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Diodes Incorporated D3Z3V9BF-7
- Part No.:
- D3Z3V9BF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
D3Z3V9BF-7.pdf
- Description:
- DIODE ZENER 4.03V 400MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:9,201
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Product details
Overview
D3Z3V9BF-7 from Diodes Incorporated is a precision 0.4W surface-mount Zener diode with nominal zener voltage 3.9V (min 3.89V, max 4.16V), ±5% tolerance, 90Ω dynamic impedance at 5mA, and -2.5mV/°C temperature coefficient. It operates from -65°C to +150°C, features SOD323F package, and is used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the D3Z3V9BF-7 datasheet, D3Z3V9BF-7 pinout, D3Z3V9BF-7 application, or D3Z3V9BF-7 equivalent, key selection criteria include zener voltage tightness, thermal stability in compact PCB layouts, low leakage (<3μA @ 1V), and compatibility with automated SMT assembly on FR-4 boards.
Technical Context
This Zener diode functions as a two-terminal voltage reference device, operating in reverse breakdown mode with specified test current IZT = 5mA. Its low 90Ω zener impedance ensures stable regulation under small-signal load variations, and its negative temperature coefficient (-2.5mV/°C) enables predictable drift compensation in temperature-sensitive designs.
The device is rated for 400mW power dissipation on standard FR-4 PCBs using recommended pad layout, with thermal resistance RθJA = 312.5°C/W. Its 175pF typical junction capacitance supports use in DC and low-frequency biasing applications but limits suitability for RF or high-speed signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.89–4.16 V at 5 mA - defines precise regulation window for low-voltage reference rails |
| Power Dissipation (PD) | 400 mW on FR-4 - sets maximum continuous DC power handling without derating below 25°C |
| Zener Impedance (ZZT) | 90 Ω at 1 kHz, 5 mA - indicates low AC impedance for stable voltage under small-signal ripple |
| Reverse Leakage (IR) | 3 μA at 1 V - ensures minimal quiescent current draw in battery-powered bias networks |
| Temp. Coefficient (TC) | -2.5 mV/°C - enables predictable voltage drift correction in ambient-temperature-varying circuits |
| Junction Capacitance (CJ) | 175 pF at 0 V, 1 MHz - suitable for DC/low-frequency biasing, not RF coupling or filtering |
| Forward Voltage (VF) | 0.9 V at 10 mA - confirms standard silicon PN junction behavior for polarity verification |
Pinout & Package
Package: SOD323F - ultra-compact surface-mount plastic package (1.25 mm × 1.70 mm × 0.95 mm), halogen-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower-potential node in Zener operation | Required for correct polarity during soldering and circuit integration - reverse connection prevents regulation |
| Cathode | Marked with band; higher-potential terminal during Zener breakdown | Must be tied to regulated output node; cathode-band orientation verified optically pre-reflow |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage regulation | ±5% VZ tolerance over production lot - reduces need for post-assembly trimming in voltage reference designs |
| Automated assembly compatibility | SOD323F footprint with matte tin annealed terminals - ensures reliable reflow wetting and zero lead-free solder defects |
| Thermal stability | -2.5 mV/°C TC and 150°C max operating temperature - supports operation in automotive under-hood and industrial control environments |
| Environmental compliance | Halogen- and antimony-free "Green" compound, <900 ppm Br/Cl, <1000 ppm Sb - meets IPC-1752A material declaration requirements |
Applications
| USB Power Monitor Reference | Industrial Sensor Bias Network |
|---|---|
|
Use Scenario: Providing stable 3.9V reference for ADC input scaling in USB-powered environmental sensor nodes. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end conditioning circuitry. Use Value: Tight 3.89–4.16V range and low 3μA leakage maintain measurement accuracy while minimizing standby current drain. |
Use Scenario: Generating fixed bias voltage for bridge-based pressure transducers in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-drift DC reference source for Wheatstone bridge excitation. Use Value: -2.5mV/°C TC enables predictable offset compensation across -40°C to +85°C industrial temperature range. |
| Low-Power IoT Node Regulator | Automotive Cabin Control Interface |
|
Use Scenario: Regulating supply to microcontroller reset circuitry and EEPROM write-enable logic in coin-cell-powered trackers. IC Role / Device Role / Timing Role: Standby-mode voltage clamp protecting logic inputs from overvoltage transients. Use Value: 400mW rating and SOD323F size allow integration into space-constrained PCBs without thermal derating penalties. |
Use Scenario: Stabilizing 3.9V rail for touch controller ICs and LED backlight drivers in automotive HVAC control panels. IC Role / Device Role / Timing Role: ESD-robust voltage reference meeting AEC-Q200 stress requirements via qualified manufacturing flow. Use Value: Fully RoHS- and "Green"-compliant construction satisfies automotive OEM material disclosure mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C3V9,115 (Nexperia) | Same 3.9V nominal, ±5% tolerance, but 300mW rating and 110Ω ZZT | Limited to lower-power biasing due to reduced PD; higher impedance affects ripple rejection | Select when board-level thermal budget restricts 400mW devices or legacy Nexperia sourcing is required |
| MMSZ4685-TP (Micro Commercial Components) | 3.9V nominal, ±5%, 500mW rating, but 100Ω ZZT and no AEC-Q200 qualification path | Higher power margin allows heavier loading, but lacks automotive change control documentation | Prefer for cost-sensitive industrial designs where automotive PPAP is not mandated |
Compared with BZX384-C3V9 and MMSZ4685-TP, D3Z3V9BF-7 delivers superior thermal performance on FR-4 (400mW vs. 300/500mW), tighter impedance control (90Ω), and direct support for automotive-grade traceability through Diodes' IATF 16949 facilities.
Availability
D3Z3V9BF-7 is available at Aetrix Electronics and suitable for USB power monitoring, industrial sensor biasing, low-power IoT node regulation, and automotive cabin control interface applications requiring stable component supply and full RoHS/Green compliance.
Supply support for D3Z3V9BF-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, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage reference and regulation in space-constrained, thermally demanding applications such as automotive electronics and industrial sensing.
FAQ
What is the maximum steady-state power dissipation for D3Z3V9BF-7 on a standard FR-4 PCB?
D3Z3V9BF-7 is rated for 400mW maximum power dissipation when mounted on a 35mm × 25mm FR-4 PCB with Diodes' recommended pad layout. Derating begins above +25°C ambient per the published curve (312.5°C/W RθJA), reaching zero dissipation at +150°C.
Does D3Z3V9BF-7 meet automotive qualification standards?
D3Z3V9BF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q200 in this specific part number, Diodes offers automotive-grade variants of the D3Z series with full AEC-Q200 testing - contact Diodes or Aetrix for qualified alternatives.
How is polarity identified on the SOD323F package?
Polarity is marked by a visible cathode band on the top surface of the SOD323F package. The banded end corresponds to the cathode terminal; the opposite end is the anode. This marking aligns with JEDEC standard orientation and must be verified before reflow soldering.
Can D3Z3V9BF-7 replace older D3Z3V9B or D3Z3V9 models?
Yes - D3Z3V9BF-7 supersedes prior D3Z3V9B and D3Z3V9 versions with identical electrical specs and improved environmental compliance (halogen/antimony-free "Green" compound). The "F" suffix denotes the updated eco-material formulation and does not affect pinout, footprint, or electrical behavior.
D3Z3V9BF-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):
- 4.03 V
- Tolerance:
- ±3%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
D3Z3V9BF-7 FAQ
1.How can I place an order for D3Z3V9BF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for D3Z3V9BF-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 D3Z3V9BF-7 reliable?
The price and inventory of D3Z3V9BF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D3Z3V9BF-7 is usually 5 days.
3.What payment methods are accepted for D3Z3V9BF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D3Z3V9BF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D3Z3V9BF-7?
D3Z3V9BF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D3Z3V9BF-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 D3Z3V9BF-7?
For technical support, including D3Z3V9BF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D3Z3V9BF-7 requirements.
6.How does Aetrix verify that D3Z3V9BF-7 is sourced from the original manufacturer or authorized distributors?
All D3Z3V9BF-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 D3Z3V9BF-7 meets industry standards.
7.What is the process for return or replacement of D3Z3V9BF-7?
All D3Z3V9BF-7 units undergo pre-shipment inspection (PSI). If there is an issue with D3Z3V9BF-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 D3Z3V9BF-7 part is unused and in its original packaging.
Return procedure for D3Z3V9BF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
D3Z3V9BF-7 Tags
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