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Diodes Incorporated BZT52HC12WFQ-7
- Part No.:
- BZT52HC12WFQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC12WFQ-7.pdf
- Description:
- DIODE ZENER 12V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,190
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Product details
Overview
BZT52HC12WFQ from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode with nominal zener voltage 12 V (11.4–12.7 V), 10 Ω maximum zener impedance at 5 mA, ±0.1 µA maximum reverse leakage at 8 V, and 375 mW power dissipation on standard FR-4 PCB - used for precision voltage regulation and overvoltage protection in automotive power rails.
For engineers reviewing the BZT52HC12WFQ datasheet, BZT52HC12WFQ pinout, BZT52HC12WFQ application, or BZT52HC12WFQ equivalent, key selection criteria include zener voltage tolerance, low dynamic impedance, AEC-Q101 qualification, SOD123F thermal performance, and cathode-band polarity marking for automated assembly verification.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 6.0 mV/°C typical temperature coefficient ensures predictable drift across –65°C to +150°C operating range, and its 85 pF capacitance at 1 MHz supports high-frequency noise suppression in DC-DC feedback paths.
The device uses a planar epitaxial construction with matte tin–annealed copper alloy leadframe, enabling reliable solderability per MIL-STD-202 Method 208 and compatibility with lead-free reflow profiles. Its SOD123F package delivers 150°C/W thermal resistance when mounted with 1 cm² cathode pad, supporting sustained 830 mW dissipation in thermally optimized layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4–12.7 V at 5 mA - defines regulated output range for 12 V rail clamping or reference generation |
| Zener Impedance (ZZT) | ≤10 Ω at 5 mA - ensures minimal output voltage variation under dynamic load transients |
| Reverse Leakage (IR) | ≤0.1 µA at 8 V - guarantees low quiescent current in always-on protection circuits |
| Power Dissipation (PD) | 375 mW (FR-4, min pad) / 830 mW (FR-4, 1 cm² cathode pad) - sets thermal derating limits for PCB layout |
| Capacitance (CT) | 85 pF at 1 MHz, 0 V - enables effective high-frequency EMI filtering without signal distortion |
| Temperature Coefficient (TC) | +6.0 to +10.0 mV/°C - allows accurate drift compensation in automotive ambient temperature swings |
| Forward Voltage (VF) | 0.9 V at 10 mA - supports use as low-drop clamp or polarity indicator in diagnostic circuits |
Pinout & Package
Package: SOD123F - flat-lead, low-profile surface-mount package with molded green plastic body (UL 94V-0), cathode band marking, and 0.015 g mass. Dimensions: D = 1.70–1.90 mm, E = 2.60–2.80 mm, He = 3.30–3.70 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to system ground or lower-potential node; forms reference return path during regulation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to protected rail; maintains stable voltage via controlled avalanche breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per IATF 16949 manufacturing |
| SOD123F thermal performance | 150°C/W junction-to-ambient resistance with 1 cm² copper pad - enables higher continuous power vs. standard SOD-123 |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) compliant with RoHS 3 and automotive environmental standards |
| Cathode band polarity marking | Visible visual indicator aligned with industry-standard pick-and-place fiducials - reduces assembly misorientation risk |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamping 12 V supply rail against load-dump transients in BCM microcontroller power domain. IC Role / Device Role / Timing Role: Zener voltage clamp protecting LDO input and MCU VDD pins from >200 V spikes. Use Value: 0.1 µA leakage preserves battery standby life; 10 Ω ZZT ensures sub-100 mV overshoot during 50 ms load dump events. |
Use Scenario: Protecting 4–20 mA current loop receiver inputs from field-wiring induced surges. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable 12 V reference for op-amp biasing and ADC reference buffers. Use Value: 85 pF capacitance suppresses RF noise above 10 MHz without attenuating 1 kHz sensor signals; ±1.3 V VZ tolerance meets 0.5% analog accuracy requirements. |
| Automotive Infotainment Power Sequencing | Medical Sensor Signal Conditioning |
Use Scenario: Providing clean 12 V reference for power sequencing ICs controlling multi-rail startup order. IC Role / Device Role / Timing Role: Stable voltage reference source for reset generators and enable comparators in infotainment SoC power management. Use Value: +6.0 to +10.0 mV/°C TC enables predictable offset correction across –40°C to +105°C cabin temperature range; AEC-Q101 status satisfies OEM PPAP submission requirements. |
Use Scenario: Regulating bias voltage for low-noise instrumentation amplifiers in portable ECG front-ends. IC Role / Device Role / Timing Role: Low-capacitance, low-leakage shunt regulator supplying ultra-stable 12 V to op-amp dual supplies. Use Value: 0.9 V forward voltage allows use as reverse-polarity protection diode in same footprint; 375 mW rating supports continuous operation in sealed enclosures without forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5242B-TP (Micro Commercial) | Zener voltage 12 V (11.4–12.6 V), 10 Ω ZZT, but only AEC-Q200 rated (not Q101); 500 mW PD on FR-4, no green compound | Lacks automotive qualification documentation and IATF 16949 traceability; suitable for industrial but not Tier-1 automotive designs | Select only if AEC-Q101 compliance is not required and higher power margin is needed without thermal derating |
| BZX84-C12 (Nexperia) | Zener voltage 12 V (11.4–12.7 V), 25 Ω ZZT, 300 mW PD, SOT-23 package - smaller footprint but higher thermal resistance (375°C/W) | Higher dynamic impedance degrades regulation accuracy under fast load steps; SOT-23 limits power handling in compact layouts | Prefer for space-constrained non-automotive applications where 25 Ω ZZT and 300 mW suffice |
Compared with MMSZ5242B-TP and BZX84-C12, BZT52HC12WFQ uniquely combines AEC-Q101 qualification, 10 Ω low-impedance regulation, SOD123F thermal efficiency, and halogen-free compliance - making it the only option qualified for safety-critical automotive voltage reference and clamp functions requiring full PPAP documentation.
Availability
BZT52HC12WFQ is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controllers, infotainment power sequencers, and medical sensor signal conditioning circuits requiring stable component supply with full automotive traceability.
Supply support for BZT52HC12WFQ 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 the Americas.
The BZT52HC series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage regulation, transient suppression, and reference generation in harsh-environment vehicle systems requiring AEC-Q101 compliance and IATF 16949 production control.
FAQ
What is the maximum reverse voltage this Zener diode can withstand before breakdown?
The BZT52HC12WFQ has a specified zener voltage range of 11.4 V to 12.7 V at test current IZT = 5 mA. It begins controlled reverse breakdown within this range and is rated for continuous operation up to its maximum power dissipation limit. The absolute maximum reverse voltage is not defined separately - operation beyond 12.7 V must remain within the 375 mW (or 830 mW) power envelope to avoid thermal runaway.
Is this part suitable for use in a 12 V automotive battery monitoring circuit?
Yes - BZT52HC12WFQ is AEC-Q101 qualified and designed for automotive environments. Its 11.4–12.7 V zener range aligns with nominal 12 V battery systems, and its ±0.1 µA reverse leakage at 8 V minimizes parasitic drain. The SOD123F package supports reflow soldering and meets IATF 16949 process controls required for automotive production.
How does the SOD123F package improve thermal performance over standard SOD-123?
The SOD123F features a flat-lead design with enhanced thermal pad geometry, achieving 150°C/W junction-to-ambient thermal resistance when mounted with a 1 cm² cathode copper area - compared to ~330°C/W for standard SOD-123 on minimum pads. This allows safe operation at 830 mW instead of 375 mW, doubling usable power in thermally optimized PCB layouts.
Can this Zener diode replace a BZX84-C12 in an existing design?
Electrically, yes - both regulate near 12 V and share cathode-band polarity. However, BZT52HC12WFQ uses SOD123F (larger, flatter) versus SOT-23 (smaller, taller), requiring footprint revision. It also offers lower ZZT (10 Ω vs. 25 Ω), AEC-Q101 qualification, and halogen-free packaging - benefits that justify redesign in automotive or high-reliability applications.
BZT52HC12WFQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±6.54%
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52HC12WFQ-7 FAQ
1.How can I place an order for BZT52HC12WFQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC12WFQ-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 BZT52HC12WFQ-7 reliable?
The price and inventory of BZT52HC12WFQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC12WFQ-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC12WFQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC12WFQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC12WFQ-7?
BZT52HC12WFQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC12WFQ-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 BZT52HC12WFQ-7?
For technical support, including BZT52HC12WFQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC12WFQ-7 requirements.
6.How does Aetrix verify that BZT52HC12WFQ-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC12WFQ-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 BZT52HC12WFQ-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC12WFQ-7?
All BZT52HC12WFQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC12WFQ-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 BZT52HC12WFQ-7 part is unused and in its original packaging.
Return procedure for BZT52HC12WFQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52HC12WFQ-7 Tags
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