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Diodes Incorporated BZX84C33-7-F
- Part No.:
- BZX84C33-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C33-7-F.pdf
- Description:
- DIODE ZENER 33V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:12,235
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Product details
Overview
BZX84C33-7-F from Diodes Incorporated is a 33V, ±3.0V tolerance, 350mW surface-mount Zener diode in SOT23 package, designed for precision voltage regulation and overvoltage protection in low-power analog circuits. It delivers 23.1V nominal clamping at 2mA test current, exhibits 325Ω dynamic impedance at 2mA, and maintains stable operation from –65°C to +150°C - deployed in power supply feedback loops and sensor biasing networks.
For engineers reviewing the BZX84C33-7-F datasheet, BZX84C33-7-F pinout, BZX84C33-7-F application, or BZX84C33-7-F equivalent, key selection criteria include Zener voltage tolerance (±3.0V), thermal resistance (357°C/W), reverse leakage (<0.1µA @ 27.4V), temperature coefficient (+2.5mV/°C), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 33V at 2mA test current (IZT), exhibiting a positive temperature coefficient of +2.5mV/°C - enabling predictable drift compensation in voltage reference designs. Its 325Ω Zener impedance at IZT ensures minimal output variation under load transients.
The device uses planar die construction in a molded plastic SOT23 case rated UL 94V-0, with matte tin-plated Alloy 42 leads solderable per MIL-STD-202. Moisture sensitivity level is Level 1, supporting standard reflow profiles without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33V nominal, 31.0–35.0V range at 2mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation | 350mW at ambient temperature - sets maximum continuous power handling in PCB-mounted applications |
| Zener Impedance (ZZT) | 325Ω at 2mA - determines regulation stiffness and AC ripple rejection in reference circuits |
| Reverse Leakage (IR) | <0.1µA at 27.4V - ensures negligible standby current in battery-powered voltage monitors |
| Temperature Coefficient | +2.5mV/°C - enables predictable VZ drift for temperature-compensated references |
| Thermal Resistance (RθJA) | 357°C/W - quantifies junction-to-ambient heat rise under full power, critical for thermal design |
| Operating Temperature | –65°C to +150°C - supports deployment in under-hood automotive and industrial environments |
Pinout & Package
Package: SOT23 - compact 3-pin surface-mount plastic package with 0.915mm lead pitch, UL 94V-0 flammability rating, and 0.008g mass. Designed for automated pick-and-place assembly and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; voltage referenced to this pin during regulation |
| No Connect (Pin 3) | Internal die attach flag | Electrically isolated; serves mechanical anchoring only - must remain floating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements - suitable for engine control and ADAS modules |
| Green molding compound | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - meets RoHS 3 and automotive environmental mandates |
| Planar die construction | Enables tight Zener voltage tolerance (±3.0V) and repeatable breakdown characteristics across production lots |
| Low moisture sensitivity (Level 1) | Eliminates pre-bake requirement before reflow - reduces manufacturing cost and process complexity |
| Matte tin lead finish | Ensures reliable solder wetting and intermetallic formation per MIL-STD-202 Method 208 |
Applications
| Automotive Sensor Biasing | Industrial Power Supply Feedback |
|---|---|
Use Scenario: Providing stable 33V bias to Hall-effect position sensors in transmission control units. IC Role / Device Role / Timing Role: Voltage reference and noise suppression element in analog front-end circuitry. Use Value: Maintains sensor accuracy across –40°C to +125°C ambient with <0.1µA leakage, minimizing offset drift. |
Use Scenario: Regulating feedback voltage in isolated flyback converters for PLC I/O modules. IC Role / Device Role / Timing Role: Precision shunt regulator in optocoupler-coupled secondary-side feedback path. Use Value: Delivers 33V reference with ±3.0V tolerance and 325Ω impedance, ensuring <±1% output regulation under line/load variation. |
| Medical Instrument Reference | Consumer Audio DC-DC Monitoring |
Use Scenario: Generating calibrated reference for ADC input scaling in portable ECG monitors. IC Role / Device Role / Timing Role: Low-drift voltage clamp in signal conditioning chain prior to analog-to-digital conversion. Use Value: +2.5mV/°C tempco allows predictable correction in firmware; AEC-Q101 grade supports long-term field reliability. |
Use Scenario: Monitoring 33V rail integrity in Class-D amplifier power stages. IC Role / Device Role / Timing Role: Overvoltage detection element triggering shutdown logic when rail exceeds safe threshold. Use Value: Fast response to transient surges due to low capacitance (<2pF), preventing MOSFET gate oxide damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5263BS-7-F | 33V nominal, 200mW rating, 700Ω Zener impedance at 20mA - lower power, higher impedance | Not AEC-Q101 qualified; suited for consumer-grade non-automotive use only | Select when cost sensitivity outweighs automotive qualification and thermal performance needs |
| BZX84-C33,115 | 33V nominal, 350mW, SOT23 package but with different marking code and packaging (10k/reel vs. 3k/reel) | Same electrical specs and qualification; differs only in tape-and-reel quantity and date-code marking format | Choose for volume procurement where reel size aligns with SMT line setup requirements |
Compared with MMBZ5263BS-7-F, BZX84C33-7-F offers 75% higher power handling and 54% lower Zener impedance - critical for stable regulation under varying loads. Against BZX84-C33,115, it shares identical performance but differs in packaging logistics and traceability formatting for OEM supply chain compliance.
Availability
BZX84C33-7-F is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power supply feedback, and medical instrument reference applications requiring stable component supply, AEC-Q101 compliance, and RoHS 3–conformant green materials.
Supply support for BZX84C33-7-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 BZX84 series belongs to Diodes' precision Zener diode product line, engineered specifically for high-reliability voltage regulation and overvoltage protection in automotive, industrial, and medical systems where tight tolerance and thermal stability are essential.
FAQ
What is the maximum reverse voltage (VR) rating for BZX84C33-7-F?
The maximum reverse voltage (VR) is 27.4V - defined as the voltage at which reverse leakage current reaches 0.1µA. This value is 83% of the nominal Zener voltage (33V) and serves as the practical upper limit for non-breakdown operation in clamping or sensing configurations.
Is BZX84C33-7-F suitable for use in automotive under-hood applications?
Yes - it is fully qualified to AEC-Q101 standards, rated for –65°C to +150°C operating temperature, and constructed with halogen-free green molding compound. These attributes meet stringent requirements for engine control units, transmission sensors, and body electronics exposed to high thermal stress.
How does the temperature coefficient affect regulation accuracy over temperature?
With a +2.5mV/°C coefficient, the Zener voltage increases by 2.5mV per degree Celsius rise. Over a 100°C span (–40°C to +60°C), this results in a +250mV shift - approximately 0.76% of 33V - enabling predictable calibration compensation in reference designs.
Can BZX84C33-7-F replace BZX84C33LT1G in an existing design?
Yes - both are 33V Zener diodes in SOT23 packages with identical electrical specifications (31.0–35.0V VZ, 325Ω ZZT, 350mW PD). The -7-F suffix denotes Diodes Incorporated's standard tape-and-reel packaging; LT1G is ON Semiconductor's equivalent part number and packaging variant.
BZX84C33-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±6%
- Power - Max:
- 300 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:
- SOT-23-3
BZX84C33-7-F FAQ
1.How can I place an order for BZX84C33-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C33-7-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 BZX84C33-7-F reliable?
The price and inventory of BZX84C33-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C33-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C33-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C33-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C33-7-F?
BZX84C33-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C33-7-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 BZX84C33-7-F?
For technical support, including BZX84C33-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C33-7-F requirements.
6.How does Aetrix verify that BZX84C33-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C33-7-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 BZX84C33-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C33-7-F?
All BZX84C33-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C33-7-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 BZX84C33-7-F part is unused and in its original packaging.
Return procedure for BZX84C33-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C33-7-F Tags
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