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Diodes Incorporated DDZ11CSF-7
- Part No.:
- DDZ11CSF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ11CSF-7.pdf
- Description:
- DIODE ZENER 11.1V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:1,483
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Product details
Overview
DDZ11CSF-7 from Diodes Incorporated is a 0.5W surface-mount precision Zener diode in SOD323F package, delivering tightly regulated 10.82–11.38 V zener voltage at 10 mA test current, with 30 Ω max zener impedance and only 0.07 µA reverse leakage at 9.22 V, used for voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the DDZ11CSF-7 datasheet, DDZ11CSF-7 pinout, DDZ11CSF-7 application, or DDZ11CSF-7 equivalent, key selection criteria include zener voltage tolerance (±2.5% typical), thermal resistance (250 °C/W), low leakage performance, and SOD323F footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and temperature conditions. Its 10 mA zener test current and 30 Ω dynamic impedance ensure predictable regulation across industrial ambient temperatures (−65 °C to +150 °C).
The device uses a planar epitaxial construction with cathode band marking, optimized for automated pick-and-place assembly. Its 250 °C/W junction-to-ambient thermal resistance is specified for FR-4 PCBs with 10 mm × 10 mm copper pads, enabling reliable 500 mW power dissipation without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.82–11.38 V @ IZT = 10 mA - defines precise regulation window for feedback sensing |
| Max Zener Impedance | 30 Ω @ f = 1 kHz - ensures minimal output voltage variation under dynamic load changes |
| Reverse Leakage Current | 0.07 µA @ VR = 9.22 V - enables ultra-low quiescent current in battery-backed circuits |
| Power Dissipation | 500 mW on FR-4 - supports robust operation in compact power management stages |
| Thermal Resistance | 250 °C/W (Junction-to-Ambient) - determines safe operating area with standard PCB copper layout |
| Operating Temperature | −65 °C to +150 °C - qualified for extended-range industrial and automotive under-hood environments |
Pinout & Package
Package: SOD323F - ultra-compact surface-mount plastic package (2.50 mm × 1.70 mm × 1.25 mm), halogen- and antimony-free, RoHS-compliant, with matte tin-plated copper alloy leadframe and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential node to enable voltage clamping/reference |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage regulation | ±2.5% typical VZ tolerance at 10 mA enables accurate feedback in SMPS error amplifiers |
| Low dynamic impedance | 30 Ω max ensures <10 mV output shift per 300 µA load step - critical for ADC reference stability |
| Ultra-low leakage | 0.07 µA @ 9.22 V minimizes error in high-impedance bias networks and sensor signal conditioning |
| Automated assembly ready | SOD323F footprint and matte tin terminations support high-yield reflow and wave soldering |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference for TL431-type shunt regulator IC input or direct comparator reference. Use Value: Tight 10.82–11.38 V range and 30 Ω impedance reduce output voltage drift to ±0.5% over line/load/temperature. |
Use Scenario: Providing stable bias voltage for bridge-based pressure or strain sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Low-drift reference source for instrumentation amplifier common-mode setting and ADC reference divider. Use Value: 0.07 µA leakage prevents offset errors in GΩ-level sensor bias paths; −65 °C to +150 °C rating supports wide-temperature field deployment. |
| Overvoltage Clamp for MCU I/O | Portable Device Battery Protection |
Use Scenario: Protecting 3.3 V or 5 V microcontroller GPIO pins against ESD and transient surges in industrial HMI panels. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 11.38 V before damage threshold of downstream logic. Use Value: 500 mW power rating absorbs 1 kV ESD pulses per IEC 61000-4-2; SOD323F size fits tight board space near connectors. |
Use Scenario: Monitoring lithium-ion cell voltage during charging/discharging in wearables and medical monitors. IC Role / Device Role / Timing Role: Reference element in discrete voltage monitor circuit triggering cutoff at 4.2 V per cell (via resistor divider scaling). Use Value: Stable VZ with <100 ppm/°C tempco (per Fig. 3) ensures ±5 mV accuracy across −20 °C to +60 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDZ11BSF-7 | VZ = 10.50–11.05 V @ 10 mA; same package and 30 Ω ZZT | Narrower regulation window - better for tighter tolerance requirements where 11.05 V max is acceptable | Select when system margin allows lower upper VZ bound and tighter distribution is prioritized |
| BZX84-C11LT1G | VZ = 10.4–11.6 V @ 5 mA; 30 Ω ZZT; SOT-23 package; 350 mW rating | Larger footprint and lower power handling - less suitable for high-current reference or compact layouts | Choose only if SOT-23 is already standardized in design and 350 mW suffices |
Compared with DDZ11CSF-7, DDZ11BSF-7 offers tighter upper VZ limit but reduced headroom, while BZX84-C11LT1G trades power capability and size for broader availability - making DDZ11CSF-7 optimal for high-accuracy, space-constrained 0.5W reference designs.
Availability
DDZ11CSF-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and portable battery monitoring systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for DDZ11CSF-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 industrial, computing, and automotive markets.
The DDZ series targets precision voltage reference applications demanding tight VZ tolerance, low leakage, and robust thermal performance in compact surface-mount packages for power management and signal conditioning.
FAQ
What is the maximum continuous power dissipation for DDZ11CSF-7?
DDZ11CSF-7 is rated for 500 mW maximum power dissipation when mounted on an FR-4 PCB with a 10 mm × 10 mm copper pad and board dimensions of 35 mm × 25 mm. Derating begins above +25 °C ambient per the curve in Figure 1, reaching zero dissipation at +150 °C.
How does the zener voltage tolerance affect circuit accuracy?
The 10.82–11.38 V range (±2.5% around nominal 11.1 V) directly sets absolute accuracy in reference applications. For example, in a 12 V SMPS feedback divider, this introduces ±0.13 V output uncertainty - mitigated by trimming or using tighter-tolerance variants like DDZ11BSF-7 if system margins allow.
Is DDZ11CSF-7 suitable for automotive applications?
DDZ11CSF-7 is not AEC-Q101 qualified out-of-box, but Diodes Incorporated offers automotive-grade versions (e.g., DDZ11CSFQ-7) with PPAP support, IATF 16949 manufacturing, and AEC-Q101 stress testing. Standard DDZ11CSF-7 is intended for industrial and commercial use.
What is the significance of the "CSF" suffix in the part number?
The "CSF" suffix denotes the third tolerance grade within the DDZxx series: "A" = widest VZ range, "B" = mid-range, "C" = tighter (±2.5% typical), and "D" = tightest. All "CSF" variants share identical SOD323F packaging, 10 mA test current, and 30 Ω max ZZT, differing only in VZ distribution bounds.
DDZ11CSF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11.1 V
- Tolerance:
- ±2.52%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
DDZ11CSF-7 FAQ
1.How can I place an order for DDZ11CSF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ11CSF-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 DDZ11CSF-7 reliable?
The price and inventory of DDZ11CSF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ11CSF-7 is usually 5 days.
3.What payment methods are accepted for DDZ11CSF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ11CSF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ11CSF-7?
DDZ11CSF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ11CSF-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 DDZ11CSF-7?
For technical support, including DDZ11CSF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ11CSF-7 requirements.
6.How does Aetrix verify that DDZ11CSF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ11CSF-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 DDZ11CSF-7 meets industry standards.
7.What is the process for return or replacement of DDZ11CSF-7?
All DDZ11CSF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ11CSF-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 DDZ11CSF-7 part is unused and in its original packaging.
Return procedure for DDZ11CSF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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