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Diodes Incorporated DDZ12BQ-7
- Part No.:
- DDZ12BQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ12BQ-7.pdf
- Description:
- DIODE ZENER 12V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
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Product details
Overview
DDZ12BQ-7 from Diodes Incorporated is a precision Zener diode in SOD123 package, designed for voltage regulation and reference applications in automotive-grade power management circuits. It delivers a tightly controlled zener voltage of 11.44 V to 12.03 V at 10 mA test current, with maximum zener impedance of 12 Ω at 1 kHz and 0.1 µA reverse leakage at 9.1 V. It is AEC-Q101 qualified and manufactured in IATF16949-certified facilities.
For engineers reviewing the DDZ12BQ-7 datasheet, DDZ12BQ-7 pinout, DDZ12BQ-7 application, or DDZ12BQ-7 equivalent, this page provides verified electrical parameters, thermal derating behavior, temperature coefficient data, automotive qualification status, and real-world use context for voltage reference design in engine control units, ADAS power rails, and infotainment supply monitoring.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across variable load and input conditions via reverse-biased breakdown conduction. Its 12 V nominal zener voltage falls within the optimal range for low-drift, medium-power reference applications where temperature coefficient is minimized (±0.05 %/°C typical near 12 V).
The SOD123 package enables high-density PCB layout while supporting automated reflow assembly. Thermal resistance is specified at 425 °C/W (J-A, minimal pad) and 266 °C/W (J-A, 1 in² copper), enabling reliable operation up to +150 °C junction temperature under defined board-level cooling conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.44 V to 12.03 V at IZT = 10 mA - defines stable regulation point for feedback loops and reference nodes |
| Zener Impedance (ZZT) | 12 Ω max at f = 1 kHz - ensures minimal output voltage variation under dynamic load transients |
| Reverse Leakage (IR) | 0.1 µA max at VR = 9.1 V - guarantees low quiescent current in standby or battery-backed circuits |
| Power Dissipation (PD) | 294 mW at TA = +25°C (minimal pad) - sets practical continuous operating limit for compact layouts |
| Temp. Coefficient (TCVZ) | ±0.05 %/°C typical near 12 V - enables <±10 mV drift over –40°C to +125°C ambient in automotive environments |
| Junction Temp. Range | –65°C to +150°C - supports under-hood and transmission-control module deployment |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress-test requirements including HTOL, TCT, and ESD |
Pinout & Package
Package: SOD123 surface-mount plastic package with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); weight ≈ 0.01 g; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lowest potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input rail through series resistor; supplies stable reference to error amplifier or comparator |
Key Features
| Feature | Design Value |
|---|---|
| Tight VZ tolerance | ±2.5% (11.44–12.03 V range at 10 mA) - reduces need for post-production trimming in precision references |
| AEC-Q101 qualification | Validated for automotive use with PPAP capability - eliminates requalification effort for Tier 1 suppliers |
| Green packaging | Halogen- and antimony-free, RoHS 3 compliant - meets global environmental compliance mandates without performance trade-off |
| Low thermal resistance | 266 °C/W with 1 in² copper pad - enables >300 mW usable dissipation in thermally constrained ECUs |
| Stable TC near zero | Minimal temperature coefficient crossing near 12 V - delivers <±5 mV total drift over full automotive temperature range |
Applications
| Engine Control Unit (ECU) Reference | ADAS Camera Power Monitor |
|---|---|
|
Use Scenario: Provides stable 12 V reference for microcontroller ADC calibration and sensor biasing in gasoline/diesel engine control modules. IC Role / Device Role / Timing Role: Shunt voltage reference for analog front-end and power rail supervision circuitry. Use Value: Enables ±0.5% ADC accuracy over –40°C to +125°C ambient without external compensation. |
Use Scenario: Monitors 12 V camera supply rail in forward-facing ADAS cameras to trigger fault reporting before brownout. IC Role / Device Role / Timing Role: Precision threshold detector input node for comparator-based undervoltage lockout. Use Value: Delivers 9.1 V reverse breakdown knee with <0.1 µA leakage, minimizing false triggers during transient load dumps. |
| Infotainment System LDO Feedback | Body Control Module (BCM) Wake-Up Circuit |
|
Use Scenario: Sets regulated 5 V output in automotive-grade LDOs powering display controllers and audio codecs. IC Role / Device Role / Timing Role: External reference for adjustable LDO feedback divider network. Use Value: Maintains <±10 mV output stability over lifetime aging and thermal cycling due to low ZZT and tight VZ spread. |
Use Scenario: Generates wake-up signal when vehicle battery voltage rises above 11.5 V after ignition-off sleep mode. IC Role / Device Role / Timing Role: Zener-clamped threshold element feeding Schmitt-trigger input of system controller. Use Value: Ensures consistent wake-up threshold across production lots and temperature extremes with no calibration required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12LT1G | 12 V nominal, ±5% tolerance, 15 Ω ZZT, SOT-23 package | Higher VZ tolerance and impedance; smaller footprint but lower power rating (300 mW) | Acceptable for non-critical consumer-grade references where AEC-Q101 is not required |
| MMSZ5242B-TP | 12 V nominal, ±5% tolerance, 30 Ω ZZT, SOD-123 package, commercial grade | Same package but lacks AEC-Q101 qualification and tighter VZ spec; higher leakage (1 µA @ 9.1 V) | Suitable for cost-sensitive industrial designs where automotive reliability is not mandated |
Compared with BZX84-C12LT1G and MMSZ5242B-TP, DDZ12BQ-7 offers superior voltage stability (±2.5% vs. ±5%), lower impedance (12 Ω vs. ≥15 Ω), and guaranteed automotive qualification-making it the only choice for safety-critical ECU and ADAS voltage reference functions.
Availability
DDZ12BQ-7 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, and infotainment power management systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for DDZ12BQ-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 automotive electronics, with design emphasis on AEC-Q101 compliance, tight parametric distribution, and robust thermal performance in compact SOD123 packaging.
FAQ
What is the maximum continuous power dissipation for DDZ12BQ-7 at +75°C ambient?
At TL = +75°C, the maximum power dissipation is 500 mW per the datasheet's note 6. This rating assumes proper heat sinking via leadframe-to-PCB thermal path and applies to board-level thermal design with adequate copper area. Derating begins linearly beyond +75°C per Figure 1.
Is DDZ12BQ-7 compatible with lead-free reflow profiles?
Yes-DDZ12BQ-7 is fully RoHS 3 compliant and qualified for standard JEDEC J-STD-020 lead-free reflow profiles, including peak temperatures up to 260°C. Its matte tin annealed terminals ensure reliable solder wetting and intermetallic formation without voiding or dewetting.
How does the temperature coefficient behave near 12 V?
Per Figures 16–19, the temperature coefficient crosses zero near 12 V, yielding ±0.05 %/°C typical drift. This results in <±5 mV total VZ shift from –40°C to +125°C, making it ideal for applications demanding minimal thermal drift without active compensation.
Can DDZ12BQ-7 replace DDZ12B-7 in existing designs?
Yes-DDZ12BQ-7 is the automotive-qualified variant of DDZ12B-7, sharing identical electrical specs and SOD123 mechanical form factor. The "Q" suffix denotes AEC-Q101 qualification, PPAP capability, and IATF16949 manufacturing, with no electrical or layout changes required for drop-in replacement in automotive designs.
DDZ12BQ-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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 12 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9.1 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
DDZ12BQ-7 FAQ
1.How can I place an order for DDZ12BQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ12BQ-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 DDZ12BQ-7 reliable?
The price and inventory of DDZ12BQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ12BQ-7 is usually 5 days.
3.What payment methods are accepted for DDZ12BQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ12BQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ12BQ-7?
DDZ12BQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ12BQ-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 DDZ12BQ-7?
For technical support, including DDZ12BQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ12BQ-7 requirements.
6.How does Aetrix verify that DDZ12BQ-7 is sourced from the original manufacturer or authorized distributors?
All DDZ12BQ-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 DDZ12BQ-7 meets industry standards.
7.What is the process for return or replacement of DDZ12BQ-7?
All DDZ12BQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ12BQ-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 DDZ12BQ-7 part is unused and in its original packaging.
Return procedure for DDZ12BQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ12BQ-7 Tags
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