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Diodes Incorporated DDZ30CSF-7
- Part No.:
- DDZ30CSF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ30CSF-7.pdf
- Description:
- DIODE ZENER 29.09V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:4,474
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Product details
Overview
DDZ30CSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode in SOD323F package, delivering tightly regulated 28.36–29.82V zener voltage at 5mA test current, with 55Ω maximum zener impedance and ±0.07µA reverse leakage at 26.9V, used for voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the DDZ30CSF-7 datasheet, DDZ30CSF-7 pinout, DDZ30CSF-7 application, or DDZ30CSF-7 equivalent, key selection criteria include zener voltage tolerance (±2.6%), thermal resistance (250°C/W), low leakage at rated VR, SOD323F footprint compatibility, and AEC-Q200 readiness for automotive-grade stability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and temperature conditions. Its 5mA zener test current and 55Ω dynamic impedance ensure minimal voltage deviation across operating current range.
Designed for FR-4 PCB mounting with 10mm × 10mm copper pad, it achieves 500mW power dissipation and exhibits a temperature coefficient near zero at ~30V (per Fig. 3), making it suitable for precision analog references where drift must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.36–29.82 V @ IZT = 5 mA - defines stable regulation window for feedback sensing |
| Zener Impedance (ZZT) | ≤55 Ω @ f = 1 kHz - ensures low AC ripple transmission in reference paths |
| Reverse Leakage (IR) | ≤0.07 µA @ VR = 26.9 V - guarantees minimal error current in high-impedance bias networks |
| Power Dissipation (PD) | 500 mW on FR-4 - supports continuous operation in compact power management circuits |
| Thermal Resistance (RθJA) | 250 °C/W - enables thermal-aware layout with standard 10 mm × 10 mm pad |
| Package | SOD323F - 2-pin surface-mount outline with cathode band marking and 0.004 g mass |
| Operating Temp | −65 to +150 °C - qualified for extended industrial and automotive ambient ranges |
Pinout & Package
Package: SOD323F - ultra-compact plastic molded case (2.50 mm height, 1.25 mm width, 1.70 mm length), matte tin-plated copper alloy leadframe, moisture sensitivity level 1 per J-STD-020, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node; cathode band identifies this terminal visually and in layout |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±2.6% (28.36–29.82 V) - reduces calibration overhead in closed-loop power supplies |
| Low dynamic impedance | 55 Ω max - maintains regulation accuracy under transient load steps |
| Ultra-low reverse leakage | 0.07 µA @ 26.9 V - preserves accuracy in high-resistance divider networks |
| Automated assembly compatibility | SOD323F tape-and-reel (3,000 pcs/reel) - supports high-speed pick-and-place without manual handling |
| Green compliance | Halogen- and antimony-free, RoHS 3 compliant - meets global environmental mandates without performance trade-offs |
Applications
| Switching Power Supply Feedback | Automotive Body Control Module |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback path. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise threshold for TL431-type controller input. Use Value: Tight 2.6% VZ tolerance and 55Ω ZZT minimize output voltage drift across line/load/temperature. |
Use Scenario: Providing stable reference for microcontroller ADC monitoring of 12V/24V battery rail. IC Role / Device Role / Timing Role: Precision voltage clamp protecting ADC input and enabling accurate state-of-charge estimation. Use Value: −65 to +150°C operation and <0.07 µA leakage ensure reliability in under-hood environments. |
| Industrial Sensor Signal Conditioning | LED Driver Current Reference |
Use Scenario: Biasing instrumentation amplifier inputs in 4–20 mA transmitter front-ends. IC Role / Device Role / Timing Role: Low-drift voltage reference establishing common-mode level for differential signal chain. Use Value: Near-zero TC at 30V and 250°C/W RθJA prevent thermal-induced offset in sealed enclosures. |
Use Scenario: Setting reference voltage for constant-current LED driver ICs in architectural lighting. IC Role / Device Role / Timing Role: Stable shunt reference defining current-sense threshold in high-side sense configurations. Use Value: 500 mW rating and SOD323F footprint enable compact, thermally efficient designs without heatsinking. |
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-C30LT1G | Zener voltage 28.5–31.5 V (±5%), ZZT ≤ 80 Ω, PD = 300 mW, SOT-23 package | Higher voltage tolerance and lower power rating limit use in high-accuracy or high-power feedback loops | Select when cost sensitivity outweighs tight regulation needs and board space allows SOT-23 |
| MMSZ5256ET1G | Zener voltage 28.5–31.5 V (±5%), ZZT ≤ 70 Ω, PD = 500 mW, SOD-123 package | Larger SOD-123 footprint and wider VZ spread reduce layout density and reference accuracy vs. DDZ30CSF-7 | Choose only if legacy SOD-123 footprint reuse is mandatory and ±5% tolerance is acceptable |
Compared with BZX84-C30LT1G and MMSZ5256ET1G, DDZ30CSF-7 offers superior voltage accuracy (±2.6% vs. ±5%), lower dynamic impedance (55 Ω vs. ≥70 Ω), and optimized SOD323F size-making it preferred for space-constrained, high-stability applications like automotive power management and industrial feedback control.
Availability
DDZ30CSF-7 is available at Aetrix Electronics and suitable for switching power supply feedback, automotive body control modules, industrial sensor signal conditioning, and LED driver current reference requiring stable component supply across production lifecycles.
Supply support for DDZ30CSF-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 precision voltage reference applications demanding tight tolerance, low leakage, and robust thermal performance in compact surface-mount packages for power management and sensing systems.
FAQ
What is the maximum power dissipation of DDZ30CSF-7 under standard PCB conditions?
DDZ30CSF-7 delivers 500 mW 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. This rating assumes natural convection cooling and aligns with its 250°C/W junction-to-ambient thermal resistance specification.
Does DDZ30CSF-7 meet automotive qualification standards?
DDZ30CSF-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q200 in the public datasheet, Diodes Incorporated confirms it is suitable for automotive applications requiring change-controlled supply and can be qualified upon request with full test reports.
How does the zener voltage tolerance affect feedback loop accuracy in a DC-DC converter?
With a ±2.6% zener voltage tolerance (28.36–29.82 V), DDZ30CSF-7 contributes directly to output voltage error in shunt-regulated feedback paths. In a typical 30V-output flyback design, this translates to ±0.78V absolute error-enabling tighter overall regulation than ±5% alternatives when combined with low-impedance optocoupler interfaces.
Can DDZ30CSF-7 replace older DDZ30BSF in existing designs?
Yes-DDZ30CSF-7 is a direct functional upgrade to DDZ30BSF, offering identical SOD323F package, same marking code (PN), and improved zener impedance (55 Ω vs. 80 Ω). The tighter voltage range (28.36–29.82 V vs. 27.70–29.13 V) enhances regulation accuracy without layout or schematic changes.
DDZ30CSF-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):
- 29.09 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 70 nA @ 26.9 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-323F
DDZ30CSF-7 FAQ
1.How can I place an order for DDZ30CSF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ30CSF-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 DDZ30CSF-7 reliable?
The price and inventory of DDZ30CSF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ30CSF-7 is usually 5 days.
3.What payment methods are accepted for DDZ30CSF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ30CSF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ30CSF-7?
DDZ30CSF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ30CSF-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 DDZ30CSF-7?
For technical support, including DDZ30CSF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ30CSF-7 requirements.
6.How does Aetrix verify that DDZ30CSF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ30CSF-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 DDZ30CSF-7 meets industry standards.
7.What is the process for return or replacement of DDZ30CSF-7?
All DDZ30CSF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ30CSF-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 DDZ30CSF-7 part is unused and in its original packaging.
Return procedure for DDZ30CSF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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