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Diodes Incorporated BZT52C3V3S-7
- Part No.:
- BZT52C3V3S-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C3V3S-7.pdf
- Description:
- DIODE ZENER 3.3V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,926
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Product details
Overview
BZT52C3V3S-7 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 3.3 V, 5 mA test current, 95 Ω maximum zener impedance at 1 kHz, 200 mW power dissipation, and SOD323 package-used for precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.
For engineers reviewing the BZT52C3V3S-7 datasheet, BZT52C3V3S-7 pinout, BZT52C3V3S-7 application, or BZT52C3V3S-7 equivalent, key selection criteria include zener voltage tolerance (±3.0% at 3.3 V), low reverse leakage (5 µA max at 1.0 V), thermal resistance (625 °C/W), AEC-Q101 qualification, and RoHS-compliant green packaging.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. It features planar die construction for consistent parametric performance and is optimized for automated SMT assembly on FR-4 PCBs using standard reflow profiles.
The device exhibits a negative temperature coefficient of −3.5 mV/°C, enabling predictable drift compensation in bias networks. Its 0.0049 g mass and SOD323 footprint support high-density layout in space-constrained consumer and automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.1–3.5 V range at IZT = 5 mA - ensures tight regulation for 3.3 V rail monitoring and clamping |
| Power Dissipation (PD) | 200 mW - supports continuous operation in low-current bias and protection circuits without heatsinking |
| Zener Impedance (ZZT) | 95 Ω max at 1 kHz - maintains low dynamic impedance for stable reference under small-signal AC perturbations |
| Reverse Leakage (IR) | 5 µA max at VR = 1.0 V - minimizes quiescent current loss in battery-powered sensing nodes |
| Thermal Resistance (RθJA) | 625 °C/W - defines junction-to-ambient rise per watt; requires minimal copper area for thermal management |
| Operating Temperature | −65 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
Pinout & Package
Package: SOD323 - ultra-compact surface-mount plastic case (1.30 mm × 1.70 mm × 0.90 mm), cathode-banded polarity, matte tin-plated alloy 42 leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias regulation; forms ground-referenced clamp point |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node (e.g., microcontroller VREF or ADC input); carries controlled reverse current |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable zener voltage distribution and low parametric shift across production lots |
| AEC-Q101 qualification | Validates reliability for automotive applications including body control modules and sensor interfaces |
| Halogen- and antimony-free "Green" molding compound | Meets strict environmental compliance (Br+Cl <1500 ppm, Sb <1000 ppm) without compromising thermal stability |
| SOD323 footprint compatibility | Enables drop-in replacement in legacy designs using JEDEC-standard 0805-equivalent land patterns |
Applications
| USB Power Monitoring | Automotive Cabin Sensor Biasing |
|---|---|
Use Scenario: Monitoring 5 V USB bus voltage via resistive divider into MCU ADC with internal 3.3 V reference. IC Role / Device Role / Timing Role: Zener diode provides stable 3.3 V reference for ADC scaling and overvoltage detection threshold. Use Value: Tight 3.1–3.5 V tolerance and low 5 µA leakage ensure accurate voltage measurement across temperature without calibration drift. | Use Scenario: Biasing NTC thermistor in HVAC cabin temperature sensor module operating at 12 V supply. IC Role / Device Role / Timing Role: Zener diode regulates 3.3 V bias rail for signal conditioning op-amp and microcontroller analog front-end. Use Value: AEC-Q101 qualification and −65 °C to +150 °C rating guarantee reliable operation across vehicle thermal cycles. |
| IoT Node Voltage Clamping | Industrial PLC Input Protection |
Use Scenario: Protecting ESP32 GPIO pins from ESD and transient overvoltage during wireless firmware updates. IC Role / Device Role / Timing Role: Zener diode acts as bidirectional clamp between I/O line and 3.3 V rail, shunting excess energy to ground. Use Value: 95 Ω zener impedance and fast response enable effective suppression of sub-100 ns transients without signal distortion. | Use Scenario: Safeguarding 24 V digital input channel against field-wiring faults and inductive kickback in factory automation controllers. IC Role / Device Role / Timing Role: Zener diode placed in series with current-limiting resistor to clamp input to 3.3 V logic level before optocoupler interface. Use Value: 200 mW power rating and robust SOD323 package withstand repeated 100 V/1 A surge events per IEC 61000-4-5 Level 3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | Zener voltage 3.3 V, but 350 mW PD, higher ZZT (150 Ω), SOT-23 package | Larger footprint and higher thermal mass; less suitable for ultra-dense layouts | Select when higher power handling is required and board space permits SOT-23 |
| BZX384-C3V3 | Zener voltage 3.3 V, 300 mW PD, 90 Ω ZZT, SOD-323 package, same marking code W3 | Identical form factor and electrical envelope; differs only in manufacturer-specific process and qualification | Drop-in alternative if Diodes stock is constrained; verify AEC-Q101 status per batch |
Compared with BZT52C3V3S-7, MMBZ5226BS-7-F offers greater power margin but sacrifices compactness and low-impedance regulation, while BZX384-C3V3 matches footprint and specs closely but lacks Diodes' green compound certification and may differ in long-term parametric stability.
Availability
BZT52C3V3S-7 is available at Aetrix Electronics and suitable for USB power monitoring, automotive cabin sensor biasing, IoT node voltage clamping, and industrial PLC input protection requiring stable component supply across automotive, industrial, and consumer design cycles.
Supply support for BZT52C3V3S-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing and test facilities across Asia and design centers in the US and Europe.
The BZT52CxxS series belongs to Diodes' high-reliability Zener diode product line, engineered for precision voltage reference and transient suppression in automotive, industrial, and portable electronics where AEC-Q101 compliance and green material content are mandatory.
FAQ
What is the maximum reverse voltage (VR) at which leakage current is specified for BZT52C3V3S-7?
The datasheet specifies a maximum reverse leakage current of 5 µA at VR = 1.0 V. This value is measured under standard conditions (TA = +25°C) and reflects the diode's ability to block current below its zener knee, critical for low-power standby operation in battery-backed systems.
Is BZT52C3V3S-7 suitable for use in automotive under-hood applications?
Yes-BZT52C3V3S-7 is qualified to AEC-Q101 standards and rated for operation from −65°C to +150°C. Its SOD323 package, green molding compound, and stable zener voltage drift (−3.5 mV/°C) make it appropriate for engine control unit sensors, lighting drivers, and powertrain subsystems exposed to extreme thermal cycling.
How does the SOD323 package affect thermal performance compared to larger packages like SOT-23?
The SOD323 package has a higher thermal resistance (RθJA = 625 °C/W) than SOT-23 (typically ~300–400 °C/W), limiting its usable power dissipation to 200 mW under standard FR-4 mounting. Designers must minimize local copper area and avoid adjacent heat sources to prevent junction overheating during sustained zener conduction.
Can BZT52C3V3S-7 be used as a substitute for a 3.3 V LDO in low-current applications?
No-it functions only as a shunt regulator and cannot source current like an LDO. It requires a series current-limiting resistor and only regulates when reverse-biased above its zener voltage. Use is limited to reference generation, voltage clamping, and low-power biasing-not active voltage conversion or load regulation.
BZT52C3V3S-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±6%
- Power - Max:
- 200 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZT52C3V3S-7 FAQ
1.How can I place an order for BZT52C3V3S-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C3V3S-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 BZT52C3V3S-7 reliable?
The price and inventory of BZT52C3V3S-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C3V3S-7 is usually 5 days.
3.What payment methods are accepted for BZT52C3V3S-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C3V3S-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C3V3S-7?
BZT52C3V3S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C3V3S-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 BZT52C3V3S-7?
For technical support, including BZT52C3V3S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C3V3S-7 requirements.
6.How does Aetrix verify that BZT52C3V3S-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C3V3S-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 BZT52C3V3S-7 meets industry standards.
7.What is the process for return or replacement of BZT52C3V3S-7?
All BZT52C3V3S-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C3V3S-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 BZT52C3V3S-7 part is unused and in its original packaging.
Return procedure for BZT52C3V3S-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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