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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Taiwan Semiconductor Corporation BZT52C3V3-G

Name: BZT52C3V3-G
Brand: Taiwan Semiconductor Corporation
SKU: BZT52C3V3-G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZT52C3V3-G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: BZT52C3V3-G.pdf

Description:: DIODE ZENER 3.3V 350MW SOD123

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Product details

Overview

BZT52C3V3-G from Taiwan Semiconductor is a 3.3 V, ±5% tolerance surface-mount Zener diode in SOD-123 package, rated for 350 mW power dissipation and operating across –55°C to +150°C junction temperature range; it provides precise voltage regulation in low-power biasing and reference circuits for consumer and industrial power management.

For engineers reviewing the BZT52C3V3-G datasheet, BZT52C3V3-G pinout, BZT52C3V3-G application, or BZT52C3V3-G equivalent, key selection criteria include nominal Zener voltage (3.3 V), test current (5 mA), dynamic impedance (95 Ω max at I_ZT), leakage current (5 µA max at 1.0 V), and thermal resistance (357 °C/W).

Technical Context

The BZT52C3V3-G operates as a single-die, cathode-banded Zener diode optimized for stable reverse-breakdown regulation under controlled test current (I_ZT = 5 mA). Its 3.3 V nominal Zener voltage falls within the 2.4–75 V family range, with specified Zener impedance (Z_ZT ≤ 95 Ω) and knee impedance (Z_ZK ≤ 600 Ω) confirming sharp breakdown characteristics suitable for precision reference use.

Designed for surface-mount assembly, it meets J-STD-020 moisture sensitivity level 1, JESD 201 Class 1A whisker resistance, and UL 94V-0 flammability requirements; its matte tin-plated terminals ensure reliable solderability per J-STD-002, and polarity is unambiguously marked by a cathode band.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.1–3.5 V (min–max at I_ZT = 5 mA); ensures ±5% regulation accuracy for 3.3 V rail referencing
Power Dissipation (P_D)	350 mW (at T_A = 25°C); defines maximum continuous steady-state power handling without derating
Zener Impedance (Z_ZT)	≤95 Ω (at I_ZT = 5 mA); indicates low AC impedance for stable regulation under small-signal variations
Leakage Current (I_R)	≤5 µA (at V_R = 1.0 V); confirms minimal reverse conduction below breakdown threshold
Junction Temperature Range	–55°C to +150°C; supports operation in extended-temperature industrial and automotive-adjacent environments
Forward Voltage (V_F)	0.9 V (at I_F = 10 mA); enables predictable forward conduction for dual-direction protection or clamping use cases

Pinout & Package

Package: SOD-123 - compact surface-mount plastic case with cathode band marking; dimensions comply with JEDEC standard outline; weight ≈ 10.55 mg.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / Zener knee reference node	Connected to lower-potential side in reverse-bias regulation; used for forward conduction when polarity reversed
Cathode	Reverse-bias voltage reference terminal / Zener breakdown output	Marked by band; connected to regulated voltage rail; defines polarity-sensitive mounting orientation on PCB

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables tight regulation without post-production trimming in cost-sensitive 3.3 V reference designs
SOD-123 package with level-1 moisture sensitivity	Supports standard reflow profiles without baking; reduces manufacturing overhead in high-volume SMT lines
150°C maximum junction temperature	Allows reliable operation in thermally constrained enclosures or near heat-generating components
RoHS-compliant and halogen-free construction	Meets global environmental compliance mandates (IEC 61249-2-21) for industrial and consumer end equipment

Applications

Low-Voltage Microcontroller Reference	USB Port Overvoltage Clamp
Use Scenario: Providing stable 3.3 V reference for ADC voltage dividers and internal bandgap calibration in battery-powered MCU systems. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference potential relative to ground. Use Value: Delivers ±5% voltage accuracy at 5 mA test current with <95 Ω dynamic impedance, minimizing reference drift under load variation.	Use Scenario: Clamping transient overvoltage on USB D+ line during ESD events or hot-plug surges. IC Role / Device Role / Timing Role: Bidirectional protection device leveraging forward conduction (0.9 V @ 10 mA) and reverse Zener action (3.3 V @ 5 mA). Use Value: Limits line voltage to safe levels before transceiver input while maintaining signal integrity via low leakage (≤5 µA @ 1 V).
Industrial Sensor Bias Supply	LED Driver Current Set Point
Use Scenario: Generating stable bias voltage for analog sensor front-ends in factory automation modules exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed bias point for op-amp input stages. Use Value: Maintains regulation across –55°C to +150°C with predictable temperature coefficient (–3.5 mV/°C), reducing calibration burden.	Use Scenario: Setting constant current for low-current indicator LEDs in HMI panels using resistor-Zener current source topology. IC Role / Device Role / Timing Role: Voltage reference defining emitter-base drop across series transistor in simple current mirror configuration. Use Value: Enables accurate 3.3 V reference with ≤5 µA leakage, minimizing error contribution to set-point accuracy in milliamp-range LED drive.

Low-Voltage Microcontroller Reference

USB Port Overvoltage Clamp

Use Scenario: Providing stable 3.3 V reference for ADC voltage dividers and internal bandgap calibration in battery-powered MCU systems.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference potential relative to ground.

Use Value: Delivers ±5% voltage accuracy at 5 mA test current with <95 Ω dynamic impedance, minimizing reference drift under load variation.

Use Scenario: Clamping transient overvoltage on USB D+ line during ESD events or hot-plug surges.

IC Role / Device Role / Timing Role: Bidirectional protection device leveraging forward conduction (0.9 V @ 10 mA) and reverse Zener action (3.3 V @ 5 mA).

Use Value: Limits line voltage to safe levels before transceiver input while maintaining signal integrity via low leakage (≤5 µA @ 1 V).

Industrial Sensor Bias Supply

LED Driver Current Set Point

Use Scenario: Generating stable bias voltage for analog sensor front-ends in factory automation modules exposed to wide ambient temperatures.

IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed bias point for op-amp input stages.

Use Value: Maintains regulation across –55°C to +150°C with predictable temperature coefficient (–3.5 mV/°C), reducing calibration burden.

Use Scenario: Setting constant current for low-current indicator LEDs in HMI panels using resistor-Zener current source topology.

IC Role / Device Role / Timing Role: Voltage reference defining emitter-base drop across series transistor in simple current mirror configuration.

Use Value: Enables accurate 3.3 V reference with ≤5 µA leakage, minimizing error contribution to set-point accuracy in milliamp-range LED drive.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5226BS-7-F	Zener voltage 3.3 V (±5%), same SOD-123 package, but higher Z_ZT (150 Ω max @ 20 mA)	Higher test current shifts operating point; less suitable for low-current references	Prefer BZT52C3V3-G where 5 mA test current and 95 Ω Z_ZT are critical
1N4728A	Through-hole DO-41 package, 3.3 V ±5%, P_D = 1 W, Z_ZT = 10 Ω @ 76 mA	Not surface-mountable; requires board real estate and wave-solder process	Select BZT52C3V3-G for SMT compatibility and space-constrained PCBs

Compared with MMBZ5226BS-7-F and 1N4728A, the BZT52C3V3-G offers optimal balance of SMT compatibility, low-current regulation fidelity (5 mA I_ZT, 95 Ω Z_ZT), and industrial temperature support - making it preferred for modern embedded reference and clamp designs where footprint and thermal robustness matter.

Availability

BZT52C3V3-G is available at Aetrix Electronics and suitable for low-power voltage reference, ESD clamping, and sensor biasing applications requiring stable component supply and consistent parametric performance across production batches.

Supply support for BZT52C3V3-G 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, analog ICs, and protection components for industrial, computing, and consumer markets.

The BZT52C series is part of TSC's general-purpose Zener diode portfolio designed specifically for cost-effective, high-reliability voltage regulation and transient suppression in surface-mount power management circuits.

FAQ

What is the nominal Zener voltage and tolerance of the BZT52C3V3-G?

The BZT52C3V3-G has a nominal Zener voltage of 3.3 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 3.1 V and 3.5 V when tested at 5 mA (I_ZT). This specification is confirmed in the Electrical Specifications table of the official Taiwan Semiconductor datasheet (Version C2007), and applies strictly under standard conditions (T_A = 25°C).

What package type and mounting style does the BZT52C3V3-G use?

The BZT52C3V3-G uses the SOD-123 surface-mount package, featuring matte tin-plated leads compliant with J-STD-002 solderability standards and moisture sensitivity level 1 per J-STD-020. Its cathode is marked by a visible band, and it weighs approximately 10.55 mg - enabling automated pick-and-place assembly without pre-baking.

What is the maximum power dissipation rating for the BZT52C3V3-G?

The BZT52C3V3-G is rated for a maximum power dissipation of 350 mW at ambient temperature (T_A = 25°C). Its thermal resistance from junction-to-ambient is 357 °C/W, so power must be derated linearly above 25°C per the published Power Derating Curve - reaching zero dissipation at ~110°C ambient.

How does the BZT52C3V3-G perform in terms of leakage current and dynamic impedance?

The BZT52C3V3-G exhibits ≤5 µA leakage current at 1.0 V reverse bias and a dynamic impedance of ≤95 Ω measured at 5 mA Zener test current (I_ZT). These values ensure minimal off-state conduction and stable regulation under small-signal AC variations - critical for precision reference and low-noise biasing applications.

Is the BZT52C3V3-G RoHS-compliant and halogen-free?

Yes, the BZT52C3V3-G is RoHS-compliant and halogen-free in accordance with IEC 61249-2-21. Taiwan Semiconductor confirms this in the FEATURES section of the datasheet (Version C2007), and the molding compound meets UL 94V-0 flammability rating - satisfying environmental and safety requirements for commercial and industrial end equipment.

BZT52C3V3-G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 3.3 V

Tolerance:: ±5%

Power - Max:: 350 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:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

BZT52C3V3-G FAQ

1.How can I place an order for BZT52C3V3-G through Aetrix?

Please submit a Request for Quotation (RFQ) for BZT52C3V3-G 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-G reliable?

The price and inventory of BZT52C3V3-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C3V3-G is usually 5 days.

3.What payment methods are accepted for BZT52C3V3-G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C3V3-G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZT52C3V3-G?

BZT52C3V3-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZT52C3V3-G 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-G?

For technical support, including BZT52C3V3-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C3V3-G requirements.

6.How does Aetrix verify that BZT52C3V3-G is sourced from the original manufacturer or authorized distributors?

All BZT52C3V3-G 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-G meets industry standards.

7.What is the process for return or replacement of BZT52C3V3-G?

All BZT52C3V3-G units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C3V3-G, 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-G part is unused and in its original packaging.

Return procedure for BZT52C3V3-G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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