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Diodes Incorporated BZT52C12TQ-7-F
- Part No.:
- BZT52C12TQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT52C12TQ-7-F.pdf
- Description:
- DIODE ZENER 12V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:49,512
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Product details
Overview
BZT52C12TQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 12 V zener voltage (11.4–12.7 V range at 5 mA), 300 mW power dissipation, and SOD523 package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits for automotive body control modules, industrial sensor signal conditioning, and USB port ESD clamp auxiliary rails.
For engineers reviewing the BZT52C12TQ-7-F datasheet, BZT52C12TQ-7-F pinout, BZT52C12TQ-7-F application, or BZT52C12TQ-7-F equivalent, this page delivers verified electrical parameters, thermal derating behavior, cathode-band polarity confirmation, JEDEC-compliant reliability data, and AEC-Q200-aligned manufacturing context - all critical for automotive-grade design-in and long-lifecycle production planning.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified test current of 5 mA and maximum zener impedance of 25 Ω at that point. Its temperature coefficient is +6.0 mV/°C, indicating positive drift above 25°C, and it exhibits ≤0.1 µA reverse leakage at 8.0 V.
The device uses an alloy-42 leadframe with matte tin annealed finish, rated for -55°C to +150°C operation, and achieves 417°C/W junction-to-ambient thermal resistance on standard FR-4 PCBs - confirming suitability for thermally constrained space-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.0 V nominal (11.4–12.7 V min/max at IZT = 5 mA); enables stable 12 V rail clamping or reference generation |
| Power Dissipation (PD) | 300 mW at TA = 25°C; supports continuous low-power regulation without heatsinking in SOD523 footprint |
| Zener Impedance (ZZT) | 25 Ω max at 1 kHz, 5 mA; ensures minimal output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 8.0 V; guarantees negligible standby current in battery-powered sensing nodes |
| Thermal Resistance (RθJA) | 417°C/W on single-sided 2 oz. FR-4; defines maximum ambient rise before exceeding 150°C junction limit |
| Operating Temperature | -55°C to +150°C; qualified for under-hood automotive and industrial control environments |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic package (1.25 mm × 0.85 mm × 0.65 mm), cathode identified by band marking, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; reverse-biased during regulation; requires proper PCB polarity alignment |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies regulated 12 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-qualified high-reliability construction | Manufactured in IATF 16949-certified facilities; meets AEC-Q200 stress test requirements for automotive use |
| Green molding compound (UL 94V-0) | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); compliant with RoHS 3 and automotive environmental mandates |
| Low-profile SOD523 footprint | 0.65 mm height enables placement beneath connectors or in stacked PCB assemblies with tight Z-axis constraints |
| Matte tin annealed terminals | Solderable per MIL-STD-202 Method 208; eliminates intermetallic growth risk in reflow and long-term thermal cycling |
Applications
| Automotive Body Control Module (BCM) | Industrial Current Loop Transmitter |
|---|---|
|
Use Scenario: Regulating 12 V supply rail for microcontroller I/O buffers and CAN transceiver biasing in door module ECUs. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream logic from load-dump transients. Use Value: Maintains stable 12 V reference despite ±10% battery variation and absorbs up to 300 mW surge energy without degradation. |
Use Scenario: Providing precision 12 V reference for 4–20 mA loop transmitter DAC output stage calibration. IC Role / Device Role / Timing Role: Low-drift voltage reference source enabling <±0.5% full-scale accuracy across -40°C to +85°C. Use Value: +6.0 mV/°C tempco and 25 Ω zener impedance ensure reference stability within 12.0 ±0.15 V over operating range. |
| USB Type-C Port ESD Clamp Support Rail | Smart Sensor Node Power Management |
|
Use Scenario: Biasing TVS diodes and ESD protection ICs on VBUS line of automotive infotainment USB ports. IC Role / Device Role / Timing Role: Auxiliary voltage rail generator ensuring consistent clamping threshold for transient suppressors. Use Value: Delivers 12 V at <1 µA quiescent current, eliminating loading on main PMIC while enabling fast ESD response. |
Use Scenario: Supplying regulated bias to MEMS pressure sensor analog front-end in battery-powered tire pressure monitors. IC Role / Device Role / Timing Role: Low-leakage voltage reference stabilizing sensor excitation current and ADC reference. Use Value: ≤0.1 µA reverse leakage at 8 V extends 10-year battery life; SOD523 footprint minimizes PCB area in coin-cell-sized modules. |
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 |
|---|---|---|---|
| MMSZ5242B-7-F | Same 12 V nominal rating but higher ZZT (30 Ω max) and lower PD (200 mW); SOD123 package (larger footprint) | Less suitable for space-constrained automotive modules; acceptable in industrial PCBs with thermal relief pads | Select only if SOD123 layout already exists and thermal margin >100°C is available |
| BZX84-C12 | 12 V Zener in SOT-23; higher PD (350 mW) but wider VZ tolerance (11.4–12.7 V → 11.0–12.6 V) and no AEC-Q200 qualification | Not approved for automotive production; limited to commercial-grade consumer or prototyping use | Use only for non-automotive prototypes where cost outweighs qualification requirements |
Compared with MMSZ5242B-7-F and BZX84-C12, BZT52C12TQ-7-F uniquely combines AEC-Q200 qualification, SOD523 miniaturization, and 300 mW dissipation - making it the sole choice for volume automotive electronics requiring both size and reliability compliance.
Availability
BZT52C12TQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial 4–20 mA transmitters, and smart sensor nodes requiring stable component supply with guaranteed long-term manufacturability and AEC-Q200 traceability.
Supply support for BZT52C12TQ-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 BZT52C series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage regulation, reference, and protection in harsh-environment electronic control units where reliability, miniaturization, and regulatory compliance are mandatory.
FAQ
What is the maximum reverse voltage (VR) this Zener diode can withstand before breakdown?
The BZT52C12TQ-7-F has a nominal zener voltage of 12.0 V, with a guaranteed breakdown range of 11.4 V to 12.7 V at 5 mA test current. It is not rated for sustained reverse voltage below this range - operation below 11.4 V keeps it in high-impedance blocking mode with ≤0.1 µA leakage at 8.0 V.
Is this part qualified for automotive applications per AEC-Q200?
Yes - the "Q" suffix in BZT52C12TQ-7-F explicitly denotes AEC-Q200 qualification. It is manufactured in IATF 16949-certified facilities, undergoes high-reliability stress testing per AEC-Q200 Rev D, and supports PPAP documentation for automotive OEM programs.
How does the SOD523 package affect thermal performance compared to SOD123?
The SOD523 package has higher thermal resistance (RθJA = 417°C/W) than SOD123 (~250°C/W) due to smaller pad area and reduced copper exposure. Derating begins at ~70°C ambient for full 300 mW operation, requiring careful PCB layout with thermal vias if used near heat sources.
Can this Zener diode be used in place of a 12 V linear regulator for low-current loads?
No - it lacks current-limiting capability and regulation feedback. While it maintains ~12 V at fixed 5 mA, output voltage sags significantly under load variation. It serves only as a shunt reference or clamp; a dedicated LDO or switching regulator is required for active voltage regulation.
BZT52C12TQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5.4%
- 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:
- SOD-523
BZT52C12TQ-7-F FAQ
1.How can I place an order for BZT52C12TQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C12TQ-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 BZT52C12TQ-7-F reliable?
The price and inventory of BZT52C12TQ-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 BZT52C12TQ-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C12TQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C12TQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C12TQ-7-F?
BZT52C12TQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C12TQ-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 BZT52C12TQ-7-F?
For technical support, including BZT52C12TQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C12TQ-7-F requirements.
6.How does Aetrix verify that BZT52C12TQ-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C12TQ-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 BZT52C12TQ-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C12TQ-7-F?
All BZT52C12TQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C12TQ-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 BZT52C12TQ-7-F part is unused and in its original packaging.
Return procedure for BZT52C12TQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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