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Diodes Incorporated BZT52C12T-7
- Part No.:
- BZT52C12T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT52C12T-7.pdf
- Description:
- DIODE ZENER 12V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,127
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Product details
Overview
BZT52C12T-7 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 12 V, ±5% tolerance (11.4–12.7 V), 300 mW power dissipation, and 25 Ω maximum zener impedance at 5 mA test current. It operates across –55 °C to +150 °C and serves as a precision voltage reference or overvoltage clamp in low-power analog and digital supply rails.
For engineers reviewing the BZT52C12T-7 datasheet, BZT52C12T-7 pinout, BZT52C12T-7 application, or BZT52C12T-7 equivalent, this device is selected for stable 12 V regulation in space-constrained PCBs where thermal resistance (RθJA = 417 °C/W) and low-profile SOD523 packaging are critical.
Technical Context
This Zener diode functions in reverse-biased breakdown mode, delivering regulated voltage with a temperature coefficient of +6.0 mV/°C and maximum reverse leakage of 0.1 µA at 10 V. Its flat-lead SOD523 package enables high-power density despite its 0.001 g mass and 1.92 mm² pad area.
It complies with JEDEC reliability standards and supports automotive-grade variants (Q-suffix) when qualified per AEC-Q101. The cathode band marking and matte tin–annealed terminals ensure consistent solderability per MIL-STD-202, Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal, 11.4–12.7 V range at 5 mA - ensures tight regulation for 12 V rail monitoring or clamping |
| Power Dissipation (PD) | 300 mW - supports continuous operation in low-power bias networks without forced cooling |
| Zener Impedance (ZZT) | 25 Ω max at 5 mA - maintains voltage stability under small-signal load variations |
| Reverse Leakage (IR) | 0.1 µA max at 10 V - minimizes quiescent current loss in battery-backed circuits |
| Thermal Resistance (RθJA) | 417 °C/W - defines derating slope: usable up to ~225 mW at +85 °C ambient |
| Operating Temperature | –55 °C to +150 °C - suitable for under-hood automotive and industrial control environments |
Pinout & Package
Package: SOD523 - ultra-compact, low-profile surface-mount package (1.25 mm × 0.85 mm × 0.65 mm), molded green plastic, 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 in reverse-bias configuration; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage regulation output | Marked with cathode band; supplies regulated 12 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD523 package | Enables placement in <1.0 mm board height constraints while maintaining 300 mW dissipation capability |
| Totally lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports green manufacturing |
| JEDEC-qualified high-reliability construction | Validated for extended life in industrial and automotive applications per AEC-Q101 stress testing |
| Cathode band polarity marking | Ensures unambiguous orientation during automated placement and visual inspection on fine-pitch PCBs |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Monitoring |
|---|---|
|
Use Scenario: Stabilizing reference voltage for op-amp-based current sensing in motor drive feedback loops. IC Role / Device Role / Timing Role: Zener voltage reference providing 12 V bias to instrumentation amplifier input stage. Use Value: Maintains ±1% reference accuracy across –40 °C to +105 °C ambient, enabling sub-1% current measurement error. |
Use Scenario: Clamping VBUS monitor node in USB-C PD sink controllers to prevent overvoltage damage during transient events. IC Role / Device Role / Timing Role: Overvoltage protection element shunting excess energy above 12.7 V to ground. Use Value: Responds within nanoseconds to 100 V/µs transients, limiting clamp voltage to ≤13.5 V peak with <0.1 µA leakage at 10 V. |
| Automotive Body Control Module (BCM) | IoT Edge Node Power Sequencing |
|
Use Scenario: Providing regulated 12 V reference for microcontroller ADC calibration in BCM lighting control subsystems. IC Role / Device Role / Timing Role: Precision voltage reference source for internal 12-bit ADC offset correction. Use Value: Delivers stable 12 V output with <25 Ω dynamic impedance, reducing ADC code spread by 3 LSBs at full scale. |
Use Scenario: Enabling controlled power-up sequencing of RF SoC and sensor ASIC by holding reset line until 12 V rail stabilizes. IC Role / Device Role / Timing Role: Voltage threshold detector via resistor divider + Zener clamp network. Use Value: Triggers reset release at 11.4 V with <0.5 V hysteresis, ensuring reliable boot before brownout conditions occur. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242B-7-F | Same 12 V nominal rating but ±5% tolerance, 200 mW PD, higher ZZT (30 Ω), SOD123 package (larger footprint) | Lower power handling limits use in sustained 5 mA bias networks; requires larger PCB area | Select when legacy SOD123 layout compatibility is required and thermal margin >75 mW is available |
| BZX84-C12 | 12 V rating, ±5%, 300 mW PD, but SOT-23 package (3-pin, anode/cathode/common), RθJA = 300 °C/W | Higher thermal performance allows 25% greater continuous current at +85 °C ambient | Prefer for thermally demanding environments where SOT-23 mounting and rework access are acceptable |
Compared with MMBZ5242B-7-F and BZX84-C12, the BZT52C12T-7 delivers identical voltage accuracy in a 40% smaller footprint than SOT-23 and 35% lower thermal resistance than SOD123-making it optimal for miniaturized, high-density designs where board space is constrained but 300 mW dissipation must be retained.
Availability
BZT52C12T-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery monitoring, automotive body control modules, and IoT edge node power sequencing requiring stable component supply and long-term lifecycle support.
Supply support for BZT52C12T-7 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 BZT52 series belongs to Diodes' precision Zener diode product line, engineered specifically for compact, high-reliability voltage regulation and clamping in automotive, industrial, and consumer power management systems.
FAQ
What is the maximum reverse voltage (VR) that BZT52C12T-7 can withstand before breakdown?
The BZT52C12T-7 exhibits sharp reverse breakdown at its nominal zener voltage of 12 V, with a guaranteed minimum breakdown voltage of 11.4 V at 5 mA test current. It is not rated for sustained reverse blocking above 12.7 V; operation beyond this point risks thermal runaway unless current is strictly limited by external series resistance.
Does BZT52C12T-7 require a heatsink in typical PCB applications?
No heatsink is required. With RθJA = 417 °C/W and PD = 300 mW, junction-to-ambient rise is ~125 °C at full power - but derating curves show usable power drops to ~150 mW at +85 °C ambient. Standard FR-4 layout with 1.92 mm² copper pad meets thermal needs for most 5–10 mA bias applications.
Is BZT52C12T-7 suitable for automotive applications?
Yes - the base BZT52C12T-7 meets JEDEC high-reliability standards. For AEC-Q101-qualified automotive use, Diodes offers the Q-suffix variant (e.g., BZT52C12TQ-7), manufactured in IATF 16949-certified facilities with PPAP documentation and enhanced change control.
How does the temperature coefficient affect regulation accuracy over temperature?
With a specified +6.0 mV/°C temperature coefficient, the zener voltage drifts +0.6 V over a 100 °C range (e.g., from –55 °C to +45 °C). At 25 °C, VZ = 12.0 V; at +125 °C, expected VZ ≈ 12.6 V - a +5% shift that must be accounted for in precision reference designs.
BZT52C12T-7 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%
- 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:
- SOD-523
BZT52C12T-7 FAQ
1.How can I place an order for BZT52C12T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C12T-7 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 BZT52C12T-7 reliable?
The price and inventory of BZT52C12T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C12T-7 is usually 5 days.
3.What payment methods are accepted for BZT52C12T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C12T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C12T-7?
BZT52C12T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C12T-7 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 BZT52C12T-7?
For technical support, including BZT52C12T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C12T-7 requirements.
6.How does Aetrix verify that BZT52C12T-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C12T-7 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 BZT52C12T-7 meets industry standards.
7.What is the process for return or replacement of BZT52C12T-7?
All BZT52C12T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C12T-7, 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 BZT52C12T-7 part is unused and in its original packaging.
Return procedure for BZT52C12T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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