Diodes Incorporated BZT52C8V2T-7

Overview

BZT52C8V2T-7 from Diodes Incorporated is a surface-mount Zener diode with nominal 8.2 V zener voltage (±5% tolerance), 300 mW power dissipation, and 15 Ω dynamic impedance at 5 mA test current. It operates from −55 °C to +150 °C and is used for precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.

For engineers reviewing the BZT52C8V2T-7 datasheet, BZT52C8V2T-7 pinout, BZT52C8V2T-7 application, or BZT52C8V2T-7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (417 °C/W), SOD523 package footprint compatibility, reverse leakage at 5.0 V (≤0.7 µA), and automotive-grade qualification path via Q-suffix variants.

Technical Context

This device functions as a two-terminal voltage reference by operating in reverse breakdown mode with controlled knee characteristics. Its 8.2 V nominal zener voltage exhibits a positive temperature coefficient of +3.2 mV/°C, enabling stable regulation across industrial temperature ranges.

The SOD523 package delivers high power density (300 mW) in a 1.25 mm × 0.85 mm footprint, with cathode band marking and matte tin–annealed terminals ensuring reliable solderability per MIL-STD-202. Thermal resistance to ambient (417 °C/W) is specified on FR-4 board with 2 oz copper and 1.92 mm² pad area.

Key Specifications

Pinout & Package

Two-terminal device in SOD523 package: anode and cathode marked by molded cathode band on top surface. No internal leads or multi-pin configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5231BS-7-F and BZX384-B8V2,115, BZT52C8V2T-7 offers superior regulation stability (15 Ω Z_ZT, 0.7 µA I_R) in the smallest footprint (SOD523), making it optimal for space-constrained, high-accuracy voltage reference designs.

Availability

BZT52C8V2T-7 is available at Aetrix Electronics and suitable for USB power protection, industrial sensor biasing, and automotive body control module designs requiring stable component supply and long-term manufacturability.

Supply support for BZT52C8V2T-7 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q standards.

The BZT52C series belongs to Diodes' general-purpose Zener diode product line, engineered for reliable voltage regulation and transient suppression in cost-sensitive, high-volume consumer, industrial, and automotive applications.

FAQ

What is the maximum reverse voltage (V_R) that BZT52C8V2T-7 can withstand before breakdown?

The device exhibits a sharp, well-defined breakdown at its nominal 8.2 V zener voltage when reverse biased. Its absolute maximum reverse voltage rating is not separately defined; instead, the 8.2 V value (with ±5% tolerance) is the designed conduction threshold at 5 mA test current. Operation above this voltage in reverse bias initiates controlled avalanche conduction.

Does BZT52C8V2T-7 have automotive qualification?

The standard BZT52C8V2T-7 is not AEC-Q200 qualified, but Diodes offers a pin-identical automotive-grade variant designated BZT52C8V2TQ-7-F, which undergoes full AEC-Q200 stress testing and is manufactured in IATF 16949-certified facilities. This Q-suffix version is required for automotive applications.

How does the SOD523 package affect thermal performance compared to larger packages like SOD123?

The SOD523 package has higher thermal resistance (417 °C/W) than SOD123 (typically ~200 °C/W), limiting its usable power dissipation in still-air conditions. However, its small size allows dense layout and improved thermal coupling to adjacent copper pours, enabling effective heat spreading when properly routed on PCBs with thermal vias and ground planes.

Can BZT52C8V2T-7 be used in series or parallel configurations for higher voltage or current capability?

Series connection is not recommended due to mismatched zener voltage tolerances (±5%) causing uneven voltage sharing and potential thermal runaway. Parallel operation is also discouraged because minor differences in V_Z and dynamic impedance lead to current hogging. For higher power, use a single higher-rated Zener or switch to a dedicated voltage reference IC.