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Diodes Incorporated BZX84C12Q-7-F
- Part No.:
- BZX84C12Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C12Q-7-F.pdf
- Description:
- DIODE ZENER 12V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
BZX84C12Q-7-F from Diodes Incorporated is an automotive-grade 12 V, 350 mW surface-mount Zener diode in SOT23 package, with nominal Zener voltage 12 V (11.4–12.7 V range at 5 mA), dynamic impedance ≤25 Ω at 5 mA, and maximum reverse current 0.1 µA at 8 V. It provides precision voltage regulation and overvoltage protection in low-power analog and power-supply feedback circuits.
For engineers reviewing the BZX84C12Q-7-F datasheet, BZX84C12Q-7-F pinout, BZX84C12Q-7-F application, or BZX84C12Q-7-F equivalent, this page delivers verified electrical parameters, automotive qualification status (AEC-Q101), thermal derating behavior, SOT23 terminal mapping, and direct alternatives for voltage reference and clamping designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under controlled current conditions. Its planar die construction ensures consistent Zener characteristics and low leakage, with temperature coefficient of +6.0 mV/°C enabling predictable drift compensation in temperature-sensitive references.
The device is rated for 350 mW power dissipation at ambient temperature, with thermal resistance junction-to-ambient of 357 °C/W when terminals are held at ambient - critical for PCB layout decisions in thermally constrained spaces like automotive body control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal (11.4–12.7 V range at IZT = 5 mA); defines precise clamping threshold for voltage regulation |
| Power Dissipation (PD) | 350 mW at TA = 25°C; sets maximum continuous power handling without forced cooling |
| Zener Impedance (ZZT) | ≤25 Ω at IZT = 5 mA; determines output voltage stability under load current variation |
| Reverse Current (IR) | ≤0.1 µA at VR = 8 V; ensures minimal leakage in high-impedance bias networks |
| Temperature Coefficient | +6.0 mV/°C at IZT = 5 mA; enables accurate drift modeling for reference design |
| Package | SOT23; 3-terminal surface-mount footprint compatible with automated pick-and-place and reflow |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control units and infotainment power rails |
Pinout & Package
Package: SOT23 - compact 3-pin surface-mount plastic case with matte tin-plated Alloy 42 leadframe, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground path | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to voltage source via current-limiting resistor; supplies stable 12 V reference |
| No Connection (Pin 3) | Internal die attach flag / mechanical support | Not electrically connected; serves as thermal and mechanical anchor in SOT23 mold compound |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - qualified for under-hood and cabin electronics requiring extended temperature and reliability validation |
| Green packaging | Halogen- and antimony-free molding compound (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) meeting RoHS 3 and automotive environmental standards |
| Low leakage performance | 0.1 µA max reverse current at 8 V enables use in battery-powered sensor bias networks with multi-year shelf life |
| Stable Zener impedance | 25 Ω max at 5 mA supports tight regulation in feedback loops for DC-DC converters and LDO monitors |
| Thermal derating curve | Linear power reduction above 25°C ambient (0 mW at ~150°C) allows accurate thermal margining in sealed enclosures |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference for microcontroller ADC inputs monitoring 12 V battery rail health. IC Role / Device Role / Timing Role: Precision 12 V Zener reference providing stable scaling for analog front-end measurement. Use Value: Enables ±1% battery voltage reporting accuracy over -40°C to +125°C due to AEC-Q101 qualification and +6.0 mV/°C TC compensation. |
Use Scenario: Clamp protection for 4–20 mA transmitter output stage against ESD and load dump transients. IC Role / Device Role / Timing Role: Bidirectional transient suppressor (reverse-biased Zener + forward diode) limiting output swing to ±12.9 V. Use Value: Prevents op-amp saturation and protects downstream DACs using 0.1 µA leakage and 25 Ω ZZT for fast recovery after clamp event. |
| Consumer Power Adapter Feedback | Medical Portable Device Reference |
Use Scenario: Secondary-side voltage sensing in isolated flyback converter for USB-C PD compliance. IC Role / Device Role / Timing Role: Zener-based optocoupler bias reference setting primary-side regulation threshold. Use Value: Maintains ±2% output regulation across line/load/temperature with 11.4–12.7 V tolerance and 350 mW dissipation headroom. |
Use Scenario: Low-power voltage reference for portable pulse oximeter analog signal chain. IC Role / Device Role / Timing Role: Stable 12 V reference for photodiode transimpedance amplifier biasing and ADC reference divider. Use Value: Supports 16-bit measurement resolution via 25 Ω ZZT and <0.1 µA leakage, minimizing offset drift in battery-operated devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4685-TP (Micro Commercial) | 12 V nominal, 500 mW rating, 30 Ω ZZT, no AEC-Q101 qualification | Higher power margin but unqualified for automotive; suitable for industrial power supplies with >50°C ambient | Select when higher surge tolerance is needed and automotive qualification is not required |
| BZX84-C12LT1G (ON Semiconductor) | 12 V nominal, 350 mW, 25 Ω ZZT, AEC-Q101 qualified, SOT23-3L package identical pinout | Drop-in replacement with identical thermal and electrical specs; same marking and tape/reel packaging | Preferred for second-source assurance in automotive production with full pin-and-parameter compatibility |
Compared with MMSZ4685-TP and BZX84-C12LT1G, BZX84C12Q-7-F offers identical Zener performance and automotive qualification but uses Diodes Inc.'s green compound and specific date-code traceability - critical for OEM compliance audits and long-term supply continuity.
Availability
BZX84C12Q-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, and consumer power adapter feedback circuits requiring stable component supply, AEC-Q101 validation, and RoHS 3 compliance.
Supply support for BZX84C12Q-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 consumer markets.
The BZX84 series belongs to Diodes' automotive-qualified Zener diode product line, engineered for precision voltage regulation and transient suppression in space-constrained, thermally demanding environments.
FAQ
What is the maximum reverse voltage before breakdown for BZX84C12Q-7-F?
The nominal Zener voltage is 12 V with a guaranteed range of 11.4 V to 12.7 V at test current IZT = 5 mA. Breakdown occurs within this band; operation below 11.4 V yields negligible reverse current (<0.1 µA at 8 V), confirming sharp knee characteristics per DS18001 Rev. 33.
Is BZX84C12Q-7-F suitable for use in a 24 V automotive system?
Yes - it is AEC-Q101 qualified for automotive use and rated for operation up to +150°C junction temperature. When used with appropriate series resistance (e.g., ≥2.2 kΩ for 24 V input), it reliably regulates or clamps at 12 V without exceeding 350 mW dissipation or violating thermal limits.
How does the temperature coefficient affect voltage accuracy over temperature?
With a +6.0 mV/°C coefficient, the Zener voltage increases by approximately 0.6 V over a 100°C range (e.g., −40°C to +60°C). This linear drift is well-documented and compensatable in reference designs; actual measured drift across the full −40°C to +125°C range remains within ±5% of nominal.
Can BZX84C12Q-7-F replace BZX84C12-7-F in existing designs?
Yes - the "Q" suffix denotes AEC-Q101 qualification and green compound; all electrical, thermal, and mechanical specifications match BZX84C12-7-F. The only differences are enhanced reliability validation and halogen/antimony-free materials - making it a direct upgrade for automotive and high-reliability applications.
BZX84C12Q-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:
- ±5.42%
- 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
BZX84C12Q-7-F FAQ
1.How can I place an order for BZX84C12Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C12Q-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 BZX84C12Q-7-F reliable?
The price and inventory of BZX84C12Q-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 BZX84C12Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C12Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C12Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C12Q-7-F?
BZX84C12Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C12Q-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 BZX84C12Q-7-F?
For technical support, including BZX84C12Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C12Q-7-F requirements.
6.How does Aetrix verify that BZX84C12Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C12Q-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 BZX84C12Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C12Q-7-F?
All BZX84C12Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C12Q-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 BZX84C12Q-7-F part is unused and in its original packaging.
Return procedure for BZX84C12Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C12Q-7-F Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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MMSZ5231B-7-F
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MMSZ5245BS-7-F
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BZT52C15S-7-F
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MM5Z5V1ST1G
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