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Diodes Incorporated DDZ9V1CQ-7
- Part No.:
- DDZ9V1CQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9V1CQ-7.pdf
- Description:
- DIODE ZENER 9.1V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,829
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Product details
Overview
DDZ9V1CQ-7 from Diodes Incorporated is a precision automotive-grade Zener diode in SOD123 package, delivering nominal 9.1 V zener voltage (8.83–9.30 V range) at 20 mA test current, with 8 Ω dynamic impedance at 1 kHz and <0.5 µA reverse leakage at 7.0 V. It serves as a stable voltage reference or overvoltage clamp in power supply feedback loops and sensor biasing circuits.
For engineers reviewing the DDZ9V1CQ-7 datasheet, DDZ9V1CQ-7 pinout, DDZ9V1CQ-7 application, or DDZ9V1CQ-7 equivalent, key selection criteria include its AEC-Q101 qualification, tight ±2.7% VZ tolerance, low thermal resistance (425 °C/W on minimal pad), and suitability for automotive body control modules requiring PPAP-capable components.
Technical Context
This device operates in reverse-biased breakdown mode to maintain precise DC voltage regulation under varying load and temperature conditions. Its zener voltage exhibits a positive temperature coefficient (~0.06 %/°C near 9.1 V), enabling predictable drift compensation in multi-device references.
Designed for surface-mount automated assembly, it uses matte tin-annealed Alloy 42 leads and green molding compound compliant with RoHS 3 and halogen-free standards. The cathode band marking provides unambiguous polarity identification during placement and inspection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.83–9.30 V at IZT = 20 mA - ensures stable regulation within ±2.7% across production lot |
| Zener Impedance (ZZT) | 8 Ω at f = 1 kHz - minimizes output voltage variation under dynamic load transients |
| Reverse Leakage (IR) | <0.5 µA at VR = 7.0 V - preserves low quiescent current in battery-powered sensing nodes |
| Power Dissipation | 294 mW at TA = +25°C on minimal pad - defines maximum continuous DC power in space-constrained layouts |
| Thermal Resistance (RθJA) | 425 °C/W - requires careful PCB copper area planning to avoid junction overheating above 125°C ambient |
| Operating Temperature | −65 to +150 °C - supports under-hood automotive environments without derating |
| AEC-Q101 Qualified | Yes - validated for automotive applications with change control, PPAP documentation, and IATF16949 manufacturing |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 1.55 mm × 2.65 mm × 1.05 mm (L × W × H); moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to system ground or lower-potential rail; forms return path for zener current |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 9.1 V reference when reverse biased; marked by visible band on package |
Key Features
| Feature | Design Value |
|---|---|
| Tight VZ tolerance | ±2.7% (8.83–9.30 V) enables single-diode reference accuracy without trimming resistors |
| AEC-Q101 qualification | Validated for automotive use with full PPAP support and IATF16949 traceability |
| Green construction | Halogen- and antimony-free molding compound (<900 ppm Br+Cl, <1000 ppm Sb) meets global environmental mandates |
| Low-profile SOD123 | 1.05 mm height allows placement beneath connectors or in stacked PCB assemblies |
| Matte tin annealed leads | Ensures reliable solder wetting and intermetallic formation on ENIG and OSP finishes |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for LIN bus transceiver biasing and microcontroller ADC reference in door module ECUs. IC Role / Device Role / Timing Role: Precision voltage reference providing stable 9.1 V to analog front-end circuitry. Use Value: Maintains ADC linearity and LIN signal integrity across −40 to +125°C ambient with no calibration required. |
Use Scenario: Clamping and biasing thermistor bridge outputs in HVAC temperature sensors. IC Role / Device Role / Timing Role: Zener clamp limiting op-amp input swing to protect against ESD-induced overvoltage. Use Value: Prevents op-amp saturation during transient events while preserving 12-bit measurement resolution. |
| USB-C Power Delivery Feedback | Medical Patient Monitor Reference |
Use Scenario: Setting feedback threshold in secondary-side voltage regulation of 20 V USB-PD adapters. IC Role / Device Role / Timing Role: Zener reference establishing error amplifier trip point for isolated flyback controllers. Use Value: Enables ±1% output voltage accuracy despite transformer winding ratio tolerances and optocoupler CTR variation. |
Use Scenario: Providing excitation voltage for strain-gauge bridges in portable blood pressure cuffs. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source powering Wheatstone bridge networks. Use Value: Reduces offset drift to <5 µV/°C, meeting IEC 60601-1 accuracy requirements for Class II devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1LT1G | ±5% VZ tolerance (8.65–9.55 V), 15 Ω ZZT, SOT-23 package | Larger footprint mismatch; higher impedance limits high-frequency noise rejection | Select only if SOT-23 board real estate is constrained and ±5% regulation is acceptable |
| MMSZ4687T1G | ±5% VZ (8.65–9.55 V), 10 Ω ZZT, SOD-123 but non-automotive qualified | Lacks AEC-Q101 certification and PPAP documentation; not approved for automotive BOMs | Acceptable for industrial prototypes but requires requalification for production automotive programs |
Compared with DDZ9V1CQ-7, BZX84-C9V1LT1G trades tighter tolerance and automotive compliance for smaller package size, while MMSZ4687T1G offers similar form factor but lacks change control and reliability validation needed for Tier 1 automotive supply chains.
Availability
DDZ9V1CQ-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C power delivery systems, and medical monitoring equipment requiring stable component supply with full traceability and lifecycle management.
Supply support for DDZ9V1CQ-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.
This device belongs to the DDZ series of precision Zener diodes engineered specifically for AEC-Q101-compliant automotive subsystems where voltage reference stability, long-term reliability, and process-controlled manufacturing are mandatory.
FAQ
What is the maximum continuous zener current for DDZ9V1CQ-7 at 85°C ambient?
At TA = 85°C, the derated power dissipation is 320 mW (per Figure 1, Note 8). With VZ ≈ 9.1 V, the maximum continuous zener current is approximately 35 mA. Exceeding this risks thermal runaway due to rising junction temperature beyond 150°C.
Does DDZ9V1CQ-7 require external series resistance in typical voltage reference applications?
Yes - a current-limiting resistor is mandatory to set IZ within 1–20 mA range. For 12 V input and 9.1 V output, a 220 Ω resistor delivers ~13 mA, balancing regulation accuracy and power loss. Omitting it risks exceeding 294 mW rating under worst-case input conditions.
How does the cathode band orientation align with SOD123 mechanical drawings?
The cathode band is located at the end of the package corresponding to the "E" dimension side (2.55–2.85 mm width) in the official SOD123 outline. When viewed from top with marking code "YS" visible, the band is on the left edge - matching Diodes' standard SOD123 polarity convention used across all DDZ-Q variants.
Can DDZ9V1CQ-7 replace DDZ9V1BQ-7 in existing designs?
Yes - both share identical SOD123 package, AEC-Q101 qualification, and operating temperature range. DDZ9V1CQ-7 offers tighter VZ (±2.7% vs ±3.2%) and lower ZZT (8 Ω vs 8 Ω, same spec), making it a direct upgrade with improved regulation accuracy and noise immunity without layout changes.
DDZ9V1CQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±2.5%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 7 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
DDZ9V1CQ-7 FAQ
1.How can I place an order for DDZ9V1CQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9V1CQ-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 DDZ9V1CQ-7 reliable?
The price and inventory of DDZ9V1CQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9V1CQ-7 is usually 5 days.
3.What payment methods are accepted for DDZ9V1CQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9V1CQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9V1CQ-7?
DDZ9V1CQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9V1CQ-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 DDZ9V1CQ-7?
For technical support, including DDZ9V1CQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9V1CQ-7 requirements.
6.How does Aetrix verify that DDZ9V1CQ-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9V1CQ-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 DDZ9V1CQ-7 meets industry standards.
7.What is the process for return or replacement of DDZ9V1CQ-7?
All DDZ9V1CQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9V1CQ-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 DDZ9V1CQ-7 part is unused and in its original packaging.
Return procedure for DDZ9V1CQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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