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Diodes Incorporated BZT52C33-13
- Part No.:
- BZT52C33-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C33-13.pdf
- Description:
- DIODE ZENER 33V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
BZT52C33-13 from Diodes Incorporated is a surface-mount 33 V ±6% Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with 80 Ω maximum Zener impedance at 2 mA test current, used for precision voltage regulation and overvoltage protection in DC power rails.
For engineers reviewing the BZT52C33-13 datasheet, BZT52C33-13 pinout, BZT52C33-13 application, or BZT52C33-13 equivalent, key selection criteria include nominal Zener voltage (33 V), tolerance (±6%), Zener impedance (80 Ω @ 2 mA), reverse leakage (0.1 µA @ 27.4 V), and thermal resistance (338 °C/W junction-to-ambient).
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance across the 33 V nominal range.
The device exhibits a positive temperature coefficient of +23.1 mV/°C near 33 V, enabling predictable drift compensation in multi-diode references. It is qualified to AEC-Q101 for automotive reliability and features matte tin–plated alloy 42 leads for robust solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V nominal, 31.0–35.0 V range at 2 mA - defines regulated output voltage tolerance band |
| Power Dissipation | 370 mW @ TA = +25°C - sets max continuous DC power in standard PCB layout |
| Zener Impedance (ZZT) | 80 Ω max @ IZT = 2 mA - determines AC regulation stiffness and ripple rejection |
| Reverse Leakage (IR) | 0.1 µA max @ VR = 27.4 V - ensures minimal quiescent current in standby regulation |
| Temperature Coefficient | +23.1 mV/°C @ 33 V - quantifies voltage drift per degree Celsius for thermal design margining |
| Package | SOD123 - 2-pin surface-mount outline with cathode band polarity marking and 0.010 g mass |
| RoHS Compliance | Fully lead-free, halogen- and antimony-free "Green" device per Diodes Inc. definitions |
Pinout & Package
Package: SOD123 - molded plastic case, UL 94V-0 flammability rating, moisture sensitivity level 1, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated rail; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage regulation input | Connected to higher-potential supply; clamps voltage to 33 V when reverse-biased beyond breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight Zener voltage distribution and repeatable impedance across production lots |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
| Matte tin–plated leads | Enables high-yield reflow soldering without whisker risk or intermetallic degradation |
| 10,000-piece tape-and-reel packaging (-13-F) | Optimized for high-volume automated placement on industrial and automotive PCBs |
Applications
| Industrial Power Supply Monitoring | Automotive Body Control Module (BCM) Reference |
|---|---|
|
Use Scenario: Monitoring 36 V battery-derived rails in programmable logic controllers to detect undervoltage faults. IC Role / Device Role / Timing Role: Zener voltage reference for comparator input threshold setting. Use Value: Stable 33 V clamp enables accurate 10% dropout detection despite ambient temperature swings from −40°C to +125°C. |
Use Scenario: Providing regulated bias to analog sensor signal conditioning circuits in BCM subassemblies. IC Role / Device Role / Timing Role: Precision shunt regulator for op-amp reference inputs. Use Value: Low 0.1 µA leakage at 27.4 V ensures <1 µW standby power draw in always-on sensor nodes. |
| Consumer USB-C PD Adapter Feedback | Medical Diagnostic Equipment Overvoltage Clamp |
|
Use Scenario: Secondary-side voltage feedback in isolated 20 V USB-C PD adapter designs. IC Role / Device Role / Timing Role: Zener-based error amplifier reference in optocoupler feedback loop. Use Value: 80 Ω Zener impedance minimizes feedback loop phase shift, preserving stability margins across line/load transients. |
Use Scenario: Protecting ADC front-end inputs from transient surges in portable ultrasound signal chains. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp on analog input protection network. Use Value: 33 V breakdown threshold aligns with 3.3 V ADC's 10× input scaling, limiting fault energy before TVS activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5265BLT1G | 33 V nominal, ±5% tolerance, 500 mW, SOT-23 package, 100 Ω ZZT @ 2 mA | Smaller footprint but higher thermal resistance (400 °C/W); requires tighter layout for same power handling | Select when board space is constrained and thermal derating can be accommodated via copper area |
| BZX84-C33 | 33 V nominal, ±5% tolerance, 300 mW, SOT-23 package, 90 Ω ZZT @ 5 mA | Lower power rating and different test current; less stable at low bias currents | Prefer for cost-sensitive consumer applications where 300 mW suffices and 5 mA bias is available |
Compared with MMBZ5265BLT1G and BZX84-C33, BZT52C33-13 offers superior thermal performance in SOD123, tighter Zener impedance control at low test current (2 mA), and AEC-Q101 qualification-making it optimal for automotive and industrial systems requiring long-term voltage stability under thermal stress.
Availability
BZT52C33-13 is available at Aetrix Electronics and suitable for industrial power monitoring, automotive body control modules, USB-C PD adapter feedback, and medical diagnostic equipment requiring stable component supply and AEC-Q101 compliance.
Supply support for BZT52C33-13 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.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for precision voltage regulation, overvoltage protection, and reference applications in space-constrained, thermally demanding environments.
FAQ
What is the maximum reverse voltage (VR) at which leakage remains ≤0.1 µA?
The datasheet specifies 0.1 µA maximum reverse current at VR = 27.4 V. This value is derived from the 33 V Zener's 21% derating margin (33 V × 0.83 ≈ 27.4 V) and reflects the voltage below which the device remains effectively non-conductive in regulation-critical bias networks.
Can BZT52C33-13 be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients at low voltages but positive coefficients above ~5.6 V; BZT52C33-13 has +23.1 mV/°C, causing thermal runaway if paralleled without individual ballast resistors. Use a single device with appropriate heatsinking instead.
Is the SOD123 package compatible with standard reflow profiles for lead-free soldering?
Yes-the matte tin finish meets MIL-STD-202 Method 208 solderability requirements and supports JEDEC J-STD-020 Class 1 (unlimited floor life) reflow profiles, including peak temperatures up to 260°C for 10 seconds.
Does the "-13-F" suffix indicate automotive qualification?
No-the "-13-F" denotes 10,000-piece tape-and-reel packaging with RoHS-compliant finish; automotive qualification requires the "Q" prefix (e.g., BZT52C33Q-13-F). BZT52C33-13 is commercial-grade but AEC-Q101 qualified per datasheet note.
BZT52C33-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
BZT52C33-13 FAQ
1.How can I place an order for BZT52C33-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C33-13 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 BZT52C33-13 reliable?
The price and inventory of BZT52C33-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C33-13 is usually 5 days.
3.What payment methods are accepted for BZT52C33-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C33-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C33-13?
BZT52C33-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C33-13 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 BZT52C33-13?
For technical support, including BZT52C33-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C33-13 requirements.
6.How does Aetrix verify that BZT52C33-13 is sourced from the original manufacturer or authorized distributors?
All BZT52C33-13 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 BZT52C33-13 meets industry standards.
7.What is the process for return or replacement of BZT52C33-13?
All BZT52C33-13 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C33-13, 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 BZT52C33-13 part is unused and in its original packaging.
Return procedure for BZT52C33-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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