Diodes Incorporated BZT52C8V2TQ-7-F

Overview

BZT52C8V2TQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 8.2 V zener voltage, 5 mA test current, 15 Ω dynamic impedance at 5 mA, 0.7 µA maximum reverse leakage at 5.0 V, and ±3.2 mV/°C temperature coefficient. It operates from −55 °C to +150 °C and delivers precise voltage regulation in low-power biasing and reference circuits.

For engineers reviewing the BZT52C8V2TQ-7-F datasheet, BZT52C8V2TQ-7-F pinout, BZT52C8V2TQ-7-F application, or BZT52C8V2TQ-7-F equivalent, this part serves as a compact, AEC-Q qualified (Q-suffix) voltage reference for automotive sensor signal conditioning, power supply feedback loops, and overvoltage protection in space-constrained PCBs.

Technical Context

This Zener diode uses a planar silicon junction structure optimized for stable breakdown behavior under low-current reverse bias. Its 8.2 V nominal zener voltage is specified at 5 mA test current with tight tolerance (±0.5 V), and its temperature coefficient of +3.2 mV/°C enables predictable drift compensation in mid-voltage reference designs.

The device exhibits 15 Ω zener impedance at 5 mA and 80 Ω at 1 mA, confirming low dynamic resistance for high regulation accuracy. Reverse leakage remains ≤0.7 µA at VR = 5.0 V, supporting low-quiescent-current applications such as battery monitoring and precision analog front-ends.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-compact surface-mount plastic package (1.25 mm × 0.85 mm × 0.65 mm), halogen- and antimony-free, RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5231BS-7-F and BZX84-C8V2-7-F, BZT52C8V2TQ-7-F offers superior regulation accuracy (15 Ω vs. 25 Ω/-), smallest footprint (SOD523), and automotive qualification - making it optimal for space- and reliability-critical designs where low leakage and tight voltage control are mandatory.

Availability

BZT52C8V2TQ-7-F is available at Aetrix Electronics and suitable for automotive sensor modules, USB interface protection circuits, and industrial power supply feedback networks requiring stable component supply with full traceability and AEC-Q200 compliance.

Supply support for BZT52C8V2TQ-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, specializing in high-reliability components for automotive, industrial, and consumer markets with ISO/TS 16949 and ISO 9001 certification.

This part belongs to the BZT52C series of precision Zener diodes designed specifically for voltage reference and overvoltage protection in compact, high-reliability applications - especially those demanding AEC-Q200 qualification and green material compliance.

FAQ

What is the maximum reverse voltage (V_R) at which leakage current is guaranteed?

The datasheet specifies maximum reverse leakage current (I_R) ≤0.7 µA at V_R = 5.0 V. This value is measured and guaranteed per JEDEC-standard test conditions at T_A = +25 °C. At V_R = 6.2 V, leakage rises to ≤1.0 µA; no guarantee is provided beyond 6.2 V due to proximity to the 7.7 V minimum zener onset.

Is BZT52C8V2TQ-7-F suitable for use in a 12 V automotive system's overvoltage clamp?

Yes - its 8.2 V nominal zener voltage and 8.7 V maximum V_Z ensure reliable clamping below typical 13.5–14.5 V alternator output peaks. With 300 mW power rating and −55 °C to +150 °C operating range, it withstands sustained overvoltage events in engine bay environments when properly heatsinked on 2 oz copper.

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

With +3.2 mV/°C coefficient, V_Z shifts ≈+512 mV over 160 °C span - from ~7.7 V at −40 °C to ~8.2 V at +25 °C to ~8.7 V at +125 °C. For high-accuracy references, this drift must be compensated via circuit design (e.g., pairing with negative-TC components) or calibrated out in digital systems.

Can this diode replace a 5.1 V Zener in an existing design?

No - BZT52C8V2TQ-7-F is not a functional substitute for 5.1 V Zeners like BZT52C5V1T due to fundamental voltage mismatch. Its 8.2 V regulation point would disrupt feedback thresholds, bias points, or clamping levels. Substitution requires full circuit reanalysis and validation of all voltage-dependent behaviors.