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Diodes Incorporated BZT52HC12WF-7
- Part No.:
- BZT52HC12WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC12WF-7.pdf
- Description:
- DIODE ZENER 12V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,842
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Product details
Overview
BZT52HC12WF-7 from Diodes Incorporated is a surface-mount Zener diode with nominal 12 V zener voltage (11.4–12.7 V range), 5 mA test current, 10 Ω maximum zener impedance at IZT, ±0.1 µA maximum reverse leakage at 9.4 V, and temperature coefficient of +6.0 to +10.0 mV/°C - used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the BZT52HC12WF-7 datasheet, BZT52HC12WF-7 pinout, BZT52HC12WF-7 application, or BZT52HC12WF-7 equivalent, key selection factors include its SOD123F package thermal performance (RθJA = 150 °C/W with 1 cm² cathode pad), AEC-Q101 qualification for automotive reliability, and tight 12 V tolerance under stable bias conditions.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations, with specified zener voltage measured at IZT = 5 mA and characterized up to 12.7 V maximum at 25 °C. Its positive temperature coefficient (+6.0 to +10.0 mV/°C) enables predictable drift compensation in reference designs.
The device uses a planar epitaxial construction in a flat-lead SOD123F package, optimized for low-profile mounting and enhanced power dissipation (830 mW with thermal pad). Cathode polarity is marked by a band, and terminals are matte tin annealed over copper alloy for reliable solderability per MIL-STD-202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage Range | 11.4–12.7 V at IZT = 5 mA - defines usable regulation window under standard test conditions |
| Zener Impedance | 10 Ω max at IZT = 5 mA - ensures minimal output voltage variation with current changes |
| Reverse Leakage Current | 0.1 µA max at VR = 9.4 V - guarantees low standby power loss in high-impedance bias networks |
| Temperature Coefficient | +6.0 to +10.0 mV/°C at IZT = 5 mA - enables predictable voltage drift tracking for temperature-compensated references |
| Power Dissipation | 830 mW with 1 cm² cathode pad - supports higher continuous operation than standard FR-4 layout (375 mW) |
| Package | SOD123F (Type B) - 1.8 mm × 2.7 mm footprint with 0.35–0.85 mm lead length, UL 94V-0 rated |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SOD123F (Type B) is a two-terminal surface-mount package with cathode identified by a band on the top surface. The anode and cathode leads extend symmetrically from opposite ends of the molded body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener regulation | Must be held at least 0.9 V below cathode to avoid forward conduction during regulation |
| Cathode | Current exit terminal in reverse breakdown; connected to regulated output node | Marked with band; requires thermal pad for full 830 mW rating; polarity critical for correct biasing |
Key Features
| Feature | Design Value |
|---|---|
| Flat-lead SOD123F package | Enables low-profile PCB assembly while supporting 830 mW dissipation via optimized thermal pad layout |
| AEC-Q101 qualification | Validates suitability for automotive power management, sensor biasing, and infotainment voltage references |
| Halogen- and antimony-free "Green" compound | Meets <900 ppm Br, <900 ppm Cl (<1500 ppm total Br+Cl), and <1000 ppm Sb - compliant with global environmental directives |
| Cathode-band polarity marking | Ensures unambiguous orientation during automated placement and manual inspection on high-density boards |
Applications
| Automotive Sensor Biasing | Industrial Analog Reference |
|---|---|
|
Use Scenario: Providing stable 12 V reference for pressure and temperature sensor signal conditioning circuits in engine control units. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for op-amp bias networks and ADC input scaling. Use Value: Tight 11.4–12.7 V tolerance and AEC-Q101 qualification ensure consistent sensor accuracy across −40 to +125 °C operating range. |
Use Scenario: Generating precise 12 V reference for 16-bit DACs and instrumentation amplifiers in programmable logic controllers. IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed voltage despite supply ripple and load transients. Use Value: 10 Ω zener impedance minimizes output deviation under varying load currents, improving measurement repeatability. |
| Low-Power IoT Voltage Clamp | Consumer Power Supply Protection |
|
Use Scenario: Clamping transient overvoltage on 12 V rail of battery-powered smart meters and wireless sensor nodes. IC Role / Device Role / Timing Role: Reverse-biased Zener limiting peak voltage to protect MCU GPIO and communication ICs. Use Value: 0.1 µA leakage at 9.4 V preserves battery life; SOD123F footprint fits space-constrained PCB layouts. |
Use Scenario: Regulating auxiliary 12 V supply in AC-DC adapters for set-top boxes and audio receivers. IC Role / Device Role / Timing Role: Secondary-side shunt reference stabilizing feedback loop of isolated flyback converters. Use Value: Positive temperature coefficient allows predictable drift compensation when paired with NTC thermistors in feedback divider. |
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 | 12 V nominal, 9.1–13.8 V range, 17 Ω ZZT, no AEC-Q101 qualification | General-purpose industrial use only; not validated for automotive temperature cycling or HTRB stress | Select when cost sensitivity outweighs automotive reliability requirements and tighter voltage tolerance is acceptable |
| BZX84-C12 | 12 V nominal, 11.4–12.7 V range, 25 Ω ZZT, SOT-23 package, no AEC-Q101 | Higher zener impedance limits regulation accuracy under dynamic load; smaller package reduces thermal margin | Prefer for space-constrained non-automotive designs where 25 Ω impedance is sufficient and SOT-23 footprint is required |
Compared with MMSZ5242B-7-F and BZX84-C12, BZT52HC12WF-7 delivers superior regulation stability (10 Ω vs. 17/25 Ω), automotive-grade reliability, and higher thermal capability - making it optimal for safety-critical or high-precision 12 V reference roles.
Availability
BZT52HC12WF-7 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and consumer power supply feedback networks requiring stable component supply and long-term lifecycle support.
Supply support for BZT52HC12WF-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The BZT52HC series belongs to Diodes' AEC-Q101-qualified Zener diode product line, engineered specifically for stable voltage reference and clamping in harsh-environment automotive electronics.
FAQ
What is the maximum power dissipation of BZT52HC12WF-7 under standard PCB conditions?
The device dissipates up to 375 mW when mounted on FR-4 PCB with minimum recommended pad layout, and up to 830 mW when the cathode pad is extended to 1 cm² - both values measured at 25 °C ambient. Derating begins linearly above 25 °C at 5.33 mW/°C (for 830 mW case) per the published power derating curve.
Does BZT52HC12WF-7 have a defined forward voltage specification?
Yes - forward voltage is specified as 0.9 V maximum at IF = 10 mA and TA = 25 °C. This value reflects typical silicon diode conduction behavior and is relevant for reverse-polarity protection or dual-use circuit configurations where forward conduction may occur.
How is polarity identified on the BZT52HC12WF-7 package?
Polarity is indicated by a cathode band printed on the top surface of the SOD123F package. The terminal adjacent to the band is the cathode; the opposite end is the anode. This marking aligns with JEDEC-standard orientation for surface-mount diodes and is verified in the mechanical drawings of DS36891 Rev. 4-2.
Is BZT52HC12WF-7 suitable for use in life support equipment?
No - Diodes Incorporated explicitly prohibits use of this device in life support systems without express written approval from its CEO. The product is not authorized for implantable, sustaining, or safety-critical medical applications per the Life Support Notice in DS36891.
BZT52HC12WF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5.42%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 10 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52HC12WF-7 FAQ
1.How can I place an order for BZT52HC12WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC12WF-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 BZT52HC12WF-7 reliable?
The price and inventory of BZT52HC12WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC12WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC12WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC12WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC12WF-7?
BZT52HC12WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC12WF-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 BZT52HC12WF-7?
For technical support, including BZT52HC12WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC12WF-7 requirements.
6.How does Aetrix verify that BZT52HC12WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC12WF-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 BZT52HC12WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC12WF-7?
All BZT52HC12WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC12WF-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 BZT52HC12WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC12WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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