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Diodes Incorporated BZX84B3V3Q-7-F
- Part No.:
- BZX84B3V3Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B3V3Q-7-F.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
BZX84B3V3Q-7-F from Diodes Incorporated is an AEC-Q101-qualified, ±2% tolerance, 3.3 V precision Zener diode in SOT23 package, rated for 350 mW power dissipation and 5 mA test current, used for voltage regulation and reference in automotive power supply monitoring circuits.
For engineers reviewing the BZX84B3V3Q-7-F datasheet, BZX84B3V3Q-7-F pinout, BZX84B3V3Q-7-F application, or BZX84B3V3Q-7-F equivalent, key selection criteria include zener voltage tolerance (±2%), low reverse leakage (5.0 µA @ 1.0 V), temperature coefficient (-3.5 mV/°C), and automotive-grade reliability qualification.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 3.3 V at 5.0 mA test current, exhibiting a maximum zener impedance of 95 Ω at IZT and 600 Ω at knee current (IZK = 1.0 mA). Its temperature coefficient is -3.5 mV/°C, indicating stable low-voltage reference behavior over temperature.
Designed for surface-mount automated assembly, it features a lead-free, halogen-free "Green" SOT23 package with UL 94V-0 flammability rating and moisture sensitivity level 1. Thermal resistance junction-to-ambient is 357 °C/W under specified mounting 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 - enables precise low-voltage rail clamping and reference generation |
| Tolerance | ±2% - ensures tight voltage regulation without post-production trimming |
| Power Dissipation | 350 mW - supports continuous operation in compact automotive sensor interfaces |
| Reverse Leakage (IR) | 5.0 µA max @ 1.0 V - minimizes standby current in battery-backed circuits |
| Zener Impedance (ZZT) | 95 Ω max @ 5 mA - maintains stable regulation under dynamic load transients |
| Temperature Coefficient | -3.5 mV/°C - provides predictable, compensated drift for 3.3 V systems |
| Package | SOT23 - compatible with standard high-speed pick-and-place equipment and IPC-compliant PCB layouts |
Pinout & Package
Package: SOT23 - three-terminal surface-mount plastic package with matte tin-plated alloy 42 leadframe; polarity indicated by cathode band on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node during reverse-bias operation; forms ground reference in shunt regulator |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to regulated voltage node; carries reverse current during clamping |
| No-Connect / Heat Sink (Pin 3) | Leadframe thermal path | Internally tied to cathode in most variants; enhances thermal dissipation in SOT23 layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use including engine control modules and body controllers |
| ±2% VZ tolerance | Eliminates need for external calibration in 3.3 V power monitor designs |
| 350 mW power rating | Supports sustained clamping in 12 V automotive supply transient suppression (e.g., load dump) |
| Halogen- and antimony-free "Green" construction | Meets EU RoHS 3 (2015/863/EU) and automotive ELV Directive requirements |
| Moisture Sensitivity Level 1 | Enables direct placement without baking, reducing manufacturing overhead |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for microcontroller ADC inputs monitoring 12 V battery status. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 3.3 V bias for analog front-end circuitry. Use Value: ±2% tolerance ensures consistent ADC code mapping across temperature and unit variance without software compensation. |
Use Scenario: Clamping output of bridge-based pressure sensors to prevent overvoltage damage to downstream op-amps. IC Role / Device Role / Timing Role: Precision overvoltage clamp limiting signal swing to 3.3 V full-scale range. Use Value: 95 Ω zener impedance maintains linearity under sensor output transients up to 5 mA peak. |
| USB-C Power Delivery Monitor | Medical Wearable Battery Management |
Use Scenario: Providing reference for voltage supervisor IC detecting VBUS undervoltage during USB-C negotiation. IC Role / Device Role / Timing Role: Stable 3.3 V threshold reference for comparator-based fault detection. Use Value: -3.5 mV/°C tempco aligns with silicon comparator drift, minimizing false triggers from thermal drift. |
Use Scenario: Biasing low-power LDO enable input in rechargeable Li-ion wearable devices. IC Role / Device Role / Timing Role: Low-leakage (5 µA @ 1 V) voltage reference enabling ultra-low quiescent current design. Use Value: Sub-µA standby leakage preserves battery shelf life over multi-month storage periods. |
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 | 3.3 V, ±5% tolerance, 300 mW, SOT23 - looser tolerance and lower power rating | Acceptable for non-critical consumer power rails but not AEC-Q101 automotive systems | Select when cost sensitivity outweighs precision and qualification requirements |
| BZX84-C3V3-7-F | 3.3 V, ±5% tolerance, 350 mW, SOT23 - same package and power, but lacks AEC-Q101 qualification | Suitable for industrial control but excluded from automotive production due to missing stress-test validation | Choose only for non-automotive designs where qualification documentation is not required |
Compared with MMBZ5226BS-7-F and BZX84-C3V3-7-F, BZX84B3V3Q-7-F delivers tighter voltage control, automotive-grade reliability, and verified thermal performance-making it the sole option for safety-conscious vehicle subsystems requiring long-term parametric stability.
Availability
BZX84B3V3Q-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and medical wearable battery monitors requiring stable component supply and full AEC-Q101 compliance.
Supply support for BZX84B3V3Q-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 portfolio, engineered specifically for automotive voltage reference and regulation applications demanding AEC-Q101 qualification and tight parametric control.
FAQ
What is the maximum reverse voltage this Zener can sustain before breakdown?
The BZX84B3V3Q-7-F has a nominal zener voltage of 3.3 V at 5 mA test current, with guaranteed breakdown occurring between 3.23 V and 3.37 V. It is not rated for sustained operation above its specified VZ range; exceeding 3.37 V risks uncontrolled current rise unless externally limited by series resistance.
Is this device suitable for use in a 5 V logic system?
No - the BZX84B3V3Q-7-F is optimized for 3.3 V reference and clamping applications. Using it in a 5 V system would result in insufficient headroom for reliable regulation and excessive power dissipation due to higher reverse current at 5 V, potentially exceeding its 350 mW rating.
Does the "Q" suffix indicate AEC-Q101 qualification for this part?
Yes - the "Q" in BZX84B3V3Q-7-F explicitly denotes AEC-Q101 qualification per Diodes Incorporated's ordering nomenclature. This includes stress testing for temperature cycling, humidity bias, and high-temperature operating life, validating suitability for automotive under-hood and cabin applications.
How does the -3.5 mV/°C temperature coefficient affect circuit performance?
The negative temperature coefficient means the zener voltage decreases by 3.5 mV per degree Celsius rise. In 3.3 V systems, this results in ~11.5 mV total drift over a -40°C to +125°C automotive range - a known, bounded error that can be compensated in firmware or accommodated in analog design margins.
BZX84B3V3Q-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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84B3V3Q-7-F FAQ
1.How can I place an order for BZX84B3V3Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B3V3Q-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 BZX84B3V3Q-7-F reliable?
The price and inventory of BZX84B3V3Q-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 BZX84B3V3Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B3V3Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B3V3Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B3V3Q-7-F?
BZX84B3V3Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B3V3Q-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 BZX84B3V3Q-7-F?
For technical support, including BZX84B3V3Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B3V3Q-7-F requirements.
6.How does Aetrix verify that BZX84B3V3Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B3V3Q-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 BZX84B3V3Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B3V3Q-7-F?
All BZX84B3V3Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B3V3Q-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 BZX84B3V3Q-7-F part is unused and in its original packaging.
Return procedure for BZX84B3V3Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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