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Diodes Incorporated BZT52C33S-7-F
- Part No.:
- BZT52C33S-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C33S-7-F.pdf
- Description:
- DIODE ZENER 33V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,015
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Product details
Overview
BZT52C33S-7-F from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 33 V, ±6.1% tolerance (31.0–35.0 V), 2 mA test current, 325 Ω maximum zener impedance at 2 mA, and 200 mW power dissipation in SOD323 package. It provides precision voltage regulation in low-power biasing and reference circuits for industrial sensor signal conditioning.
For engineers reviewing the BZT52C33S-7-F datasheet, BZT52C33S-7-F pinout, BZT52C33S-7-F application, or BZT52C33S-7-F equivalent, key selection criteria include zener voltage accuracy at 2 mA, thermal resistance (625 °C/W), reverse leakage (≤0.1 µA at 27.4 V), cathode polarity marking, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD323 package enables high-density PCB layouts and compatibility with automated reflow assembly.
The device exhibits a positive temperature coefficient of +23.1 mV/°C above 6 V, enabling predictable drift compensation in temperature-sensitive references. With 0.1 µA max reverse current at VR = 27.4 V and 100% humidity-rated moisture sensitivity level 1, it supports long-term stability in humid industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V nominal, 31.0–35.0 V range at IZT = 2 mA - defines regulated output voltage window under standard test condition |
| Power Dissipation (PD) | 200 mW - maximum continuous power handling on FR-4 board with recommended pad layout |
| Zener Impedance (ZZT) | 325 Ω max at f = 1 kHz, IZT = 2 mA - determines AC ripple rejection capability in shunt regulator designs |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 27.4 V - ensures minimal quiescent current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 625 °C/W - sets junction-to-ambient temperature rise per milliwatt dissipated on standard PCB |
| Temperature Coefficient | +23.1 mV/°C - quantifies voltage drift per degree Celsius above 25 °C ambient |
| Package | SOD323 - 1.3 mm × 1.7 mm surface-mount outline with cathode band polarity marking |
Pinout & Package
Package: SOD323 - ultra-compact plastic molded case (1.30 mm × 1.70 mm × 0.95 mm), matte tin-plated alloy 42 leadframe, cathode indicated by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-biased regulation; forms return path for zener current |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; connected to higher-potential rail to clamp voltage at VZ during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight VZ distribution and repeatable breakdown behavior across production lots |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and body electronics |
| Halogen- and antimony-free "Green" material | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant with global environmental directives |
| Moisture Sensitivity Level 1 | Zero bake requirement prior to reflow; supports unlimited floor life at ≤30 °C/60% RH |
Applications
| Industrial Sensor Biasing | Automotive ECU Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in factory automation PLC modules. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining 33 V across high-impedance bridge circuitry. Use Value: Enables <±0.5% measurement accuracy over –40 to +85 °C due to predictable +23.1 mV/°C TC and low 0.1 µA leakage. | Use Scenario: Supplying regulated reference for analog-to-digital converters in engine control units. IC Role / Device Role / Timing Role: Precision voltage clamp protecting ADC input against transients while setting full-scale reference. Use Value: AEC-Q101 qualification ensures operation through 1000+ thermal cycles; SOD323 footprint minimizes board space in dense ECU layouts. |
| Low-Power IoT Node Regulation | LED Driver Overvoltage Protection |
Use Scenario: Generating local 33 V rail for RF transceiver bias in battery-powered smart meter endpoints. IC Role / Device Role / Timing Role: Low-quiescent shunt regulator stabilizing LDO input under variable battery discharge profiles. Use Value: 200 mW rating and 625 °C/W RθJA allow passive thermal management without heatsinking in sealed enclosures. | Use Scenario: Clamping transient spikes on constant-current LED driver outputs in streetlight controllers. IC Role / Device Role / Timing Role: Fast-acting overvoltage suppressor diverting surge energy away from LED strings. Use Value: 325 Ω ZZT limits clamping voltage overshoot to <34.5 V during 100 ns transients, preventing LED degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5265BS-7-F | Zener voltage 33 V, but rated at 3 mA test current and 225 Ω ZZT; same SOD323 package | Higher test current shifts operating point - requires adjustment of series resistor for identical bias current | Select when tighter ZZT spec is required and 3 mA bias is acceptable in design |
| BZX384-C33,115 | 33 V Zener in SOD323, but 500 mW PD, 150 Ω ZZT, and no AEC-Q101 qualification | Higher power rating allows greater surge handling, but lacks automotive reliability validation | Choose for cost-sensitive industrial applications where AEC-Q101 is not mandated |
Compared with MMBZ5265BS-7-F and BZX384-C33,115, the BZT52C33S-7-F offers superior automotive qualification and tighter VZ tolerance at 2 mA, making it optimal for safety-critical biasing where long-term drift and thermal cycling performance are prioritized over raw power handling.
Availability
BZT52C33S-7-F is available at Aetrix Electronics and suitable for industrial sensor biasing, automotive ECU reference circuits, and low-power IoT node regulation requiring stable component supply across extended product lifecycles.
Supply support for BZT52C33S-7-F 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 North America.
The BZT52CxxS series belongs to Diodes' precision Zener diode portfolio designed specifically for space-constrained, high-reliability voltage reference and overvoltage protection applications in automotive and industrial systems.
FAQ
What is the maximum reverse voltage (VR) at which leakage remains ≤0.1 µA?
The BZT52C33S-7-F guarantees ≤0.1 µA reverse current at VR = 27.4 V, as specified in the Electrical Characteristics table. This value corresponds to 83% of the nominal 33 V zener voltage and serves as the upper limit for low-leakage operation before significant conduction begins.
Does this Zener diode support reflow soldering per JEDEC J-STD-020?
Yes - the BZT52C33S-7-F is qualified for lead-free reflow soldering per JEDEC J-STD-020, with Moisture Sensitivity Level 1 rating. No baking is required, and it withstands peak temperatures up to 260 °C for up to 60 seconds in standard Pb-free reflow profiles.
How does the +23.1 mV/°C temperature coefficient affect circuit design?
This positive coefficient means the zener voltage increases by 23.1 mV per degree Celsius rise above 25 °C. Designers must account for this drift in precision references - for example, a 50 °C ambient rise adds ~1.155 V to VZ, requiring compensation in feedback networks or selection of complementary TC components.
Can BZT52C33S-7-F replace BZT52C30S-7-F in an existing design?
No direct substitution is recommended without circuit review: BZT52C30S has 30 V nominal VZ (28.0–32.0 V), while BZT52C33S is 33 V (31.0–35.0 V). The 3 V shift alters bias points and may exceed voltage ratings of downstream components; series resistor values and thermal margins must be recalculated.
BZT52C33S-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±6%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 23.1 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
BZT52C33S-7-F FAQ
1.How can I place an order for BZT52C33S-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C33S-7-F 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 BZT52C33S-7-F reliable?
The price and inventory of BZT52C33S-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C33S-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C33S-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C33S-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C33S-7-F?
BZT52C33S-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C33S-7-F 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 BZT52C33S-7-F?
For technical support, including BZT52C33S-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C33S-7-F requirements.
6.How does Aetrix verify that BZT52C33S-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C33S-7-F 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 BZT52C33S-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C33S-7-F?
All BZT52C33S-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C33S-7-F, 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 BZT52C33S-7-F part is unused and in its original packaging.
Return procedure for BZT52C33S-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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