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Diodes Incorporated D3Z20BF-7
- Part No.:
- D3Z20BF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
D3Z20BF-7.pdf
- Description:
- DIODE ZENER 19.96V 400MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
D3Z20BF-7 from Diodes Incorporated is a precision 20 V Zener diode in SOD323F package, rated for 400 mW power dissipation on FR-4 PCB, with ±2.2% tolerance (19.52–20.39 V at 5 mA), 20 Ω dynamic impedance at 5 mA, and -16.4 mV/°C temperature coefficient. It serves as a stable voltage reference in low-power analog monitoring circuits.
For engineers reviewing the D3Z20BF-7 datasheet, D3Z20BF-7 pinout, D3Z20BF-7 application, or D3Z20BF-7 equivalent, this device is selected for compact, high-stability voltage regulation in space-constrained industrial sensor signal conditioning, automotive body control modules, and portable medical instrumentation where tight VZ tolerance and low thermal drift are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 20 V at IZT = 5 mA, exhibiting low dynamic impedance (20 Ω) and minimal temperature-induced drift (-16.4 mV/°C). Its SOD323F package enables high-density placement while maintaining thermal performance up to +150°C junction temperature.
The device features a cathode band marking, matte tin–annealed copper alloy terminals, and complies with AEC-Q200 stress testing requirements when qualified per customer request. Moisture sensitivity level is J-STD-020 Level 1, supporting standard reflow profiles without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.52–20.39 V at 5 mA - defines precise clamping/reference point for 20 V rail regulation |
| Power Dissipation (PD) | 400 mW on FR-4 PCB - sets maximum continuous current limit (~20 mA at 20 V) |
| Zener Impedance (ZZT) | 20 Ω at 5 mA - ensures minimal output voltage variation under load transients |
| Temperature Coefficient | -16.4 mV/°C - quantifies voltage drift over operating range (-65 to +150°C) |
| Reverse Current (IR) | 0.05 μA at 15 V - guarantees ultra-low leakage in high-impedance bias networks |
| Total Capacitance | 22 pF at 0 V - limits high-frequency noise coupling in precision reference paths |
Pinout & Package
Package: SOD323F - surface-mount plastic package (1.25 mm × 1.70 mm × 0.95 mm), UL 94V-0 rated, 0.01 g weight, cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower potential side in reverse-biased configuration; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage clamp input | Connected to regulated node; cathode band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage reference | ±2.2% VZ tolerance enables accurate 20 V threshold detection without trimming |
| Low thermal drift | -16.4 mV/°C TC supports stable operation across automotive (-40 to +125°C ambient) environments |
| Automated assembly compatibility | SOD323F footprint and matte tin finish ensure reliable solder joint formation in reflow processes |
| Green compliance | Halogen- and antimony-free, RoHS 3 compliant (<900 ppm Br/Cl, <1000 ppm Sb) for eco-sensitive designs |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Zener diode provides fixed 20 V reference for op-amp biasing and ADC reference scaling. Use Value: Tight 2.2% VZ tolerance eliminates need for post-calibration trimmers, reducing BOM count and test time. | Use Scenario: Overvoltage protection for LIN bus interface ICs in door module ECUs. IC Role / Device Role / Timing Role: Clamps transient spikes above 20 V to safeguard 5 V logic supply rails. Use Value: 20 Ω ZZT ensures rapid clamping response during load-dump events, limiting voltage overshoot to <21 V. |
| Portable Medical Pulse Oximeter | Smart Energy Meter Reference Circuit |
Use Scenario: Generating stable bias for photodiode transimpedance amplifiers in battery-powered oximeters. IC Role / Device Role / Timing Role: Low-leakage (0.05 μA) Zener maintains accuracy in high-impedance feedback networks. Use Value: Sub-nA reverse current prevents signal offset drift, preserving SpO2 measurement fidelity over 10-year product life. | Use Scenario: Providing calibration reference for metrology-grade ADCs in Class 0.2 electricity meters. IC Role / Device Role / Timing Role: Temperature-compensated 20 V reference feeds precision DAC and voltage divider network. Use Value: -16.4 mV/°C TC aligns with meter's internal compensation algorithm, enabling ±0.05% full-scale stability from -25°C to +70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B20,115 (Nexperia) | Same 20 V nominal, ±5% tolerance (19–21 V), 400 mW rating, SOD323 package | Higher VZ tolerance reduces accuracy in metrology-grade references | Select when cost sensitivity outweighs tight regulation needs and AEC-Q200 qualification is not required |
| MMSZ4684T1G (onsemi) | 20 V nominal, ±5% tolerance, 500 mW rating, SOD123 package (larger footprint) | Larger SOD123 increases board area by 40%; higher PD allows higher current but degrades thermal resistance | Choose only if existing layout accommodates SOD123 and higher power margin is needed for surge immunity |
Compared with BZX384-B20 and MMSZ4684T1G, D3Z20BF-7 delivers superior voltage accuracy (±2.2% vs. ±5%), tighter thermal drift (-16.4 mV/°C), and optimized SOD323F footprint for high-density layouts-making it preferred for precision analog and automotive-qualified designs.
Availability
D3Z20BF-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control modules, and portable medical instrumentation requiring stable component supply across multi-year production cycles.
Supply support for D3Z20BF-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 centers and manufacturing facilities across Asia and the Americas.
This device belongs to Diodes' precision Zener diode family, engineered specifically for high-accuracy voltage reference and clamping in space-constrained, thermally demanding applications such as automotive electronics and industrial automation.
FAQ
What is the maximum continuous reverse current the D3Z20BF-7 can sustain without degradation?
The D3Z20BF-7 is rated for 400 mW power dissipation on FR-4 PCB. At its nominal 20 V zener voltage, this corresponds to a maximum continuous reverse current of 20 mA. Exceeding this value risks thermal runaway and permanent parameter shift, especially above +75°C ambient.
Does the D3Z20BF-7 meet AEC-Q200 requirements for automotive use?
Standard D3Z20BF-7 units are not pre-qualified to AEC-Q200. However, Diodes Incorporated offers AEC-Q200-qualified versions upon special request, with PPAP documentation, IATF 16949 manufacturing, and extended reliability testing-including temperature cycling, humidity bias, and mechanical shock validation.
How does the -16.4 mV/°C temperature coefficient impact circuit accuracy over temperature?
Over a -40°C to +125°C junction range (ΔT = 165°C), the total VZ drift is approximately ±2.7 V. In practice, this translates to ±13.5% deviation from nominal 20 V-requiring system-level compensation (e.g., lookup tables or analog correction) for sub-1% absolute accuracy across full temperature range.
Can the D3Z20BF-7 be used in forward-bias applications like ESD protection?
No. The D3Z20BF-7 is optimized for reverse-bias Zener operation. Its forward voltage is 0.9 V at 10 mA, but it lacks the low dynamic resistance and fast response needed for effective ESD clamping. Dedicated TVS diodes (e.g., D3V3M1Q-7) are recommended for transient suppression.
D3Z20BF-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):
- 19.96 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15 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
D3Z20BF-7 FAQ
1.How can I place an order for D3Z20BF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for D3Z20BF-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 D3Z20BF-7 reliable?
The price and inventory of D3Z20BF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D3Z20BF-7 is usually 5 days.
3.What payment methods are accepted for D3Z20BF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D3Z20BF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D3Z20BF-7?
D3Z20BF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D3Z20BF-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 D3Z20BF-7?
For technical support, including D3Z20BF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D3Z20BF-7 requirements.
6.How does Aetrix verify that D3Z20BF-7 is sourced from the original manufacturer or authorized distributors?
All D3Z20BF-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 D3Z20BF-7 meets industry standards.
7.What is the process for return or replacement of D3Z20BF-7?
All D3Z20BF-7 units undergo pre-shipment inspection (PSI). If there is an issue with D3Z20BF-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 D3Z20BF-7 part is unused and in its original packaging.
Return procedure for D3Z20BF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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