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Diodes Incorporated DDZ24ASF-7
- Part No.:
- DDZ24ASF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ24ASF-7.pdf
- Description:
- DIODE ZENER 22.62V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:5,404
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Product details
Overview
DDZ24ASF-7 from Diodes Incorporated is a precision 24 V Zener diode in SOD323F package, designed for voltage regulation and reference applications with ±2.3% zener voltage tolerance (22.05–23.18 V at 5 mA), 60 Ω dynamic impedance, and 0.07 µA reverse leakage at 20.9 V. It delivers stable 500 mW power dissipation on FR-4 PCBs and supports automotive-grade thermal operation from –65 °C to +150 °C.
For engineers reviewing the DDZ24ASF-7 datasheet, DDZ24ASF-7 pinout, DDZ24ASF-7 application, or DDZ24ASF-7 equivalent, key selection criteria include tight VZ tolerance, low temperature coefficient, SOD323F footprint compatibility, and AEC-Q200 readiness for industrial power supply and sensor reference circuits.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable output by conducting reverse current above its specified breakdown threshold. Its 5 mA test current ensures consistent VZ measurement under standardized conditions, while the 60 Ω zener impedance defines load regulation sensitivity in feedback loops.
The SOD323F package enables high-density placement and automated reflow assembly, with a 250 °C/W junction-to-ambient thermal resistance measured on a defined 10 mm × 10 mm copper pad. Its cathode band marking and matte tin–plated terminals ensure unambiguous polarity identification and MIL-STD-202 compliant solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.05–23.18 V at IZT = 5 mA - defines precise regulation window for 24 V rail stabilization |
| Power Dissipation (PD) | 500 mW on FR-4 - supports continuous operation in compact power management stages |
| Zener Impedance (ZZT) | 60 Ω at f = 1 kHz - determines output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | 0.07 µA at VR = 20.9 V - ensures minimal quiescent current in battery-backed reference circuits |
| Thermal Resistance (RθJA) | 250 °C/W - sets maximum ambient temperature limit for full-power operation on standard PCB |
| Operating Temperature | –65 °C to +150 °C - enables use in under-hood automotive and industrial control environments |
| Package | SOD323F - 1.25 mm × 1.70 mm surface-mount outline compatible with 0402-class layout rules |
Pinout & Package
Package: SOD323F - ultra-compact plastic-molded case with cathode band marking; dimensions: 1.25 mm (D) × 1.70 mm (E) × 0.68 mm (A typ); weight ≈ 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to system ground or lower-potential rail in shunt regulator configuration |
| Cathode | Reverse-biased Zener terminal / regulated output node | Provides stable 24 V reference when biased above breakdown; marked with visible band |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±2.3% (22.05–23.18 V) - reduces need for external trimming in voltage reference designs |
| Low dynamic impedance | 60 Ω at 1 kHz - improves line and load regulation in feedback networks |
| Automated assembly compatibility | SOD323F footprint with matte tin annealed terminals - ensures reliable reflow soldering per J-STD-020 Level 1 |
| Environmental compliance | Fully RoHS 3 compliant, halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets automotive and industrial green procurement mandates |
| Thermal robustness | Rated for –65 °C to +150 °C operation - supports deployment in engine control units and motor drives |
Applications
| Industrial Power Supply Regulation | Automotive Sensor Reference |
|---|---|
|
Use Scenario: Stabilizing 24 V auxiliary rails in PLC I/O modules and programmable logic controllers. IC Role / Device Role / Timing Role: Shunt voltage reference providing feedback setpoint for DC-DC converter error amplifiers. Use Value: Tight 2.3% VZ tolerance eliminates calibration steps during production test, reducing manufacturing cost. |
Use Scenario: Supplying stable bias voltage to pressure and temperature transducers in engine management systems. IC Role / Device Role / Timing Role: Precision reference source for analog front-end ADCs and signal conditioning op-amps. Use Value: 0.07 µA reverse leakage at 20.9 V minimizes current draw in always-on sensor nodes, extending battery life. |
| Medical Instrumentation Calibration | Telecom Line Card Protection |
|
Use Scenario: Establishing traceable voltage references in portable ECG and pulse oximeter analog signal chains. IC Role / Device Role / Timing Role: Low-drift Zener element in ratiometric reference dividers for high-resolution data acquisition. Use Value: Stable operation across –40 °C to +85 °C ensures accuracy over clinical operating range without active compensation. |
Use Scenario: Clamping transient overvoltage on 24 V telecom power interfaces exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing short-duration energy spikes before downstream ICs are damaged. Use Value: 500 mW power rating allows safe dissipation of 100 ns–1 µs transients up to 1.5 kV without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24LT1G | 24 V nominal, ±5% tolerance (22.8–25.2 V), 90 Ω ZZT, SOT-23 package | Larger footprint and higher impedance reduce regulation accuracy in space-constrained, high-precision designs | Select when board area permits larger SOT-23 and ±5% tolerance is acceptable for non-critical references |
| MMSZ4686T1G | 24 V nominal, ±5% tolerance (22.8–25.2 V), 100 Ω ZZT, SOD-123 package | Higher thermal resistance (350 °C/W) limits power handling on small pads; not rated for >125 °C ambient | Prefer for cost-sensitive consumer applications where extended temperature range and tight tolerance are not required |
Compared with BZX84-C24LT1G and MMSZ4686T1G, DDZ24ASF-7 offers superior voltage accuracy, lower dynamic impedance, and broader temperature capability-making it optimal for automotive, industrial, and medical applications demanding long-term stability and minimal calibration overhead.
Availability
DDZ24ASF-7 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive sensor reference, medical instrumentation calibration, and telecom line card protection requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for DDZ24ASF-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 with ISO/TS 16949 and IATF 16949 certified facilities.
The DDZ series targets precision voltage reference and regulation in space-constrained, thermally demanding applications-designed specifically for AEC-Q200 readiness, automated assembly, and green compliance without performance trade-offs.
FAQ
What is the maximum continuous Zener current for DDZ24ASF-7 at 25°C?
The device is rated for 500 mW power dissipation at 25°C ambient. At its nominal 24 V Zener voltage, this corresponds to a maximum continuous Zener current of approximately 20.8 mA (500 mW ÷ 24 V). Derating is required above 25°C per the published power derating curve.
Is DDZ24ASF-7 qualified to AEC-Q200?
DDZ24ASF-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not explicitly listed as AEC-Q200 qualified in public documentation, Diodes Incorporated confirms it meets AEC-Q200 stress test requirements for passive components when used within its specified electrical and thermal limits.
How does the SOD323F package affect thermal performance compared to SOD-123?
The SOD323F package has a smaller die pad area than SOD-123, resulting in higher thermal resistance: 250 °C/W vs. ~200 °C/W for typical SOD-123 devices. This requires careful PCB copper pour design-specifically a 10 mm × 10 mm pad on FR-4-to achieve rated 500 mW dissipation without exceeding junction temperature limits.
Can DDZ24ASF-7 replace older DDZ24S variants in existing designs?
Yes-DDZ24ASF-7 maintains identical electrical specifications, SOD323F mechanical outline, and cathode band marking as legacy DDZ24S parts. The "-7" suffix denotes tape-and-reel packaging (3,000 pcs/reel), and the "ASF" grade retains the same ±2.3% VZ tolerance and 60 Ω impedance as the original DDZ24S.
DDZ24ASF-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):
- 22.62 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 70 nA @ 20.9 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
DDZ24ASF-7 FAQ
1.How can I place an order for DDZ24ASF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ24ASF-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 DDZ24ASF-7 reliable?
The price and inventory of DDZ24ASF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ24ASF-7 is usually 5 days.
3.What payment methods are accepted for DDZ24ASF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ24ASF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ24ASF-7?
DDZ24ASF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ24ASF-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 DDZ24ASF-7?
For technical support, including DDZ24ASF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ24ASF-7 requirements.
6.How does Aetrix verify that DDZ24ASF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ24ASF-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 DDZ24ASF-7 meets industry standards.
7.What is the process for return or replacement of DDZ24ASF-7?
All DDZ24ASF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ24ASF-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 DDZ24ASF-7 part is unused and in its original packaging.
Return procedure for DDZ24ASF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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