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Diodes Incorporated BZT52C33Q-7-F
- Part No.:
- BZT52C33Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C33Q-7-F.pdf
- Description:
- DIODE ZENER 33V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BZT52C33Q-7-F from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode with nominal 33 V zener voltage (31.0–35.0 V range), 500 mW power dissipation at TL = +75°C, 2 mA test current, and 80 Ω maximum zener impedance at 1 kHz - used for precision voltage regulation and overvoltage protection in automotive power rails and sensor interface circuits.
For engineers reviewing the BZT52C33Q-7-F datasheet, BZT52C33Q-7-F pinout, BZT52C33Q-7-F application, or BZT52C33Q-7-F equivalent, key selection criteria include its SOD123 package compatibility, ±3% zener tolerance at 2 mA, low 0.1 µA reverse leakage at 27.4 V, and automotive-grade qualification per AEC-Q101 for under-hood electronics.
Technical Context
This Zener diode operates in reverse breakdown mode to clamp or regulate voltage at a stable 33 V level under controlled current conditions. Its planar die construction ensures consistent breakdown characteristics and thermal stability across temperature ranges from –65°C to +150°C.
The device exhibits a positive temperature coefficient of +23.1 mV/°C near its nominal zener voltage, enabling predictable drift behavior in temperature-sensitive bias networks. Its 338°C/W junction-to-ambient thermal resistance requires careful PCB copper pad design to maintain safe operating temperatures at rated power.
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 precise clamping threshold for overvoltage protection |
| Power Dissipation (PD) | 500 mW at TL = +75°C - sets maximum continuous power handling on lead-attached PCB layout |
| Zener Impedance (ZZT) | 80 Ω max at f = 1 kHz - determines AC regulation accuracy and ripple rejection capability |
| Reverse Leakage (IR) | 0.1 µA max at VR = 27.4 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 338 °C/W - requires ≥1 inch² FR-4 copper pad to sustain full power without exceeding 150°C junction temperature |
| Operating Temperature | –65°C to +150°C - supports under-hood automotive environments and industrial control enclosures |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking, 0.010 g weight, UL 94V-0 flammability rating, and matte tin-plated Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference node | Connected to lower-potential side of regulated circuit; forms reference ground for shunt regulation |
| Cathode | Reverse-biased breakdown terminal | Connected to higher-potential rail; conducts when voltage exceeds 33 V to clamp transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| SOD123 package footprint | Enables automated pick-and-place assembly and compact board layouts (2.65 mm × 1.55 mm × 1.05 mm) |
| Lead-free & halogen-free construction | Fully RoHS-compliant with <900 ppm Br/Cl and <1000 ppm Sb - meets automotive environmental standards |
| Low thermal resistance (RθJL = 150 °C/W) | Supports reliable heat transfer to PCB leads, improving long-term stability in thermally stressed environments |
Applications
| Automotive Power Rail Protection | Industrial Sensor Biasing |
|---|---|
Use Scenario: Clamping transient spikes on 24 V battery-fed ECUs during load dump events. IC Role / Device Role / Timing Role: Shunt regulator providing fast-response overvoltage protection for microcontroller power inputs. Use Value: Limits peak voltage to ≤35 V using 33 V zener threshold and 80 Ω dynamic impedance, preventing IC latch-up. |
Use Scenario: Establishing stable reference voltage for analog front-end amplifiers in pressure sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric signal conditioning circuits. Use Value: Delivers ±3% tolerance and <0.1 µA leakage at 27.4 V, minimizing offset error in high-impedance bias networks. |
| LED Driver Current Regulation | Programmable Logic Supply Clamp |
Use Scenario: Stabilizing bias voltage for constant-current LED driver ICs in exterior lighting modules. IC Role / Device Role / Timing Role: Voltage reference element setting current-sense amplifier threshold. Use Value: Maintains regulation within 31–35 V range across –40°C to +125°C, ensuring consistent LED brightness. |
Use Scenario: Protecting FPGA I/O banks from ESD-induced overvoltage during hot-plug operations. IC Role / Device Role / Timing Role: Fast-acting clamp limiting input voltage excursion beyond absolute maximum ratings. Use Value: Responds within nanoseconds to transients >33 V while dissipating up to 500 mW without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5263B-TP (Micro Commercial) | 33 V nominal, ±5% tolerance, 500 mW rating, SOD123 package, but not AEC-Q101 qualified | Lacks automotive qualification; suitable only for commercial-grade power supplies and consumer electronics | Select when cost sensitivity outweighs automotive reliability requirements and AEC-Q101 compliance is not mandated |
| BZX84-C33 (Nexperia) | 33 V nominal, ±5% tolerance, 300 mW rating, SOT23 package - smaller footprint but lower power handling | Lower power dissipation limits use to low-current bias networks; incompatible pinout prevents drop-in replacement | Choose for space-constrained designs where 300 mW suffices and SOT23 placement is preferred over SOD123 |
Compared with MMSZ5263B-TP and BZX84-C33, BZT52C33Q-7-F provides tighter 31–35 V tolerance, AEC-Q101 validation, and higher 500 mW thermal capability in the industry-standard SOD123 footprint - making it the sole option for automotive-grade 33 V shunt regulation requiring production traceability and extended temperature operation.
Availability
BZT52C33Q-7-F is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor biasing, LED driver regulation, and FPGA I/O clamping requiring stable component supply with full AEC-Q101 documentation and lot-level traceability.
Supply support for BZT52C33Q-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, specializing in high-reliability components for automotive, industrial, and computing markets since 1959.
The BZT52C series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage before breakdown for BZT52C33Q-7-F?
The BZT52C33Q-7-F has a nominal zener voltage of 33 V with a guaranteed range of 31.0 V to 35.0 V at 2 mA test current. Breakdown begins within this range; operation below 31.0 V ensures no significant reverse conduction. The device is not rated for sustained reverse voltage above 35.0 V.
Can BZT52C33Q-7-F replace BZT52C30Q-7-F in a 30 V circuit?
No - BZT52C33Q-7-F has a minimum zener voltage of 31.0 V, exceeding the 28.0–32.0 V range of BZT52C30Q-7-F. Substituting it risks undershooting regulation targets or failing to clamp at intended thresholds. Use only if circuit tolerances accommodate ≥31.0 V clamping.
Is the SOD123 package compatible with standard reflow profiles?
Yes - the SOD123 package is qualified for lead-free reflow per J-STD-020, supporting peak temperatures up to 260°C. Its matte tin finish ensures solderability, and moisture sensitivity level 1 eliminates bake requirements prior to assembly.
Does BZT52C33Q-7-F support bidirectional transient suppression?
No - it is a unidirectional Zener diode with cathode-band polarity. It conducts only in reverse breakdown (cathode positive relative to anode). For bidirectional protection, a TVS diode pair or dedicated bidirectional TVS device is required.
BZT52C33Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±6.06%
- Power - Max:
- 370 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52C33Q-7-F FAQ
1.How can I place an order for BZT52C33Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C33Q-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 BZT52C33Q-7-F reliable?
The price and inventory of BZT52C33Q-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 BZT52C33Q-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C33Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C33Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C33Q-7-F?
BZT52C33Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C33Q-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 BZT52C33Q-7-F?
For technical support, including BZT52C33Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C33Q-7-F requirements.
6.How does Aetrix verify that BZT52C33Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C33Q-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 BZT52C33Q-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C33Q-7-F?
All BZT52C33Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C33Q-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 BZT52C33Q-7-F part is unused and in its original packaging.
Return procedure for BZT52C33Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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