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

Nexperia USA Inc. BZX84W-B2V7X

Name: BZX84W-B2V7X
Brand: Nexperia USA Inc.
SKU: BZX84W-B2V7X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84W-B2V7X

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-70, SOT-323

Datasheet:: BZX84W-B2V7X.pdf

Description:: DIODE ZENER 2.7V 275MW SOT323

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Product details

Overview

BZX84W-B2V7X from Nexperia is a ±2% tolerance Zener diode in SOT323 (SC-70) package, rated for 2.7 V nominal regulation voltage at 5 mA, with 275 mW total power dissipation and 200 mA maximum forward current. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback paths, and overvoltage protection nodes.

For engineers reviewing the BZX84W-B2V7X datasheet, BZX84W-B2V7X pinout, BZX84W-B2V7X application, or BZX84W-B2V7X equivalent, this page delivers verified electrical parameters, thermal behavior, SOT323 terminal mapping, and real-world use cases for stable low-voltage regulation in space-constrained designs.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable 2.7 V reference across load variations, with differential resistance of 600 Ω at I_Z = 1 mA and 100 Ω at I_Z = 5 mA. Its negative temperature coefficient of −2.0 mV/K ensures predictable drift under thermal stress.

Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it delivers 455 K/W junction-to-ambient thermal resistance and supports non-repetitive surge pulses up to 40 W (100 µs, 25 °C ambient).

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	2.7 V at I_Z = 5 mA - defines regulation setpoint for feedback or clamping circuits
Tolerance	±2% - enables tight voltage margin control in precision references
Power Dissipation	275 mW at T_amb = 25 °C - sets maximum continuous DC power handling on standard FR4
Forward Voltage	0.9 V at I_F = 10 mA - determines forward conduction loss in series protection configurations
Reverse Current	20 µA at V_R = 1 V - specifies leakage level below breakdown, critical for low-power standby operation
Junction Temperature	150 °C max - defines upper thermal limit for reliable long-term operation
Package	SOT323 (SC-70) - 1.3 mm × 2.2 mm footprint enabling high-density PCB layouts

Pinout & Package

SOT323 (SC-70) is a leadless, surface-mount plastic package with three terminals in a compact 1.3 mm × 2.2 mm outline and 0.65 mm pitch. Thermal performance assumes mounting on FR4 with single-sided copper and standard tin-plated footprint per Figure 9.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node in Zener regulation configuration
2	Not Connected (n.c.)	Internal die pad with no electrical connection; must remain unconnected in layout
3	Cathode (K)	Reverse-biased terminal; connects to higher-potential node and carries regulated current

Key Features

Feature	Design Value
Low-leakage regulation	20 µA reverse current at 1 V - minimizes quiescent drain in battery-powered voltage monitors
Precision voltage stability	±2% tolerance and −2.0 mV/K tempco - supports stable reference generation across industrial temperature range
High surge resilience	40 W non-repetitive peak reverse power (100 µs) - withstands transient overvoltage events without degradation
Miniature SMT footprint	SOT323 package (1.3 × 2.2 mm) - enables placement in tight spaces such as portable sensor modules and wearables

Applications

Power Supply Feedback

Overvoltage Clamp

Use Scenario: Regulating output voltage in low-current linear regulators or switching converter feedback loops.

IC Role / Device Role / Timing Role: Shunt reference element providing stable 2.7 V reference to error amplifier input.

Use Value: Enables accurate output setpoint control within ±2% tolerance, reducing need for post-production trimming.

Use Scenario: Protecting microcontroller I/O pins from ESD or supply rail transients.

IC Role / Device Role / Timing Role: Fast-acting clamp that conducts above 2.7 V to divert excess energy to ground.

Use Value: Limits voltage excursion to ≤2.7 V + forward drop, preventing latch-up or gate oxide damage in 3.3 V logic interfaces.

Low-Power Reference

Signal Level Translation

Use Scenario: Generating a stable bias point for op-amp comparators or ADC reference dividers in IoT sensors.

IC Role / Device Role / Timing Role: Passive voltage source delivering 2.7 V with minimal current draw (<100 µA standby).

Use Value: Achieves <1% regulation error at 10 µA load, extending battery life in always-on sensing nodes.

Use Scenario: Shifting logic levels between 3.3 V and 2.7 V domains in mixed-voltage systems.

IC Role / Device Role / Timing Role: Forward-biased diode drop (0.9 V) used in series with signal path to offset voltage.

Use Value: Provides deterministic 0.9 V drop at 10 mA, enabling clean level shift without active circuitry or timing skew.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84W-C2V7	±5% tolerance (vs. ±2%), identical package and thermal specs	Acceptable where tighter regulation not required; lower cost	Select when budget constraints outweigh precision needs and system tolerances allow ±5% variation
MMSZ4678T1G	2.7 V nominal, ±5%, SOD-123 package (larger footprint, 2.7 × 1.6 mm), 500 mW P_tot	Better power handling but occupies 2.5× more board area	Choose only if >275 mW continuous dissipation is needed and SOT323 size is not critical

Compared with BZX84W-B2V7X, BZX84W-C2V7 trades regulation accuracy for cost, while MMSZ4678T1G sacrifices miniaturization for higher power capacity-neither offers both the ±2% tolerance and SOT323 footprint simultaneously.

Availability

BZX84W-B2V7X is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and low-power reference applications requiring stable component supply, consistent parametric performance, and RoHS-compliant SMT packaging.

Supply support for BZX84W-B2V7X 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality systems.

The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for stable voltage regulation in space-constrained, cost-sensitive applications where precision, low leakage, and robust surge immunity are essential.

FAQ

What is the maximum continuous reverse current the BZX84W-B2V7X can regulate at 25 °C?

At 25 °C ambient, the device regulates continuously up to 102 mA, calculated from P_tot = 275 mW and V_Z = 2.7 V (I_Z = P_tot/V_Z). Derating applies above 25 °C per the 455 K/W thermal resistance; at 85 °C ambient, maximum usable I_Z drops to ~65 mA to maintain T_j ≤ 150 °C.

How does the −2.0 mV/K temperature coefficient affect regulation accuracy over −40 °C to +125 °C?

Over −40 °C to +125 °C, the Zener voltage shifts by −2.0 mV per Kelvin, resulting in a total drift of −330 mV (165 K × −2.0 mV/K). At 2.7 V nominal, this represents a −12.2% change. System-level compensation or selection of higher-V_Z types with positive tempcos may be needed for wide-temperature stability.

Can the n.c. pin (Pin 2) be grounded or left floating in PCB layout?

Pin 2 is internally not connected and must remain unconnected in layout-neither grounded nor tied to any net. Connecting it risks mechanical stress on the die bond or unintended parasitic coupling. The SOT323 footprint in Figure 9 explicitly excludes solder paste on Pin 2, confirming its isolation requirement.

Is BZX84W-B2V7X suitable for automotive applications?

No. Per Nexperia's revision history (Table 10), the BZX84W series was changed to non-automotive qualification in Rev. 2 (2023). It lacks AEC-Q101 qualification, automotive-grade screening, and guaranteed operation across −40 °C to +150 °C junction range. Automotive alternatives are designated with "-Q" suffixes and documented separately on nexperia.com.

BZX84W-B2V7X Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX84W

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

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

Tolerance:: ±2%

Power - Max:: 275 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:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

BZX84W-B2V7X FAQ

1.How can I place an order for BZX84W-B2V7X through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84W-B2V7X 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 BZX84W-B2V7X reliable?

The price and inventory of BZX84W-B2V7X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B2V7X is usually 5 days.

3.What payment methods are accepted for BZX84W-B2V7X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B2V7X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84W-B2V7X?

BZX84W-B2V7X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84W-B2V7X 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 BZX84W-B2V7X?

For technical support, including BZX84W-B2V7X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B2V7X requirements.

6.How does Aetrix verify that BZX84W-B2V7X is sourced from the original manufacturer or authorized distributors?

All BZX84W-B2V7X 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 BZX84W-B2V7X meets industry standards.

7.What is the process for return or replacement of BZX84W-B2V7X?

All BZX84W-B2V7X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B2V7X, 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 BZX84W-B2V7X part is unused and in its original packaging.

Return procedure for BZX84W-B2V7X:

1.Submit a request within 90 days.

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

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