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Diodes Incorporated DDZ6V8BQ-7
- Part No.:
- DDZ6V8BQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ6V8BQ-7.pdf
- Description:
- DIODE ZENER 6.8V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,004
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Product details
Overview
DDZ6V8BQ-7 from Diodes Incorporated is a precision Zener diode in SOD123 package, designed for voltage regulation and reference applications in automotive-grade power supplies and sensor signal conditioning circuits. It delivers a tightly controlled zener voltage range of 6.49 V to 6.83 V at 20 mA test current, with maximum zener impedance of 5 Ω at 1 kHz and reverse current ≤0.5 µA at 5.0 V.
For engineers reviewing the DDZ6V8BQ-7 datasheet, DDZ6V8BQ-7 pinout, DDZ6V8BQ-7 application, or DDZ6V8BQ-7 equivalent, key selection criteria include its AEC-Q101 qualification, ±3% VZ tolerance, low thermal resistance (425 °C/W on minimal pad), and suitability for high-reliability 12 V rail monitoring and ECU voltage reference designs.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current above its specified breakdown threshold. Its zener voltage exhibits a positive temperature coefficient (~0.05 %/°C near 6.8 V), enabling predictable drift behavior in ambient-temperature-varying environments.
The SOD123 package supports automated placement and reflow soldering, with matte tin–annealed terminals ensuring MIL-STD-202-compliant solderability. Thermal performance is defined under two mounting conditions: 470 mW dissipation on full copper pad (RθJA = 266 °C/W) and 294 mW on minimal recommended layout (RθJA = 425 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage Range | 6.49 V to 6.83 V at IZT = 20 mA - defines usable regulation window for 6.8 V nominal reference |
| Zener Impedance | 5 Ω max at f = 1 kHz - ensures minimal output voltage variation under dynamic load changes |
| Reverse Current | ≤0.5 µA at VR = 5.0 V - guarantees low leakage in standby or low-power sensing nodes |
| Power Dissipation | 294 mW at TA = +25°C (minimal pad layout) - sets practical continuous operating limit in compact PCB areas |
| Thermal Resistance | 425 °C/W junction-to-ambient (minimal pad) - informs derating requirements for sustained operation above 75°C |
| Operating Temp | −65 °C to +150 °C - supports under-hood automotive deployment without external thermal management |
Pinout & Package
Package: SOD123 surface-mount plastic package with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (E × D × A); moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to system ground or lowest potential point in shunt regulation path |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply via current-limiting resistor; provides stable 6.8 V reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP capability and IATF16949 manufacturing control |
| Tight VZ tolerance | ±3% over 6.49–6.83 V range enables accurate analog sensing without post-calibration |
| Low zener impedance | 5 Ω max ensures <10 mV output shift under 50 mA load transients in feedback loops |
| Green molding compound | UL 94V-0 rated, halogen- and antimony-free - meets automotive environmental compliance mandates |
| Solderable terminals | Matte tin–annealed over Alloy 42 leadframe - eliminates intermetallic formation risk in lead-free reflow |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stable 6.8 V reference for ADC biasing and op-amp offset trimming in engine knock detection circuitry. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise excitation voltage to piezoelectric sensor front-end. Use Value: Enables sub-1% measurement accuracy across −40 °C to +125 °C ambient due to tight VZ tolerance and AEC-Q101 thermal stability. |
Use Scenario: Regulation of 6.8 V supply for 4–20 mA transmitter ICs in hazardous-area pressure transmitters. IC Role / Device Role / Timing Role: Primary voltage clamp protecting analog front-end against transient overvoltage events on 24 V loop-powered lines. Use Value: Limits fault energy to <100 mJ during 100 V surge events via fast zener conduction, preserving downstream IC integrity. |
| Automotive Body Control Module (BCM) | Medical Infusion Pump Power Monitoring |
Use Scenario: Reference source for microcontroller internal ADC measuring 12 V battery voltage in door module power management. IC Role / Device Role / Timing Role: Precision shunt regulator feeding voltage divider network into MCU analog input channel. Use Value: Maintains ±0.2 V absolute accuracy over 15-year vehicle lifetime, eliminating need for periodic recalibration. |
Use Scenario: Overvoltage protection and reference generation for battery voltage monitoring in Class II medical devices. IC Role / Device Role / Timing Role: Dual-function component: clamps >7.0 V faults while supplying stable 6.8 V to safety-critical supervisor IC. Use Value: Reduces BOM count by replacing discrete TVS + reference IC, meeting IEC 60601-1 creepage and reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V8 | ±5% VZ tolerance (6.46–7.14 V), higher ZZT = 40 Ω, non-automotive grade | Lacks AEC-Q101 qualification and thermal derating data for under-hood use | Select only for cost-sensitive consumer applications where ±5% regulation is acceptable |
| MMSZ4687 | ±5% VZ (6.46–7.14 V), ZZT = 10 Ω, no automotive qualification | No PPAP support or IATF16949 traceability; moisture sensitivity level 1 but not AEC-Q101 tested | Acceptable for industrial control boards with ambient <85°C and no functional safety requirements |
Compared with DDZ6V8BQ-7, both alternatives offer wider VZ tolerance and lack automotive process controls-making them unsuitable for ECU or BCM designs requiring long-term parametric stability and change-controlled manufacturing.
Availability
DDZ6V8BQ-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor transmitters, and medical infusion pump power monitors requiring stable component supply with full traceability and lifecycle continuity.
Supply support for DDZ6V8BQ-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The DDZ series targets precision voltage reference needs in harsh-environment systems, with design focus on tight VZ tolerance, low impedance, and AEC-Q101-compliant manufacturing for mission-critical automotive subsystems.
FAQ
What is the maximum continuous power dissipation for DDZ6V8BQ-7 on a standard FR-4 PCB?
At +25°C ambient, DDZ6V8BQ-7 dissipates up to 294 mW when mounted on an FR-4 board with minimal recommended pad layout (1× pad area). This rating drops linearly to zero at +150°C case temperature, following the derating curve in Figure 1 of DS30407 Rev. 21-2.
Does DDZ6V8BQ-7 require external current limiting in shunt regulator configurations?
Yes - a series current-limiting resistor must be used to ensure zener current stays within 0.5 mA to 20 mA operating range. For 12 V input and 6.8 V output, a 270 Ω resistor limits worst-case current to ~19.3 mA at 25°C, staying within the 20 mA IZT specification.
How does the temperature coefficient affect regulation accuracy over automotive temperature ranges?
DDZ6V8BQ-7 exhibits a typical +0.05 %/°C TC near 6.8 V, resulting in ~±35 mV drift from −40°C to +125°C. This is fully characterized in Figures 16–19 and remains within ±0.5% total error when combined with initial ±3% VZ tolerance.
Can DDZ6V8BQ-7 replace older DDZ6V8B-7 parts in existing designs?
Yes - DDZ6V8BQ-7 is a direct drop-in replacement for DDZ6V8B-7 with identical electrical specs and SOD123 mechanical form factor. The "Q" suffix denotes AEC-Q101 qualification and automotive-specific change control, adding no functional or layout impact.
DDZ6V8BQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±3%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ6V8BQ-7 FAQ
1.How can I place an order for DDZ6V8BQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ6V8BQ-7 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 DDZ6V8BQ-7 reliable?
The price and inventory of DDZ6V8BQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ6V8BQ-7 is usually 5 days.
3.What payment methods are accepted for DDZ6V8BQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ6V8BQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ6V8BQ-7?
DDZ6V8BQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ6V8BQ-7 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 DDZ6V8BQ-7?
For technical support, including DDZ6V8BQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ6V8BQ-7 requirements.
6.How does Aetrix verify that DDZ6V8BQ-7 is sourced from the original manufacturer or authorized distributors?
All DDZ6V8BQ-7 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 DDZ6V8BQ-7 meets industry standards.
7.What is the process for return or replacement of DDZ6V8BQ-7?
All DDZ6V8BQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ6V8BQ-7, 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 DDZ6V8BQ-7 part is unused and in its original packaging.
Return procedure for DDZ6V8BQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ6V8BQ-7 Tags
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