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Diodes Incorporated DDZ30DSF-7
- Part No.:
- DDZ30DSF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ30DSF-7.pdf
- Description:
- DIODE ZENER 29.77V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:5,615
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Product details
Overview
DDZ30DSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage 29.02–30.51 V at 5 mA test current, 80 Ω maximum zener impedance at 1 kHz, and ±0.07 µA reverse leakage at 27.6 V. It operates across –65°C to +150°C and is packaged in SOD323F for high-density PCB layouts in voltage reference and overvoltage protection circuits.
For engineers reviewing the DDZ30DSF-7 datasheet, DDZ30DSF-7 pinout, DDZ30DSF-7 application, or DDZ30DSF-7 equivalent, this part is selected for stable low-power voltage regulation where tight VZ tolerance (±2.5%), low thermal resistance (250°C/W), and AEC-Q200-compatible manufacturing are required in automotive body electronics and industrial sensor signal conditioning.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining a stable reference voltage by operating in reverse breakdown. Its 5 mA zener test current and 80 Ω dynamic impedance ensure predictable regulation under moderate load variations.
The device uses a planar epitaxial construction with a cathode band marking, optimized for automated placement on FR-4 PCBs. Its thermal resistance of 250°C/W (measured on 10 mm × 10 mm pad) defines power derating above +25°C ambient, per Figure 1 in DS31987 Rev. 23-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 29.02–30.51 V @ IZT = 5 mA - defines regulated output range for reference design |
| Zener Impedance (ZZT) | ≤80 Ω @ f = 1 kHz - limits output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | ≤0.07 µA @ VR = 27.6 V - ensures minimal quiescent current in standby mode |
| Power Dissipation (PD) | 500 mW on FR-4 PCB - sets maximum continuous DC power handling at TA = 25°C |
| Thermal Resistance (RθJA) | 250°C/W - determines junction temperature rise per watt dissipated on standard layout |
| Operating Temperature | –65°C to +150°C - supports under-hood automotive and industrial control environments |
| Package | SOD323F - 1.25 mm × 1.70 mm footprint with 0.40 mm profile for space-constrained designs |
Pinout & Package
Package: SOD323F - molded plastic, halogen- and antimony-free "Green" compound (UL 94V-0), matte tin annealed terminals over copper alloy leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground when used as shunt regulator; forms low-impedance return path |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Connected to regulated rail; voltage develops across cathode-to-anode during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±2.5% (29.02–30.51 V range) enables accurate voltage references without trimming |
| Low zener impedance | ≤80 Ω at 1 kHz ensures <10 mV output shift under 0.8 mA load step |
| High-temperature operation | Rated to +150°C junction temperature supports engine control unit (ECU) and motor drive applications |
| Automated assembly compatibility | SOD323F package with defined pad layout (X = 0.71 mm, Y = 0.403 mm) ensures reliable pick-and-place yield |
| Environmental compliance | Fully RoHS 3 compliant, halogen- and antimony-free per Diodes' Green definition (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Regulating reference voltage for LIN bus transceiver biasing and microcontroller ADC reference in door module ECUs. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 30 V supply to analog front-end circuitry. Use Value: Maintains <±10 mV drift over –40°C to +125°C ambient, ensuring consistent ADC accuracy across vehicle lifetime. |
Use Scenario: Stabilizing excitation voltage for 4–20 mA current-loop pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Precision Zener clamp establishing fixed 30 V rail for sensor bridge biasing. Use Value: Enables ≤0.1% full-scale measurement error by holding bridge voltage within ±0.05 V over 10-year operational life. |
| Medical Infusion Pump Power Monitoring | Telecom Line Card Overvoltage Protection |
|
Use Scenario: Providing reference for battery voltage monitoring circuit in portable infusion pumps requiring IEC 60601-1 compliance. IC Role / Device Role / Timing Role: Low-leakage (≤0.07 µA) Zener reference enabling >100-hour battery runtime in sleep mode. Use Value: Reduces system quiescent current by 3× versus legacy 1N4749A, extending single-cell Li-ion service life. |
Use Scenario: Clamping transient surges on -48 V telecom power rails to protect downstream DC-DC converters. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing short-duration spikes up to 500 mW peak power. Use Value: Limits rail excursion to ≤33 V during 10/1000 µs surge events, preventing converter latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C30LT1G | VZ = 28.8–31.2 V @ 5 mA; ZZT = 80 Ω; PD = 300 mW; SOT-23 package | Lower power rating reduces thermal margin in sustained 30 V regulation; smaller SOT-23 footprint increases board density | Select when board area is constrained and average power <300 mW; verify thermal relief on 2-layer PCB |
| MMSZ5256ET1G | VZ = 28.5–31.5 V @ 20 mA; ZZT = 35 Ω; PD = 500 mW; SOD-123 package | Higher test current (20 mA) yields lower dynamic impedance but requires larger bias resistor; SOD-123 has 2.3× larger footprint | Prefer for ultra-low-noise references where 35 Ω ZZT outweighs footprint penalty; avoid in high-density automotive modules |
Compared with BZX84-C30LT1G and MMSZ5256ET1G, DDZ30DSF-7 delivers tighter VZ tolerance (±2.5% vs ±5%) and superior thermal performance (250°C/W vs 350°C/W typical) on FR-4, making it optimal for automotive-grade voltage references where long-term stability and thermal resilience are critical.
Availability
DDZ30DSF-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, medical device power monitoring, and telecom line card protection requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for DDZ30DSF-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 regulation in space-constrained, thermally demanding applications, with design emphasis on tight VZ tolerance, low leakage, and AEC-Q200-aligned process control.
FAQ
What is the maximum continuous power dissipation for DDZ30DSF-7 on a standard FR-4 PCB?
The DDZ30DSF-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 size of 35 mm × 25 mm. Derating begins linearly above +25°C ambient, reaching zero at +150°C per Figure 1 in DS31987 Rev. 23-2.
How does the cathode band marking align with the SOD323F package outline?
The cathode band on DDZ30DSF-7 corresponds to the terminal labeled "K" in the SOD323F mechanical drawing - located at the top edge of the package (He dimension side) and aligned with the α1/α2 bevel angles. This matches the "Cathode Band" terminal connection specified in the Mechanical Data section of DS31987.
Is DDZ30DSF-7 qualified for automotive applications per AEC-Q200?
DDZ30DSF-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not explicitly listed as AEC-Q200 qualified in DS31987, Diodes states that parts qualified to AEC-Q200 are available upon request - contact Diodes or authorized representatives for change-controlled automotive-grade variants.
What is the typical temperature coefficient for DDZ30DSF-7 near its nominal zener voltage?
Per Figure 3 in DS31987 Rev. 23-2, the temperature coefficient for a 30 V-class Zener diode falls between +5.5 and +6.5 mV/°C. For DDZ30DSF-7 (VZ ≈ 29.76 V mid-range), the typical TC is +6.0 mV/°C, resulting in ~±18 mV drift over –40°C to +125°C ambient.
DDZ30DSF-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):
- 29.77 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 70 nA @ 27.6 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
DDZ30DSF-7 FAQ
1.How can I place an order for DDZ30DSF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ30DSF-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 DDZ30DSF-7 reliable?
The price and inventory of DDZ30DSF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ30DSF-7 is usually 5 days.
3.What payment methods are accepted for DDZ30DSF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ30DSF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ30DSF-7?
DDZ30DSF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ30DSF-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 DDZ30DSF-7?
For technical support, including DDZ30DSF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ30DSF-7 requirements.
6.How does Aetrix verify that DDZ30DSF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ30DSF-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 DDZ30DSF-7 meets industry standards.
7.What is the process for return or replacement of DDZ30DSF-7?
All DDZ30DSF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ30DSF-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 DDZ30DSF-7 part is unused and in its original packaging.
Return procedure for DDZ30DSF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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