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Diodes Incorporated BZT52HC30WFQ-7
- Part No.:
- BZT52HC30WFQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC30WFQ-7.pdf
- Description:
- DIODE ZENER 30V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:6,979
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Product details
Overview
BZT52HC30WFQ from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode in SOD123F package, designed for precision voltage regulation and overvoltage protection in automotive electronics. It delivers a nominal Zener voltage of 30 V (28.0–32.0 V range at 2 mA), with 40 Ω maximum Zener impedance at 2 mA, 50 pF capacitance at 1 MHz, and 0.05 µA maximum reverse leakage at 21 V.
For engineers reviewing the BZT52HC30WFQ datasheet, BZT52HC30WFQ pinout, BZT52HC30WFQ application, or BZT52HC30WFQ equivalent, this device is selected for stable reference generation in engine control units, ECU power rail clamping, and CAN bus interface protection where low-profile packaging, thermal robustness (RθJA = 150 °C/W with 1 cm² cathode pad), and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its 30 V nominal Zener voltage is specified at IZT = 2 mA, with a positive temperature coefficient of +24.4 mV/°C - enabling predictable drift compensation in bias networks.
The SOD123F package supports high power dissipation (830 mW with optimized PCB layout) while maintaining a low profile (<1.15 mm height). Cathode band polarity marking and matte tin–annealed copper alloy terminals ensure reliable solderability per MIL-STD-202, Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.0–32.0 V at IZT = 2 mA - defines clamping threshold for 24 V automotive systems |
| Zener Impedance (ZZT) | 40 Ω max at 2 mA - ensures minimal output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | 0.05 µA max at VR = 21 V - guarantees low standby current in always-on circuits |
| Capacitance (CT) | 50 pF max at f = 1 MHz, VR = 0 V - limits signal distortion in high-speed data line protection |
| Power Dissipation (PD) | 830 mW with 1 cm² cathode pad - enables sustained operation in thermally constrained ECUs |
| Thermal Resistance (RθJA) | 150 °C/W with optimized pad - allows junction temperature rise ≤75 °C at 500 mW ambient dissipation |
| Temperature Coefficient (TC) | +24.4 mV/°C at IZT = 2 mA - supports predictable voltage drift compensation in wide-temperature environments |
Pinout & Package
Package: SOD123F - flat-lead, low-profile surface-mount package with molded green plastic housing (UL 94V-0), 0.015 g weight, and cathode band polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to system ground or lower-potential rail; forms reference return path during regulation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to protected rail; maintains stable 30 V reference when reverse voltage exceeds breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| SOD123F low-profile package | Height ≤1.15 mm enables use in space-constrained modules such as telematics and gateway ECUs |
| Green compound (halogen/antimony-free) | Meets automotive environmental standards: <900 ppm Br, <900 ppm Cl, <1000 ppm Sb |
| Matte tin–annealed terminals | Guarantees solder joint integrity and long-term intermetallic stability on FR-4 PCBs |
| IATF 16949 certified manufacturing | Ensures consistent lot-to-lot parametric performance and traceable PPAP documentation |
Applications
| Engine Control Unit (ECU) Power Rail Protection | CAN Transceiver Voltage Clamp |
|---|---|
Use Scenario: Protecting 24 V supply rails in diesel engine control modules against load dump transients up to 40 V. IC Role / Device Role / Timing Role: Zener clamping element placed between VCC and GND to shunt excess energy during ISO 7637-2 Pulse 5a events. Use Value: Limits rail voltage to ≤32 V with 40 Ω dynamic impedance, preventing damage to downstream MCU and analog front-end ICs. |
Use Scenario: Stabilizing common-mode voltage on CAN_H/CAN_L differential pair in vehicle infotainment gateways. IC Role / Device Role / Timing Role: Bidirectional clamp (paired with TVS) referenced to 30 V to suppress ESD and fast transient coupling onto bus lines. Use Value: 50 pF capacitance avoids signal edge degradation at 500 kbps CAN FD rates while maintaining ±30 V common-mode tolerance. |
| Body Control Module (BCM) Reference Generator | ADAS Camera Power Sequencing |
Use Scenario: Providing stable 30 V reference for linear regulators powering LED drivers and window motor controllers. IC Role / Device Role / Timing Role: Precision Zener used in feedback divider network of adjustable LDOs to set output voltage accuracy. Use Value: +24.4 mV/°C TC enables predictable offset correction across –40 °C to +125 °C operating range. |
Use Scenario: Enabling controlled power-up sequencing for multi-rail image sensors in surround-view camera systems. IC Role / Device Role / Timing Role: Voltage supervisor input reference for reset ICs monitoring 28–32 V auxiliary supply domains. Use Value: Tight 28.0–32.0 V tolerance ensures accurate reset assertion timing within ±1% of nominal rail voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5266BS-7-F (Diodes Inc.) | Same 30 V nominal Zener, but SOT-323 package; 300 mW PD, higher RθJA (330 °C/W) | Limited to low-power signal conditioning due to lower thermal capability | Select when board space is critical and power dissipation remains below 200 mW |
| BZX84-C30 (Nexperia) | 30 V Zener, SOT-23 package; 250 mW PD, 400 Ω ZZT, no AEC-Q101 qualification | Not suitable for automotive production; intended for industrial/commercial use only | Acceptable for non-automotive prototypes or cost-sensitive consumer designs without qualification requirements |
Compared with MMBZ5266BS-7-F and BZX84-C30, BZT52HC30WFQ uniquely combines AEC-Q101 qualification, 830 mW power handling, and SOD123F's thermal efficiency - making it the only option qualified for production automotive power rail protection where both reliability and thermal margin are mandatory.
Availability
BZT52HC30WFQ is available at Aetrix Electronics and suitable for engine control units, CAN bus interfaces, and body control modules requiring stable component supply with full automotive traceability and change control.
Supply support for BZT52HC30WFQ 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 portfolio, engineered specifically for voltage regulation and transient suppression in harsh automotive environments - not general-purpose replacement diodes.
FAQ
What is the maximum continuous reverse voltage this Zener can withstand without breakdown?
The BZT52HC30WFQ has a nominal Zener voltage of 30 V, with guaranteed breakdown occurring between 28.0 V and 32.0 V at 2 mA test current. Below 28.0 V, it behaves as a high-impedance reverse-biased diode with ≤0.05 µA leakage at 21 V. Sustained reverse voltage above 32.0 V will cause conduction and power dissipation limited by thermal design.
Does this part require derating at elevated ambient temperatures?
Yes - the device's power dissipation must be derated linearly above +25 °C ambient. With a thermal resistance of 150 °C/W (optimized pad), maximum allowable power drops to 500 mW at +60 °C ambient and 250 mW at +100 °C ambient, per the published derating curve in DS41143 Rev. 4-2.
Is the SOD123F package compatible with standard reflow profiles for lead-free soldering?
Yes - the SOD123F package uses matte tin–annealed copper alloy leads rated for lead-free reflow per J-STD-020. Its moisture sensitivity level is Class 1, eliminating bake requirements. Peak reflow temperature must not exceed 260 °C for ≤30 seconds, consistent with IPC/JEDEC J-STD-020D.2.
Can this Zener be used in series or parallel configurations for higher voltage or current handling?
Series connection is viable for higher voltage references (e.g., two 30 V devices yield ~60 V), but mismatched temperature coefficients cause unequal voltage sharing. Parallel use is not recommended - slight VZ variations lead to current hogging and thermal runaway. For higher current, use a single device with adequate PCB copper area per the 1 cm² cathode pad recommendation.
BZT52HC30WFQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±6.67%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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
BZT52HC30WFQ-7 FAQ
1.How can I place an order for BZT52HC30WFQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC30WFQ-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 BZT52HC30WFQ-7 reliable?
The price and inventory of BZT52HC30WFQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC30WFQ-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC30WFQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC30WFQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC30WFQ-7?
BZT52HC30WFQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC30WFQ-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 BZT52HC30WFQ-7?
For technical support, including BZT52HC30WFQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC30WFQ-7 requirements.
6.How does Aetrix verify that BZT52HC30WFQ-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC30WFQ-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 BZT52HC30WFQ-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC30WFQ-7?
All BZT52HC30WFQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC30WFQ-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 BZT52HC30WFQ-7 part is unused and in its original packaging.
Return procedure for BZT52HC30WFQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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