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Diodes Incorporated BZT52HC3V3WF-7
- Part No.:
- BZT52HC3V3WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC3V3WF-7.pdf
- Description:
- DIODE ZENER 3.3V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,188
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Product details
Overview
BZT52HC3V3WF-7 from Diodes Incorporated is a surface-mount Zener diode with nominal 3.3 V zener voltage, 5 mA test current, and 95 Ω maximum zener impedance at test condition. It features SOD123F (Type B) package, AEC-Q101 qualification for automotive reliability, and operates across −65 °C to +150 °C. It serves as a precision voltage reference or overvoltage clamp in low-power analog sensing circuits.
For engineers reviewing the BZT52HC3V3WF-7 datasheet, BZT52HC3V3WF-7 pinout, BZT52HC3V3WF-7 application, or BZT52HC3V3WF-7 equivalent, key selection factors include its 3.1–3.5 V zener voltage range, −3.5 to 0.0 mV/°C temperature coefficient, 450 pF capacitance at 0 V, 5 µA maximum reverse leakage at 1 V, and thermal resistance of 150 °C/W under enhanced pad layout.
Technical Context
This Zener diode operates in reverse breakdown mode to regulate or clamp voltage at a stable 3.3 V level under controlled current conditions. Its low dynamic impedance (95 Ω @ 5 mA) ensures minimal voltage deviation during load transients, while the negative-to-zero temperature coefficient enables predictable drift behavior in ambient temperature variations.
The device uses a planar epitaxial construction with cathode band polarity marking and matte tin–annealed copper alloy terminals. Its SOD123F package supports high power dissipation (830 mW with 1 cm² cathode pad), making it suitable for space-constrained automotive and industrial PCBs requiring AEC-Q101 compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage Range | 3.1 V to 3.5 V at 5 mA - defines usable regulation window under standard test conditions |
| Zener Impedance | 95 Ω max @ 5 mA - limits output voltage variation under changing load current |
| Temperature Coefficient | −3.5 to 0.0 mV/°C @ 5 mA - determines voltage drift magnitude and direction across operating temperature |
| Reverse Leakage Current | 5 µA max @ 1 V - sets minimum quiescent power loss in standby clamping applications |
| Total Capacitance | 450 pF max @ 1 MHz, 0 V - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| Power Dissipation | 830 mW max with 1 cm² cathode pad - enables higher continuous current handling than standard FR-4 mounting |
| Thermal Resistance | 150 °C/W junction-to-ambient - requires thermal pad design for sustained operation above 125 °C ambient |
Pinout & Package
Package: SOD123F (Type B), flat lead, molded plastic case with UL 94V-0 flammability rating and cathode band polarity marking. Weight: ~0.015 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-biased regulation; forms reference ground return path |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential rail; delivers stabilized 3.3 V when reverse biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meeting RoHS 2 and JEDEC green standards |
| Low-profile SOD123F | Height ≤ 0.85 mm enables use in ultra-thin modules and dense automotive control units |
| Enhanced thermal performance | 150 °C/W RθJA with 1 cm² cathode pad allows >2× power handling vs. standard FR-4 layout |
Applications
| Automotive Cabin Sensors | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Voltage reference for 3.3 V ADC front-end in seat occupancy or HVAC sensor nodes. IC Role / Device Role / Timing Role: Provides stable 3.3 V bias to op-amp buffer and ADC reference divider network. Use Value: Maintains ±1.2% reference accuracy across −40 °C to +125 °C due to tight 3.1–3.5 V zener tolerance and low TC. |
Use Scenario: Overvoltage clamp on 4–20 mA loop receiver inputs exposed to field wiring surges. IC Role / Device Role / Timing Role: Shunts transient energy above 3.5 V to protect downstream instrumentation amplifier. Use Value: Limits input excursion to safe levels with 5 µA leakage at 1 V, minimizing offset error in precision current measurement. |
| Medical Wearable Battery Monitoring | Smart Home Smoke Detector MCU Supply |
Use Scenario: Low-current battery voltage monitoring circuit powered by coin cell in patch-style monitors. IC Role / Device Role / Timing Role: Zener-based voltage divider feeding comparator threshold for end-of-life detection. Use Value: Draws only 5 µA at 1 V reverse bias, extending battery life beyond 12 months in always-on operation. |
Use Scenario: Standby supply rail stabilization for ARM Cortex-M0+ MCU in battery-backed smoke alarms. IC Role / Device Role / Timing Role: Clamps brown-out reset line to prevent false triggers during alkaline battery voltage sag. Use Value: Responds within nanoseconds to transients up to 830 mW peak power, ensuring deterministic reset behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ3V3T1G | Same 3.3 V nominal, but SOD-123 package (not SOD123F); 300 mW PD; 100 Ω ZZT | Limited to non-automotive consumer designs due to lack of AEC-Q101 qualification | Select when cost sensitivity outweighs automotive reliability requirements and thermal margin is sufficient |
| BZX384-C3V3 | SOD-323 package; 250 mW PD; tighter 3.12–3.48 V range; 90 Ω ZZT | Lower power handling restricts use to sub-10 mA regulation; unsuitable for surge clamping | Prefer where board space is critical and thermal load remains below 250 mW average |
Compared with MMSZ3V3T1G and BZX384-C3V3, BZT52HC3V3WF-7 delivers superior thermal capability (830 mW), automotive qualification, and consistent low-impedance regulation-making it optimal for safety-critical or thermally demanding embedded systems.
Availability
BZT52HC3V3WF-7 is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial PLC analog inputs, and medical wearable battery monitoring requiring stable component supply and AEC-Q101 compliance.
Supply support for BZT52HC3V3WF-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 the Americas.
The BZT52HC series belongs to Diodes' AEC-Q101-qualified Zener diode product line, engineered specifically for voltage regulation and transient suppression in automotive electronics, industrial controls, and high-reliability portable devices.
FAQ
What is the maximum reverse voltage this Zener can safely clamp without damage?
The absolute maximum reverse voltage is not specified as a standalone rating; instead, safe operation is defined by power dissipation limits. At 25 °C ambient with 1 cm² cathode pad, the device sustains up to 830 mW, corresponding to ~250 mA at 3.3 V. Exceeding this causes thermal runaway. Derating is required above 25 °C per the 150 °C/W thermal resistance curve.
Does this part have a specified Zener knee current or minimum regulation current?
Yes-the datasheet specifies IZK = 1 mA with ZZK = 500 Ω max. This defines the lowest current at which the diode maintains predictable breakdown behavior. Below 1 mA, voltage regulation degrades significantly, and reverse leakage dominates conduction.
Can BZT52HC3V3WF-7 be used in place of a 3.3 V LDO for powering logic?
No-it is not a voltage regulator IC and lacks current-limiting or dropout control. It provides passive voltage reference or clamping only. Attempting to source load current directly will cause excessive voltage droop and thermal failure unless external series resistance strictly limits current to ≤5 mA under worst-case conditions.
Is the cathode band orientation consistent across all BZT52HC-series reels?
Yes-every unit features a single black cathode band on the top surface aligned with the cathode terminal, per SOD123F mechanical drawing DS36891 Rev. 4-2. The band is visible in top-view inspection and matches the polarity marking shown in Figure 3 of the datasheet.
BZT52HC3V3WF-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):
- 3.3 V
- Tolerance:
- ±6.06%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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
BZT52HC3V3WF-7 FAQ
1.How can I place an order for BZT52HC3V3WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC3V3WF-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 BZT52HC3V3WF-7 reliable?
The price and inventory of BZT52HC3V3WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC3V3WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC3V3WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC3V3WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC3V3WF-7?
BZT52HC3V3WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC3V3WF-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 BZT52HC3V3WF-7?
For technical support, including BZT52HC3V3WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC3V3WF-7 requirements.
6.How does Aetrix verify that BZT52HC3V3WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC3V3WF-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 BZT52HC3V3WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC3V3WF-7?
All BZT52HC3V3WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC3V3WF-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 BZT52HC3V3WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC3V3WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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