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Diodes Incorporated BZT52C12SQ-7-F
- Part No.:
- BZT52C12SQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C12SQ-7-F.pdf
- Description:
- DIODE ZENER 12V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:20
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Product details
Overview
BZT52C12SQ-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), 200 mW power dissipation, and SOD323 package. It provides precision voltage regulation in low-power biasing, reference, and overvoltage protection circuits for automotive and industrial control modules.
For engineers reviewing the BZT52C12SQ-7-F datasheet, BZT52C12SQ-7-F pinout, BZT52C12SQ-7-F application, or BZT52C12SQ-7-F equivalent, key selection criteria include zener voltage tolerance (±5%), temperature coefficient (+6.0 mV/°C), reverse leakage at 10 V (≤0.1 µA), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying current loads. Its planar die construction ensures consistent breakdown characteristics, while the SOD323 package supports high-density PCB layouts and automated reflow assembly.
The device exhibits a positive temperature coefficient of +6.0 mV/°C above 6 V, enabling predictable drift compensation in reference designs. With 25 Ω maximum zener impedance at 5 mA and 150 Ω at 1 mA, it delivers low dynamic resistance for tight regulation in feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.0 V nominal, 11.4–12.7 V range at IZT = 5 mA - defines regulation setpoint with ±5% tolerance |
| Power Dissipation (PD) | 200 mW at TA = 25°C - limits continuous bias current to ~16.7 mA at 12 V |
| Zener Impedance (ZZT) | 25 Ω max at 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 10 V - guarantees negligible quiescent current in standby reference paths |
| Temperature Coefficient | +6.0 mV/°C - enables predictable voltage drift for thermal compensation design |
| Package | SOD323 - 1.3 × 1.7 mm footprint with cathode band polarity marking |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control and body electronics |
Pinout & Package
SOD323 package: 2-terminal surface-mount device with cathode marked by a band on the top surface. Terminals are anode (unmarked end) and cathode (banded end); no internal connection to substrate or case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply or regulated node; voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable breakdown voltage and low parameter spread across production lots |
| AEC-Q101 qualification | Validated for automotive environments including temperature cycling, humidity, and mechanical shock |
| Lead-free & halogen-free | Meets RoHS 2 and JEDEC J-STD-020 Level 1 moisture sensitivity for standard reflow compatibility |
| Low thermal resistance | RθJA = 625°C/W enables operation up to +150°C junction temperature with minimal derating |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 12 V reference for analog-to-digital converter (ADC) biasing in ECU microcontroller subsystems. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining accuracy despite battery voltage fluctuations (9–16 V). Use Value: Enables <±1% ADC measurement accuracy over -40°C to +125°C ambient via matched temperature coefficient and low leakage. | Use Scenario: Regulating excitation voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring constant sensor bridge current under varying supply conditions. Use Value: Reduces sensor offset drift to <0.05% FS/°C by stabilizing reference point against supply ripple and thermal gradients. |
| Consumer Power Adapter Overvoltage Protection | Medical Diagnostic Equipment Bias Supply |
Use Scenario: Clamping secondary-side output voltage in flyback adapters to prevent downstream IC damage during transient surges. IC Role / Device Role / Timing Role: Fast-acting crowbar element triggered at 13.5 V to divert excess energy to ground. Use Value: Limits peak output excursion to ≤14 V for <100 ns, protecting 3.3 V/5 V logic rails without sacrificing efficiency. | Use Scenario: Generating clean, low-noise 12 V bias for photodiode transimpedance amplifiers in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Low-capacitance (≈2 pF) voltage reference minimizing signal path noise injection. Use Value: Achieves <1.5 nV/√Hz input-referred noise floor by eliminating switching artifacts from LDO alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5242B-7-F | Zener voltage 12 V (11.4–12.7 V), same SOD123 package but higher RθJA (833°C/W) and no AEC-Q101 rating | Not qualified for automotive use; suitable only for commercial-grade consumer power supplies | Select when cost is prioritized over automotive qualification and thermal performance is less constrained |
| BZX84-C12 | Same 12 V rating but SOT23 package (larger footprint), 350 mW PD, and ±6% tolerance | Higher power handling enables >29 mA regulation current but requires larger board area | Select when higher current capability is required and board space permits SOT23 placement |
Compared with MMSZ5242B-7-F and BZX84-C12, BZT52C12SQ-7-F uniquely combines AEC-Q101 qualification, SOD323 miniaturization, and ±5% voltage tolerance-making it optimal for space-constrained automotive and industrial modules requiring long-term stability.
Availability
BZT52C12SQ-7-F is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply and full traceability.
Supply support for BZT52C12SQ-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 BZT52C series belongs to Diodes' automotive-qualified Zener diode portfolio, engineered specifically for precision voltage reference and overvoltage clamping in harsh-environment electronic control units.
FAQ
What is the maximum reverse leakage current for BZT52C12SQ-7-F at 10 V?
The maximum reverse leakage current is 0.1 µA at VR = 10 V and TA = 25°C, as specified in the Electrical Characteristics table. This ultra-low leakage ensures minimal power loss in high-impedance reference circuits and supports accurate biasing of precision analog stages.
Does BZT52C12SQ-7-F have automotive qualification?
Yes, BZT52C12SQ-7-F is qualified to AEC-Q101 standards, confirmed in the Mechanical Data section of DS30093 Rev. 20-2. The "Q" in the part number explicitly denotes automotive qualification, covering stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing.
What is the thermal resistance junction-to-ambient for this device?
The thermal resistance junction-to-ambient (RθJA) is 625°C/W when mounted on an FR-4 PCB with the recommended pad layout per Diodes' package outline documentation. This value assumes standard 1 oz copper and no thermal vias; actual performance improves with enhanced copper pour or thermal relief design.
How does the temperature coefficient affect regulation accuracy over temperature?
The temperature coefficient is +6.0 mV/°C, meaning the zener voltage increases linearly with temperature. Over a -40°C to +125°C range, this results in a total shift of +0.99 V (165°C × 6.0 mV/°C), or ~8.25% of nominal 12 V. Designers must account for this in high-accuracy references using external compensation or calibration.
BZT52C12SQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5.41%
- Power - Max:
- 200 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-323
BZT52C12SQ-7-F FAQ
1.How can I place an order for BZT52C12SQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C12SQ-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 BZT52C12SQ-7-F reliable?
The price and inventory of BZT52C12SQ-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 BZT52C12SQ-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C12SQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C12SQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C12SQ-7-F?
BZT52C12SQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C12SQ-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 BZT52C12SQ-7-F?
For technical support, including BZT52C12SQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C12SQ-7-F requirements.
6.How does Aetrix verify that BZT52C12SQ-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C12SQ-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 BZT52C12SQ-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C12SQ-7-F?
All BZT52C12SQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C12SQ-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 BZT52C12SQ-7-F part is unused and in its original packaging.
Return procedure for BZT52C12SQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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