Taiwan Semiconductor Corporation MMSZ4682 RHG

Overview

MMSZ4682 RHG from Taiwan Semiconductor is a surface-mount Zener diode with a nominal zener voltage of 2.7 V, 500 mW power dissipation, and SOD-123 package. It provides precise voltage regulation and overvoltage protection in low-power analog circuits, microcontroller I/O clamping, and reference voltage generation for sensor signal conditioning.

For engineers reviewing the MMSZ4682 RHG datasheet, MMSZ4682 RHG pinout, MMSZ4682 RHG application, or MMSZ4682 RHG equivalent, key selection criteria include its 2.565–2.835 V zener voltage tolerance at 50 mA test current, 1.0 µA leakage current at 1.0 V reverse bias, and thermal resistance of 340 °C/W on a 5 cm × 5 cm copper pad - critical for compact, thermally constrained designs.

Technical Context

The MMSZ4682 RHG operates as a silicon planar Zener diode optimized for stable reverse-biased breakdown in low-current regulation roles. Its 2.7 V nominal zener voltage targets low-voltage logic-level clamping and precision biasing where tighter voltage control than standard diodes is required.

Designed for surface-mount assembly, it features matte tin-plated leads compliant with J-STD-002 solderability standards and moisture sensitivity level 1 per J-STD-020 - enabling reflow compatibility without dry-pack handling. The SOD-123 package supports high-density PCB layouts while maintaining thermal performance up to 150 °C junction temperature.

Key Specifications

Pinout & Package

SOD-123 is a two-terminal surface-mount plastic package with cathode indicated by a visible band. Terminals are matte tin-plated and solderable per J-STD-002. Weight is approximately 10.97 mg.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B2V7,115 and MMBZ5223BS-7-F, the MMSZ4682 RHG offers higher 500 mW power handling in SOD-123 - making it preferable for applications needing robust transient energy absorption without thermal derating penalties.

Availability

MMSZ4682 RHG is available at Aetrix Electronics and suitable for microcontroller I/O protection, sensor reference voltage generation, and low-voltage power rail clamp applications requiring stable component supply and full traceability.

Supply support for MMSZ4682 RHG 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 MMSZ4682 RHG belongs to TSC's MMSZ4678–MMSZ4716 Zener diode family, engineered for high-volume, cost-sensitive applications demanding tight voltage tolerance, RoHS compliance, and reflow-ready packaging.

FAQ

What is the zener voltage tolerance of MMSZ4682 RHG at 50 mA test current?

The MMSZ4682 RHG has a zener voltage range of 2.565 V (minimum) to 2.835 V (maximum) at I_ZT = 50 mA, corresponding to ±4% tolerance around the nominal 2.7 V rating. This specification is guaranteed per the Taiwan Semiconductor datasheet Version A2311 and applies under TA = 25°C conditions. Designers should verify worst-case regulation across temperature and current in final circuit validation.

Is MMSZ4682 RHG compatible with lead-free reflow soldering processes?

Yes, the MMSZ4682 RHG is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its moisture sensitivity level is rated at Level 1 per J-STD-020 - meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly. The SOD-123 package withstands peak reflow temperatures up to 260°C.

What is the maximum reverse leakage current for MMSZ4682 RHG?

The maximum reverse leakage current for MMSZ4682 RHG is 1.0 µA at V_R = 1.0 V and TA = 25°C. This value is specified in the Electrical Specifications table of the official Taiwan Semiconductor datasheet. Leakage remains stable across industrial temperature ranges and supports ultra-low-power applications such as battery-backed sensor nodes where standby current must be minimized.

Does MMSZ4682 RHG have a defined zener impedance value?

The MMSZ4682 RHG does not specify a typical or maximum zener impedance (Z_ZT) in its published datasheet. However, Figure 4 in the Characteristics Curves section shows dynamic impedance versus zener voltage for the MMSZ4678–MMSZ4716 family, indicating ~15 Ω at I_Z = 5 mA for 2.7 V devices. For precision regulation, designers should refer to the actual curve or characterize Z_Z empirically in target operating conditions.

Can MMSZ4682 RHG be used in place of a 2.7 V voltage reference IC?

The MMSZ4682 RHG can serve as a cost-effective alternative to dedicated 2.7 V reference ICs in non-critical applications where initial accuracy (±4%) and temperature drift (≈−1.5 mV/°C) are acceptable. Unlike reference ICs, it lacks buffered output or low-output-impedance drive capability. Use MMSZ4682 RHG where simplicity and board-area savings outweigh demands for ppm-level stability or load regulation.