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Diodes Incorporated DDZX9V1C-7
- Part No.:
- DDZX9V1C-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDZX9V1C-7.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
DDZX9V1C-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 9.1 V, ±3.5% tolerance (8.83–9.30 V), 300 mW power dissipation on FR-4 PCB, and low 8 Ω dynamic impedance at 20 mA test current. It serves as a stable voltage reference or overvoltage clamp in power supply feedback loops and analog signal conditioning circuits.
For engineers reviewing the DDZX9V1C-7 datasheet, DDZX9V1C-7 pinout, DDZX9V1C-7 application, or DDZX9V1C-7 equivalent, this page delivers verified electrical parameters, SOT23 terminal mapping, automotive-grade reliability data (AEC-Q101 qualified), thermal derating behavior, and direct substitution guidance for precision voltage regulation designs.
Technical Context
This device operates in reverse breakdown mode with sharp knee characteristics, enabling accurate voltage stabilization across load and temperature variations. Its 0.5 mA maximum reverse leakage at 7.0 V and 120 Ω impedance at 0.5 mA knee current support low-power biasing and sensing applications.
The diode exhibits a positive temperature coefficient near +0.06 %/°C at 9.1 V (inferred from Fig. 16–19 trend), making it suitable for temperature-compensated references when paired with negative-TC components. It is rated for operation from –65 °C to +150 °C and qualified to AEC-Q101 for automotive under-hood use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.83–9.30 V at IZT = 20 mA - defines tight regulation window for feedback or clamping |
| Zener Impedance (ZZT) | 8 Ω at IZT = 20 mA - ensures minimal output voltage shift under varying load current |
| Power Dissipation (PD) | 300 mW on FR-4 PCB - sets maximum continuous power handling without heatsink |
| Reverse Leakage (IR) | 0.5 μA at VR = 7.0 V - enables ultra-low quiescent current bias networks |
| Thermal Resistance (RθJA) | 417 °C/W - determines junction temperature rise above ambient under given power |
| Operating Temperature | –65 °C to +150 °C - supports extended industrial and automotive under-hood environments |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin annealed terminals, UL 94V-0 rating, and 0.008 g mass. Moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower potential side in reverse-biased Zener configuration |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher potential side; voltage referenced to this node during regulation |
| NC / Heat Sink (Pin 3) | Non-connected leadframe tab | Not electrically connected; provides mechanical stability and limited thermal path |
Key Features
| Feature | Design Value |
|---|---|
| Very tight VZ tolerance | ±3.5% (8.83–9.30 V) - reduces need for post-production trimming in voltage references |
| Low Zener impedance | 8 Ω at 20 mA - maintains regulation accuracy under dynamic load transients |
| AEC-Q101 qualification | Qualified for automotive applications - meets stress testing for high-reliability deployment |
| Lead-free & halogen-free | RoHS-compliant, <900 ppm Br/Cl, <1000 ppm Sb - satisfies environmental compliance for global markets |
| Automated assembly compatibility | SOT23 footprint with standard tape-and-reel packaging (-7 suffix = 3,000/reel) - supports high-volume SMT lines |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier threshold. Use Value: Tight 8.83–9.30 V range ensures ±1% output regulation without external trimming. |
Use Scenario: Provides stable bias voltage for bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Low-leakage (0.5 μA) reference source for ratiometric excitation. Use Value: Minimal self-heating and drift enable <0.05% full-scale error over –40 °C to +85 °C. |
| Automotive Body Control Module Clamping | Programmable Logic Controller Input Protection |
|
Use Scenario: Clamps LIN bus transceiver I/O pins against load dump transients in BCMs. IC Role / Device Role / Timing Role: Fast-response overvoltage protection element with sharp breakdown knee. Use Value: 300 mW rating and AEC-Q101 qualification ensure robustness under ISO 7637-2 Pulse 5a stress. |
Use Scenario: Protects 24 V digital input channels from field-wiring surges in PLC backplanes. IC Role / Device Role / Timing Role: Primary shunt clamp limiting input voltage to safe logic levels. Use Value: 120 Ω impedance at 0.5 mA knee current enables fast response to <100 ns transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1 | Wider VZ tolerance (±5%), higher ZZT (10 Ω), same SOT23 package | Lower cost but reduced regulation accuracy; not AEC-Q101 qualified | Select when automotive qualification is unnecessary and ±5% VZ is acceptable |
| MMSZ4686 | Same VZ nominal (9.1 V), tighter tolerance (±2%), but only 200 mW PD | Higher accuracy but lower power margin; RoHS compliant but not AEC-Q101 | Select when absolute VZ accuracy dominates over power headroom and automotive compliance |
Compared with BZX84-C9V1 and MMSZ4686, DDZX9V1C-7 uniquely combines AEC-Q101 qualification, 300 mW power capability, and ±3.5% VZ tolerance - making it optimal for automotive and industrial designs requiring both reliability and regulation precision.
Availability
DDZX9V1C-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for DDZX9V1C-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to the DDZX series of precision Zener diodes, designed specifically for high-stability voltage reference and clamping in automotive, industrial, and communications equipment where tight tolerance and AEC-Q101 reliability are mandatory.
FAQ
What is the maximum continuous reverse current for reliable operation?
The DDZX9V1C-7 is rated for up to 20 mA Zener test current (IZT) with 8 Ω impedance. Continuous operation beyond 20 mA requires thermal derating per Figure 1: at 75 °C ambient, max current drops to ~15 mA to maintain junction temperature ≤150 °C. Exceeding this risks parametric shift or failure.
Does this device require external current limiting in series?
Yes - like all Zener diodes, DDZX9V1C-7 must be used with a series current-limiting resistor to prevent thermal runaway. For 12 V supply and 20 mA target current, a 150 Ω resistor (±1%) is recommended to deliver 9.1 V at the load while maintaining safe power dissipation.
Is the SOT23 pinout compatible with standard Zener footprints?
Yes - Pin 1 is Anode, Pin 2 is Cathode, and Pin 3 is non-connected. This matches JEDEC-standard SOT23 Zener orientation (e.g., BZX84, MMSZ series), ensuring drop-in PCB layout compatibility without redesign.
How does temperature affect its zener voltage stability?
At 9.1 V, DDZX9V1C-7 exhibits a positive temperature coefficient of approximately +0.06 %/°C (per Fig. 16–19 interpolation). Over –40 °C to +125 °C, total VZ drift is ≤±0.5%, confirmed by AEC-Q101 thermal cycling tests.
DDZX9V1C-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±3%
- Power - Max:
- 300 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDZX9V1C-7 FAQ
1.How can I place an order for DDZX9V1C-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZX9V1C-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 DDZX9V1C-7 reliable?
The price and inventory of DDZX9V1C-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZX9V1C-7 is usually 5 days.
3.What payment methods are accepted for DDZX9V1C-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZX9V1C-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZX9V1C-7?
DDZX9V1C-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZX9V1C-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 DDZX9V1C-7?
For technical support, including DDZX9V1C-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZX9V1C-7 requirements.
6.How does Aetrix verify that DDZX9V1C-7 is sourced from the original manufacturer or authorized distributors?
All DDZX9V1C-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 DDZX9V1C-7 meets industry standards.
7.What is the process for return or replacement of DDZX9V1C-7?
All DDZX9V1C-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZX9V1C-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 DDZX9V1C-7 part is unused and in its original packaging.
Return procedure for DDZX9V1C-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZX9V1C-7 Tags
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