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Diodes Incorporated BZT52C12Q-7-F
- Part No.:
- BZT52C12Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C12Q-7-F.pdf
- Description:
- DIODE ZENER 12V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,976
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Product details
Overview
BZT52C12Q-7-F from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode with nominal 12 V zener voltage (11.4–12.7 V), 5 mA test current, 25 Ω maximum zener impedance at 5 mA, and 500 mW power dissipation at TL = +75°C. It provides precise voltage regulation in automotive power supply monitoring, ECU reference circuits, and overvoltage protection for sensor interfaces.
For engineers reviewing the BZT52C12Q-7-F datasheet, BZT52C12Q-7-F pinout, BZT52C12Q-7-F application, or BZT52C12Q-7-F equivalent, key selection criteria include its automotive qualification, SOD123 package thermal performance (RθJL = 150 °C/W), low leakage (0.1 µA @ 9.0 V), and tight 12 V tolerance (±5%).
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across a load under varying current conditions. Its planar die construction ensures consistent breakdown characteristics and long-term stability under thermal cycling.
The device exhibits a positive temperature coefficient of +6.0 mV/°C near 12 V, enabling predictable drift compensation in temperature-sensitive references. Its 0.010 g mass and SOD123 footprint support high-density PCB layouts in space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal, 11.4–12.7 V range at 5 mA - defines regulated output voltage tolerance in feedback or clamp circuits |
| Power Dissipation (PD) | 500 mW @ TL = +75°C - supports sustained operation in engine bay ambient with proper lead heat sinking |
| Zener Impedance (ZZT) | 25 Ω max @ IZT = 5 mA - limits output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | 0.1 µA max @ VR = 9.0 V - ensures minimal quiescent current in always-on monitoring circuits |
| Temperature Coefficient | +6.0 mV/°C @ IZTC = 5 mA - enables predictable voltage drift correction in wide-temperature-range designs |
| Package | SOD123 - industry-standard 2-pin surface-mount outline with 2.65 mm width and 3.65 mm length for automated placement |
Pinout & Package
Package: SOD123 - molded plastic case, cathode band marking, matte tin-plated alloy 42 leadframe, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; establishes reference ground for clamping or biasing |
| Cathode | Zener breakdown terminal / voltage regulation input | Connected to higher-potential rail; reverse-biased to maintain fixed voltage drop across load |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics with extended temperature and reliability testing |
| Planar die construction | Ensures repeatable breakdown voltage and low parameter drift over 1000+ thermal cycles |
| Lead-free & halogen-free | Fully RoHS-compliant and "Green" per Diodes Inc. definition (<900 ppm Br/Cl, <1000 ppm Sb) for eco-sensitive vehicle platforms |
| 500 mW power rating at TL = +75°C | Enables use in thermally demanding locations without derating when mounted on ≥1-inch copper pad |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Monitoring 12 V battery rail in engine control unit to detect undervoltage or overvoltage faults. IC Role / Device Role / Timing Role: Zener clamp referenced to microcontroller ADC input, providing scaled and stable voltage feedback. Use Value: Tight 12 V tolerance (±5%) and AEC-Q101 qualification ensure reliable fault detection across -40°C to +125°C ambient. |
Use Scenario: Generating stable 12 V reference for analog front-end of pressure or temperature transducers. IC Role / Device Role / Timing Role: Precision voltage reference source for op-amp biasing and ADC reference divider networks. Use Value: Low 0.1 µA leakage at 9 V and +6.0 mV/°C tempco allow accurate calibration over industrial temperature range. |
| USB-C Port Overvoltage Protection | Smart Lighting Driver Feedback Clamp |
Use Scenario: Clamping transient surges on 12 V auxiliary bus in USB-C PD adapter secondary side. IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting voltage spikes before they reach downstream DC-DC controllers. Use Value: 25 Ω zener impedance ensures rapid response to 100 ns transients while maintaining <13 V clamping peak. |
Use Scenario: Stabilizing feedback node voltage in constant-current LED driver ICs operating from 12 V input. IC Role / Device Role / Timing Role: Voltage regulator for optocoupler input or error amplifier reference in isolated flyback topologies. Use Value: 500 mW power rating allows continuous dissipation during dimming transitions without thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5242BQ-7-F | Same 12 V nominal, but 350 mW PD @ TA = +25°C and no AEC-Q101 qualification | Restricted to commercial-grade consumer or industrial boards without automotive reliability requirements | Select when cost sensitivity outweighs automotive qualification and thermal margin needs |
| BZX84-C12-7-F | 12 V Zener in SOT-23 package; 300 mW PD, RθJA = 300 °C/W, no AEC-Q101 | Higher thermal resistance limits sustained power handling in compact layouts; unsuitable for under-hood use | Choose only for space-constrained non-automotive PCBs where SOT-23 footprint is mandatory |
Compared with MMSZ5242BQ-7-F and BZX84-C12-7-F, BZT52C12Q-7-F delivers superior thermal robustness (500 mW @ +75°C), automotive qualification, and tighter process control-making it the sole choice for safety-critical 12 V regulation in automotive ECUs and ADAS subsystems.
Availability
BZT52C12Q-7-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and smart lighting driver production requiring stable component supply with full traceability and AEC-Q101 compliance.
Supply support for BZT52C12Q-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 BZT52C series belongs to Diodes' AEC-Q101-qualified Zener diode product line, engineered specifically for voltage regulation, reference, and overvoltage protection in harsh-environment automotive electronics.
FAQ
What is the maximum reverse current specification for BZT52C12Q-7-F at 9.0 V?
The maximum reverse current (IR) is 0.1 µA at VR = 9.0 V and TA = +25°C. This ultra-low leakage ensures minimal power loss in always-on monitoring circuits and preserves battery life in automotive standby modes.
Does BZT52C12Q-7-F have a defined thermal resistance from junction to lead (RθJL)?
Yes, RθJL is specified as 150 °C/W. This value is measured via infrared scan method and applies when the device is soldered to a PCB with ≥1-inch copper pad layout, enabling accurate thermal modeling in engine control module designs.
How does the +6.0 mV/°C temperature coefficient affect circuit performance?
The positive temperature coefficient means the zener voltage increases by 6.0 mV per degree Celsius rise. In precision references, this allows predictable compensation using negative-TC components or software calibration tables across -40°C to +150°C operating range.
Is the SOD123 package compatible with standard reflow profiles for lead-free assembly?
Yes, the SOD123 package uses matte tin finish over alloy 42 leadframe and is rated for solderability per MIL-STD-202, Method 208. It supports JEDEC J-STD-020 Class 1 (Level 1) moisture sensitivity and standard Pb-free reflow profiles up to 260°C peak.
BZT52C12Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5.42%
- Power - Max:
- 370 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:
- SOD-123
BZT52C12Q-7-F FAQ
1.How can I place an order for BZT52C12Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C12Q-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 BZT52C12Q-7-F reliable?
The price and inventory of BZT52C12Q-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 BZT52C12Q-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C12Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C12Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C12Q-7-F?
BZT52C12Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C12Q-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 BZT52C12Q-7-F?
For technical support, including BZT52C12Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C12Q-7-F requirements.
6.How does Aetrix verify that BZT52C12Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C12Q-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 BZT52C12Q-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C12Q-7-F?
All BZT52C12Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C12Q-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 BZT52C12Q-7-F part is unused and in its original packaging.
Return procedure for BZT52C12Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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