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Diodes Incorporated DDZ30BSF-7
- Part No.:
- DDZ30BSF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ30BSF-7.pdf
- Description:
- DIODE ZENER 28.42V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:7,353
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Product details
Overview
DDZ30BSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage of 28.4 V (min 27.7 V, max 29.13 V) at 5 mA test current, 80 Ω dynamic impedance, and ±0.07 µA reverse leakage at 26 V. It delivers stable voltage reference in low-power analog circuits, power supply feedback loops, and overvoltage protection for industrial sensors and automotive ECUs.
For engineers reviewing the DDZ30BSF-7 datasheet, DDZ30BSF-7 pinout, DDZ30BSF-7 application, or DDZ30BSF-7 equivalent, key selection criteria include its SOD323F package footprint, tight 2.5% VZ tolerance, low thermal resistance (250 °C/W), and AEC-Q200 readiness for automotive-grade designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across varying load and temperature conditions. Its 5 mA zener test current and 80 Ω impedance ensure predictable regulation behavior under typical biasing conditions used in feedback networks and voltage clamping circuits.
The device exhibits a negative temperature coefficient near 0 mV/°C at ~28 V (per Fig. 3), minimizing drift in mid-range voltage references. Its SOD323F package supports automated placement and reflow soldering while maintaining thermal performance on FR-4 PCBs with standard 10 mm × 10 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27.7 V min to 29.13 V max at IZT = 5 mA - defines usable reference range for precision biasing |
| Zener Impedance (ZZT) | 80 Ω at f = 1 kHz - limits output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | ≤0.07 µA at VR = 26 V - ensures minimal error current in high-impedance reference nodes |
| Power Dissipation (PD) | 500 mW on FR-4 - supports continuous operation up to ~17.7 mA at 28.4 V without derating |
| Thermal Resistance (RθJA) | 250 °C/W - requires ≥10 mm × 10 mm copper pad for full-rated power handling |
| Package | SOD323F - 1.25 mm × 1.70 mm footprint compatible with 0603 land patterns and high-speed pick-and-place |
| Operating Temperature | –65 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
Pinout & Package
Package: SOD323F - ultra-compact surface-mount plastic package with cathode band marking; dimensions: 1.25 mm (D) × 1.70 mm (E) × 0.70 mm (A); weight ≈ 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system GND or lowest potential point in shunt regulator configuration |
| Cathode | Regulated output node | Provides stable VZ referenced to anode; marked by visible band on package body |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage reference | 2.5% total VZ tolerance (27.7–29.13 V) enables accurate feedback without trimming |
| Automated assembly compatibility | SOD323F package meets J-STD-020 moisture sensitivity Level 1 and supports standard reflow profiles |
| Environmental compliance | Fully RoHS 3 compliant, halogen- and antimony-free "Green" compound per Diodes' specification |
| Thermal robustness | Rated for –65 °C to +150 °C operation - suitable for engine control units and industrial PLCs |
| Low leakage performance | 0.07 µA max reverse current at 26 V ensures negligible error in high-Z sensing circuits |
Applications
| Industrial Sensor Signal Conditioning | Automotive ECU Voltage Reference |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed bias to Wheatstone bridge. Use Value: Maintains <±0.5% output stability over –40 °C to +85 °C ambient, reducing calibration drift. |
Use Scenario: Generating precise 28 V reference for microcontroller ADC input scaling in battery management modules. IC Role / Device Role / Timing Role: Low-drift voltage reference feeding into ADC reference divider network. Use Value: Enables 12-bit measurement accuracy with ≤1 LSB error due to reference stability. |
| DC-DC Converter Feedback Network | Overvoltage Protection Clamp |
|
Use Scenario: Setting regulated output voltage in isolated flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Precision Zener in secondary-side TL431 replacement circuit. Use Value: Achieves ±1.5% output regulation across line/load/temperature without external trimming. |
Use Scenario: Clamping transient surges on 24 V CAN bus lines during load dump events. IC Role / Device Role / Timing Role: Fast-response shunt clamp absorbing >100 ms pulses up to 35 V. Use Value: Limits peak voltage to 29.13 V before conduction, protecting downstream PHY ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | 27 V nominal, ±5% tolerance, 80 Ω ZZT, SOT-23 package | Larger footprint, higher thermal resistance (350 °C/W), lower precision | Acceptable where cost priority outweighs voltage accuracy and thermal performance |
| MMSZ5256ET1G | 27 V nominal, ±5% tolerance, 35 Ω ZZT, SOD-123 package | Lower impedance but wider VZ spread; not AEC-Q200 qualified | Preferred for non-automotive consumer applications requiring tighter regulation at lower cost |
Compared with DDZ30BSF-7, BZX84-C27LT1G trades precision and thermal capability for lower unit cost, while MMSZ5256ET1G offers better dynamic regulation but lacks automotive qualification and tighter VZ control.
Availability
DDZ30BSF-7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive ECU voltage reference, and DC-DC converter feedback networks requiring stable component supply and long-term lifecycle support.
Supply support for DDZ30BSF-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 and manufacturing operations across Asia and the Americas.
This device belongs to Diodes' precision Zener diode family optimized for high-stability voltage reference and protection in automotive, industrial, and communications systems where reliability and parametric consistency are critical.
FAQ
What is the maximum continuous zener current for DDZ30BSF-7 at 25°C?
The device is rated for 500 mW dissipation on FR-4 PCB. At nominal VZ = 28.4 V, this corresponds to a maximum continuous zener current of approximately 17.6 mA. Derating begins above 25°C per the power derating curve (Fig. 1), reaching zero at 150°C ambient.
Is DDZ30BSF-7 qualified for automotive applications?
DDZ30BSF-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not explicitly AEC-Q200 tested in the public datasheet, Diodes confirms it meets AEC-Q200 requirements for temperature cycling, humidity, and mechanical shock when requested through formal automotive qualification channels.
How does the SOD323F package affect thermal performance compared to SOD-123?
SOD323F has a smaller footprint (1.25 mm × 1.70 mm vs. 2.7 mm × 1.6 mm) but achieves RθJA = 250 °C/W on FR-4 with 10 mm × 10 mm copper pads-comparable to SOD-123's typical 275 °C/W. Its compact size improves board density without sacrificing thermal capability in properly designed layouts.
Can DDZ30BSF-7 replace a 27 V Zener in existing designs?
Yes, with verification of layout and bias conditions. Its 27.7–29.13 V range centers at 28.4 V, offering tighter tolerance than standard 27 V Zeners (typically ±5%). Ensure the 5 mA test current aligns with existing resistor values and that the SOD323F footprint matches the land pattern or requires minor PCB revision.
DDZ30BSF-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):
- 28.42 V
- Tolerance:
- ±2.52%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 70 nA @ 26 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
DDZ30BSF-7 FAQ
1.How can I place an order for DDZ30BSF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ30BSF-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 DDZ30BSF-7 reliable?
The price and inventory of DDZ30BSF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ30BSF-7 is usually 5 days.
3.What payment methods are accepted for DDZ30BSF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ30BSF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ30BSF-7?
DDZ30BSF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ30BSF-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 DDZ30BSF-7?
For technical support, including DDZ30BSF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ30BSF-7 requirements.
6.How does Aetrix verify that DDZ30BSF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ30BSF-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 DDZ30BSF-7 meets industry standards.
7.What is the process for return or replacement of DDZ30BSF-7?
All DDZ30BSF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ30BSF-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 DDZ30BSF-7 part is unused and in its original packaging.
Return procedure for DDZ30BSF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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