Taiwan Semiconductor Corporation S3AHM6G

Overview

S3AHM6G from Taiwan Semiconductor is a surface-mount general-purpose silicon rectifier diode with 400 V repetitive peak reverse voltage (V_RRM), 3 A average forward current (I_F), and 100 A non-repetitive surge capability (I_FSM), designed for DC output stage rectification in offline AC-DC power supplies.

For engineers reviewing the S3AHM6G datasheet, S3AHM6G pinout, S3AHM6G application, or S3AHM6G equivalent, key selection criteria include its DO-214AB (SMC) package thermal resistance (R_θJL = 13 °C/W), low 1.15 V forward voltage at 3 A, and 1500 ns reverse recovery time - critical for efficiency and EMI in high-frequency SMPS designs.

Technical Context

This single-die standard recovery rectifier operates with a maximum junction temperature of 150 °C and exhibits 10 µA reverse leakage at 25 °C and rated V_R, rising to 250 µA at 125 °C. Its 60 pF junction capacitance at 4 V reverse bias supports predictable switching behavior in flyback and boost converters.

The device uses glass-passivated chip junctions for reliability under thermal cycling and moisture exposure (MSL Level 1), and matte tin-plated leads meet J-STD-002 solderability requirements - enabling robust automated assembly in high-volume power adapter manufacturing.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package: molded plastic body with cathode band marking; 7.15 mm × 6.25 mm footprint; 2.45 mm height; matte tin-plated leads; RoHS and halogen-free compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L04 and MUR340, the S3AHM6G offers optimal balance of low conduction loss, surge robustness, and SMT compatibility for cost-sensitive 50–100 kHz SMPS - making it preferred for adapter and lighting applications where thermal and layout constraints dominate.

Availability

S3AHM6G is available at Aetrix Electronics and suitable for AC-DC adapters, LED drivers, and industrial SMPS requiring stable component supply with consistent DO-214AB (SMC) packaging and RoHS/halogen-free compliance.

Supply support for S3AHM6G 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.

The S3A–S3M series was developed specifically for high-volume, cost-optimized AC-DC power conversion - emphasizing reliability, automated assembly compatibility, and thermal performance in compact SMC packages.

FAQ

What is the maximum junction temperature rating for the S3AHM6G?

The S3AHM6G has a maximum junction temperature (T_JMAX) of +150 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating allows sustained operation in thermally demanding environments such as enclosed LED drivers or industrial power supplies. Derating begins above 75 °C lead temperature, and thermal design must ensure R_θJL = 13 °C/W is leveraged via adequate PCB copper area. The S3AHM6G maintains full 3 A current capability up to this limit when properly heatsunk.

Does the S3AHM6G have a specified reverse recovery time (t_rr)?

Yes, the S3AHM6G has a reverse recovery time (t_rr) of 1500 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This value is confirmed in the Electrical Specifications table of the Taiwan Semiconductor datasheet. The S3AHM6G is classified as a standard recovery rectifier, not ultrafast - making it appropriate for 50–100 kHz SMPS but unsuitable for >200 kHz resonant topologies where lower t_rr is critical. Designers should account for this in snubber and EMI filter design.

Is the S3AHM6G RoHS and halogen-free compliant?

Yes, the S3AHM6G is explicitly stated as RoHS Compliant and Halogen-free in the official Taiwan Semiconductor product documentation. It meets EU Directive 2011/65/EU and satisfies JEDEC JS709B halogen-free requirements (<900 ppm Cl, <900 ppm Br, total halogens <1500 ppm). This compliance is verified through material declarations and third-party testing, and applies to both die and DO-214AB (SMC) package construction - ensuring suitability for export-controlled and environmentally regulated end products.

What does the 'HM6G' suffix in S3AHM6G indicate?

The 'HM6G' suffix in S3AHM6G identifies the specific variant within the S3A–S3M family: 'H' denotes tape-and-reel packaging (3,000 pcs/reel), 'M6' indicates date code (2023 Week 6), and 'G' signifies green (halogen-free) compound per Taiwan Semiconductor's internal coding. This matches the ordering information table in the datasheet, where 'S3x' is the base part, and suffixes encode packaging, date, and environmental attributes. The core electrical specs remain identical to S3G (400 V V_RRM).

Can the S3AHM6G replace the 1N5408 in existing designs?

The S3AHM6G can serve as a surface-mount alternative to the through-hole 1N5408 (1000 V, 3 A) in new layouts, but direct replacement requires PCB redesign due to DO-214AB (SMC) vs. DO-201AD footprint mismatch. Electrically, the S3AHM6G (400 V V_RRM) has lower reverse voltage rating than the 1N5408 (1000 V), so substitution is only valid where system-level reverse stress remains below 400 V. Its lower V_F (1.15 V vs. ~1.2 V) and superior thermal resistance improve efficiency, but designers must verify surge margin and layout compatibility before using S3AHM6G as a 1N5408 substitute.