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Diodes Incorporated DDZ15ASF-7
- Part No.:
- DDZ15ASF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
DDZ15ASF-7.pdf
- Description:
- DIODE ZENER 13.79V 500MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:31,503
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Product details
Overview
DDZ15ASF-7 from Diodes Incorporated is a precision 15 V Zener diode in SOD323F package, designed for voltage regulation and reference applications with ±3.0% zener voltage tolerance (13.44–14.13 V at 10 mA), 40 Ω dynamic impedance, and 0.07 µA reverse leakage at 12.8 V. It delivers stable regulation in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.
For engineers reviewing the DDZ15ASF-7 datasheet, DDZ15ASF-7 pinout, DDZ15ASF-7 application, or DDZ15ASF-7 equivalent, this page provides verified electrical parameters, thermal derating behavior, SOD323F terminal mapping, automotive-grade packaging compliance, and direct alternatives with documented voltage/impedance trade-offs.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal test current of 10 mA and exhibits a temperature coefficient near +5.5 mV/°C (inferred from Fig. 3 for ~15 V devices), enabling predictable drift compensation in reference designs. Its 500 mW power rating is valid only on FR-4 PCBs with specified 10 mm × 10 mm copper pads.
The device uses a planar epitaxial construction with matte tin–annealed copper alloy leadframe, achieving J-STD-020 Level 1 moisture sensitivity and full RoHS 3 / halogen-free "Green" compliance. Cathode identification is via molded band - no anode marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.44–14.13 V @ IZT = 10 mA - defines regulation window for precision feedback networks |
| Zener Impedance (ZZT) | 40 Ω @ 1 kHz - limits output voltage variation under load transients |
| Reverse Leakage (IR) | 0.07 µA @ VR = 12.8 V - ensures minimal error current in high-impedance reference nodes |
| Power Dissipation (PD) | 500 mW on FR-4 with 10 mm × 10 mm pad - sets maximum continuous bias current (≈35 mA at 14 V) |
| Thermal Resistance (RθJA) | 250 °C/W - requires ambient derating above 75°C per Fig. 1 (e.g., 375 mW at +100°C) |
| Package | SOD323F - 2-pin surface-mount outline with 0.25–0.35 mm lead width and 2.50 mm body height |
| Forward Voltage (VF) | 0.9 V @ IF = 10 mA - relevant for reverse-polarity protection or dual-use clamp configurations |
Pinout & Package
SOD323F is a 2-terminal surface-mount package with cathode identified by a molded band. The leadframe is matte tin–annealed copper alloy, solderable per MIL-STD-202 Method 208. Body dimensions: 1.25 mm × 1.70 mm × 0.75 mm (L × W × H), weight ≈ 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node connection | Connected to system GND or lower-potential rail; forms return path during Zener conduction |
| Cathode | Regulated output node | Marked with band; supplies stable voltage to feedback divider or sensing circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage tolerance | ±3.0% (13.44–14.13 V) - enables tight-setpoint regulation without external trimming |
| Low dynamic impedance | 40 Ω - maintains <14 mV output shift per 0.5 mA load change in feedback paths |
| Automated assembly compatibility | SOD323F footprint with J-STD-020 Level 1 moisture rating - supports standard reflow profiles without baking |
| Environmental compliance | RoHS 3, halogen-free, antimony-free - meets IPC-1752A reporting and automotive PPAP requirements |
| Thermal stability | Derates linearly from 500 mW at 25°C to zero at 150°C - enables predictable lifetime modeling in sealed enclosures |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Zener reference for TL431-like shunt regulator or direct feedback node clamp. Use Value: 40 Ω impedance minimizes loop gain variation across line/load changes, improving transient response. |
Use Scenario: Provides stable excitation voltage for RTD or bridge-based pressure sensors. IC Role / Device Role / Timing Role: Low-drift voltage reference replacing higher-cost bandgap ICs in 2-wire sensor interfaces. Use Value: 0.07 µA leakage avoids measurable offset in 100 kΩ+ sensor bridges, preserving 16-bit ADC accuracy. |
| Overvoltage Clamp Protection | Microcontroller I/O Protection |
Use Scenario: Clamps 12 V rail surges in automotive body control modules during load dump events. IC Role / Device Role / Timing Role: Fast-acting shunt limiter placed before LDO input or MCU power pins. Use Value: 500 mW rating sustains 100 ms pulses up to 28 V without degradation, per ISO 7637-2 Pulse 5a. |
Use Scenario: Protects 3.3 V GPIO pins from ESD and accidental 5 V misconnection. IC Role / Device Role / Timing Role: Bidirectional clamp (anode-to-GND, cathode-to-rail) limiting excursion to ±0.9 V forward / 14.13 V reverse. Use Value: SOD323F size fits 0402 footprints, enabling placement within 2 mm of protected pin for effective high-frequency suppression. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDZ15BSF-7 | Zener range 13.89–14.62 V, same 40 Ω ZZT, 0.07 µA IR | Higher nominal VZ shifts regulation point upward; suitable where tighter upper bound is required | Select when design targets 14.25 V ±0.35 V rather than 13.79 V ±0.35 V |
| BZX84-C15-7-F | 14.4–15.6 V range, 30 Ω ZZT, 100 nA IR @ 12 V, SOT-23 package | Larger footprint, lower leakage, but 20% wider VZ tolerance (±7%) | Choose for ultra-low-leakage needs in battery-powered sensors, accepting looser voltage setpoint |
Compared with DDZ15ASF-7, DDZ15BSF-7 offers a higher nominal Zener voltage ideal for upward-shifted regulation targets, while BZX84-C15-7-F trades tighter leakage for reduced voltage precision and larger package-making it suitable for cost-sensitive, low-leakage applications where 15 V nominal is acceptable.
Availability
DDZ15ASF-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive power supply feedback loops, overvoltage clamping circuits, and microcontroller I/O protection requiring stable component supply and full RoHS 3 compliance.
Supply support for DDZ15ASF-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.
The DDZxxASF/BSF/CSF/DSF series targets precision voltage reference and regulation in space-constrained, thermally demanding environments-designed specifically for automated SMT assembly and AEC-Q200-aligned reliability.
FAQ
What is the maximum continuous Zener current for DDZ15ASF-7 at 75°C ambient?
At 75°C ambient, the power derating curve (Fig. 1) specifies 375 mW maximum dissipation. With a nominal Zener voltage of 13.79 V, the maximum continuous current is 375 mW ÷ 13.79 V ≈ 27.2 mA. This assumes adequate PCB copper area per Note 5 (10 mm × 10 mm pad on 35 mm × 25 mm board).
Does DDZ15ASF-7 meet AEC-Q200 stress testing requirements?
DDZ15ASF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation, but it is not explicitly qualified to AEC-Q200. For automotive applications requiring formal AEC-Q200 certification, Diodes recommends contacting their automotive team to evaluate qualification status or select AEC-Q200–rated variants such as the BZT52 series.
Can DDZ15ASF-7 be used in place of a 1N4744A?
No-DDZ15ASF-7 (SOD323F, 500 mW, 10 mA test current) is not a drop-in replacement for 1N4744A (DO-41, 1 W, 17 mA test current). The package, power rating, test conditions, and thermal performance differ significantly. Substitution requires PCB layout revision, thermal analysis, and validation of regulation stability under target load conditions.
What is the typical temperature coefficient for DDZ15ASF-7?
Per Figure 3 in DS31987 Rev. 23, the temperature coefficient for a 15 V-class Zener diode is approximately +5.5 mV/°C. This means the Zener voltage increases by ~0.077 V over a 14°C rise (e.g., from 25°C to 39°C), directly impacting reference accuracy in unbuffered applications.
DDZ15ASF-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):
- 13.79 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 70 nA @ 12.8 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
DDZ15ASF-7 FAQ
1.How can I place an order for DDZ15ASF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ15ASF-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 DDZ15ASF-7 reliable?
The price and inventory of DDZ15ASF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ15ASF-7 is usually 5 days.
3.What payment methods are accepted for DDZ15ASF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ15ASF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ15ASF-7?
DDZ15ASF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ15ASF-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 DDZ15ASF-7?
For technical support, including DDZ15ASF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ15ASF-7 requirements.
6.How does Aetrix verify that DDZ15ASF-7 is sourced from the original manufacturer or authorized distributors?
All DDZ15ASF-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 DDZ15ASF-7 meets industry standards.
7.What is the process for return or replacement of DDZ15ASF-7?
All DDZ15ASF-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ15ASF-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 DDZ15ASF-7 part is unused and in its original packaging.
Return procedure for DDZ15ASF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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