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Diodes Incorporated BZX84C3V3W-7-F
- Part No.:
- BZX84C3V3W-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84C3V3W-7-F.pdf
- Description:
- DIODE ZENER 3.3V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,035
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Product details
Overview
BZX84C3V3W-7-F from Diodes Incorporated is a 3.3 V, 200 mW surface-mount Zener diode in SOT-323 package, with nominal zener voltage 3.3 V (min 3.1 V, max 3.5 V at IZT = 5 mA), zener impedance ≤95 Ω at 5 mA, and reverse current ≤5.0 µA at 1.0 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX84C3V3W-7-F datasheet, BZX84C3V3W-7-F pinout, BZX84C3V3W-7-F application, or BZX84C3V3W-7-F equivalent, key selection criteria include zener voltage tolerance (±6.1%), thermal resistance (625 K/W), low leakage (<5 µA @ 1 V), ultra-small SOT-323 footprint, and RoHS-compliant green molding compound.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable reverse-biased breakdown regulation at 3.3 V. It uses alloy-42 leadframe with matte tin plating and meets J-STD-020D Level 1 moisture sensitivity.
Its electrical behavior is defined by test conditions: IZT = 5 mA for VZ, f = 1 kHz for ZZT, and TA = 25 °C unless otherwise specified. Power derating begins linearly above 25 °C per the 625 K/W RθJA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.1–3.5 V range at 5 mA - ensures ±6.1% regulation tolerance in 3.3 V rail clamping |
| Power Dissipation (PD) | 200 mW at TA = 25 °C - limits continuous dissipation to avoid thermal runaway on FR4 PCBs |
| Zener Impedance (ZZT) | ≤95 Ω at 5 mA - maintains tight voltage stability under small-signal load variations |
| Reverse Current (IR) | ≤5.0 µA at VR = 1.0 V - minimizes quiescent power loss in battery-powered voltage monitors |
| Thermal Resistance (RθJA) | 625 K/W - defines temperature rise per watt on standard FR4 layout; requires thermal pad awareness |
| Operating Temperature | −65 °C to +125 °C - supports industrial and automotive under-hood sensor interface designs |
Pinout & Package
Package: SOT-323 - ultra-small plastic surface-mount case (2.2 mm × 1.35 mm × 0.9 mm), UL 94V-0 rated, lead-free, green molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / cathode reference ground path | Connected to system ground when used in shunt regulation; polarity must match schematic symbol |
| Cathode | Zener breakdown terminal / regulated output node | Connected to voltage rail being clamped; carries full zener current during overvoltage events |
| Case | Non-electrical mechanical body | No internal connection; serves only as thermal and mechanical interface - not a third electrical terminal |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables precise VZ control and repeatable breakdown characteristics across production lots |
| SOT-323 ultra-small footprint | Reduces PCB area by >50% vs. SOT-23; suitable for space-constrained portable electronics |
| Lead-free & RoHS compliant | Meets global environmental regulations without compromising solderability or reliability |
| Green molding compound | Halogen-free formulation eliminates brominated flame retardants, supporting eco-design requirements |
Applications
| Portable Battery Monitoring | Low-Voltage Microcontroller Reset Circuit |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging in wearables and Bluetooth earbuds. IC Role / Device Role / Timing Role: Zener diode provides stable 3.3 V reference for ADC input scaling and overvoltage detection threshold. Use Value: Tight 3.1–3.5 V tolerance ensures accurate state-of-charge estimation within ±2% error band. | Use Scenario: Generating clean reset signal for ARM Cortex-M0+ microcontrollers powered from 3.3 V LDOs. IC Role / Device Role / Timing Role: Acts as voltage supervisor element in RC-reset network, clamping reset line until supply stabilizes. Use Value: Low 5 µA reverse leakage prevents premature reset release during brown-out recovery. |
| Industrial Sensor Signal Conditioning | USB-C Power Negotiation Interface |
Use Scenario: Protecting 3.3 V analog front-end inputs of pressure/temperature sensors in factory automation nodes. IC Role / Device Role / Timing Role: Shunt clamp limiting transient-induced overvoltage spikes on sensor output lines. Use Value: 95 Ω zener impedance ensures fast response to ESD pulses while maintaining DC accuracy. | Use Scenario: Providing 3.3 V reference for CC logic level translation in USB-C port controllers. IC Role / Device Role / Timing Role: Supplies stable bias point for pull-up resistors on CC1/CC2 lines during PD negotiation. Use Value: −3.5 to 0 mV/°C tempco minimizes reference drift across ambient temperature ranges (−40 to +85 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ3V3T1G | Same 3.3 V nominal, but SOD-123 package (larger footprint); 500 mW PD; ZZT = 90 Ω | Higher power handling suits higher-current clamping; less space-efficient than SOT-323 | Select when thermal margin >200 mW is required and board area permits larger package |
| BZX384-C3V3,115 | Same 3.3 V rating, SOD-323 package; 300 mW PD; ZZT = 90 Ω; tighter VZ tolerance (±5%) | Higher power and tighter tolerance support precision references in instrumentation | Prefer for metrology-grade references where ±5% VZ and 300 mW headroom are critical |
Compared with MMSZ3V3T1G and BZX384-C3V3,115, BZX84C3V3W-7-F offers optimal balance of ultra-compact size, 200 mW capability, and industrial-grade temperature range in a cost-effective RoHS-compliant package.
Availability
BZX84C3V3W-7-F is available at Aetrix Electronics and suitable for portable battery monitoring, low-voltage microcontroller reset circuits, and industrial sensor signal conditioning requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX84C3V3W-7-F 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.
This part belongs to the BZX84C series of surface-mount Zener diodes, designed specifically for compact, low-power voltage regulation and protection in consumer, industrial, and computing applications.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX84C3V3W-7-F has a nominal zener voltage of 3.3 V, with guaranteed breakdown occurring between 3.1 V and 3.5 V at 5 mA test current. It is not rated for reverse blocking above its zener range - operation beyond 3.5 V induces controlled avalanche conduction, not destructive failure, provided power dissipation remains within 200 mW limits.
Does this Zener diode require a series current-limiting resistor in all applications?
Yes - a series resistor is mandatory to limit zener current and prevent thermal destruction. For example, with a 5 V supply and 3.3 V regulation target, a minimum 340 Ω resistor limits current to 5 mA at full regulation. The resistor value must be recalculated based on worst-case supply variation and desired operating current.
Is the SOT-323 package compatible with standard reflow profiles for lead-free assembly?
Yes - the SOT-323 package is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Its matte tin finish and thermal mass support peak temperatures up to 260 °C. Recommended profile includes ramp rate ≤3 °C/s, preheat 150–200 °C for 60–120 s, and time above liquidus (217 °C) of 60–90 s.
How does temperature affect the zener voltage stability of this device?
The temperature coefficient is specified as −3.5 to 0 mV/°C at 5 mA, meaning VZ decreases slightly with rising temperature. Over −40 °C to +125 °C, total drift is bounded by ±25 mV relative to 25 °C value - sufficient for non-critical references but not for high-precision metrology without compensation.
BZX84C3V3W-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±6%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84C3V3W-7-F FAQ
1.How can I place an order for BZX84C3V3W-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C3V3W-7-F 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 BZX84C3V3W-7-F reliable?
The price and inventory of BZX84C3V3W-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C3V3W-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C3V3W-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C3V3W-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C3V3W-7-F?
BZX84C3V3W-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C3V3W-7-F 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 BZX84C3V3W-7-F?
For technical support, including BZX84C3V3W-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C3V3W-7-F requirements.
6.How does Aetrix verify that BZX84C3V3W-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C3V3W-7-F 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 BZX84C3V3W-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C3V3W-7-F?
All BZX84C3V3W-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C3V3W-7-F, 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 BZX84C3V3W-7-F part is unused and in its original packaging.
Return procedure for BZX84C3V3W-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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