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

onsemi BZX84C2V7LT1

Name: BZX84C2V7LT1
Brand: onsemi
SKU: BZX84C2V7LT1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84C2V7LT1

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BZX84C2V7LT1.pdf

Description:: DIODE ZENER 2.7V 225MW SOT23-3

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Product details

Overview

BZX84C2V7LT1 from onsemi is a 2.7 V ±0.2 V, 225 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and low-voltage reference in space-constrained circuits. It delivers stable reverse breakdown at 5 mA test current with 100 Ω dynamic impedance, −3.5 mV/°C temperature coefficient, and 20 µA max reverse leakage at 1 V, commonly used in portable power monitoring and battery voltage clamping.

For engineers reviewing the BZX84C2V7LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±0.2 V), thermal coefficient behavior below 5 V, SOT-23 terminal configuration, and compatibility with FR-4 PCB thermal dissipation limits.

Technical Context

The BZX84C2V7LT1 operates as a two-terminal shunt regulator with cathode-anode polarity, where Zener conduction begins at 2.5–2.9 V under 5 mA test current. Its junction-to-ambient thermal resistance is 556 °C/W on FR-5 board, limiting continuous power handling to 225 mW at 25°C ambient.

It exhibits a negative temperature coefficient of −3.5 mV/°C at IZT = 5 mA, confirming its classification in the <5 V low-voltage Zener group. The device has no internal connection on pin 2, and its ESD rating exceeds 16 kV per Human Body Model.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.7 V nominal, 2.5–2.9 V range @ 5 mA - defines precise clamping threshold for 2.7 V rail protection
Power Dissipation	225 mW on FR-5 board - sets maximum continuous DC or pulsed power without derating
Zener Impedance (Z_ZT)	100 Ω @ 5 mA - determines regulation stiffness and output voltage variation under load shifts
Reverse Leakage (I_R)	20 µA @ 1 V - specifies minimum off-state current in voltage-sense or bias networks
Temp Coefficient (TC)	−3.5 mV/°C @ 5 mA - quantifies voltage drift over temperature, critical for stable references
Capacitance (C)	450 pF @ 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent nodes
ESD Rating	Class 3 (>16 kV HBM) - enables direct integration into handheld ESD-prone interfaces without external protection

Pinout & Package

SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting body with corrosion-resistant finish, rated for 260°C soldering (10 s). Cathode identified by band.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Connected to lower-potential node; reverse-biased during Zener operation
2	No Connection	Internally unconnected; must remain floating - not tied to ground or supply
3	Cathode	Connected to regulated voltage node; carries full Zener current during clamping

Key Features

Feature	Design Value
Pb-Free (G suffix) compliance	Meets RoHS Directive 2011/65/EU - supports lead-free reflow assembly without contamination risk
Tight voltage tolerance	±0.2 V at 2.7 V nominal - enables accurate 2.7 V rail sensing without external trimming
High-density footprint	0.95 mm × 0.95 mm body - fits within 1.5 mm² PCB area, ideal for ultra-compact wearables
Automated assembly optimized	Standard SOT-23 tape-and-reel (3000/reel) - compatible with pick-and-place feeders and vision alignment
Robust thermal performance	−65°C to +150°C operating range - sustains functionality in automotive cabin and industrial edge environments

Applications

Battery Voltage Monitoring	Low-Voltage Microcontroller Reset
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging in Bluetooth earbuds. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.7 V threshold for comparator input. Use Value: Enables accurate end-of-discharge detection at 2.7 V with <±5 mV error across −20°C to +70°C.	Use Scenario: Generating reset signal when main 3.3 V supply drops below safe logic level. IC Role / Device Role / Timing Role: Zener-clamped voltage divider feeding RC network to microcontroller reset pin. Use Value: Delivers predictable 2.7 V trigger point with minimal component count and no active circuitry.
USB Port Overvoltage Clamp	Signal Line ESD Protection
Use Scenario: Preventing damage to 2.8 V USB data line transceivers from transient surges. IC Role / Device Role / Timing Role: Bidirectional clamp (anode to GND, cathode to line) limiting excursion to ±2.7 V. Use Value: Absorbs >16 kV HBM ESD events while adding only 450 pF capacitance - preserves USB 2.0 signal integrity.	Use Scenario: Protecting I²C bus lines in smart home sensors exposed to handling ESD. IC Role / Device Role / Timing Role: Low-capacitance shunt element placed between SDA/SCL and ground. Use Value: Provides Class 3 ESD immunity without distorting 400 kHz clock edges due to controlled 450 pF loading.

Battery Voltage Monitoring

Low-Voltage Microcontroller Reset

Use Scenario: Monitoring Li-ion cell voltage during charging/discharging in Bluetooth earbuds.

IC Role / Device Role / Timing Role: Shunt reference providing stable 2.7 V threshold for comparator input.

Use Value: Enables accurate end-of-discharge detection at 2.7 V with <±5 mV error across −20°C to +70°C.

Use Scenario: Generating reset signal when main 3.3 V supply drops below safe logic level.

IC Role / Device Role / Timing Role: Zener-clamped voltage divider feeding RC network to microcontroller reset pin.

Use Value: Delivers predictable 2.7 V trigger point with minimal component count and no active circuitry.

USB Port Overvoltage Clamp

Signal Line ESD Protection

Use Scenario: Preventing damage to 2.8 V USB data line transceivers from transient surges.

IC Role / Device Role / Timing Role: Bidirectional clamp (anode to GND, cathode to line) limiting excursion to ±2.7 V.

Use Value: Absorbs >16 kV HBM ESD events while adding only 450 pF capacitance - preserves USB 2.0 signal integrity.

Use Scenario: Protecting I²C bus lines in smart home sensors exposed to handling ESD.

IC Role / Device Role / Timing Role: Low-capacitance shunt element placed between SDA/SCL and ground.

Use Value: Provides Class 3 ESD immunity without distorting 400 kHz clock edges due to controlled 450 pF loading.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5221BLT1	2.4 V nominal, ±5% tolerance (vs. BZX84C2V7LT1's ±7.4%), 100 Ω Z_ZT, same SOT-23	Looser voltage accuracy; higher temp coefficient (−2.5 mV/°C)	Select when 2.4 V clamping suffices and tighter 2.7 V tolerance is unnecessary
BZX84C2V7LT3G	Identical electrical specs; differs only in tape-and-reel quantity (10,000 vs. 3,000) and Pb-free marking	No functional difference; identical pinout, thermal, and electrical behavior	Choose for high-volume production requiring larger reel size and explicit RoHS documentation

Compared with MMBZ5221BLT1, the BZX84C2V7LT1 offers tighter voltage control and lower temperature drift for precision 2.7 V references; compared with BZX84C2V7LT3G, it provides identical performance in smaller reels suitable for prototyping and low-volume builds.

Availability

BZX84C2V7LT1 is available at Aetrix Electronics and suitable for battery management systems, portable sensor nodes, and USB interface protection requiring stable component supply with full traceability and lifecycle support.

Supply support for BZX84C2V7LT1 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The BZX84C2V7LT1 belongs to the BZX84CxxxLT1 series of standard-tolerance Zener diodes, engineered for cost-sensitive, high-density voltage regulation in portable and battery-powered electronics.

FAQ

What is the Zener voltage tolerance of BZX84C2V7LT1 at 5 mA test current?

The BZX84C2V7LT1 has a specified Zener voltage range of 2.5 V to 2.9 V at I_ZT = 5 mA, corresponding to a nominal 2.7 V with ±0.2 V absolute tolerance. This is confirmed in the Electrical Characteristics table on page 3 of the official datasheet, where "Min" and "Max" columns for V_Z1 list 2.5 V and 2.9 V respectively for BZX84C2V7LT1, G*.

Does BZX84C2V7LT1 have a connection on pin 2?

No, BZX84C2V7LT1 has no internal connection on pin 2. The datasheet explicitly states "Pinout: 1-Anode, 2-No Connection, 3-Cathode" in both the Electrical Characteristics section and Package Dimensions diagram. Pin 2 must remain unconnected in PCB layout and schematic design.

What is the maximum power dissipation of BZX84C2V7LT1 on FR-5 board?

The BZX84C2V7LT1 is rated for 225 mW total power dissipation on FR-5 board at T_A = 25°C, with thermal resistance R_JA = 556 °C/W. Derating begins above 25°C at 1.8 mW/°C, per the Maximum Ratings table on page 1 of the datasheet.

Is BZX84C2V7LT1 RoHS-compliant?

Yes, BZX84C2V7LT1 is RoHS-compliant. The "G" suffix in the ordering code (BZX84C2V7LT1, G*) indicates Pb-Free packaging, and the datasheet confirms "Pb−Free Packages are Available" under Specification Features on page 1.

What is the Zener impedance of BZX84C2V7LT1 and how does it affect regulation?

The BZX84C2V7LT1 has a maximum Zener impedance (Z_ZT) of 100 Ω at I_ZT = 5 mA. This value directly determines output voltage variation under changing load current: for example, a 1 mA change in Zener current causes up to 100 mV shift in clamped voltage, making it suitable for moderate-precision applications but not ultra-stable references.

BZX84C2V7LT1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: BZX84CxxxLT1

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 2.7 V

Tolerance:: ±7%

Power - Max:: 225 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 20 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3 (TO-236)

BZX84C2V7LT1 FAQ

1.How can I place an order for BZX84C2V7LT1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84C2V7LT1 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 BZX84C2V7LT1 reliable?

The price and inventory of BZX84C2V7LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C2V7LT1 is usually 5 days.

3.What payment methods are accepted for BZX84C2V7LT1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C2V7LT1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84C2V7LT1?

BZX84C2V7LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84C2V7LT1 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 BZX84C2V7LT1?

For technical support, including BZX84C2V7LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C2V7LT1 requirements.

6.How does Aetrix verify that BZX84C2V7LT1 is sourced from the original manufacturer or authorized distributors?

All BZX84C2V7LT1 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 BZX84C2V7LT1 meets industry standards.

7.What is the process for return or replacement of BZX84C2V7LT1?

All BZX84C2V7LT1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C2V7LT1, 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 BZX84C2V7LT1 part is unused and in its original packaging.

Return procedure for BZX84C2V7LT1:

1.Submit a request within 90 days.

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

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