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Diodes Incorporated DZ9F18S92-7
- Part No.:
- DZ9F18S92-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-923
- Datasheet:
-
DZ9F18S92-7.pdf
- Description:
- DIODE ZENER 18V 200MW SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:28,469
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Product details
Overview
DZ9F18S92-7 from Diodes Incorporated is an ultra-small surface-mount Zener diode with a nominal zener voltage of 18 V (17.1–18.9 V range), 5 mA test current, 50 Ω maximum zener impedance at 5 mA, 0.1 µA maximum reverse leakage at 14 V, and 60 pF capacitance at 1 MHz/0 V. It serves as a precision voltage reference or overvoltage clamp in space-constrained power management circuits.
For engineers reviewing the DZ9F18S92-7 datasheet, DZ9F18S92-7 pinout, DZ9F18S92-7 application, or DZ9F18S92-7 equivalent, key selection criteria include its SOD923 package footprint, thermal resistance of 625 °C/W on FR-4, −65 to +150 °C operating range, and temperature coefficient of +12.4 mV/°C - critical for stable biasing in portable DC-DC converters and sensor signal conditioning.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage under varying load and temperature conditions. Its flat-lead SOD923 package enables efficient heat dissipation despite its 0.001 g mass and 1.0 × 0.6 × 0.37 mm profile.
The device exhibits a positive temperature coefficient (+12.4 mV/°C) above 10 V, ensuring predictable voltage drift in ambient-temperature-varying environments. Its 200 mW power rating is derated linearly above +25°C at 2.0 mW/°C, requiring careful thermal layout per Diodes' recommended pad design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V nominal (17.1–18.9 V min/max); defines clamping threshold in overvoltage protection circuits |
| Zener Test Current (IZT) | 5 mA; standard condition for specifying VZ and dynamic impedance |
| Zener Impedance (ZZT) | 50 Ω max at 5 mA; determines regulation accuracy under load transients |
| Reverse Leakage (IR) | 0.1 µA max at 14 V; ensures minimal quiescent current in standby-biased references |
| Capacitance (CT) | 60 pF at 1 MHz / 0 V; impacts high-frequency noise filtering capability in RF-adjacent circuits |
| Power Dissipation (PD) | 200 mW at +25°C; limits continuous clamping energy without thermal runaway on standard FR-4 |
| Thermal Resistance (RθJA) | 625 °C/W; requires minimum copper area per Diodes' SOD923 pad layout to sustain rated power |
Pinout & Package
Package: SOD923 (1.0 × 0.6 × 0.37 mm), flat-lead, exposed terminals, cathode band marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse breakdown reference node | Connected to lower-potential rail; forms voltage reference node when cathode is biased above anode |
| Cathode | Zener breakdown terminal / Voltage regulation output | Marked with band; connected to regulated voltage point; sinks current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact footprint | 1.0 × 0.6 mm SOD923 outline - fits 0402-class PCB real estate while enabling higher power density than 0201 |
| Visible solder terminals | No x-ray inspection needed - flat leads allow optical verification of solder joint integrity |
| Thermally efficient leadframe | Matte tin-annealed Alloy 42 construction - improves heat transfer from junction to PCB copper |
| Green compliance | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); meets RoHS 2 and JEDEC MSL Level 1 |
| Precision voltage reference | +12.4 mV/°C tempco and ±5% VZ tolerance - supports stable biasing in industrial sensor front-ends |
Applications
| Portable Power Management | Automotive Sensor Biasing |
|---|---|
Use Scenario: Voltage reference for low-power LDO feedback networks in wearables and IoT edge nodes. IC Role / Device Role / Timing Role: Zener diode providing stable 18 V reference to error amplifier input. Use Value: Enables accurate output regulation despite battery voltage sag down to 2.5 V, leveraging tight 17.1–18.9 V VZ tolerance. |
Use Scenario: Bias supply for Hall-effect position sensors in engine control modules. IC Role / Device Role / Timing Role: Clamp and reference element stabilizing 12 V rail against load-dump transients. Use Value: Withstands 14 V reverse stress at 0.1 µA leakage, minimizing current draw in always-on sensor circuits. |
| Industrial Signal Conditioning | Consumer Audio Protection |
Use Scenario: Overvoltage protection for analog front-end inputs in programmable logic controllers. IC Role / Device Role / Timing Role: Shunt clamp limiting input voltage to 18 V during ESD or surge events. Use Value: 60 pF capacitance avoids signal distortion in 20 kHz audio-band sensor signals while clamping fast transients. |
Use Scenario: DC rail stabilization in Bluetooth speaker power stages with Class-D amplifiers. IC Role / Device Role / Timing Role: Reference node for feedback divider in buck converter supplying amplifier ICs. Use Value: +12.4 mV/°C tempco compensates for amplifier offset drift across −25 to +85 °C ambient range. |
Availability
DZ9F18S92-7 is available at Aetrix Electronics and suitable for portable power management, automotive sensor biasing, and industrial signal conditioning requiring stable component supply with full traceability and lifecycle support.
Supply support for DZ9F18S92-7 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
DZ9F18S92-7 belongs to the DZ9F series of ultra-miniature Zener diodes engineered specifically for space-constrained voltage regulation and transient suppression in portable, automotive, and industrial electronics.
FAQ
What is the maximum power dissipation of DZ9F18S92-7 at +85°C ambient?
At +85°C ambient, DZ9F18S92-7's power dissipation is derated to 80 mW. This is calculated from its 200 mW rating at +25°C and 2.0 mW/°C derating slope: 200 mW − (85 − 25) × 2.0 = 80 mW. Operation beyond this requires thermal simulation or enhanced copper pour.
How is polarity identified on the SOD923 package?
Polarity is marked by a visible cathode band on the top surface of the SOD923 package. The cathode terminal is the side with the band; the anode is the opposite end. No dot or other marking is used - only the single band distinguishes orientation.
Does DZ9F18S92-7 meet automotive AEC-Q200 requirements?
No, DZ9F18S92-7 is not AEC-Q200 qualified. It is rated for −65 to +150 °C operation and RoHS-compliant, but Diodes Incorporated does not list it in their AEC-Q200-qualified portfolio. For automotive applications, consult Diodes' AEC-Q200 Zener families such as the BZX84-Q series.
Can DZ9F18S92-7 replace a 1N4746A in a legacy design?
No - DZ9F18S92-7 is not a drop-in replacement for 1N4746A. It uses SOD923 (1.0 × 0.6 mm) packaging versus DO-41 (4.5 × 2.5 mm), has different thermal characteristics (625 °C/W vs ~100 °C/W), and lacks the same surge rating. Layout, thermal design, and reliability validation must be redone.
DZ9F18S92-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-923
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-923
DZ9F18S92-7 FAQ
1.How can I place an order for DZ9F18S92-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DZ9F18S92-7 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 DZ9F18S92-7 reliable?
The price and inventory of DZ9F18S92-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DZ9F18S92-7 is usually 5 days.
3.What payment methods are accepted for DZ9F18S92-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DZ9F18S92-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DZ9F18S92-7?
DZ9F18S92-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DZ9F18S92-7 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 DZ9F18S92-7?
For technical support, including DZ9F18S92-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DZ9F18S92-7 requirements.
6.How does Aetrix verify that DZ9F18S92-7 is sourced from the original manufacturer or authorized distributors?
All DZ9F18S92-7 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 DZ9F18S92-7 meets industry standards.
7.What is the process for return or replacement of DZ9F18S92-7?
All DZ9F18S92-7 units undergo pre-shipment inspection (PSI). If there is an issue with DZ9F18S92-7, 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 DZ9F18S92-7 part is unused and in its original packaging.
Return procedure for DZ9F18S92-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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