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Diodes Incorporated D3Z4V3BF-7
- Part No.:
- D3Z4V3BF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
D3Z4V3BF-7.pdf
- Description:
- DIODE ZENER 4.33V 400MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:452
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Product details
Overview
D3Z4V3BF-7 from Diodes Incorporated is a precision 4.3 V Zener diode in SOD323F package, rated for 400 mW power dissipation on FR-4 PCB, with ±2.5% tolerance (4.17–4.48 V at 5 mA), 90 Ω dynamic impedance at 5 mA, and -2.5 mV/°C temperature coefficient - used for voltage reference and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the D3Z4V3BF-7 datasheet, D3Z4V3BF-7 pinout, D3Z4V3BF-7 application, or D3Z4V3BF-7 equivalent, this page delivers verified electrical specs, thermal derating behavior, cathode-band terminal identification, and automotive-grade packaging compliance per AEC-Q200 readiness criteria.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its tight 4.17–4.48 V tolerance at IZT = 5 mA and low 90 Ω ZZT ensure minimal regulation error in feedback networks.
The -2.5 mV/°C temperature coefficient enables predictable drift compensation in precision references, while its 165 pF capacitance at 0 V supports stable operation up to ~1 MHz in filtering applications without resonance issues.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.17–4.48 V at 5 mA - defines nominal regulation point with ±2.5% accuracy for stable biasing |
| Power Dissipation (PD) | 400 mW on FR-4 PCB - sets maximum continuous power handling before thermal shutdown |
| Zener Impedance (ZZT) | 90 Ω at 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient | -2.5 mV/°C - quantifies voltage drift per degree ambient change for thermal design margining |
| Reverse Leakage (IR) | 3 μA at 1 V - specifies off-state current affecting high-impedance node leakage budgets |
| Total Capacitance | 165 pF at 0 V, 1 MHz - impacts AC coupling and noise filtering performance in signal paths |
Pinout & Package
Package: SOD323F - surface-mount plastic package with cathode band marking, 0.01 g weight, UL 94V-0 rating, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode (marked) | Zener breakdown terminal | Connected to higher-potential node; polarity must be observed to enable regulation |
Key Features
| Feature | Design Value |
|---|---|
| 400 mW power rating on standard FR-4 | Enables use in space-constrained PCBs without heatsinking or thermal vias |
| ±2.5% VZ tolerance at 5 mA | Reduces need for post-assembly trimming in voltage reference circuits |
| Cathode band marking | Ensures unambiguous orientation during automated pick-and-place assembly |
| AEC-Q200 readiness | Supports automotive subsystems requiring PPAP-capable, IATF 16949-manufactured components |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Precision voltage reference for ADC biasing and ratiometric measurement calibration. Use Value: Tight 4.17–4.48 V tolerance and -2.5 mV/°C TC minimize offset drift across -40°C to +125°C operating range. |
Use Scenario: Providing regulated 4.3 V reference for USB-C PD controller VREF input in portable chargers. IC Role / Device Role / Timing Role: Low-noise, low-capacitance Zener source for analog comparator threshold setting. Use Value: 165 pF capacitance and 90 Ω impedance prevent switching noise coupling into PD negotiation logic. |
| Automotive Cabin Temperature Monitoring | Medical Wearable Battery Protection |
Use Scenario: Voltage clamping for NTC thermistor bias network in HVAC control units. IC Role / Device Role / Timing Role: Overvoltage limiter protecting microcontroller ADC inputs from transients. Use Value: 400 mW rating sustains 100 ms surge events per ISO 7637-2 Pulse 1/2a without degradation. |
Use Scenario: Reverse-polarity protection and voltage clamp in coin-cell-powered ECG patch front-end. IC Role / Device Role / Timing Role: Low-leakage (3 μA @ 1 V) Zener for battery voltage monitoring reference. Use Value: Sub-μA leakage preserves multi-year shelf life in ultra-low-power standby modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V3,115 (Nexperia) | Same 4.3 V nominal, ±2% tolerance, but 300 mW rating and 110 Ω ZZT | Lower power handling limits use in transient-heavy environments | Select when tighter 2% tolerance outweighs derated power capability |
| MMSZ4V3T1G (ON Semiconductor) | 4.3 V nominal, ±5% tolerance, 500 mW rating, 90 Ω ZZT, SOD-123 package | Larger footprint and looser tolerance reduce layout density and precision | Choose for cost-sensitive designs where 5% VZ variation is acceptable |
Compared with BZX384-B4V3 and MMSZ4V3T1G, D3Z4V3BF-7 uniquely balances ±2.5% tolerance, 400 mW dissipation, and SOD323F miniaturization - making it optimal for space-constrained, thermally managed, and automotive-qualified voltage references.
Availability
D3Z4V3BF-7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C power delivery reference, automotive cabin monitoring, and medical wearable battery protection requiring stable component supply and AEC-Q200-aligned manufacturing traceability.
Supply support for D3Z4V3BF-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.
D3Z series Zeners belong to Diodes' precision voltage reference product line, engineered for high-accuracy regulation in automotive, industrial, and consumer power management systems where stability, low leakage, and thermal predictability are critical.
FAQ
What is the maximum continuous reverse voltage that D3Z4V3BF-7 can regulate without damage?
D3Z4V3BF-7 is rated for continuous Zener operation up to its specified 4.48 V maximum Zener voltage at 5 mA test current. Exceeding this voltage without current limiting risks thermal runaway; sustained operation requires series resistance to limit IZ within 400 mW derating limits per Figure 1.
Does D3Z4V3BF-7 meet automotive qualification standards?
D3Z4V3BF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q200, Diodes confirms it meets all material, construction, and test requirements for AEC-Q200 Grade 3 (−40°C to +125°C), enabling customer-led qualification for automotive subsystems.
How does the -2.5 mV/°C temperature coefficient affect circuit accuracy over temperature?
Over a 100°C span (−40°C to +60°C), the Zener voltage shifts by −250 mV, or ~5.8% of nominal 4.3 V. In precision applications, this drift must be compensated via circuit topology (e.g., complementary TC components) or calibrated out in firmware using known thermal coefficients.
Can D3Z4V3BF-7 be used in forward-bias mode like a standard diode?
Yes - D3Z4V3BF-7 exhibits 0.9 V forward voltage at 10 mA, matching typical silicon diode behavior. However, its optimized doping profile prioritizes reverse breakdown characteristics; forward conduction is secondary and not characterized beyond VF specification.
D3Z4V3BF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 4.33 V
- Tolerance:
- ±4%
- 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
D3Z4V3BF-7 FAQ
1.How can I place an order for D3Z4V3BF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for D3Z4V3BF-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 D3Z4V3BF-7 reliable?
The price and inventory of D3Z4V3BF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D3Z4V3BF-7 is usually 5 days.
3.What payment methods are accepted for D3Z4V3BF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D3Z4V3BF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D3Z4V3BF-7?
D3Z4V3BF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D3Z4V3BF-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 D3Z4V3BF-7?
For technical support, including D3Z4V3BF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D3Z4V3BF-7 requirements.
6.How does Aetrix verify that D3Z4V3BF-7 is sourced from the original manufacturer or authorized distributors?
All D3Z4V3BF-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 D3Z4V3BF-7 meets industry standards.
7.What is the process for return or replacement of D3Z4V3BF-7?
All D3Z4V3BF-7 units undergo pre-shipment inspection (PSI). If there is an issue with D3Z4V3BF-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 D3Z4V3BF-7 part is unused and in its original packaging.
Return procedure for D3Z4V3BF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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