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Diodes Incorporated BZT52C33-7-F
- Part No.:
- BZT52C33-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C33-7-F.pdf
- Description:
- DIODE ZENER 33V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:21,448
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Product details
Overview
BZT52C33-7-F from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 33 V, ±6% tolerance (31.0–35.0 V), 500 mW power dissipation at TL = +75°C, and 370 mW at TA = +25°C, packaged in SOD123. It delivers stable voltage regulation in low-power supply rails and overvoltage protection circuits for industrial sensor interfaces.
For engineers reviewing the BZT52C33-7-F datasheet, BZT52C33-7-F pinout, BZT52C33-7-F application, or BZT52C33-7-F equivalent, key selection criteria include zener voltage accuracy at 2 mA test current, low dynamic impedance (80 Ω @ 2 mA), temperature coefficient (+23.1 mV/°C), reverse leakage (<0.1 µA @ 27.4 V), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low leakage, while the SOD123 package supports high-density PCB layouts and automated reflow assembly.
The device exhibits a positive temperature coefficient of +23.1 mV/°C, enabling predictable drift compensation in multi-diode reference networks. With a maximum zener impedance of 325 Ω at knee current (0.5 mA) and 80 Ω at rated test current (2 mA), it provides tight regulation in precision shunt regulator topologies.
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 under standard bias |
| Power Dissipation | 370 mW at TA = +25°C - sets maximum continuous DC power in free-air operation |
| Zener Impedance | 80 Ω @ IZT = 2 mA - determines regulation stiffness against load current changes |
| Reverse Leakage | <0.1 µA @ VR = 27.4 V - ensures minimal quiescent current in standby protection circuits |
| Temperature Coefficient | +23.1 mV/°C - quantifies voltage drift per degree Celsius rise, critical for thermal stability |
| Package | SOD123 - 2-pin surface-mount outline with cathode band marking and 0.010 g mass |
Pinout & Package
Package: SOD123 - molded plastic case, UL 94V-0 flammability rating, matte tin-plated alloy 42 leadframe, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to input rail; clamps voltage to 33 V when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable breakdown voltage and low parameter spread across production lots |
| AEC-Q101 qualification | Validates reliability for automotive electronics including engine control and body modules |
| Lead-free & halogen-free | Meets RoHS 2 (2011/65/EU) and green compound requirements (<900 ppm Br/Cl, <1000 ppm Sb) |
| Moisture sensitivity Level 1 | Enables direct placement without baking, reducing manufacturing overhead |
Applications
| Industrial Sensor Signal Conditioning | Automotive ECU Power Rail Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter front-end op-amps in factory automation systems. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 33 V bias point for analog signal chain calibration. Use Value: Maintains ±0.5% reference stability over –40°C to +125°C ambient, minimizing zero-drift errors in 16-bit ADC systems. |
Use Scenario: Clamping transient spikes on 3.3 V or 5 V microcontroller supply lines during load dump events in body control modules. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing energy surges up to 370 mW without latch-up. Use Value: Limits rail excursion to ≤35 V for <500 ns, preventing damage to downstream CAN transceivers and flash memory. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Biasing |
Use Scenario: Providing secondary-side voltage feedback in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener-based optocoupler bias source setting primary-side regulation threshold. Use Value: Enables ±2% output voltage accuracy across line/load variations due to low 80 Ω dynamic impedance. |
Use Scenario: Generating stable bias for photodiode preamplifiers in portable ultrasound probe front-ends. IC Role / Device Role / Timing Role: Low-noise voltage reference establishing DC operating point for transimpedance amplifiers. Use Value: Delivers <0.1 µA leakage at 27.4 V, reducing input offset drift and preserving SNR in sub-picoamp signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5265BLT1G | Zener voltage 33 V (±5%), 350 mW PD, SOT-23 package, higher thermal resistance (RθJA = 350°C/W) | Higher board-level thermal impedance limits sustained power handling in compact layouts | Select when footprint compatibility with existing SOT-23 designs is required and peak pulse energy is low |
| BZX84-C33 | Zener voltage 33 V (±5%), 300 mW PD, SOT-23, no AEC-Q101 qualification, higher ZZK (130 Ω @ 0.2 mA) | Lacks automotive qualification and exhibits greater knee impedance, reducing low-current regulation fidelity | Prefer for cost-sensitive commercial applications where AEC-Q101 is not mandated and 2 mA minimum bias is guaranteed |
Compared with MMBZ5265BLT1G and BZX84-C33, BZT52C33-7-F offers superior thermal performance (338°C/W RθJA), AEC-Q101 compliance, and tighter low-current regulation-making it optimal for space-constrained automotive and industrial shunt references requiring long-term stability.
Availability
BZT52C33-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive ECU protection, and medical diagnostic equipment requiring stable component supply and full traceability.
Supply support for BZT52C33-7-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 consumer markets since 1959.
The BZT52 series targets general-purpose, medium-current Zener regulation with emphasis on manufacturability, AEC-Q101 compliance, and consistency across voltage grades from 2.0 V to 51 V.
FAQ
What is the maximum reverse voltage (VR) before significant leakage occurs?
At VR = 27.4 V, reverse current is guaranteed ≤0.1 µA. Beyond this, leakage rises nonlinearly; the device enters full breakdown near 31.0 V. For reliable clamping, operate below 27.4 V in standby and allow controlled conduction only during overvoltage events.
Can BZT52C33-7-F be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients in parallel configurations, causing current hogging and thermal runaway. Use a single device with appropriate heatsinking or select a higher-power alternative like the 1N5355B (33 V, 5 W) for >370 mW needs.
Is the SOD123 package compatible with standard reflow profiles?
Yes-the SOD123 package is qualified for lead-free reflow per J-STD-020, with peak temperature up to 260°C. Its Level 1 moisture sensitivity eliminates bake requirements, supporting direct placement in high-volume SMT lines without process modification.
How does the +23.1 mV/°C temperature coefficient affect circuit design?
This positive coefficient means output voltage increases ~23 mV per °C rise. In precision references, pair with a negative-TC component (e.g., forward-biased diode) to achieve net zero drift; in clamping, account for ~0.7 V rise over –40°C to +125°C ambient range.
BZT52C33-7-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%
- Power - Max:
- 500 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-123
BZT52C33-7-F FAQ
1.How can I place an order for BZT52C33-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C33-7-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 BZT52C33-7-F reliable?
The price and inventory of BZT52C33-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C33-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C33-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C33-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C33-7-F?
BZT52C33-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C33-7-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 BZT52C33-7-F?
For technical support, including BZT52C33-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C33-7-F requirements.
6.How does Aetrix verify that BZT52C33-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C33-7-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 BZT52C33-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C33-7-F?
All BZT52C33-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C33-7-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 BZT52C33-7-F part is unused and in its original packaging.
Return procedure for BZT52C33-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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