Diodes Incorporated BZX84C3V0T-7-F

Overview

BZX84C3V0T-7-F from Diodes Incorporated is a 3.0 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 5 mA test current with 2.8–3.2 V zener voltage tolerance, 95 Ω dynamic impedance at I_ZT, and -3.5 to 0 mV/°C temperature coefficient - used for precision voltage reference and overvoltage clamping in low-power sensor signal conditioning circuits.

For engineers reviewing the BZX84C3V0T-7-F datasheet, BZX84C3V0T-7-F pinout, BZX84C3V0T-7-F application, or BZX84C3V0T-7-F equivalent, key selection criteria include zener voltage accuracy at 5 mA, thermal resistance (833 °C/W), reverse leakage (<20 µA at 1.0 V), SOT-523 footprint compatibility, and RoHS-compliant matte tin plating.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled nominal voltage of 3.0 V at I_ZT = 5 mA, exhibiting low dynamic impedance (95 Ω) and minimal temperature drift (-3.5 to 0 mV/°C). Its planar die construction ensures stable parametric performance across temperature and lifetime.

The device is optimized for low-current regulation and transient voltage suppression in space-constrained PCB layouts. It delivers specified electrical behavior only when mounted on FR-4 with Diodes Inc.'s recommended pad layout and derated above 25 °C per the 150 mW → 0 mW linear power derating curve.

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-plated terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5226BS-7-F and BZX84-C3V0,115, the BZX84C3V0T-7-F offers optimal balance of ultra-compact SOT-523 size, full RoHS compliance, and verified 95 Ω impedance - critical for miniaturized, certified industrial and medical designs where board space and regulatory alignment are non-negotiable.

Availability

BZX84C3V0T-7-F is available at Aetrix Electronics and suitable for temperature-sensing modules, USB-C interface protection, low-power MCU reset circuits, and 4–20 mA loop transmitter references requiring stable component supply across production lifecycles.

Supply support for BZX84C3V0T-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, serving automotive, industrial, computing, and consumer markets with high-reliability components.

The BZX84 series belongs to Diodes Inc.'s precision Zener diode product line, engineered specifically for space-constrained voltage reference and clamping applications demanding tight V_Z tolerance, low Z_ZT, and consistent thermal behavior.

FAQ

What is the maximum reverse voltage this Zener can safely clamp without degradation?

The BZX84C3V0T-7-F is rated for continuous reverse operation at its nominal 3.0 V zener voltage with 5 mA test current. It withstands short-duration pulses up to its absolute maximum rating of 150 mW, but sustained reverse voltage beyond 3.2 V (max V_Z) risks thermal runaway unless externally current-limited to ≤5 mA. Derating begins linearly above 25 °C ambient.

Does this part meet JEDEC moisture sensitivity level requirements for reflow soldering?

Yes - the BZX84C3V0T-7-F is rated Moisture Sensitivity Level 1 per J-STD-020D, meaning it may be stored indefinitely at ≤30 °C/60% RH and subjected to standard Pb-free reflow profiles (peak 260 °C) without baking or special handling. This is confirmed by Diodes Inc.'s qualification testing and documented in DS30262 Rev. 10.

How does the -3.5 to 0 mV/°C temperature coefficient affect accuracy in a 0–70 °C operating range?

Over 0–70 °C, the worst-case V_Z drift is (70 °C × |−3.5| mV/°C) = 245 mV, or ~8.2% of 3.0 V. However, typical units center near −1.5 mV/°C, yielding ~105 mV drift (~3.5%). For high-accuracy uses, pairing with a complementary TC component or calibration is recommended.

Can this Zener replace a 3.3 V variant in a circuit originally designed for BZX84C3V3T-7-F?

No - substituting BZX84C3V0T-7-F for BZX84C3V3T-7-F introduces a 0.3 V lower clamping voltage, which may cause premature activation in overvoltage protection or incorrect biasing in reference circuits. The 3.0 V vs. 3.3 V difference exceeds typical design margins; verification of downstream IC input thresholds and power rail tolerances is mandatory before substitution.