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Diodes Incorporated BZT52C12-7-F
- Part No.:
- BZT52C12-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C12-7-F.pdf
- Description:
- DIODE ZENER 12V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:22,188
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Product details
Overview
BZT52C12-7-F from Diodes Incorporated is a surface-mount 12 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with ±5% zener voltage tolerance (11.4–12.7 V), 25 Ω maximum zener impedance at 5 mA, and 0.1 µA maximum reverse leakage at 9.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.
For engineers reviewing the BZT52C12-7-F datasheet, BZT52C12-7-F pinout, BZT52C12-7-F application, or BZT52C12-7-F equivalent, key selection criteria include zener voltage accuracy, thermal resistance (RθJA = 338 °C/W), cathode-band polarity marking, SOD123 footprint compatibility, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under controlled current conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD123 package supports automated pick-and-place assembly and provides defined thermal path via leadframe.
The device exhibits a positive temperature coefficient of +6.0 mV/°C near 12 V, enabling predictable drift compensation in voltage-reference designs. Reverse leakage remains ≤0.1 µA at VR = 9.0 V, supporting low-power standby regulation where quiescent current must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.0 V nominal, 11.4–12.7 V range at 5 mA - defines stable clamping/reference point for 12 V rail protection |
| Power Dissipation (PD) | 370 mW at TA = +25°C - limits continuous operating current to ~30 mA in ambient air |
| Zener Impedance (ZZT) | 25 Ω max at IZT = 5 mA - determines output voltage variation under load changes |
| Reverse Leakage (IR) | 0.1 µA max at VR = 9.0 V - ensures minimal standby current in battery-powered circuits |
| Thermal Resistance (RθJA) | 338 °C/W - requires PCB copper area management to avoid junction overheating above +75°C ambient |
| Temperature Coefficient | +6.0 mV/°C - enables predictable voltage drift correction in temperature-stable references |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: D = 1.40–1.70 mm, E = 2.55–2.85 mm, He = 3.55–3.85 mm; weight ≈ 0.010 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in clamping configuration; forms reference ground return path |
| Cathode | Reverse-bias breakdown terminal / Zener voltage output node | Connected to regulated node; voltage develops relative to anode during breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight VZ tolerance and repeatable breakdown behavior across production lots |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and body electronics |
| SOD123 package | Enables high-density PCB layout and compatibility with standard 0805-class reflow profiles |
| Lead-free & RoHS-compliant | Meets EU Directive 2011/65/EU and halogen-free requirements (<900 ppm Br+Cl) |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Voltage Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage for 12 V analog sensor interfaces in factory automation systems. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage regulator for op-amp bias networks and ADC reference dividers. Use Value: Maintains ±1% reference stability over -40°C to +125°C ambient, minimizing sensor offset drift. |
Use Scenario: Protecting microcontroller I/O pins from load-dump transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp limiting input voltage to ≤13.5 V during ISO 7637-2 pulse 5a events. Use Value: Absorbs 370 mW peak power without degradation, preserving signal integrity during 100 ms surges. |
| Consumer Power Adapter Feedback Network | Medical Portable Device Battery Monitoring |
Use Scenario: Providing precise 12 V feedback reference in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener element in optocoupler-based secondary-side regulation loop. Use Value: Enables <±2% output voltage regulation across line/load variations due to tight VZ tolerance. |
Use Scenario: Generating stable threshold voltage for lithium-ion cell voltage monitoring in handheld diagnostic tools. IC Role / Device Role / Timing Role: Low-leakage voltage reference for comparator inputs detecting end-of-charge condition. Use Value: Delivers 0.1 µA max IR at 9 V, extending battery runtime by reducing quiescent current in always-on monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242B-7-F | Same 12 V nominal rating but ±5% tolerance, 200 mW PD at TA = +25°C, SOT-23 package | Lower power handling; smaller footprint but higher RθJA (~400 °C/W) | Select when board space is constrained and peak power <200 mW; verify thermal margin on FR-4 |
| BZX84-C12 | 12 V, ±5%, 300 mW PD, SOT-23 package, no AEC-Q101 qualification | Lacks automotive reliability validation; higher ZZT (40 Ω) and IR (0.5 µA at 9 V) | Acceptable for commercial-grade consumer products where cost > qualification priority |
Compared with MMBZ5242B-7-F and BZX84-C12, BZT52C12-7-F offers superior thermal performance (370 mW vs. ≤300 mW), AEC-Q101 compliance for automotive use, and tighter leakage control-making it optimal for industrial and automotive voltage reference/clamp roles demanding long-term stability.
Availability
BZT52C12-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and medical portable device battery monitoring requiring stable component supply and traceable sourcing.
Supply support for BZT52C12-7-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 BZT52 series belongs to Diodes' general-purpose Zener diode product line, designed specifically for medium-current voltage regulation and transient suppression in cost-sensitive, high-volume applications.
FAQ
What is the maximum continuous Zener current for BZT52C12-7-F at +75°C ambient?
At TL = +75°C, the device supports 500 mW power dissipation. With VZ = 12 V, this corresponds to a maximum continuous Zener current of 41.7 mA. Derating applies above +75°C per Fig. 1's power derating curve, reaching zero at +150°C junction temperature.
Does BZT52C12-7-F have a specified capacitance value?
No capacitance specification is provided in the DS18004 datasheet. Figure 5 shows typical total capacitance trends across the BZT52 series but does not list discrete values for BZT52C12-7-F. For high-frequency applications, designers should characterize CT empirically or select devices with published CJ specs.
Can BZT52C12-7-F replace BZT52C12Q-7-F in automotive designs?
Yes-BZT52C12-7-F is the commercial-grade version, while BZT52C12Q-7-F is the AEC-Q101 qualified automotive variant. Both share identical electrical specs and SOD123 packaging. Only BZT52C12Q-7-F carries full automotive qualification documentation and lot-level test reports required for Tier-1 automotive programs.
What is the meaning of the "-7-F" suffix in BZT52C12-7-F?
The "-7-F" denotes tape-and-reel packaging: 3,000 units per reel, with "F" indicating lead-free, RoHS-compliant plating. This differs from "-13-F", which indicates 10,000 units per reel. The "-7-F" format is optimized for high-speed SMT placement equipment with standard feeder configurations.
BZT52C12-7-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%
- Power - Max:
- 500 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-123
BZT52C12-7-F FAQ
1.How can I place an order for BZT52C12-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C12-7-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 BZT52C12-7-F reliable?
The price and inventory of BZT52C12-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C12-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C12-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C12-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C12-7-F?
BZT52C12-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C12-7-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 BZT52C12-7-F?
For technical support, including BZT52C12-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C12-7-F requirements.
6.How does Aetrix verify that BZT52C12-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C12-7-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 BZT52C12-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C12-7-F?
All BZT52C12-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C12-7-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 BZT52C12-7-F part is unused and in its original packaging.
Return procedure for BZT52C12-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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