Role: Zener clamping diode placed between rail and ground to shunt surge energy above 6.8 V. Use Value: With 5.5 A non-repetitive peak reverse current rating and AEC-Q101 qualification, it withstands ISO 7637-2 pulse 1/2a/5a events without degradation. |
Use Scenario: Provides stable 6.8 V bias for bridge-based pressure sensors in factory automation PLC input modules. IC Role / Device Role / Timing Role: Precision voltage reference source for op-amp excitation circuitry requiring low-drift, low-noise DC bias. Use Value: +3.4 mV/K temperature coefficient and <0.5 µA leakage ensure sensor offset error remains below 0.1 % FS over −40 to +125 °C. |
| USB-C Port Overvoltage Protection | IoT Node Battery Monitoring Circuit |
|
Use Scenario: Guards USB-C power delivery interface ICs against accidental 9–12 V adapter misconnection in portable docking stations. IC Role / Device Role / Timing Role: Standoff Zener in series with TVS diode to set precise clamping threshold before TVS activation. Use Value: 40 Ω dynamic impedance ensures fast response to 100 ns rise-time transients while limiting overshoot to <7.2 V. |
Use Scenario: Monitors lithium-ion cell voltage via resistive divider in BLE-enabled asset trackers with 10-year battery life targets. IC Role / Device Role / Timing Role: Low-leakage Zener reference in ADC reference buffer stage to stabilize measurement accuracy. Use Value: 0.5 µA max reverse current at 5.5 V prevents >1 nA parasitic drain, preserving µA-level sleep current budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B6V8 | Same 6.8 V nominal, ±2 %, but SOD323 package with 300 mW Ptot and higher rdif (80 Ω) | Lacks AEC-Q101 qualification; suitable only for commercial-grade consumer devices | Select when cost sensitivity outweighs automotive reliability requirements |
| MMSZ4687T1G | 6.8 V nominal, ±5 % tolerance, 500 mW Ptot, but higher leakage (1 µA) and no AEC-Q101 validation | Higher power handling but less precise regulation; not recommended for automotive sensor references | Prefer for industrial power supplies where voltage tolerance >2 % is acceptable |
Compared with BZX384-B6V8 and MMSZ4687T1G, PDZ6.8B-QZ uniquely combines AEC-Q101 qualification, ±2 % tolerance, and 40 Ω dynamic impedance - making it the only choice for automotive-critical Zener references demanding both precision and stress resilience.
Availability
PDZ6.8B-QZ is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor calibration, and IoT battery monitoring systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for PDZ6.8B-QZ 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 PDZ-B-Q series targets automotive and industrial voltage regulation needs, delivering AEC-Q101-compliant Zener diodes optimized for low-leakage, sharp breakdown, and robust thermal performance in space-constrained SMD designs.
FAQ
What is the maximum reverse current PDZ6.8B-QZ can handle during transient events?
PDZ6.8B-QZ supports a non-repetitive peak reverse current (IZSM) of 5.5 A at tp = 100 µs and Tamb = 25 °C. This rating enables reliable clamping of ISO 7637-2 Pulse 5a surges in automotive applications without permanent degradation, provided PCB layout maintains adequate thermal relief.
How does the +3.4 mV/K temperature coefficient affect voltage regulation accuracy over temperature?
At IZ = 5 mA, the +3.4 mV/K coefficient causes a +0.34 V shift over a 100 °C junction range (25–125 °C), resulting in a 6.8 V nominal becoming ~7.14 V. Designers must account for this linear drift in closed-loop feedback paths or pair with negative-TC components for compensation.
Is PDZ6.8B-QZ compatible with standard reflow soldering profiles for FR4 PCBs?
Yes - PDZ6.8B-QZ is qualified for lead-free reflow per J-STD-020, with a maximum peak temperature of 260 °C. The SOD323 package uses tin-plated terminations and matches standard reflow footprints (0.6 mm × 0.5 mm pads, 1.65 mm pitch), ensuring reliable joint formation without tombstoning.
Can PDZ6.8B-QZ be used in forward-biased configurations, such as LED current limiting?
Yes - with VF = 0.9 V at IF = 10 mA and 1.1 V at 100 mA, PDZ6.8B-QZ functions as a low-drop silicon diode in forward bias. However, its 200 mA continuous forward current limit and lack of optimized forward characteristics make dedicated rectifiers preferable for high-current applications.
PDZ6.8B-QZ 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-QZ FAQ
1.How can I place an order for PDZ6.8B-QZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ6.8B-QZ 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-QZ reliable?
The price and inventory of PDZ6.8B-QZ 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-QZ is usually 5 days.
3.What payment methods are accepted for PDZ6.8B-QZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ6.8B-QZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ6.8B-QZ?
PDZ6.8B-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ6.8B-QZ 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-QZ?
For technical support, including PDZ6.8B-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ6.8B-QZ requirements.
6.How does Aetrix verify that PDZ6.8B-QZ is sourced from the original manufacturer or authorized distributors?
All PDZ6.8B-QZ 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-QZ meets industry standards.
7.What is the process for return or replacement of PDZ6.8B-QZ?
All PDZ6.8B-QZ units undergo pre-shipment inspection (PSI). If there is an issue with PDZ6.8B-QZ, 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-QZ part is unused and in its original packaging.
Return procedure for PDZ6.8B-QZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ6.8B-QZ 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
