Diodes Incorporated BZT52C3V6S-7-F

Overview

BZT52C3V6S-7-F from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 3.6 V, 5 mA test current, 90 Ω maximum zener impedance at 1 kHz, 200 mW power dissipation, and SOD323 package. It provides precise voltage regulation in low-power biasing and reference circuits for automotive and industrial control modules.

For engineers reviewing the BZT52C3V6S-7-F datasheet, BZT52C3V6S-7-F pinout, BZT52C3V6S-7-F application, or BZT52C3V6S-7-F equivalent, key selection criteria include zener voltage tolerance (±5.6%), temperature coefficient (–3.5 to 0 mV/°C), reverse leakage (≤5 µA at 1.0 V), and AEC-Q101 qualification for automotive reliability.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature 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 typical zener voltage range of 3.4 V to 3.8 V at 5 mA, with thermal resistance of 625 °C/W and an operating junction temperature range from –65 °C to +150 °C - enabling use in harsh ambient environments without derating below 25 °C.

Key Specifications

Pinout & Package

SOD323 package: two-terminal surface-mount device with cathode marked by a band on the top surface. Terminals are anode (unmarked end) and cathode (banded end); no internal connection to case or substrate.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4685-7-F and BZX384-C3V6, BZT52C3V6S-7-F offers automotive qualification and optimal thermal performance in compact SOD323 layout, making it preferred for space-constrained automotive modules where reliability under vibration and thermal cycling is mandatory.

Availability

BZT52C3V6S-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply and AEC-Q101 compliance.

Supply support for BZT52C3V6S-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 BZT52 series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage regulation and reference applications in harsh-environment electronic control units.

FAQ

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

The BZT52C3V6S-7-F has a nominal zener voltage of 3.6 V at 5 mA test current, with a guaranteed breakdown range of 3.4 V to 3.8 V. It is not rated for blocking voltages above its zener range - operation above 3.8 V in reverse bias will cause sustained conduction and must be current-limited to avoid exceeding 200 mW dissipation.

Is this part suitable for use in high-humidity environments?

Yes. The SOD323 package uses UL 94V-0 molded plastic and meets J-STD-020 moisture sensitivity Level 1, meaning it can be stored indefinitely at ≤30 °C/85% RH without baking prior to reflow. Its matte tin-plated alloy 42 leadframe also resists corrosion under IPC-J-STD-006 requirements.

How does the temperature coefficient affect voltage stability in automotive applications?

With a temperature coefficient of –3.5 to 0 mV/°C, the BZT52C3V6S-7-F exhibits predictable negative drift: voltage decreases ~0.18% per 10 °C rise. Over the automotive range (–40 °C to +125 °C), total shift is ≤0.6 V - acceptable for non-precision biasing where absolute accuracy is secondary to regulation consistency.

Can this Zener diode replace a 3.3 V variant in an existing design?

No - the 3.6 V nominal rating differs significantly from 3.3 V devices like BZT52C3V3S-7-F. Substituting would raise reference or clamp voltage by ~90 mV, potentially causing overvoltage at downstream nodes or shifting ADC code boundaries. Revalidation of bias networks and thermal margins is required if changing zener voltage.