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Diodes Incorporated DDZ2V4ASF-7
- Part No.:
- DDZ2V4ASF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ2V4ASF-7.pdf
- Description:
- DIODE ZENER 2.43V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:4,085
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Product details
Overview
DDZ2V4ASF-7 from Diodes Incorporated is a precision 2.4 V Zener diode in SOD323F package, designed for voltage regulation and reference applications with ±3.9% zener voltage tolerance (2.33–2.52 V at 10 mA), 20 Ω dynamic impedance, and 500 mW power dissipation on FR-4 PCB. It serves as a stable low-voltage reference in power supply feedback loops, sensor biasing circuits, and overvoltage protection clamps.
For engineers reviewing the DDZ2V4ASF-7 datasheet, DDZ2V4ASF-7 pinout, DDZ2V4ASF-7 application, or DDZ2V4ASF-7 equivalent, this device is selected for tight-tolerance 2.4 V regulation in space-constrained surface-mount designs requiring automotive-grade process control, RoHS-compliant lead-free construction, and J-STD-020 Level 1 moisture sensitivity handling.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal test current of 10 mA and exhibits a temperature coefficient near −2.5 mV/°C at 2.4 V, enabling predictable drift compensation in analog references. Its thermal resistance of 250 °C/W (junction-to-ambient, FR-4) defines safe operating limits under continuous DC or pulsed bias.
The SOD323F package features a cathode band marking, matte tin–annealed copper alloy terminals, and UL 94V-0 molded plastic housing. Device behavior is characterized using short-duration pulse testing to suppress self-heating effects during reverse current measurement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.33–2.52 V @ IZT = 10 mA - defines regulation window for precision 2.4 V reference design |
| Zener Impedance (ZZT) | 20 Ω @ f = 1 kHz - ensures minimal output voltage variation under load transients |
| Power Dissipation (PD) | 500 mW on FR-4 PCB - sets maximum continuous DC power limit for thermal design |
| Reverse Current (IR) | 100 µA @ VR = 1 V - quantifies leakage below breakdown, critical for low-power standby circuits |
| Thermal Resistance (RθJA) | 250 °C/W - determines junction temperature rise above ambient under specified PCB layout |
| Operating Temperature | −65 to +150 °C - supports industrial and automotive under-hood environments |
| Moisture Sensitivity | Level 1 per J-STD-020 - allows unlimited floor life without dry-pack requirements |
Pinout & Package
Package: SOD323F - ultra-small surface-mount plastic package (2.50 mm × 1.25 mm × 0.95 mm), cathode-band marked, matte tin–annealed copper alloy leads, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit common or lower-potential rail in shunt regulator configuration |
| Cathode | Reverse-biased Zener terminal / regulated output node | Provides stable 2.4 V reference when biased through current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±3.9% (2.33–2.52 V) enables accurate 2.4 V reference without trimming |
| Low dynamic impedance | 20 Ω ensures <10 mV output shift under ±1 mA load change |
| Automated assembly compatibility | SOD323F footprint and matte tin finish support high-yield reflow soldering |
| Green manufacturing compliance | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) meets automotive "Green" standards |
| Thermal performance | 250 °C/W RθJA on standard FR-4 allows 500 mW operation with ≤125 °C junction rise at 25 °C ambient |
Applications
| Power Supply Feedback | Sensor Biasing |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or buck converter feedback networks. IC Role / Device Role / Timing Role: Shunt reference providing precise 2.4 V threshold to optocoupler input or TL431 comparator. Use Value: Enables ±1% output regulation accuracy by stabilizing error amplifier reference point against line/load variation. |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or bridge sensors. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for ratiometric sensor signal conditioning. Use Value: Reduces measurement error to <0.5% full-scale by minimizing reference drift across −40 to +125 °C. |
| Overvoltage Clamp | Microcontroller Reset Circuit |
|
Use Scenario: Protecting I/O pins or ADC inputs from transient overvoltage events. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 2.52 V maximum during ESD or surge events. Use Value: Prevents latch-up or damage in 3.3 V logic interfaces by clamping spikes within 10 ns response time. |
Use Scenario: Generating clean, temperature-stable reset signal for microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Reference element in RC-based reset generator with hysteresis. Use Value: Ensures reliable reset assertion at 2.4 V ±3.9%, eliminating false resets due to supply ripple or noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C2V4LT1G | 2.2–2.6 V range (±8.3%), 60 Ω ZZT, SOT-23 package | Higher tolerance and impedance reduce regulation accuracy in precision feedback | Select when cost sensitivity outweighs 2.4 V stability requirements and SOT-23 board space is available |
| MMSZ4676T1G | 2.37–2.47 V range (±2.1%), 30 Ω ZZT, SOD-123 package | Larger SOD-123 footprint increases PCB area; higher thermal resistance (350 °C/W) | Choose when tighter 2.4 V tolerance is mandatory and thermal derating allows 350 mW max on same PCB |
Compared with BZX84-C2V4LT1G and MMSZ4676T1G, DDZ2V4ASF-7 delivers superior 2.4 V regulation accuracy and lower dynamic impedance in the smallest footprint, making it optimal for high-density, thermally constrained 2.4 V reference designs where ±3.9% tolerance and 20 Ω impedance are required.
Availability
DDZ2V4ASF-7 is available at Aetrix Electronics and suitable for power supply feedback networks, sensor biasing circuits, overvoltage clamps, and microcontroller reset generators requiring stable component supply with automotive-grade process control and green material compliance.
Supply support for DDZ2V4ASF-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, energy-efficient components for industrial, automotive, and consumer markets.
This device belongs to the DDZxx(x)xSF precision Zener series, engineered for tight-tolerance voltage referencing in compact, automated-assembly-ready packages with full RoHS and automotive process compliance.
FAQ
What is the maximum continuous Zener current for DDZ2V4ASF-7 at 25°C ambient?
The device supports up to 208 mA continuous Zener current at 25°C ambient when mounted on a standard FR-4 PCB with 10 mm × 10 mm copper pad, calculated from PD = 500 mW and VZ ≈ 2.4 V. Derating begins above 25°C per the published power derating curve (0.6 mW/°C reduction beyond 25°C).
Does DDZ2V4ASF-7 meet AEC-Q101 qualification for automotive use?
No - DDZ2V4ASF-7 is not AEC-Q101 qualified. While manufactured in IATF 16949 certified facilities and suitable for automotive applications requiring PPAP-capable change control, formal AEC-Q101 stress testing is not performed on this part number per Diodes' product definitions documentation.
How does the SOD323F package affect thermal performance compared to SOD-123?
The SOD323F package achieves RθJA = 250 °C/W on FR-4, which is 100 °C/W better than typical SOD-123 devices (~350 °C/W). This results from optimized leadframe geometry and smaller die attach area, allowing 500 mW dissipation at lower junction temperatures under identical PCB conditions.
Can DDZ2V4ASF-7 be used in place of a 2.5 V Zener diode?
No - its guaranteed VZ range (2.33–2.52 V) does not include 2.5 V as a guaranteed minimum; the upper limit is 2.52 V at 10 mA. For true 2.5 V regulation, DDZ2V7ASF (2.54–2.75 V) or DDZ2V7BSF (2.69–2.91 V) are more appropriate alternatives with overlapping 2.5 V coverage.
DDZ2V4ASF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 2.43 V
- Tolerance:
- ±4%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 120 µA @ 1 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
DDZ2V4ASF-7 FAQ
1.How can I place an order for DDZ2V4ASF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ2V4ASF-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 DDZ2V4ASF-7 reliable?
The price and inventory of DDZ2V4ASF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ2V4ASF-7 is usually 5 days.
3.What payment methods are accepted for DDZ2V4ASF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ2V4ASF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ2V4ASF-7?
DDZ2V4ASF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ2V4ASF-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 DDZ2V4ASF-7?
For technical support, including DDZ2V4ASF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ2V4ASF-7 requirements.
6.How does Aetrix verify that DDZ2V4ASF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ2V4ASF-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 DDZ2V4ASF-7 meets industry standards.
7.What is the process for return or replacement of DDZ2V4ASF-7?
All DDZ2V4ASF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ2V4ASF-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 DDZ2V4ASF-7 part is unused and in its original packaging.
Return procedure for DDZ2V4ASF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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