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Diodes Incorporated BZX84B12Q-7-F
- Part No.:
- BZX84B12Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B12Q-7-F.pdf
- Description:
- DIODE ZENER 12V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
BZX84B12Q-7-F from Diodes Incorporated is an AEC-Q101-qualified, ±2% tolerance, 12 V precision Zener diode in SOT23 package, rated for 350 mW power dissipation at ambient temperature and featuring 25 Ω maximum Zener impedance at 5 mA test current. It delivers stable voltage reference and overvoltage protection in automotive power rails, sensor biasing circuits, and low-power regulator feedback paths.
For engineers reviewing the BZX84B12Q-7-F datasheet, BZX84B12Q-7-F pinout, BZX84B12Q-7-F application, or BZX84B12Q-7-F equivalent, key selection criteria include its 12.0 V nominal Zener voltage with 11.8–12.2 V range, -65 °C to +150 °C operating temperature, AEC-Q101 qualification, 25 Ω dynamic impedance, and SOT23 lead-free packaging compatible with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode with a precisely controlled 12.0 V regulation point at 5 mA test current (IZT), exhibiting a positive temperature coefficient of +6.0 mV/°C above 6 V. Its low 25 Ω Zener impedance (ZZT) ensures minimal output voltage variation under load transients.
The device is optimized for high-reliability automotive applications, validated per AEC-Q101 stress tests including HTGB, HTRB, and TCT. Its SOT23 package supports thermal resistance of 357 °C/W when terminals are held at ambient, enabling stable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.0 V nominal, 11.8–12.2 V range at 5 mA - ensures tight voltage reference accuracy for feedback and clamping |
| Power Dissipation (PD) | 350 mW at ambient temperature - supports continuous operation without forced cooling in compact PCB layouts |
| Zener Impedance (ZZT) | 25 Ω max at 5 mA - maintains stable regulation under moderate current variations in sensing and bias circuits |
| Reverse Current (IR) | 0.1 µA max at 8.0 V - guarantees low leakage in high-impedance voltage divider and standby circuits |
| Temperature Coefficient | +6.0 mV/°C - enables predictable drift compensation in automotive environments spanning -40 °C to +125 °C ambient |
| Package | SOT23 - surface-mount footprint compatible with standard pick-and-place equipment and reflow profiles |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability including temperature cycling, humidity bias, and high-temperature operating life |
Pinout & Package
Package: SOT23 - three-terminal plastic-molded case with matte tin-plated leads, UL 94V-0 flammability rating, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground path | Connected to system ground or lower-potential node in shunt regulation configuration |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Provides stable 12 V reference when reverse-biased; connects to input rail or feedback node |
| No-Connect (Pin 3) | Internal die attach flag / mechanical support | Not electrically connected; serves structural role only - must remain unconnected in layout |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Reduces need for post-assembly calibration in voltage reference designs across production lots |
| AEC-Q101 qualification | Validates suitability for under-hood automotive modules including body control units and sensor interfaces |
| 350 mW power rating at ambient | Enables direct use in 12 V supply monitoring without external heat sinking in space-constrained ECUs |
| Lead-free, halogen-free, antimony-free "Green" construction | Meets RoHS 3 (2015/863/EU) and automotive ELV directive requirements for end-of-life compliance |
| SOT23 package with J-STD-020 Level 1 moisture rating | Eliminates bake preconditioning prior to reflow, reducing manufacturing cycle time and cost |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing reference voltage for microcontroller ADC inputs monitoring door lock actuator current. IC Role / Device Role: Shunt voltage reference providing precise 12 V bias to op-amp gain stage. Use Value: Maintains <±0.24 V regulation error over temperature, ensuring consistent current measurement resolution across -40 °C to +105 °C. |
Use Scenario: Clamping transient spikes on 4–20 mA loop-powered pressure sensor outputs. IC Role / Device Role: Overvoltage protector limiting signal line excursions to 12.2 V during ESD events. Use Value: Limits clamp voltage to ≤12.2 V with <0.1 µA leakage at 8 V, preserving loop accuracy and avoiding false triggers. |
| USB-C Power Delivery Monitor | Smart Meter Voltage Supervisor |
Use Scenario: Providing regulated 12 V reference for PD controller IC's VBUS sense divider. IC Role / Device Role: Precision Zener reference in resistive divider network feeding ADC input. Use Value: Delivers 12.0 V ±0.2 V over full temperature range, enabling accurate VBUS reporting within ±1% specification. |
Use Scenario: Monitoring main AC-DC converter output stability in residential smart meters. IC Role / Device Role: Undervoltage/overvoltage detection element in supervisor circuit. Use Value: Triggers fault flag at 11.8 V (min) and holds until 12.2 V (max), supporting IEC 62053-21 compliance for voltage accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4685T1G | 12 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package | Higher power but looser tolerance; larger footprint requires PCB redesign | Select when higher surge energy handling is required and ±5% regulation is acceptable |
| BZX84-C12 | 12 V nominal, ±5% tolerance, 300 mW rating, same SOT23 package | Non-automotive grade; lacks AEC-Q101 qualification and tighter tolerance | Acceptable for industrial prototypes where automotive qualification is not mandated |
Compared with MMSZ4685T1G and BZX84-C12, BZX84B12Q-7-F uniquely combines AEC-Q101 qualification, ±2% tolerance, and SOT23 compatibility-making it the only choice for production automotive systems requiring both precision and reliability without footprint change.
Availability
BZX84B12Q-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, USB-C power delivery monitors, and smart meter voltage supervisors requiring stable component supply with guaranteed long-term availability.
Supply support for BZX84B12Q-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, manufacturing, and sales operations across Asia, Europe, and North America.
The BZX84 series belongs to Diodes' precision Zener diode product line, engineered specifically for automotive and industrial applications demanding tight voltage tolerance, high reliability, and RoHS-compliant packaging.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The BZX84B12Q-7-F has a nominal Zener voltage of 12.0 V with a guaranteed range of 11.8 V to 12.2 V at 5 mA test current. Breakdown occurs within this range under reverse bias; it is not rated for sustained operation above 12.2 V without exceeding power limits or risking parametric shift.
Is this part suitable for use in a 12 V automotive battery monitoring circuit?
Yes - its AEC-Q101 qualification, -65 °C to +150 °C operating range, and 12.0 V ±2% tolerance make it ideal for direct connection to 12 V battery rails. When used with appropriate series resistance, it provides stable reference or clamping without derating below 105 °C ambient.
Does the "Q" in BZX84B12Q-7-F indicate automotive qualification?
Yes - the "Q" suffix denotes AEC-Q101 qualification per Diodes Incorporated's ordering nomenclature. This distinguishes it from standard-grade variants like BZX84B12-7-F and confirms compliance with automotive stress testing requirements including HTGB, HTRB, and temperature cycling.
Can this Zener be used in place of a 12 V TVS diode for ESD protection?
No - while it clamps near 12 V, its 350 mW power rating and 25 Ω impedance are insufficient for ESD pulse absorption. TVS diodes such as D3V3M1U2LP have much lower clamping voltage, higher peak pulse power (e.g., 300 W), and faster response - making them appropriate for IEC 61000-4-2 protection.
BZX84B12Q-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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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
BZX84B12Q-7-F FAQ
1.How can I place an order for BZX84B12Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B12Q-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 BZX84B12Q-7-F reliable?
The price and inventory of BZX84B12Q-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 BZX84B12Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B12Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B12Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B12Q-7-F?
BZX84B12Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B12Q-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 BZX84B12Q-7-F?
For technical support, including BZX84B12Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B12Q-7-F requirements.
6.How does Aetrix verify that BZX84B12Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B12Q-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 BZX84B12Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B12Q-7-F?
All BZX84B12Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B12Q-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 BZX84B12Q-7-F part is unused and in its original packaging.
Return procedure for BZX84B12Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84B12Q-7-F Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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