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Diodes Incorporated BZX84C3V3W-7
- Part No.:
- BZX84C3V3W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84C3V3W-7.pdf
- Description:
- DIODE ZENER 3.3V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,157
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Product details
Overview
BZX84C3V3W-7 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 regulation and reference in low-power analog circuits.
For engineers reviewing the BZX84C3V3W-7 datasheet, BZX84C3V3W-7 pinout, BZX84C3V3W-7 application, or BZX84C3V3W-7 equivalent, key selection criteria include zener voltage tolerance (±0.2 V), thermal resistance (625 K/W), RoHS-compliant matte tin plating, ultra-small footprint, and stable temperature coefficient (–3.5 to 0 mV/°C).
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable 3.3 V reference across load variations, with specified test conditions at TA = 25°C and IZT = 5 mA. Its planar die construction ensures consistent voltage regulation and low leakage.
It exhibits a maximum zener impedance of 95 Ω at 5 mA and 600 Ω at knee current (IZK = 1.0 mA), enabling reliable performance in low-current biasing and feedback networks where tight voltage control is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.1–3.5 V range at 5 mA - defines precise clamping/reference level for 3.3 V rail monitoring |
| Power Dissipation (PD) | 200 mW - limits continuous power handling on FR4 PCB with recommended pad layout |
| Zener Impedance (ZZT) | ≤95 Ω at 5 mA - ensures minimal voltage shift under moderate current variation |
| Reverse Current (IR) | ≤5.0 µA at VR = 1.0 V - guarantees low leakage in high-impedance reference paths |
| Thermal Resistance (RθJA) | 625 K/W - indicates significant self-heating at full power; derating required above 25°C ambient |
| Temp. Coefficient (αVZ) | –3.5 to 0 mV/°C - supports stable regulation over –65°C to +125°C operating range |
| Package | SOT-323 - 2.2 mm × 1.35 mm × 0.9 mm footprint ideal for space-constrained PCBs |
Pinout & Package
Package: SOT-323 - ultra-small plastic surface-mount case with lead-free matte tin plating over Alloy 42 leadframe; polarity indicated by cathode band on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-biased regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Provides stabilized 3.3 V relative to anode; marked with band on package top view |
| Case | Non-electrical mechanical body | No internal connection; serves only as thermal and mechanical interface |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight VZ tolerance and repeatable breakdown characteristics across production lots |
| 200 mW power rating | Supports use in low-power bias networks without external heat sinking on standard FR4 |
| SOT-323 ultra-small package | Reduces board area by >50% vs. SOT-23; compatible with fine-pitch automated assembly |
| Lead-free & RoHS compliant | Meets global environmental regulations with matte tin finish and halogen-free molding compound |
Applications
| 3.3 V Power Rail Regulation | ADC Reference Voltage Source |
|---|---|
Use Scenario: Stabilizing 3.3 V supply for microcontroller I/O banks or sensor interfaces where LDO dropout is prohibitive. IC Role / Device Role / Timing Role: Shunt regulator providing dynamic voltage clamp against ripple and transient overshoot. Use Value: Maintains ±3% regulation accuracy under 0–5 mA load variation due to low ZZT and tight VZ tolerance. | Use Scenario: Generating a stable reference for 10-bit or 12-bit analog-to-digital converters in portable instrumentation. IC Role / Device Role / Timing Role: Low-noise, low-drift DC reference node decoupled from main supply noise. Use Value: Delivers <5 µA leakage and –3.5 mV/°C tempco, minimizing ADC offset drift over temperature. |
| Overvoltage Protection Clamp | Signal Level Translation |
Use Scenario: Protecting GPIO pins or communication lines (e.g., I²C) from ESD-induced voltage spikes up to ±8 kV. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 3.5 V peak during transients. Use Value: Responds within nanoseconds with <100 Ω dynamic impedance, preventing latch-up in CMOS inputs. | Use Scenario: Translating 5 V logic signals down to 3.3 V-compatible levels using passive resistor-Zener topology. IC Role / Device Role / Timing Role: Fixed-voltage sink defining logic-low threshold and clamping high-level overshoot. Use Value: Enables robust level shifting with <0.2 V hysteresis and no active components or timing delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | 3.3 V nominal, 300 mW PD, SOT-323, but higher ZZT (150 Ω) and wider VZ tolerance (±5%) | Less precise regulation; suitable for non-critical biasing only | Select when higher power margin is needed and voltage stability is secondary |
| 1SMA5913BT3G | 3.3 V nominal, 1.5 W PD, DO-214AC package - larger footprint, higher thermal mass | Used in higher-current or industrial environments requiring robust surge handling | Select when >200 mW dissipation or JEDEC-standard package compatibility is required |
Compared with MMBZ5226BS-7-F and 1SMA5913BT3G, BZX84C3V3W-7 offers superior voltage accuracy (±0.2 V), lower zener impedance (95 Ω), and optimal fit for space-constrained, low-power embedded designs where regulation fidelity matters most.
Availability
BZX84C3V3W-7 is available at Aetrix Electronics and suitable for 3.3 V reference generation, low-power rail clamping, and signal-level translation requiring stable component supply and consistent parametric performance across production batches.
Supply support for BZX84C3V3W-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.
The BZX84 series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-reliability voltage regulation and protection in consumer, computing, and industrial electronics.
FAQ
What is the maximum reverse voltage this Zener can safely clamp?
The BZX84C3V3W-7 is rated for a nominal zener voltage of 3.3 V with a guaranteed range of 3.1–3.5 V at 5 mA. It is not designed for sustained operation above its specified breakdown voltage; applying >3.5 V continuously risks exceeding its 200 mW power limit unless current is strictly limited by external series resistance.
Does this part have a specified capacitance value?
No capacitance specification is provided in the official DS30066 datasheet for BZX84C3V3W-7. While Figure 4 shows typical total capacitance trends across the BZX84 family (e.g., ~100 pF for 3.3 V devices at VR = 1 V), Diodes Incorporated does not publish a guaranteed or tested CT value for this specific variant.
Can it be used in place of a 3.3 V LDO regulator?
No - this Zener diode functions as a shunt regulator and requires a series current-limiting resistor. Unlike an LDO, it cannot source load current or maintain regulation under variable load without careful external design. It is appropriate only for low-current reference or clamping, not as a standalone power supply.
Is the SOT-323 package compatible with standard reflow profiles?
Yes - the BZX84C3V3W-7 is qualified for moisture sensitivity level 1 per J-STD-020D and supports standard Pb-free reflow profiles. Its lead-free matte tin plating and green molding compound meet IPC/JEDEC requirements for peak temperatures up to 260°C with controlled ramp rates.
BZX84C3V3W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 FAQ
1.How can I place an order for BZX84C3V3W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C3V3W-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 BZX84C3V3W-7 reliable?
The price and inventory of BZX84C3V3W-7 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 is usually 5 days.
3.What payment methods are accepted for BZX84C3V3W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C3V3W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C3V3W-7?
BZX84C3V3W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C3V3W-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 BZX84C3V3W-7?
For technical support, including BZX84C3V3W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C3V3W-7 requirements.
6.How does Aetrix verify that BZX84C3V3W-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C3V3W-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 BZX84C3V3W-7 meets industry standards.
7.What is the process for return or replacement of BZX84C3V3W-7?
All BZX84C3V3W-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C3V3W-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 BZX84C3V3W-7 part is unused and in its original packaging.
Return procedure for BZX84C3V3W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C3V3W-7 Tags
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