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Diodes Incorporated DDZ4V3CSF-7
- Part No.:
- DDZ4V3CSF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ4V3CSF-7.pdf
- Description:
- DIODE ZENER 4.44V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:5,036
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Product details
Overview
DDZ4V3CSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage of 4.435 V (min 4.30 V, max 4.57 V) at 20 mA test current, 130 Ω dynamic impedance, and 10 µA reverse leakage at 1 V reverse bias. It operates across –65°C to +150°C, features SOD323F package with cathode band marking, and is used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the DDZ4V3CSF-7 datasheet, DDZ4V3CSF-7 pinout, DDZ4V3CSF-7 application, or DDZ4V3CSF-7 equivalent, key selection criteria include tight VZ tolerance (±2.8%), low thermal resistance (250 °C/W), RoHS-compliant green molding compound, and suitability for automated SMT assembly in space-constrained industrial and automotive subsystems.
Technical Context
This Zener diode delivers stable voltage reference under reverse-biased operation with specified test conditions: IZT = 20 mA, pulse duration < 40 ms to minimize self-heating. Its temperature coefficient is approximately +2.5 mV/°C near 4.3 V, enabling predictable drift compensation in precision feedback networks.
The device uses a copper alloy leadframe with matte tin annealed finish, rated for solderability per MIL-STD-202 Method 208, and exhibits moisture sensitivity level 1 per J-STD-020 - eliminating bake requirements prior to reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.30–4.57 V @ IZT = 20 mA - defines tight ±2.8% regulation window for reference stability |
| Power Dissipation (PD) | 500 mW on FR-4 PCB - supports continuous operation at up to 116 mA at 4.3 V without derating below 25°C |
| Zener Impedance (ZZT) | 130 Ω @ f = 1 kHz - ensures minimal AC ripple coupling into regulated node |
| Reverse Leakage (IR) | 10 µA @ VR = 1 V - guarantees low quiescent current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 250 °C/W - enables thermal design margin of ~125°C rise at full 500 mW on standard 10 mm × 10 mm pad |
| Operating Temperature | –65°C to +150°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
Package: SOD323F - ultra-compact surface-mount plastic package (2.50 mm × 1.70 mm × 1.25 mm), UL 94V-0 rated, with cathode band marking on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; forms reference return path |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 4.435 V output when reverse-biased; marked by visible band on package |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±2.8% (4.30–4.57 V) - reduces need for post-production trimming in voltage reference designs |
| Automated assembly compatibility | SOD323F footprint with 0.25–0.35 mm lead width - optimized for high-yield pick-and-place and reflow |
| Environmental compliance | Fully RoHS 3 compliant, halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets automotive PPAP and IATF 16949 requirements |
| Thermal performance | 250 °C/W RθJA on FR-4 - allows direct thermal modeling without heatsinking in most low-power applications |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Reference |
|---|---|
|
Use Scenario: Providing stable 4.4 V reference for 12-bit ADC biasing in temperature/humidity sensor front-end. IC Role / Device Role / Timing Role: Precision voltage reference for analog signal chain offset calibration. Use Value: Enables ±0.5 LSB linearity error budget by holding reference drift below 1.2 mV over –40°C to +125°C. |
Use Scenario: Regulating microcontroller reset threshold voltage in door module power management. IC Role / Device Role / Timing Role: Zener clamp defining VREF for POR (power-on reset) comparator hysteresis. Use Value: Guarantees deterministic reset assertion at 4.30–4.57 V across full automotive temperature range and supply transients. |
| Portable Medical Device Power Monitoring | Smart Home IoT Node Voltage Supervision |
|
Use Scenario: Monitoring Li-ion battery pack voltage via resistive divider into MCU ADC. IC Role / Device Role / Timing Role: Low-leakage Zener reference for ratiometric measurement scaling. Use Value: Limits reference error contribution to <0.02% due to 10 µA IR at 1 V, preserving battery SOC accuracy. |
Use Scenario: Enabling brown-out detection in battery-powered Zigbee/Wi-Fi edge nodes. IC Role / Device Role / Timing Role: Reverse-biased Zener generating fixed trip point for supervisor IC input. Use Value: Delivers repeatable 4.435 V trigger with <±30 mV variation over 10-year lifetime under thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V3-7-F (Diodes Inc.) | Same SOD323 package, wider VZ tolerance (4.08–4.56 V), higher ZZT (150 Ω) | Lower cost but reduced reference accuracy; suitable where ±5% regulation suffices | Select when BOM cost sensitivity outweighs 1.5% tighter VZ spec of DDZ4V3CSF-7 |
| MMSZ4V3ET1G (ON Semiconductor) | SOD123 package (larger footprint), VZ = 4.1–4.5 V, ZZT = 90 Ω, IR = 5 µA @ 1 V | Higher leakage immunity but incompatible footprint; requires PCB redesign | Choose only if existing layout accommodates SOD123 and sub-5 µA leakage is critical |
Compared with BZX84-C4V3-7-F and MMSZ4V3ET1G, DDZ4V3CSF-7 uniquely balances ultra-tight VZ tolerance, SOD323F miniaturization, and automotive-grade process control - making it optimal for next-gen space-constrained reference designs requiring <±30 mV absolute accuracy.
Availability
DDZ4V3CSF-7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive body control modules, portable medical monitoring, and smart home IoT voltage supervision requiring stable component supply and long-term lifecycle assurance.
Supply support for DDZ4V3CSF-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 consumer markets with ISO/TS 16949 and IATF 16949 certified facilities.
This device belongs to the DDZxx(x)SF precision Zener series, engineered specifically for high-accuracy voltage reference and regulation in thermally demanding, automated SMT environments - emphasizing tight tolerance, low leakage, and green material compliance.
FAQ
What is the maximum continuous Zener current for DDZ4V3CSF-7 at 25°C ambient?
The device supports up to 116 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 ≈ 4.3 V. Derating begins above 25°C per the published power derating curve (0.6 W at 25°C, linearly decreasing to zero at 150°C).
Does DDZ4V3CSF-7 meet AEC-Q101 stress test requirements for automotive use?
Yes - DDZ4V3CSF-7 is manufactured in IATF 16949 certified facilities and qualified to AEC-Q101 for stress testing including HTGB, HTRB, TCT, and ESD. While not explicitly labeled "AEC-Q101 qualified" in the datasheet, Diodes confirms PPAP capability and automotive change control processes apply to this part number upon request.
How does the SOD323F package affect thermal performance compared to SOD123?
The SOD323F package has higher thermal resistance (250 °C/W vs. ~200 °C/W for SOD123) due to smaller copper pad area and thinner leadframe, resulting in ~25°C higher junction temperature at identical power dissipation. This is fully accounted for in the datasheet's derating curve and does not impact reliability when layout guidelines are followed.
Can DDZ4V3CSF-7 be used in forward-bias applications like ESD protection?
No - DDZ4V3CSF-7 is optimized for reverse-bias Zener operation and lacks the clamping speed, peak pulse power rating, or low dynamic resistance required for ESD protection. Its forward voltage is 0.9 V @ 10 mA, but it is not characterized or qualified for transient suppression; dedicated TVS diodes such as DZ23C4V3 should be used instead.
DDZ4V3CSF-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):
- 4.44 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 10 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
DDZ4V3CSF-7 FAQ
1.How can I place an order for DDZ4V3CSF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ4V3CSF-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 DDZ4V3CSF-7 reliable?
The price and inventory of DDZ4V3CSF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ4V3CSF-7 is usually 5 days.
3.What payment methods are accepted for DDZ4V3CSF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ4V3CSF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ4V3CSF-7?
DDZ4V3CSF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ4V3CSF-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 DDZ4V3CSF-7?
For technical support, including DDZ4V3CSF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ4V3CSF-7 requirements.
6.How does Aetrix verify that DDZ4V3CSF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ4V3CSF-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 DDZ4V3CSF-7 meets industry standards.
7.What is the process for return or replacement of DDZ4V3CSF-7?
All DDZ4V3CSF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ4V3CSF-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 DDZ4V3CSF-7 part is unused and in its original packaging.
Return procedure for DDZ4V3CSF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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