Diodes Incorporated BZX84C2V7T-7-F

Overview

BZX84C2V7T-7-F from Diodes Incorporated is a 2.7 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 5 mA test current with ±0.2 V tolerance (2.5–2.9 V), 100 Ω dynamic impedance at 5 mA, and -3.5 to 0 mV/°C temperature coefficient. It provides precision voltage reference and overvoltage clamping in low-power analog sensor interfaces.

For engineers reviewing the BZX84C2V7T-7-F datasheet, BZX84C2V7T-7-F pinout, BZX84C2V7T-7-F application, or BZX84C2V7T-7-F equivalent, key selection criteria include zener voltage tolerance at 5 mA, thermal resistance (833 °C/W), reverse leakage at 1.0 V (20 µA), SOT-523 footprint compatibility, and RoHS-compliant matte tin plating.

Technical Context

This Zener diode uses planar die construction for stable breakdown characteristics and low noise performance. Its 2.7 V nominal zener voltage is specified at I_ZT = 5 mA with tight 2.5–2.9 V min/max range and low 100 Ω zener impedance (Z_ZT) at that current.

Thermal design is constrained by R_θJA = 833 °C/W on FR-4 board with recommended pad layout, limiting continuous power dissipation to 150 mW at T_A = 25 °C and requiring derating above 25 °C per Fig. 1. Operating junction temperature spans -65 to +150 °C.

Key Specifications

Pinout & Package

Package: SOT-523 - ultra-small plastic surface-mount case (1.60 mm × 0.80 mm × 0.50 mm), UL 94V-0 rated, moisture sensitivity level 1, lead-free matte tin plating over Alloy 42 leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5223BS-7-F and BZX84-C2V7,115, the BZX84C2V7T-7-F offers the smallest footprint and lowest thermal resistance per unit area, making it optimal for space-constrained, low-power reference designs where board real estate is premium.

Availability

BZX84C2V7T-7-F is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB port overvoltage protection, and low-power battery monitor reference applications requiring stable component supply and long-term lifecycle support.

Supply support for BZX84C2V7T-7-F 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 and manufacturing operations across Asia and the Americas.

The BZX84 series belongs to Diodes' general-purpose Zener diode product line, engineered specifically for compact, cost-effective voltage regulation and protection in consumer, computing, and industrial electronics.

FAQ

What is the maximum reverse voltage this Zener can withstand before breakdown?

The BZX84C2V7T-7-F has a nominal zener voltage of 2.7 V, with guaranteed breakdown occurring between 2.5 V and 2.9 V at 5 mA test current. It is not rated for sustained reverse voltage above its specified zener range; operation beyond 2.9 V risks uncontrolled conduction or thermal damage if power limits are exceeded.

Can this device be used in series to achieve higher reference voltages?

Yes, multiple BZX84C2V7T-7-F diodes may be stacked anode-to-cathode in series to sum zener voltages, but total power dissipation must remain within 150 mW per device and thermal coupling must be managed. Series combinations increase overall impedance and temperature coefficient uncertainty, so precision applications should verify combined drift.

Is the SOT-523 package compatible with standard reflow soldering profiles?

Yes - the SOT-523 package uses lead-free matte tin plating and is qualified for standard Pb-free reflow profiles (J-STD-020D Level 1). Its low mass allows rapid heating, but thermal pad layout per Diodes' AP02001 must be followed to ensure adequate heat dissipation and avoid tombstoning.

How does the -3.5 to 0 mV/°C temperature coefficient affect circuit accuracy?

This negative temperature coefficient means the zener voltage decreases slightly as temperature rises - e.g., ~0.5 mV drop per 10 °C rise near room temperature. For a 2.7 V reference over -20 to +70 °C, total drift is approximately ±15 mV, which must be budgeted in precision analog designs or compensated via circuit topology.