Diodes Incorporated BZT52C2V4S-7-F

Overview

BZT52C2V4S-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 100 Ω zener impedance at 5 mA test current. It operates from −65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in low-power sensor signal conditioning circuits.

For engineers reviewing the BZT52C2V4S-7-F datasheet, BZT52C2V4S-7-F pinout, BZT52C2V4S-7-F application, or BZT52C2V4S-7-F equivalent, key selection factors include its SOD323 package footprint, 1.0 µA reverse leakage at 1.0 V, −3.5 mV/°C temperature coefficient, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Zener diode employs planar die construction for stable breakdown characteristics and low dynamic impedance. Its cathode-band polarity marking and matte tin–plated Alloy 42 leadframe ensure compatibility with automated SMT assembly and solderability per MIL-STD-202.

Designed for operation at 5 mA test current, it delivers tight 2.20–2.60 V zener voltage range with 625 °C/W junction-to-ambient thermal resistance on FR-4 PCBs using recommended pad layout. Moisture sensitivity is rated Level 1 per J-STD-020.

Key Specifications

Pinout & Package

Package: SOD323 - surface-mount plastic case with cathode band marking; dimensions: 1.30 mm (D) × 1.70 mm (E) × 0.30 mm (b); weight ≈ 0.0049 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5222BS-7-F and BZX384-B2V4,115, BZT52C2V4S-7-F offers tighter V_Z tolerance (±0.2 V vs. ±0.13 V or ±0.1 V), AEC-Q101 qualification, and optimized thermal resistance for automotive PCB layouts-making it the preferred choice where regulation accuracy and automotive reliability are jointly critical.

Availability

BZT52C2V4S-7-F is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial temperature transmitters, medical wearable battery monitors, and consumer IoT power management requiring stable component supply across extended temperature ranges.

Supply support for BZT52C2V4S-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' standard Zener diode product line, engineered specifically for high-reliability voltage reference and protection in automotive, industrial, and medical applications where AEC-Q101 compliance and tight parametric control are essential.

FAQ

What is the maximum reverse voltage (V_R) that BZT52C2V4S-7-F can withstand before breakdown?

The device exhibits 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. At 1.0 V reverse bias, leakage is limited to 50 µA; no defined "maximum non-breakdown voltage" is specified beyond this, as Zener operation begins near the lower end of the V_Z range.

Is BZT52C2V4S-7-F suitable for use in high-humidity environments?

Yes - its SOD323 package carries J-STD-020 Moisture Sensitivity Level 1 rating, meaning it may be stored indefinitely at ≤30 °C/60% RH without baking. The molded plastic case meets UL 94V-0 flammability and has been qualified for operation up to +150 °C, supporting humid under-hood or industrial enclosure deployment.

Does BZT52C2V4S-7-F require external current-limiting resistors in typical voltage-reference configurations?

Yes - like all Zener diodes, it requires a series resistor to limit current to within its 200 mW power rating. For example, at 5 mA test current and 2.4 V drop, the resistor must dissipate ≥(V_IN − 2.4 V) × 5 mA; exceeding 5 mA significantly increases self-heating and degrades voltage stability due to its −3.5 mV/°C temperature coefficient.

How does the −3.5 mV/°C temperature coefficient affect circuit accuracy over temperature?

Over a 100 °C span (e.g., −40 °C to +60 °C), the zener voltage shifts by approximately −350 mV, or −14.6% of nominal 2.4 V. In precision references, this drift must be compensated via circuit topology (e.g., complementary diode pairs) or calibrated out in firmware; it is acceptable for non-critical clamping or coarse biasing where ±5% regulation suffices.