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Diodes Incorporated DDZ9V1BQ-7
- Part No.:
- DDZ9V1BQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9V1BQ-7.pdf
- Description:
- DIODE ZENER 9.1V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
DDZ9V1BQ-7 from Diodes Incorporated is an AEC-Q101 qualified surface-mount precision Zener diode in SOD123 package, delivering a nominal zener voltage of 8.79 V (typical), tight tolerance (±2.5% at IZT = 20 mA), low dynamic impedance (8 Ω at 1 kHz), and reverse current < 0.5 µA at 7.0 V - used for voltage regulation and reference in automotive power supply monitoring circuits.
For engineers reviewing the DDZ9V1BQ-7 datasheet, DDZ9V1BQ-7 pinout, DDZ9V1BQ-7 application, or DDZ9V1BQ-7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (425 °C/W on minimal pad layout), AEC-Q101 qualification status, and SOD123 footprint compatibility with high-density PCB designs.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with stable VZ across 20 mA test current and maintaining < ±0.06 %/°C temperature coefficient in its 8.57–9.01 V range. It exhibits low capacitance (≈5 pF at 1 MHz, VR = 2 V) and fast response to transient overvoltage events.
Designed for automotive-grade reliability, it features matte tin-annealed terminals on Alloy 42 leadframe, moisture sensitivity level 1 per J-STD-020, and is manufactured in IATF16949-certified facilities with PPAP capability - enabling use in engine control units and ADAS power rail supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.57–9.01 V at IZT = 20 mA - defines precise clamping threshold for 9 V rail protection |
| Zener Impedance (ZZT) | 8 Ω at f = 1 kHz - ensures minimal voltage deviation under load transients |
| Reverse Current (IR) | < 0.5 µA at VR = 7.0 V - guarantees low leakage in standby power domains |
| Power Dissipation (PD) | 294 mW at TA = +25°C (minimal pad layout) - sets maximum continuous dissipation without derating |
| Thermal Resistance (RθJA) | 425 °C/W - determines junction temperature rise in compact automotive PCB layouts |
| Operating Temperature | −65 to +150 °C - supports under-hood and transmission-control module environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress-test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 1.55 mm (D) × 2.65 mm (E) × 0.30 mm (L); weight ≈ 0.01 g; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to system GND or lower-potential rail; forms return path during regulation |
| Cathode | Zener breakdown terminal / Regulated output node | Connected to monitored voltage rail; clamps excess energy above VZ to protect downstream ICs |
Key Features
| Feature | Design Value |
|---|---|
| Tight VZ tolerance | ±2.5% at 20 mA - enables accurate voltage margining without external trimming |
| AEC-Q101 qualification | Validated for automotive applications with PPAP support - reduces qualification effort for Tier 1 suppliers |
| Low ZZT | 8 Ω - maintains regulation stability under dynamic load steps in DC-DC feedback paths |
| Green construction | Halogen- and antimony-free, RoHS 3 compliant - meets EU automotive environmental compliance mandates |
| SOD123 footprint | Standardized 2-pin SMT outline - compatible with automated pick-and-place and reflow processes |
Applications
| Engine Control Unit (ECU) Power Monitoring | ADAS Camera Module Voltage Reference |
|---|---|
Use Scenario: Real-time monitoring of 9 V auxiliary rail supplying microcontroller and sensor interfaces in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Zener diode provides stable reference for comparator-based overvoltage detection circuit. Use Value: Tight VZ tolerance ensures trip point remains within ±0.2 V across temperature, preventing false fault triggers. |
Use Scenario: Reference voltage generation for analog signal conditioning in 12 V-powered surround-view camera modules. IC Role / Device Role / Timing Role: Acts as precision shunt regulator for op-amp bias network feeding image sensor ADC. Use Value: Low 8 Ω impedance minimizes noise coupling into analog front-end, preserving SNR in low-light imaging. |
| Automotive Body Control Module (BCM) | Electric Power Steering (EPS) Sensor Biasing |
Use Scenario: Voltage clamping on LIN bus transceiver supply line exposed to load-dump transients. IC Role / Device Role / Timing Role: Fast-acting shunt element absorbing surge energy before it reaches communication IC. Use Value: 294 mW power rating with 425 °C/W RθJA allows sustained clamping without thermal runaway in confined BCM enclosures. |
Use Scenario: Providing stable 9 V bias to torque and position sensors in EPS motor control assemblies. IC Role / Device Role / Timing Role: Precision Zener establishes clean reference for ratiometric sensor excitation. Use Value: −65 to +150 °C operating range ensures reliable operation during extended hot-soak conditions under hood. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1-7-F | ±5% VZ tolerance, 15 Ω ZZT, non-AEC-Q101 | Limited to commercial-grade consumer or industrial power supplies | Select when cost sensitivity outweighs automotive qualification and tighter regulation needs |
| MMSZ5240B-TP | ±5% VZ, 17 Ω ZZT, SOD-123, no AEC-Q101 | Suitable for non-safety-critical embedded systems with less stringent thermal specs | Prefer for legacy designs where BOM reuse is prioritized over automotive compliance |
Compared with BZX84-C9V1-7-F and MMSZ5240B-TP, DDZ9V1BQ-7 delivers tighter voltage control, lower impedance, and full automotive qualification - making it the only choice for safety-relevant voltage supervision in ECU, BCM, and EPS subsystems.
Availability
DDZ9V1BQ-7 is available at Aetrix Electronics and suitable for automotive power management, ADAS sensor biasing, and body electronics requiring stable component supply with full traceability and long-term lifecycle assurance.
Supply support for DDZ9V1BQ-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 automotive-grade voltage reference and protection applications, designed specifically to meet AEC-Q101 stress requirements while maintaining precision performance in harsh thermal and electrical environments.
FAQ
What is the maximum steady-state power dissipation for DDZ9V1BQ-7 on a standard FR-4 PCB?
At TA = +25°C with minimal recommended pad layout (1× copper pad), the maximum power dissipation is 294 mW. This value drops linearly with ambient temperature per the derating curve in Figure 1 - e.g., 147 mW at +75°C ambient. Exceeding this limit risks thermal instability and accelerated parametric drift.
Is DDZ9V1BQ-7 suitable for use in a voltage reference circuit for a 12-bit ADC?
Yes - its ±2.5% VZ tolerance, low 8 Ω dynamic impedance, and < 0.5 µA leakage at 7 V enable sub-LSB error contribution in 12-bit systems referenced to 9 V. For highest accuracy, pair with a low-noise buffer amplifier and operate within −40 to +125°C to minimize TC-induced drift.
How does the SOD123 package affect thermal performance compared to SOD323?
The SOD123 package offers 30–40% lower RθJA than SOD323 due to larger copper pad area and higher thermal mass - 425 °C/W vs. ~600 °C/W typical. This allows higher continuous power handling and improved long-term stability in thermally constrained automotive modules.
Does DDZ9V1BQ-7 require external current limiting in series with the cathode?
Yes - like all Zener diodes, it requires a series current-limiting resistor to set IZ within 1–20 mA for stable regulation. For 12 V input and 9 V output, a 150 Ω ±1% resistor delivers ~20 mA at nominal conditions and limits peak current during transients per the device's 500 mW pulsed rating.
DDZ9V1BQ-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):
- 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
DDZ9V1BQ-7 FAQ
1.How can I place an order for DDZ9V1BQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9V1BQ-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 DDZ9V1BQ-7 reliable?
The price and inventory of DDZ9V1BQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9V1BQ-7 is usually 5 days.
3.What payment methods are accepted for DDZ9V1BQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9V1BQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9V1BQ-7?
DDZ9V1BQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9V1BQ-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 DDZ9V1BQ-7?
For technical support, including DDZ9V1BQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9V1BQ-7 requirements.
6.How does Aetrix verify that DDZ9V1BQ-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9V1BQ-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 DDZ9V1BQ-7 meets industry standards.
7.What is the process for return or replacement of DDZ9V1BQ-7?
All DDZ9V1BQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9V1BQ-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 DDZ9V1BQ-7 part is unused and in its original packaging.
Return procedure for DDZ9V1BQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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