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Diodes Incorporated BZX84C12-7-F
- Part No.:
- BZX84C12-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C12-7-F.pdf
- Description:
- DIODE ZENER 12V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:31,574
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Product details
Overview
BZX84C12-7-F from Diodes Incorporated is a 350mW surface-mount Zener diode with nominal 12V breakdown voltage (11.4–12.7V range at 5mA), 25Ω maximum Zener impedance at test current, and ±0.1µA maximum reverse leakage at 8V. It operates from –65°C to +150°C and is used for precision voltage regulation and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the BZX84C12-7-F datasheet, BZX84C12-7-F pinout, BZX84C12-7-F application, or BZX84C12-7-F equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at operating current, thermal resistance (357°C/W), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This device functions as a two-terminal voltage reference by operating in reverse-biased avalanche breakdown. Its planar die construction ensures stable Zener characteristics across temperature, with a temperature coefficient of +6.0mV/°C near 12V - enabling predictable drift compensation in bias networks.
The SOT23 package supports automated placement and reflow soldering, and its 0.008g mass and UL 94V-0 molded plastic case meet stringent requirements for space-constrained, high-reliability PCBs in industrial and automotive control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.0V nominal, 11.4–12.7V range at IZT = 5mA - defines stable regulation point under typical bias conditions |
| Power Dissipation | 350mW at ambient temperature - sets maximum continuous power handling without forced cooling |
| Zener Impedance (ZZT) | ≤25Ω at 5mA - determines output voltage stability under load transients |
| Reverse Leakage (IR) | ≤0.1µA at VR = 8V - ensures minimal quiescent current in standby regulation circuits |
| Thermal Resistance (RθJA) | 357°C/W - quantifies junction-to-ambient temperature rise per watt dissipated on standard FR-4 board |
| Operating Temperature | –65°C to +150°C - enables deployment in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - confirms reliability for automotive electronics per stress-test standards |
Pinout & Package
Package: SOT23 - three-terminal surface-mount plastic package with matte tin-plated alloy 42 leadframe, moisture sensitivity level 1, and UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to circuit ground or lower-potential node when used in shunt regulation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to input supply rail; clamps voltage to VZ when reverse-biased above breakdown |
| No-Connect (Pin 3) | Internal die attach flag / mechanical support | Not electrically connected; serves structural role in SOT23 mold compound assembly |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable Zener voltage distribution and low parameter drift over time and temperature |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control units and body electronics |
| Lead-free and halogen-free | Meets RoHS 3 (2015/863/EU) and green manufacturing requirements for global compliance |
| SOT23 tape-and-reel packaging | Enables high-speed pick-and-place assembly with 3,000-unit reels for production scalability |
Applications
| Automotive Cabin Sensors | Industrial Analog Front-Ends |
|---|---|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Shunt regulator providing stable 12V bias to op-amp input stages and ADC reference dividers. Use Value: Maintains <±1% output accuracy across –40°C to +125°C ambient, supporting ASIL-B functional safety margins. | Use Scenario: Overvoltage clamp protecting 12V-powered microcontroller I/O pins in PLC input modules. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting surge-induced excursions beyond 13V during ESD events. Use Value: Responds within nanoseconds to 8kV HBM ESD pulses while dissipating ≤350mW peak energy. |
| Medical Portable Monitors | Consumer Power Management |
Use Scenario: Precision voltage reference for battery-fed pulse oximeter analog signal chains. IC Role / Device Role / Timing Role: Low-leakage (≤0.1µA) Zener establishing stable 12V rail for photodiode transimpedance amplifiers. Use Value: Enables sub-10nA input bias current preservation, critical for accurate SpO₂ saturation calculation. | Use Scenario: Output voltage stabilization in USB-C PD adapter auxiliary bias supplies. IC Role / Device Role / Timing Role: Secondary shunt regulator trimming 12V DC-DC converter output against load-step variations. Use Value: Delivers <50mV regulation error under 10–90% load steps due to 25Ω Zener impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242B-7-F | Same 12V nominal Zener, but 225mW power rating and higher ZZT (30Ω) | Limited to lower-power bias networks; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and thermal margin needs |
| BZX84-C12-E3-08 | Identical electrical specs, but Vishay-branded and packaged in 10,000-unit reels | Same functional use; differs only in traceability and logistics chain | Select when dual-sourcing or extended reel quantity is required for high-volume production |
Compared with MMBZ5242B-7-F and BZX84-C12-E3-08, BZX84C12-7-F offers superior thermal performance (350mW vs. 225mW), tighter Zener impedance (25Ω vs. 30Ω), and formal AEC-Q101 certification - making it the preferred choice for thermally demanding or automotive-grade designs.
Availability
BZX84C12-7-F is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial analog front-ends, medical portable monitors requiring stable component supply with full traceability and lifecycle management.
Supply support for BZX84C12-7-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 and manufacturing operations across Asia and the Americas.
The BZX84 series belongs to Diodes' precision Zener diode product line, engineered specifically for voltage regulation, reference, and overvoltage protection in space-constrained, high-reliability applications across automotive, industrial, and medical markets.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The BZX84C12-7-F has a nominal Zener voltage of 12.0V with a guaranteed range of 11.4V to 12.7V at 5mA test current. It begins controlled avalanche breakdown within this band and is rated for continuous operation up to its specified power limit (350mW) when properly heat-sinked on FR-4 board.
Is this part suitable for automotive applications?
Yes - BZX84C12-7-F is explicitly qualified to AEC-Q101 standards, confirming its reliability for automotive use cases including engine control, body electronics, and ADAS sensor interfaces. Its operating temperature range (–65°C to +150°C) and robust SOT23 package further support under-hood deployment.
How does the temperature coefficient affect regulation accuracy?
At 12V, the temperature coefficient is +6.0mV/°C. Over a 100°C ambient shift (e.g., –40°C to +60°C), this introduces ~600mV of drift - requiring system-level compensation if sub-1% regulation is needed. For high-accuracy references, pairing with a negative-TC component or using temperature-insensitive topologies is recommended.
Can this Zener be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing tolerances in breakdown voltage, causing current hogging when paralleled. Even matched units risk thermal runaway due to positive temperature coefficient behavior. For >350mW regulation, use a single higher-power Zener or an active shunt regulator topology instead.
BZX84C12-7-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%
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C12-7-F FAQ
1.How can I place an order for BZX84C12-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C12-7-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 BZX84C12-7-F reliable?
The price and inventory of BZX84C12-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C12-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C12-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C12-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C12-7-F?
BZX84C12-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C12-7-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 BZX84C12-7-F?
For technical support, including BZX84C12-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C12-7-F requirements.
6.How does Aetrix verify that BZX84C12-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C12-7-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 BZX84C12-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C12-7-F?
All BZX84C12-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C12-7-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 BZX84C12-7-F part is unused and in its original packaging.
Return procedure for BZX84C12-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C12-7-F Tags
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