Diodes Incorporated BZT52C5V1S-7-F

Overview

BZT52C5V1S-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 5.1 V zener voltage (4.8–5.4 V range at 5 mA), 200 mW power dissipation, and SOD323 package. It provides precision voltage regulation in low-power biasing, overvoltage protection, and reference applications for industrial sensor signal conditioning circuits.

For engineers reviewing the BZT52C5V1S-7-F datasheet, BZT52C5V1S-7-F pinout, BZT52C5V1S-7-F application, or BZT52C5V1S-7-F equivalent, key selection criteria include zener voltage tolerance (±6%), dynamic impedance (60 Ω @ 5 mA), temperature coefficient (−2.7 mV/°C), reverse leakage (1 µA @ 2 V), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

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

The device exhibits a negative temperature coefficient of −2.7 mV/°C, enabling predictable drift compensation in temperature-sensitive references. With 1 µA maximum reverse current at 2 V and 480 Ω maximum knee impedance, it delivers sharp knee behavior suitable for precision clamping and low-current regulation.

Key Specifications

Pinout & Package

Package: SOD323 - ultra-compact plastic surface-mount case with matte tin-plated alloy 42 leadframe, moisture sensitivity level 1, and UL 94V-0 flammability rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5221BS-7-F and BZX84-C5V1, BZT52C5V1S-7-F offers tighter voltage tolerance at 5.1 V, automotive qualification, and optimized thermal performance in the compact SOD323 form factor-making it preferred for space-constrained, safety-critical, or temperature-stable reference designs.

Availability

BZT52C5V1S-7-F is available at Aetrix Electronics and suitable for industrial sensor biasing, automotive ECU reference circuits, and USB port voltage clamping requiring stable component supply and long-term lifecycle support.

Supply support for BZT52C5V1S-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' high-reliability Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in automotive, industrial, and consumer electronics.

FAQ

What is the maximum reverse voltage before breakdown for BZT52C5V1S-7-F?

The device enters controlled breakdown at its nominal zener voltage of 5.1 V, with guaranteed operation between 4.8 V and 5.4 V at 5 mA test current. Below 2 V reverse bias, leakage remains ≤1 µA; sustained voltage above 5.4 V risks exceeding power limits unless current is strictly limited by external series resistance.

Is BZT52C5V1S-7-F suitable for use in high-humidity environments?

Yes-its SOD323 package meets J-STD-020 moisture sensitivity level 1, meaning it can be stored indefinitely at ≤30°C/85% RH without baking prior to reflow. The molded plastic housing and annealed matte tin plating provide robust corrosion resistance for industrial and automotive under-hood applications.

How does the −2.7 mV/°C temperature coefficient affect circuit accuracy?

Over a 100°C range (−40°C to +60°C), the zener voltage shifts by approximately ±270 mV, or ±5.3% of nominal 5.1 V. For applications requiring better than ±1% stability, external compensation (e.g., thermistor network) or selection of a zero-TC device like BZT52C6V2S is recommended.

Can BZT52C5V1S-7-F replace a 5.0 V Zener in an existing design?

Yes, provided the 5.1 V nominal value and ±6% tolerance (4.8–5.4 V) meet system margin requirements. Its 60 Ω dynamic impedance and 1 µA leakage at 2 V are comparable to legacy 5.0 V Zeners; verify that the 0.1 V offset does not violate downstream logic thresholds or ADC reference tolerances.