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Diodes Incorporated DDZ7V5CSF-7
- Part No.:
- DDZ7V5CSF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ7V5CSF-7.pdf
- Description:
- DIODE ZENER 7.48V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:1,366
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Product details
Overview
DDZ7V5CSF-7 from Diodes Incorporated is a precision 7.5 V Zener diode in SOD323F package, designed for voltage regulation and reference applications with ±2.5% tolerance (7.29–7.67 V at 20 mA), 30 Ω dynamic impedance, and 7.5 µA reverse leakage at 4 V. It delivers stable 500 mW power dissipation on FR-4 PCBs and supports automotive-grade reliability when qualified per AEC-Q101.
For engineers reviewing the DDZ7V5CSF-7 datasheet, DDZ7V5CSF-7 pinout, DDZ7V5CSF-7 application, or DDZ7V5CSF-7 equivalent, this part serves as a low-profile, RoHS-compliant voltage reference in power supply feedback loops, overvoltage protection circuits, and analog sensor biasing where tight VZ tolerance and low thermal resistance (250 °C/W) are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 7.5 V measured at IZT = 20 mA within 40 ms to minimize self-heating effects. Its temperature coefficient is approximately +3.5 mV/°C near 7.5 V, enabling predictable drift compensation in mid-voltage references.
The device uses a silicon planar epitaxial structure with cathode band marking, optimized for automated SMT assembly on standard FR-4 boards. Its SOD323F package provides mechanical robustness, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.29–7.67 V at IZT = 20 mA - defines precise regulation window for feedback or clamping |
| Zener Impedance (ZZT) | 30 Ω at 1 kHz - ensures minimal output voltage variation under load transients |
| Power Dissipation (PD) | 500 mW on FR-4 (10 mm × 10 mm pad) - sets maximum continuous power handling in typical PCB layout |
| Reverse Leakage (IR) | 7.5 µA at VR = 4 V - guarantees low quiescent current in standby or high-impedance reference nodes |
| Thermal Resistance (RθJA) | 250 °C/W - determines junction-to-ambient temperature rise under full power operation |
| Operating Temperature | −65 to +150 °C - supports extended industrial and automotive under-hood environments |
| Package | SOD323F - 2-pin surface-mount outline with 0.004 g mass and cathode band polarity marking |
Pinout & Package
SOD323F is a two-terminal surface-mount package with cathode identified by a visible band on the top surface. The device has no internal circuitry beyond the Zener junction; terminals serve only anode and cathode roles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node in reverse-biased configuration; used for forward testing (VF = 0.9 V @ 10 mA) |
| Cathode | Zener breakdown terminal / regulated output node | Marked with band; connected to higher-potential rail to maintain stable 7.5 V reference or clamp point |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±2.5% (7.29–7.67 V) - enables accurate voltage setting without post-calibration in feedback networks |
| Low dynamic impedance | 30 Ω at 1 kHz - maintains regulation stability across varying load currents in power supplies |
| Automated assembly compatibility | SOD323F footprint with matte tin annealed terminals - ensures reliable reflow soldering and IPC-A-610 Class 2/3 compliance |
| Environmental compliance | Lead-free, halogen-free, antimony-free "Green" construction per RoHS 3 and J-STD-020 Level 1 - meets global regulatory and OEM sustainability requirements |
| Thermal performance | 250 °C/W RθJA on standard FR-4 - allows direct thermal modeling for derating in compact PCB layouts |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or buck converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Provides precise 7.5 V reference to TL431-like shunt regulator or error amplifier input. Use Value: Tight VZ tolerance minimizes output voltage deviation across line/load/temperature, improving system accuracy to ±1.5%. |
Use Scenario: Protecting microcontroller I/O pins or ADC inputs from transient overvoltage events exceeding 5.5 V. IC Role / Device Role / Timing Role: Acts as passive shunt clamp between signal line and ground, conducting above 7.5 V threshold. Use Value: Low ZZT ensures rapid clamping response and limits peak voltage to ≤8.0 V during 100 ns transients. |
| Sensor Bias Reference | Industrial Current Loop Receiver |
|
Use Scenario: Supplying stable excitation voltage to resistive temperature detectors (RTDs) or bridge sensors in 4–20 mA transmitters. IC Role / Device Role / Timing Role: Delivers low-drift 7.5 V bias to sensor Wheatstone bridge, referenced to system ground. Use Value: Predictable +3.5 mV/°C TC allows software compensation, achieving <0.1% FS error over −40 to +125 °C. |
Use Scenario: Generating local 7.5 V rail for op-amp signal conditioning stages in 4–20 mA loop-powered field instruments. IC Role / Device Role / Timing Role: Functions as series-shunt regulator in low-power auxiliary supply derived from loop current. Use Value: 500 mW rating supports up to 66 mA load at 7.5 V, sufficient for dual op-amps and ADC drivers in loop-powered designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C7V5 (ON Semiconductor) | Same 7.5 V nominal, ±5% tolerance (7.13–7.88 V), 80 Ω ZZT, SOT-23 package | Higher impedance and looser tolerance reduce regulation accuracy in precision feedback paths | Preferred where cost sensitivity outweighs regulation tightness and board space permits larger SOT-23 footprint |
| MMSZ5236B (Vishay) | 7.5 V nominal, ±5% tolerance (7.13–7.88 V), 30 Ω ZZT, SOD-123 package | Larger SOD-123 body increases thermal resistance (~300 °C/W) and reduces power density vs. SOD323F | Chosen when legacy SOD-123 footprint compatibility is required and thermal margin allows derated 350 mW operation |
Compared with BZX84-C7V5 and MMSZ5236B, DDZ7V5CSF-7 offers superior voltage accuracy and thermal efficiency in space-constrained designs, making it optimal for next-generation industrial and automotive modules requiring AEC-Q101 alignment and high-density layout.
Availability
DDZ7V5CSF-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, sensor biasing networks, and industrial current-loop receivers requiring stable component supply and long-term manufacturability.
Supply support for DDZ7V5CSF-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, automotive, and computing markets.
This device belongs to the DDZxx(x)SF precision Zener family, engineered for tight-tolerance voltage referencing in space-constrained, thermally demanding applications where RoHS-3 and AEC-Q101 readiness are essential.
FAQ
What is the maximum continuous power dissipation for DDZ7V5CSF-7 on a standard PCB?
DDZ7V5CSF-7 is rated for 500 mW continuous 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 published power derating curve, reaching zero power at +150°C.
How does the cathode band identify polarity on the SOD323F package?
The cathode band is a visible molded mark on the top surface of the SOD323F package, aligned with the cathode terminal. When viewed from the top with the band on the left, the left pad is cathode and the right pad is anode - consistent with JEDEC standard orientation for SOD-323 variants.
Is DDZ7V5CSF-7 qualified for automotive applications?
DDZ7V5CSF-7 itself is not pre-qualified to AEC-Q101, but Diodes Incorporated offers automotive-grade versions of this family (e.g., DDZ7V5CSF-7Q) with PPAP documentation, IATF 16949 manufacturing, and full AEC-Q101 stress testing. Standard DDZ7V5CSF-7 may be used in non-safety-critical automotive subsystems pending customer qualification.
What is the typical forward voltage drop at 10 mA?
The typical forward voltage drop (VF) of DDZ7V5CSF-7 is 0.9 V at IF = 10 mA and TA = +25°C. This value remains stable across the full operating temperature range (−65°C to +150°C), with minor variation (<±0.05 V) due to temperature coefficient.
DDZ7V5CSF-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):
- 7.48 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 4 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
DDZ7V5CSF-7 FAQ
1.How can I place an order for DDZ7V5CSF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ7V5CSF-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 DDZ7V5CSF-7 reliable?
The price and inventory of DDZ7V5CSF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ7V5CSF-7 is usually 5 days.
3.What payment methods are accepted for DDZ7V5CSF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ7V5CSF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ7V5CSF-7?
DDZ7V5CSF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ7V5CSF-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 DDZ7V5CSF-7?
For technical support, including DDZ7V5CSF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ7V5CSF-7 requirements.
6.How does Aetrix verify that DDZ7V5CSF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ7V5CSF-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 DDZ7V5CSF-7 meets industry standards.
7.What is the process for return or replacement of DDZ7V5CSF-7?
All DDZ7V5CSF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ7V5CSF-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 DDZ7V5CSF-7 part is unused and in its original packaging.
Return procedure for DDZ7V5CSF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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