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Diodes Incorporated DDZ9V1CS-7
- Part No.:
- DDZ9V1CS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
DDZ9V1CS-7.pdf
- Description:
- DIODE ZENER 9.07V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:47,275
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Product details
Overview
DDZ9V1CS-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 8.83–9.30 V at 20 mA, 8 Ω dynamic impedance at 20 mA, 0.5 µA reverse leakage at 7.0 V, and 200 mW power dissipation in SOD323 package. It serves as a stable voltage reference in low-power analog circuits, power supply feedback loops, and overvoltage protection clamping networks.
For engineers reviewing the DDZ9V1CS-7 datasheet, DDZ9V1CS-7 pinout, DDZ9V1CS-7 application, or DDZ9V1CS-7 equivalent, this page delivers verified electrical specs, thermal derating behavior, polarity marking, SOD323 footprint compatibility, and direct alternatives for voltage reference design validation.
Technical Context
This Zener diode operates in reverse breakdown mode with sharp knee characteristics and tight ±2.5% VZ tolerance (4.94–5.20 V to 8.83–9.30 V across series). Its 8 Ω zener impedance at 20 mA ensures minimal output voltage variation under load current changes.
Designed for automated SMT assembly, it features matte tin–annealed terminals, J-STD-020 Level 1 moisture sensitivity, and UL 94V-0 molded plastic case. Thermal resistance is 625 °C/W on FR-4 board with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.83–9.30 V @ IZT = 20 mA - defines stable regulation point for feedback or reference use |
| Zener Impedance (ZZT) | 8 Ω @ 20 mA - low dynamic resistance minimizes output ripple in precision references |
| Reverse Leakage (IR) | 0.5 µA @ VR = 7.0 V - ensures negligible error current in high-impedance bias networks |
| Power Dissipation (PD) | 200 mW - sets maximum continuous DC power handling before thermal derating applies |
| Thermal Resistance (RθJA) | 625 °C/W - determines junction temperature rise above ambient per watt dissipated |
| Operating Temperature | −65 to +150 °C - supports industrial and automotive under-hood environments |
Pinout & Package
Package: SOD323 - ultra-small surface-mount plastic case (1.30 mm × 1.70 mm × 0.95 mm), cathode marked by band, polarity critical for correct reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower potential side in reverse-bias configuration; used for bias current return path |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher potential side; delivers stable VZ when reverse biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp breakdown knee | Enables precise turn-on at VZ, reducing transition uncertainty in clamp or reference applications |
| Tight VZ tolerance (±2.5%) | Minimizes unit-to-unit variation in voltage-sensitive circuits without post-calibration |
| Low leakage (0.5 µA @ 7 V) | Preserves accuracy in high-resistance divider networks and battery-powered systems |
| SOD323 footprint compatibility | Supports high-density PCB layouts and standard pick-and-place equipment with no adapter needed |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived DC/DC converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference providing stable setpoint for TL431-like control ICs or comparator-based regulation. Use Value: Tight 8.83–9.30 V range enables accurate 12 V or 9 V rail regulation with <±1% output error under line/load variation. |
Use Scenario: Protecting microcontroller I/O pins or ADC inputs from transient overvoltage events exceeding 9 V. IC Role / Device Role / Timing Role: Shunt clamping element that conducts excess current above breakdown threshold to limit voltage excursion. Use Value: 8 Ω ZZT ensures rapid voltage stabilization during ESD or surge events, limiting peak clamped voltage to ≤9.5 V at 100 mA. |
| Reference Voltage Source | Current Source Bias |
|
Use Scenario: Generating stable bias for op-amp input stages, sensor excitation, or DAC reference buffers in portable instrumentation. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference replacing larger TO-92 or SOT-23 Zeners where space is constrained. Use Value: 0.5 µA leakage and 625 °C/W RθJA allow stable 9.1 V reference in thermally isolated locations with <0.1% drift over −40 to +85 °C. |
Use Scenario: Establishing constant current through LEDs, phototransistors, or sensing resistors using simple two-terminal configuration. IC Role / Device Role / Timing Role: Active current-setting element in cascode or emitter-degeneration topologies. Use Value: Sharp breakdown and 200 mW rating support 22 mA constant current (9.1 V / 410 Ω) with <2% variation across temperature and supply shifts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1 (ON Semiconductor) | VZ = 8.65–9.55 V @ 5 mA; ZZT = 15 Ω; 250 mW rating; SOT-23 package | Larger footprint and higher impedance reduce suitability for space-constrained, low-noise references | Prefer when higher power margin or legacy SOT-23 board compatibility is required |
| MMSZ5240B (Vishay) | VZ = 8.7–9.3 V @ 20 mA; ZZT = 10 Ω; 500 mW rating; SOD-123 package | Higher power rating but 0.4 mm taller profile limits ultra-thin designs | Choose when thermal headroom >200 mW is needed or existing SOD-123 land pattern exists |
Compared with BZX84-C9V1 and MMSZ5240B, DDZ9V1CS-7 offers the smallest footprint (SOD323), lowest zener impedance (8 Ω), and tightest VZ tolerance in its class-making it optimal for miniaturized, high-accuracy voltage reference nodes where board area and regulation stability are critical.
Availability
DDZ9V1CS-7 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and reference voltage source applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for DDZ9V1CS-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 device belongs to the DDZxxS precision Zener family, engineered specifically for high-accuracy voltage referencing in compact, automated-assembly environments-emphasizing tight tolerance, low leakage, and SMT process robustness.
FAQ
What is the maximum continuous reverse current for reliable operation?
The DDZ9V1CS-7 is rated for 20 mA test current (IZT) and supports continuous reverse current up to 22 mA at 25 °C ambient, assuming 200 mW power limit and proper PCB thermal relief. Derating begins linearly above 25 °C per the 625 °C/W RθJA curve.
Does this Zener diode have a specified temperature coefficient?
Yes-Figure 12–15 in DS30414 show typical TC of VZ vs. nominal voltage. For DDZ9V1CS-7 (9.1 V nominal), TC is approximately +0.06 %/°C at IZT = 5 mA, indicating positive drift with temperature, consistent with mid-voltage Zeners.
Can DDZ9V1CS-7 replace a 9.1 V through-hole Zener like 1N4739A?
No-it is not a drop-in replacement due to different package (SOD323 vs. DO-41), power rating (200 mW vs. 1 W), and thermal behavior. While VZ ranges overlap, PCB layout, thermal design, and surge capability differ significantly; redesign is required.
Is the SOD323 package compatible with standard reflow profiles?
Yes-the device is qualified for lead-free reflow per J-STD-020, with Moisture Sensitivity Level 1 (unlimited floor life), and withstands peak temperatures up to 260 °C. Standard Pb-free reflow profiles with ramp rates ≤3 °C/s and soak at 150–200 °C for 60–120 s are appropriate.
DDZ9V1CS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.07 V
- Tolerance:
- ±3%
- Power - Max:
- 200 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:
- SOD-323
DDZ9V1CS-7 FAQ
1.How can I place an order for DDZ9V1CS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9V1CS-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 DDZ9V1CS-7 reliable?
The price and inventory of DDZ9V1CS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9V1CS-7 is usually 5 days.
3.What payment methods are accepted for DDZ9V1CS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9V1CS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9V1CS-7?
DDZ9V1CS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9V1CS-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 DDZ9V1CS-7?
For technical support, including DDZ9V1CS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9V1CS-7 requirements.
6.How does Aetrix verify that DDZ9V1CS-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9V1CS-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 DDZ9V1CS-7 meets industry standards.
7.What is the process for return or replacement of DDZ9V1CS-7?
All DDZ9V1CS-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9V1CS-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 DDZ9V1CS-7 part is unused and in its original packaging.
Return procedure for DDZ9V1CS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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