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Diodes Incorporated BZX84B3V3-7-F
- Part No.:
- BZX84B3V3-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B3V3-7-F.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:148,992
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Product details
Overview
BZX84B3V3-7-F from Diodes Incorporated is a precision 3.3 V ±2% tolerance Zener diode in SOT23 package, rated for 350 mW power dissipation at 25°C ambient, with 95 Ω dynamic impedance at 5 mA test current and 5 µA maximum reverse leakage at 1.0 V. It serves as a stable voltage reference or overvoltage clamp in low-power analog and digital supply regulation circuits.
For engineers reviewing the BZX84B3V3-7-F datasheet, BZX84B3V3-7-F pinout, BZX84B3V3-7-F application, or BZX84B3V3-7-F equivalent, key selection criteria include zener voltage tolerance, thermal resistance (357 °C/W), junction-to-ambient derating behavior, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This device operates in reverse breakdown mode to maintain a stable 3.3 V reference across load and line variations. Its ±2% initial tolerance and low temperature coefficient (–3.5 mV/°C) enable high-accuracy voltage clamping in precision biasing and feedback networks.
The SOT23 package supports automated placement and reflow soldering, with lead-free matte tin plating and halogen/antimony-free "Green" molding compound compliant to RoHS 3 and AEC-Q101. Thermal performance is validated under JEDEC J-STD-020 Level 1 moisture sensitivity conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.23–3.37 V range at 5 mA - ensures tight regulation in reference circuits |
| Power Dissipation (PD) | 350 mW at TA = 25°C - defines maximum continuous DC power before thermal derating |
| Zener Impedance (ZZT) | 95 Ω at IZT = 5 mA - determines AC ripple rejection capability in shunt regulator designs |
| Reverse Leakage (IR) | 5.0 µA max at VR = 1.0 V - limits standby current in low-power battery applications |
| Thermal Resistance (RθJA) | 357 °C/W - quantifies junction-to-ambient heat transfer efficiency on standard FR-4 PCB |
| Temperature Coefficient | –3.5 mV/°C - enables predictable drift compensation in temperature-stable references |
Pinout & Package
Package: SOT23 - surface-mount plastic case with three terminals, 0.008 g mass, UL 94V-0 flammability rating, and JEDEC-compliant pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower potential side in reverse-biased Zener operation |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher potential side; defines polarity for voltage clamping |
| No-Connect (Pin 3) | Internal die attach flag | Electrically isolated; used for mechanical anchoring and thermal path in SOT23 |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables direct replacement in precision reference designs without calibration adjustment |
| AEC-Q101 qualified | Validated for automotive electronics requiring high-reliability stress testing (HTOL, TC, HAST) |
| Lead-free and halogen-free | Meets RoHS 3 (2015/863/EU) and JEDEC JS-709C green material requirements |
| SOT23 footprint compatibility | Supports high-speed pick-and-place assembly and IPC-7351B-compliant PCB layout |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping of LIN bus transceiver inputs against ESD transients and load dump spikes. IC Role / Device Role / Timing Role: Shunt protection element placed between LIN line and ground, conducting only during overvoltage events. Use Value: Prevents damage to transceiver ICs by limiting peak voltage to ≤3.3 V while maintaining signal integrity during normal operation. | Use Scenario: Providing stable 3.3 V reference for 12-bit ADCs measuring thermistor or strain gauge outputs. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric measurement systems. Use Value: Delivers ±2% accuracy and low tempco (–3.5 mV/°C) to minimize measurement drift across –40°C to +125°C operating range. |
| USB-C Power Delivery Monitor | Low-Power IoT Node Voltage Regulation |
Use Scenario: Biasing voltage supervisor ICs that monitor VBUS presence and negotiate PD contracts. IC Role / Device Role / Timing Role: Reference input to comparator-based threshold detector circuit. Use Value: Ensures consistent trip point across temperature and supply variation due to tight 3.23–3.37 V tolerance band. | Use Scenario: Regulating supply to ultra-low-power microcontrollers and BLE radios during battery discharge cycles. IC Role / Device Role / Timing Role: Passive shunt regulator stabilizing 3.3 V rail when active LDO is disabled for sleep mode. Use Value: Draws only 5 µA leakage at 1.0 V, minimizing quiescent current impact on battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | Same 3.3 V nominal, but ±5% tolerance and 200 mW rating | Limited to non-critical biasing where tighter regulation is not required | Select when cost sensitivity outweighs precision and power margin needs |
| BZX84-C3V3 | Same SOT23 package and 3.3 V rating, but ±5% tolerance and no AEC-Q101 qualification | Restricted to commercial-grade consumer electronics | Choose only for non-automotive, non-industrial applications with relaxed reliability requirements |
Compared with MMBZ5226BS-7-F and BZX84-C3V3, BZX84B3V3-7-F delivers superior voltage accuracy (±2% vs. ±5%), higher power handling (350 mW vs. 200/300 mW), and automotive-grade qualification-making it the preferred choice for safety-critical or thermally constrained designs.
Availability
BZX84B3V3-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, USB-C power delivery monitors, and low-power IoT node voltage regulation requiring stable component supply and long-term lifecycle support.
Supply support for BZX84B3V3-7-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The BZX84B series belongs to Diodes' precision Zener diode product line, engineered specifically for voltage reference, overvoltage protection, and biasing applications demanding tight tolerance, low leakage, and AEC-Q101 compliance.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The BZX84B3V3-7-F has a nominal Zener voltage of 3.3 V with a guaranteed range of 3.23 V to 3.37 V at 5 mA test current. Breakdown occurs within this specified range; it is not rated for sustained operation above 3.37 V in reverse bias without exceeding its power limit or causing thermal runaway.
Is this part suitable for use in automotive applications?
Yes - BZX84B3V3-7-F is explicitly qualified to AEC-Q101 standards, including high-temperature operating life, temperature cycling, and humidity testing. Its SOT23 package, lead-free finish, and green molding compound meet automotive manufacturing and environmental requirements.
How does the thermal resistance affect real-world power handling?
With RθJA = 357 °C/W, the junction temperature rises ~357°C per watt dissipated. At 25°C ambient and 350 mW, ΔT ≈ 125°C, resulting in TJ ≈ 150°C - the absolute maximum rating. Derating is required above 50°C ambient to stay within safe operating limits.
Can this Zener be used in place of a 3.3 V voltage regulator IC?
No - it functions only as a shunt regulator and cannot source current like a linear regulator. It requires a series resistor to limit current and dissipate excess power. Use is limited to low-current reference or clamping roles, not active regulation of variable loads.
BZX84B3V3-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±2%
- Power - Max:
- 300 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 ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84B3V3-7-F FAQ
1.How can I place an order for BZX84B3V3-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B3V3-7-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 BZX84B3V3-7-F reliable?
The price and inventory of BZX84B3V3-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B3V3-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B3V3-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B3V3-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B3V3-7-F?
BZX84B3V3-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B3V3-7-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 BZX84B3V3-7-F?
For technical support, including BZX84B3V3-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B3V3-7-F requirements.
6.How does Aetrix verify that BZX84B3V3-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B3V3-7-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 BZX84B3V3-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B3V3-7-F?
All BZX84B3V3-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B3V3-7-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 BZX84B3V3-7-F part is unused and in its original packaging.
Return procedure for BZX84B3V3-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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