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Diodes Incorporated BZT52C3V3T-7
- Part No.:
- BZT52C3V3T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT52C3V3T-7.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:13,932
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Product details
Overview
BZT52C3V3T-7 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 3.3 V, ±6% tolerance (3.1–3.5 V), 5 mA test current, 95 Ω maximum zener impedance at 1 kHz, and 300 mW power dissipation in SOD523 package. It provides precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.
For engineers reviewing the BZT52C3V3T-7 datasheet, BZT52C3V3T-7 pinout, BZT52C3V3T-7 application, or BZT52C3V3T-7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (417 °C/W junction-to-ambient), reverse leakage (≤5.0 µA at 1.0 V), temperature coefficient (−3.5 to 0 mV/°C), and JEDEC-qualified reliability for industrial and automotive-adjacent designs.
Technical Context
This device operates as a two-terminal voltage reference and clamp, conducting in reverse breakdown when applied reverse voltage exceeds its specified zener voltage. Its flat-lead SOD523 package enables low-profile mounting and efficient heat transfer despite small size.
The diode exhibits a negative temperature coefficient between −3.5 and 0 mV/°C across its operating range (−55 to +150 °C), ensuring predictable drift behavior in temperature-sensitive biasing and reference circuits. It is rated for 300 mW power dissipation on FR-4 PCB with 2 oz copper and 1.92 mm² pad area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.1–3.5 V range at 5 mA - defines stable clamping threshold for 3.3 V rail protection |
| Power Dissipation (PD) | 300 mW - limits continuous energy handling without derating on standard PCB layout |
| Zener Impedance (ZZT) | ≤95 Ω at 1 kHz - ensures minimal voltage shift under dynamic load transients |
| Reverse Leakage (IR) | ≤5.0 µA at VR = 1.0 V - guarantees low standby current in always-on sensing or bias networks |
| Thermal Resistance (RθJA) | 417 °C/W - determines junction temperature rise under ambient conditions and guides thermal layout |
| Operating Temperature | −55 to +150 °C - supports extended-range industrial and under-hood automotive-adjacent use |
| Package | SOD523 - 1.25 mm × 0.85 mm footprint with cathode band marking, optimized for space-constrained PCBs |
Pinout & Package
Two-terminal device in SOD523 package: anode and cathode marked by molded cathode band on top surface. No internal pins; terminals are soldered directly to PCB pads per recommended layout (G = 0.80 mm, X = 0.60 mm, Y = 0.70 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node in shunt regulator | Connected to lower-potential side of circuit; forms return path during forward bias or zener clamp operation |
| Cathode | Zener breakdown terminal / Regulated output node | Connected to voltage rail being stabilized; conducts reverse current above VZ to clamp excess voltage |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD523 package | 1.25 mm × 0.85 mm footprint with 0.65 mm max height - enables routing under connectors or in ultra-thin modules |
| JEDEC-qualified high reliability | Qualified to AEC-Q standards per Diodes' high-reliability definitions - suitable for mission-critical industrial control nodes |
| Lead-free and halogen-free "Green" construction | Meets RoHS 3 (2015/863/EU) with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant for eco-sensitive consumer and medical products |
| Matte tin annealed terminals | Solderable per MIL-STD-202, Method 208 - ensures robust reflow joint integrity in automated assembly |
Applications
| USB Power Rail Protection | Microcontroller I/O Clamp |
|---|---|
Use Scenario: Protecting 3.3 V USB interface lines from ESD-induced overvoltage spikes during hot-plug events. IC Role / Device Role / Timing Role: Shunt clamping element that diverts transient current away from sensitive PHY transceivers. Use Value: Limits peak line voltage to ≤3.5 V with ≤5 µA leakage at 1.0 V, preserving signal integrity without loading idle bus states. | Use Scenario: Safeguarding GPIO pins of ARM Cortex-M microcontrollers against external voltage excursions beyond supply rail. IC Role / Device Role / Timing Role: Bidirectional voltage limiter placed between I/O pin and 3.3 V rail, conducting only during overvoltage. Use Value: Prevents latch-up and gate oxide damage with 95 Ω dynamic impedance, minimizing voltage overshoot during fast transients. |
| Low-Power Sensor Bias Reference | ADC Reference Stabilization |
Use Scenario: Providing stable 3.3 V bias for analog front-end op-amps in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Passive voltage reference source delivering regulated DC offset with minimal quiescent current. Use Value: Delivers ±6% voltage accuracy and −3.5 to 0 mV/°C TC across −40 to +85 °C, enabling sub-1% measurement repeatability. | Use Scenario: Stabilizing reference input of 12-bit SAR ADCs in portable instrumentation where supply ripple affects LSB accuracy. IC Role / Device Role / Timing Role: Low-impedance shunt regulator decoupling reference node from noisy system VDD. Use Value: 95 Ω zener impedance reduces AC coupling of supply noise into reference path, improving effective resolution by ≥0.5 bits. |
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 |
|---|---|---|---|
| MMBZ5226BS-7-F | Same 3.3 V nominal zener voltage, but SOT-323 package (larger footprint, 200 mW PD) and higher ZZT (150 Ω) | Less suitable for ultra-dense layouts; higher thermal resistance limits power handling in compact assemblies | Select when legacy SOT-323 board space exists and lower cost outweighs size/performance trade-offs |
| BZX84-C3V3 | 3.3 V zener in SOT-23 package (2.9 mm × 1.3 mm), 350 mW PD, but wider tolerance (±5%) and no JEDEC high-reliability qualification | Higher power margin but unqualified for automotive-adjacent stress screening; lacks green material certification | Prefer for non-critical commercial applications where thermal headroom >300 mW is required and RoHS 3 compliance is not mandated |
Compared with MMBZ5226BS-7-F and BZX84-C3V3, the BZT52C3V3T-7 offers superior space efficiency (SOD523), tighter thermal management (417 °C/W), JEDEC reliability validation, and full RoHS 3/halogen-free compliance-making it optimal for next-generation wearables, IoT edge nodes, and industrial controllers demanding miniaturization and long-term supply stability.
Availability
BZT52C3V3T-7 is available at Aetrix Electronics and suitable for USB power protection, microcontroller I/O clamping, low-power sensor biasing, and ADC reference stabilization requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZT52C3V3T-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BZT52 series belongs to Diodes' surface-mount Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in space-constrained, high-reliability applications including industrial automation, computing peripherals, and automotive-adjacent electronics.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZT52C3V3T-7 has a nominal zener voltage of 3.3 V with a guaranteed range of 3.1–3.5 V at 5 mA test current. It begins controlled reverse conduction within this range and is not rated for sustained operation above 3.5 V in regulation mode. Its absolute maximum reverse voltage rating is not separately specified, as breakdown is its intended operating region.
Does this part meet automotive qualification standards?
The BZT52C3V3T-7 is JEDEC-qualified for high reliability and manufactured in IATF 16949-certified facilities, but it is not AEC-Q200 qualified. For automotive applications, Diodes offers the Q-suffix variant (e.g., BZT52C3V3TQ-7-F), which undergoes additional stress testing and PPAP documentation per AEC-Q200 requirements.
Can this Zener diode be used in forward-bias applications?
Yes - the BZT52C3V3T-7 functions as a standard silicon diode in forward bias, with typical forward voltage of 0.9 V at 10 mA. However, its primary design purpose and characterization focus is reverse-breakdown regulation; forward conduction parameters are secondary and not optimized for rectification or switching roles.
How does the SOD523 package affect thermal performance compared to larger packages?
The SOD523 package delivers 417 °C/W junction-to-ambient thermal resistance on standard FR-4 with 2 oz copper and 1.92 mm² pad area - significantly higher than SOT-23 (≈250 °C/W) or SOT-323 (≈300 °C/W). This requires careful thermal pad design and limits continuous power to ≤300 mW unless enhanced copper pours or thermal vias are implemented.
BZT52C3V3T-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±6%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 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-523
BZT52C3V3T-7 FAQ
1.How can I place an order for BZT52C3V3T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C3V3T-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 BZT52C3V3T-7 reliable?
The price and inventory of BZT52C3V3T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C3V3T-7 is usually 5 days.
3.What payment methods are accepted for BZT52C3V3T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C3V3T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C3V3T-7?
BZT52C3V3T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C3V3T-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 BZT52C3V3T-7?
For technical support, including BZT52C3V3T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C3V3T-7 requirements.
6.How does Aetrix verify that BZT52C3V3T-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C3V3T-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 BZT52C3V3T-7 meets industry standards.
7.What is the process for return or replacement of BZT52C3V3T-7?
All BZT52C3V3T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C3V3T-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 BZT52C3V3T-7 part is unused and in its original packaging.
Return procedure for BZT52C3V3T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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