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Diodes Incorporated BZT52C33-7
- Part No.:
- BZT52C33-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C33-7.pdf
- Description:
- DIODE ZENER 33V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,974
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Product details
Overview
BZT52C33-7 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, 2 mA test current, and 325 Ω maximum zener impedance at 1 kHz - used for precision voltage regulation and overvoltage protection in low-power analog signal conditioning circuits.
For engineers reviewing the BZT52C33-7 datasheet, BZT52C33-7 pinout, BZT52C33-7 application, or BZT52C33-7 equivalent, key selection criteria include zener voltage accuracy at 2 mA, thermal resistance (RθJA = 338 °C/W), SOD123 package compatibility with automated assembly, 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 mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent voltage regulation, while the SOD123 package supports high-density PCB layouts and reflow soldering.
The device exhibits a negative temperature coefficient of −2 mV/°C near 33 V, enabling predictable drift compensation in temperature-sensitive references. It delivers 23.1 V minimum zener voltage at 0.5 mA and 27.4 V typical at 2 mA, with ≤0.1 µA reverse current up to 27.4 V - confirming tight regulation in low-current bias networks.
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 stable regulation point for feedback or clamp circuits |
| Power Dissipation (PD) | 500 mW at lead temperature TL = +75°C - sets maximum continuous power handling on FR-4 with thermal pad |
| Zener Impedance (ZZT) | 325 Ω max at f = 1 kHz, IZT = 2 mA - indicates voltage stability under small-signal AC ripple |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 27.4 V - ensures minimal error current in high-impedance reference dividers |
| Thermal Resistance (RθJA) | 338 °C/W - determines junction-to-ambient temperature rise per watt on standard PCB layout |
| Operating Temperature | −65 °C to +150 °C - supports extended industrial and automotive under-hood environments |
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 for reliable solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to ground or lower-potential rail in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply via series resistor; provides stable 33 V reference when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Lead-free & RoHS compliant | Fully compliant with EU Directive 2011/65/EU; no intentionally added lead or halogens |
| Automated assembly compatible | SOD123 footprint optimized for pick-and-place and reflow processes without tombstoning risk |
| Low moisture sensitivity | MSL Level 1 per J-STD-020 - no bake requirement before PCB assembly |
Applications
| Industrial Sensor Signal Conditioning | Automotive ECU Reference Voltage |
|---|---|
Use Scenario: Stabilizing ADC reference voltage in 4–20 mA loop transmitters operating across −40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 33 V bias for op-amp gain-setting networks. Use Value: Maintains <±1% output accuracy over temperature due to tight 31.0–35.0 V tolerance and −2 mV/°C TC. |
Use Scenario: Clamping transient overvoltage on LIN bus interface lines in door module ECUs. IC Role / Device Role / Timing Role: Overvoltage protection element limiting line voltage to 35 V during load dump events. Use Value: Withstands 500 mW peak pulse power and meets AEC-Q101 stress requirements for automotive durability. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Bias |
Use Scenario: Providing isolated feedback voltage to optocoupler in 12 V/2 A wall adapter SMPS. IC Role / Device Role / Timing Role: Secondary-side zener reference setting output voltage via TL431 comparator input. Use Value: Enables ±3% output regulation with 325 Ω dynamic impedance minimizing feedback loop noise coupling. |
Use Scenario: Generating stable bias for photodiode amplifier stages in portable blood oximeters. IC Role / Device Role / Timing Role: Low-leakage (≤0.1 µA) voltage reference ensuring sub-nA input bias integrity. Use Value: Prevents signal offset drift in high-gain transimpedance amplifiers by eliminating reference current error. |
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 |
|---|---|---|---|
| MMBZ5265BLT1G | Zener voltage 33 V (31.35–34.65 V), 225 mW PD, SOT-23 package, RθJA = 357 °C/W | Lower power rating limits use in >100 mA clamp circuits; smaller footprint reduces thermal mass | Select when board space is constrained and power demand stays below 225 mW |
| BZX84-C33 | Zener voltage 33 V (31.4–34.6 V), 300 mW PD, SOT-23 package, non-AEC-Q101 rated | Lacks automotive qualification; higher leakage (≤1 µA @ 26.4 V) degrades high-impedance references | Acceptable for commercial-grade consumer products where AEC-Q101 and ultra-low leakage are not required |
Compared with MMBZ5265BLT1G and BZX84-C33, BZT52C33-7 offers superior thermal performance (500 mW vs. ≤300 mW), AEC-Q101 compliance for automotive deployment, and lowest reverse leakage (≤0.1 µA), making it optimal for high-reliability, thermally demanding, or precision-bias applications.
Availability
BZT52C33-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive ECU reference voltage generation, and medical diagnostic equipment bias requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT52C33-7 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 1960.
The BZT52C series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-volume voltage regulation and protection in space-constrained surface-mount designs.
FAQ
What is the maximum power dissipation for BZT52C33-7 at room temperature?
The BZT52C33-7 has a maximum power dissipation of 370 mW at ambient temperature TA = +25°C, derating linearly to 500 mW at lead temperature TL = +75°C per the DS18004 datasheet Figure 1 derating curve.
Does BZT52C33-7 have automotive qualification?
Yes - the BZT52C33-7 is qualified to AEC-Q101 standards for high-reliability automotive applications, confirmed in the Mechanical Data section of DS18004 Rev. 38-2, and supported by its "Q"-suffix variants (e.g., BZT52C33Q-7-F).
What is the reverse leakage current specification at 27.4 V?
At VR = 27.4 V and TA = +25°C, the maximum reverse leakage current for BZT52C33-7 is 0.1 µA, as specified in the Electrical Characteristics table under "Maximum Reverse Current (IR @ VR)" for Type Number BZT52C33.
Can BZT52C33-7 be used in place of BZT52C30-7 for higher voltage margin?
No - BZT52C33-7 (33 V) and BZT52C30-7 (30 V) have distinct zener voltage ranges (31.0–35.0 V vs. 28.0–32.0 V) and different test currents (2 mA vs. 2 mA), but substituting changes regulation setpoint by 3 V; circuit redesign is required to maintain proper bias or clamping thresholds.
BZT52C33-7 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
BZT52C33-7 FAQ
1.How can I place an order for BZT52C33-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C33-7 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 reliable?
The price and inventory of BZT52C33-7 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 is usually 5 days.
3.What payment methods are accepted for BZT52C33-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C33-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C33-7?
BZT52C33-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C33-7 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?
For technical support, including BZT52C33-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C33-7 requirements.
6.How does Aetrix verify that BZT52C33-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C33-7 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 meets industry standards.
7.What is the process for return or replacement of BZT52C33-7?
All BZT52C33-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C33-7, 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 part is unused and in its original packaging.
Return procedure for BZT52C33-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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