Diodes Incorporated BZT52C2V4SQ-7-F

Overview

BZT52C2V4SQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 2.4 V zener voltage (±0.2 V tolerance), 200 mW power dissipation, and SOD323 package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits for automotive and industrial control modules.

For engineers reviewing the BZT52C2V4SQ-7-F datasheet, BZT52C2V4SQ-7-F pinout, BZT52C2V4SQ-7-F application, or BZT52C2V4SQ-7-F equivalent, key selection criteria include zener voltage accuracy at 5 mA test current, low dynamic impedance (≤100 Ω), temperature coefficient (−3.5 to 0 mV/°C), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD323 package supports high-density PCB layouts and automated assembly.

The device exhibits a maximum zener impedance of 100 Ω at 5 mA and 600 Ω at 1 mA, enabling effective regulation in low-current applications such as sensor biasing and microcontroller reset circuitry. Reverse leakage remains ≤50 µA at 1.0 V, supporting low-power standby operation.

Key Specifications

Pinout & Package

SOD323 is a two-terminal surface-mount package with cathode identified by a band on the top surface. The device has no polarity-sensitive internal structure beyond the PN junction; terminal assignment is strictly anode/cathode based on physical marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5221BS-7-F and BZX384-B2V4,115, the BZT52C2V4SQ-7-F offers optimal balance of AEC-Q101 qualification, low-cost manufacturability, and sufficient regulation performance for mainstream automotive and industrial applications-without over-specifying for cost-sensitive designs.

Availability

BZT52C2V4SQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and consumer IoT power management requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZT52C2V4SQ-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, manufacturing, and sales operations across Asia, Europe, and North America.

The BZT52C series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage regulation and protection in harsh-environment electronic control units where reliability, consistency, and regulatory compliance are non-negotiable.

FAQ

What is the maximum reverse voltage (V_R) that BZT52C2V4SQ-7-F can withstand before breakdown?

The device is rated for a nominal zener voltage of 2.4 V at 5 mA test current, with guaranteed breakdown occurring between 2.20 V and 2.60 V. It does not specify a separate "maximum reverse voltage" rating; operation above 2.60 V at I_Z > 5 mA will exceed its 200 mW power limit unless current is externally limited.

Is BZT52C2V4SQ-7-F suitable for use in high-humidity environments?

Yes - it meets J-STD-020 Moisture Sensitivity Level 1, meaning it can be stored indefinitely at ≤30°C/60% RH without baking. Its molded plastic case carries UL 94V-0 flammability rating and hermetically sealed leadframe plating ensures robust performance in humid industrial enclosures.

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

With α_VZ ranging from −3.5 to 0 mV/°C, the zener voltage may decrease by up to 0.58 V across this range. For example, at +125°C, V_Z could shift from 2.40 V to ~1.82 V - requiring system-level compensation or selection of higher-V_Z variants for wide-temperature stability.

Can BZT52C2V4SQ-7-F replace older BZT52C2V4S-7-F parts in existing designs?

Yes - the "Q" suffix denotes AEC-Q101 qualification, while all electrical, thermal, and mechanical specifications match the commercial BZT52C2V4S-7-F. No layout or schematic changes are needed; the Q-grade part offers enhanced reliability validation for automotive applications.