My Inquiry
My Account
Diodes Incorporated BZT52C3V3-7
- Part No.:
- BZT52C3V3-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C3V3-7.pdf
- Description:
- DIODE ZENER 3.3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT52C3V3-7 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 3.3 V, ±5% tolerance (3.1–3.5 V), 500 mW power dissipation at TL = +75°C, and 370 mW at TA = +25°C, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZT52C3V3-7 datasheet, BZT52C3V3-7 pinout, BZT52C3V3-7 application, or BZT52C3V3-7 equivalent, key selection criteria include zener voltage accuracy at 5 mA test current, low dynamic impedance (95 Ω @ 5 mA), temperature coefficient (−3.5 mV/°C), reverse leakage (5.0 µA @ 1.0 V), and SOD123 package compatibility with automated assembly.
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 long-term stability across industrial temperature range (−65°C to +150°C).
Designed for medium-current general-purpose regulation, it delivers predictable performance with 1.0 mA knee current (IZK), 5.0 mA nominal test current (IZT), and thermal resistance of 150°C/W junction-to-lead - enabling reliable operation on FR-4 PCBs with standard copper pad layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.1–3.5 V range @ 5 mA - defines precise clamping threshold for 3.3 V rail protection |
| Power Dissipation | 370 mW @ TA = +25°C - sets maximum continuous power in ambient air without heatsinking |
| Zener Impedance (ZZT) | 95 Ω @ 5 mA - determines output voltage variation under load changes |
| Reverse Leakage (IR) | 5.0 µA @ VR = 1.0 V - ensures minimal quiescent current in standby regulation |
| Temperature Coefficient | −3.5 mV/°C - quantifies voltage drift per degree Celsius near room temperature |
| Thermal Resistance (RθJL) | 150 °C/W - indicates junction-to-lead heat transfer efficiency for PCB-level thermal design |
| Package | SOD123 - compact 2-pin surface-mount outline compatible with pick-and-place and reflow processes |
Pinout & Package
Package: SOD123 - molded plastic case with matte tin-plated alloy 42 leadframe, cathode band marking, UL 94V-0 flammability rating, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower potential node during regulation |
| Cathode | Reverse-biased breakdown terminal / regulated output node | Connected to voltage rail being clamped; polarity marked by band |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight parameter distribution and improved long-term reliability vs. diffused junctions |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling and HTRB stress |
| Lead-free & RoHS-compliant | Fully compliant with EU Directive 2011/65/EU; no intentionally added lead or halogens |
| Automated assembly compatibility | SOD123 footprint optimized for high-speed placement and standard reflow profiles |
| Low weight (0.010 g) | Minimizes mechanical stress on PCB interconnects in vibration-prone environments |
Applications
| USB Power Interface Protection | Microcontroller I/O Clamp Circuit |
|---|---|
Use Scenario: Clamping 3.3 V USB VBUS line against ESD transients and overvoltage events. IC Role / Device Role / Timing Role: Zener clamp placed between VBUS and GND to shunt excess energy before IC input stages. Use Value: 3.3 V breakdown threshold aligns precisely with USB 3.3 V logic rail; 5.0 µA leakage avoids loading during normal operation. |
Use Scenario: Protecting GPIO pins of ARM Cortex-M microcontrollers from voltage excursions beyond supply rails. IC Role / Device Role / Timing Role: Bidirectional ESD protection element connected between I/O and 3.3 V rail or ground. Use Value: Low 95 Ω dynamic impedance ensures fast response to transient spikes while maintaining signal integrity. |
| Industrial Sensor Reference Stabilization | Low-Power Battery Monitor Threshold |
Use Scenario: Providing stable 3.3 V reference for analog front-end amplifiers in temperature/humidity sensors. IC Role / Device Role / Timing Role: Shunt regulator supplying bias voltage to op-amp input stages and ADC references. Use Value: −3.5 mV/°C tempco enables predictable compensation in wide-temperature industrial enclosures (−40°C to +85°C). |
Use Scenario: Detecting lithium-ion battery undervoltage (e.g., 3.3 V cutoff) in portable medical devices. IC Role / Device Role / Timing Role: Threshold detector feeding comparator input to trigger low-battery warning or shutdown. Use Value: Tight 3.1–3.5 V tolerance ensures accurate trip point without external trimming resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | Zener voltage 3.3 V, but rated at 200 mW (SOT-23); higher ZZT (150 Ω @ 20 mA) | Limited power handling; suitable only for sub-10 mA regulation loads | Select when board space is constrained and thermal budget allows lower dissipation |
| 1N4728A | Through-hole DO-41 package; 1 W power rating; looser ±5% tolerance; higher RθJA (500°C/W) | Requires manual soldering; better for prototyping or high-power legacy designs | Select for through-hole assembly or where higher surge capability is required |
Compared with MMBZ5226BS-7-F and 1N4728A, BZT52C3V3-7 offers optimal balance of SMD manufacturability, 370 mW ambient-rated power, and tight 3.1–3.5 V regulation window - making it preferred for volume production of 3.3 V rail protection in space-constrained industrial PCBs.
Availability
BZT52C3V3-7 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller I/O clamping, and industrial sensor reference stabilization requiring stable component supply and AEC-Q101 reliability assurance.
Supply support for BZT52C3V3-7 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 consumer markets.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-yield voltage regulation and transient suppression in automated SMT production environments.
FAQ
What is the maximum reverse voltage (VR) that BZT52C3V3-7 can withstand before breakdown?
The device exhibits controlled reverse breakdown at its nominal zener voltage of 3.3 V when tested at 5 mA. Below this threshold, reverse leakage remains ≤5.0 µA at 1.0 V. It is not rated for sustained operation above 3.5 V - exceeding this risks irreversible degradation due to thermal runaway under unregulated current conditions.
Can BZT52C3V3-7 be used in place of a 3.3 V LDO regulator?
No - it functions only as a shunt regulator and requires a series current-limiting resistor to operate safely. Unlike an LDO, it cannot source load current or maintain regulation under variable load without external impedance control. It is appropriate for voltage reference or overvoltage clamping, not active rail regulation.
Is the SOD123 package of BZT52C3V3-7 compatible with IPC-7351B standard footprints?
Yes - the SOD123 outline matches IPC-7351B "SOD123" land pattern (density level A), with recommended pad dimensions of 0.90 mm × 0.95 mm and 4.05 mm center-to-center spacing. Diodes Incorporated's published SOD123 pad layout confirms alignment with this standard for reliable reflow yield.
Does BZT52C3V3-7 meet automotive qualification requirements?
The -7 suffix denotes commercial grade; however, the underlying BZT52C3V3 die is AEC-Q101 qualified. For automotive use, specify the Q-qualified variant (e.g., BZT52C3V3Q-7-F), which undergoes additional stress testing including HTOL, temperature cycling, and ESD per AEC standards.
BZT52C3V3-7 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):
- 3.3 V
- Tolerance:
- ±6%
- Power - Max:
- 500 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-123
BZT52C3V3-7 FAQ
1.How can I place an order for BZT52C3V3-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C3V3-7 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 BZT52C3V3-7 reliable?
The price and inventory of BZT52C3V3-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C3V3-7 is usually 5 days.
3.What payment methods are accepted for BZT52C3V3-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C3V3-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C3V3-7?
BZT52C3V3-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C3V3-7 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 BZT52C3V3-7?
For technical support, including BZT52C3V3-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C3V3-7 requirements.
6.How does Aetrix verify that BZT52C3V3-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C3V3-7 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 BZT52C3V3-7 meets industry standards.
7.What is the process for return or replacement of BZT52C3V3-7?
All BZT52C3V3-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C3V3-7, 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 BZT52C3V3-7 part is unused and in its original packaging.
Return procedure for BZT52C3V3-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52C3V3-7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
