Taiwan Semiconductor Corporation BZT52B7V5-G RHG

Overview

BZT52B7V5-G from Taiwan Semiconductor is a 7.5 V ±2% tolerance, 410 mW surface-mount Zener diode in SOD-123 package, optimized for low-voltage stabilization and precision voltage reference in space-constrained DC/DC converters and power adapters.

For engineers reviewing the BZT52B7V5-G datasheet, BZT52B7V5-G pinout, BZT52B7V5-G application, or BZT52B7V5-G equivalent, key selection criteria include its 7.35–7.65 V nominal zener voltage at 5 mA, 15 Ω dynamic impedance, 1 µA leakage at 5.0 V reverse bias, +2.5 mV/°C temperature coefficient, and RoHS/halogen-free compliance for industrial and consumer power management designs.

Technical Context

This device operates as a single-die, cathode-banded Zener diode with sharp reverse breakdown characteristics. It delivers stable regulation under 5 mA test current (IZT), exhibits low dynamic impedance (ZZT = 15 Ω) for minimal output voltage variation under load transients, and maintains thermal stability across −55°C to +150°C junction temperature range.

The SOD-123 package enables high-density PCB layouts while supporting reflow soldering per J-STD-002. Its 357°C/W junction-to-ambient thermal resistance requires careful power derating above 25°C ambient - e.g., maximum dissipation drops to ~280 mW at 75°C ambient.

Key Specifications

Pinout & Package

Package: SOD-123 - surface-mount plastic case with matte tin-plated leads, cathode indicated by band, weight ≈10.54 mg.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5227BS-7-F and 1N4734A-TAP, BZT52B7V5-G offers tighter 2% tolerance and smaller SOD-123 footprint ideal for modern compact power supplies, though it requires stricter thermal management due to its 410 mW limit and higher thermal resistance.

Availability

BZT52B7V5-G is available at Aetrix Electronics and suitable for USB power adapters, industrial sensor modules, on-board DC/DC converters, and low-power microcontroller reset circuits requiring stable component supply with full traceability and lifecycle support.

Supply support for BZT52B7V5-G 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete devices, analog ICs, and power management solutions for industrial, computing, and consumer markets.

The BZT52B series is part of TSC's precision Zener diode portfolio designed specifically for voltage reference and stabilization in high-volume, cost-sensitive power conversion and sensing applications.

FAQ

What is the exact zener voltage range for BZT52B7V5-G at 5 mA test current?

The BZT52B7V5-G has a guaranteed zener voltage range of 7.35 V (minimum) to 7.65 V (maximum) when tested at IZT = 5 mA, reflecting its ±2% tolerance specification. This range is verified per Taiwan Semiconductor's H2002 datasheet revision and applies strictly under 25°C ambient conditions. The nominal value is 7.5 V, and deviations outside this window indicate nonconformance. BZT52B7V5-G must be operated within this specified VZ envelope to meet its published regulation performance.

Does BZT52B7V5-G support reflow soldering, and what is its moisture sensitivity level?

Yes, BZT52B7V5-G supports standard Pb-free reflow soldering per J-STD-020 and is rated at Moisture Sensitivity Level 1 - meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly. Its matte tin-plated leads comply with J-STD-002 for solderability, and the SOD-123 molding compound meets UL 94V-0 flammability requirements. No floor life limitations apply to BZT52B7V5-G, simplifying SMT line logistics.

What is the maximum allowable power dissipation for BZT52B7V5-G at 75°C ambient temperature?

At 75°C ambient, the maximum allowable power dissipation for BZT52B7V5-G is approximately 280 mW, calculated using its 357°C/W junction-to-ambient thermal resistance and 150°C maximum junction temperature: Pmax = (TJmax − TA)/RθJA = (150 − 75)/357 ≈ 0.210 W. This derating is critical for sustained operation - exceeding it risks thermal runaway. BZT52B7V5-G must be thermally modeled in context of PCB copper area and airflow. Full 410 mW rating applies only at TA = 25°C.

How does the temperature coefficient of BZT52B7V5-G affect long-term voltage stability?

The BZT52B7V5-G has a typical temperature coefficient of +2.5 mV/°C at IZTC = 5 mA, meaning its zener voltage increases by ~2.5 mV per degree Celsius rise in junction temperature. Over a −40°C to +125°C operating range, this yields ~413 mV total drift - manageable in compensated designs but significant for unbuffered references. For stable biasing, pair BZT52B7V5-G with low-TC resistors and avoid self-heating; its positive TC also enables simple compensation against negative-TC components in mixed-signal systems.

Is BZT52B7V5-G compatible with lead-free and halogen-free manufacturing standards?

Yes, BZT52B7V5-G is fully compliant with RoHS Directive 2015/863 and halogen-free per IEC 61249-2-21, with bromine and chlorine content below 900 ppm each. Its molding compound, lead finish, and internal construction contain no intentionally added halogens or restricted substances. Taiwan Semiconductor certifies BZT52B7V5-G for use in green electronics manufacturing, and material declarations are available upon request. BZT52B7V5-G meets IPC-1752A reporting requirements for supply chain transparency.