Taiwan Semiconductor Corporation 1N4933G R0G

Overview

1N4933G from Taiwan Semiconductor is a 1A, 50V fast recovery rectifier diode in DO-41 package, featuring 1.2V max forward voltage at 1A, 200ns reverse recovery time, and 30A surge current capability-used in DC-DC converters and switching-mode power supplies.

For engineers reviewing the 1N4933G datasheet, 1N4933G pinout, 1N4933G application, or 1N4933G equivalent, key selection criteria include V_RRM=50V, I_F=1A, t_rr≤200ns, thermal resistance R_θJA=65°C/W, and AEC-Q101 qualification availability (via suffix H variant).

Technical Context

This single-die, axial-leaded fast recovery rectifier operates with low conduction loss (V_F ≤1.2V @ 1A, 25°C) and rapid charge removal (t_rr ≤200ns), enabling high-frequency switching efficiency in offline and isolated DC-DC topologies.

Its DO-204AL (DO-41) package supports through-hole mounting, features pure tin-plated leads compliant with J-STD-002, and delivers 65°C/W junction-to-ambient thermal resistance-critical for thermally constrained 1A continuous operation up to +150°C junction temperature.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41), axial-lead, epoxy-molded case with cathode band polarity marking. Weight: 0.330 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06 and MUR105, the 1N4933G offers optimal cost-performance balance for 50V-rated, thermally constrained 1A rectification-where ultra-fast t_rr or high V_RRM are unnecessary and lead-time or qualification status favors Taiwan Semiconductor's standard offering.

Availability

1N4933G is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and general-purpose power rectification requiring stable component supply across industrial, automotive, and consumer production programs.

Supply support for 1N4933G 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, serving global power, automotive, and industrial markets since 1979.

The 1N4933G belongs to TSC's fast recovery rectifier family designed specifically for high-efficiency, cost-sensitive AC-DC and DC-DC conversion in space-constrained applications up to 1A continuous current.

FAQ

What is the maximum junction temperature rating for the 1N4933G?

The 1N4933G has a maximum junction temperature (T_J) rating of +150°C, with a storage temperature range of −55°C to +150°C. This rating enables reliable operation in high-ambient environments such as enclosed power supplies or under-hood automotive locations when properly heatsinked or mounted on adequate copper area. Thermal design must respect R_θJA = 65°C/W to avoid exceeding this limit under full 1A load.

Is the 1N4933G RoHS and halogen-free compliant?

Yes, the 1N4933G is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its pure tin-plated leads are solderable per J-STD-002. These certifications ensure suitability for environmentally regulated end equipment including industrial controls, consumer electronics, and EU-marketed products-no exemptions or declarations required.

What does the 'G' suffix indicate in 1N4933G?

The 'G' suffix in 1N4933G denotes green (halogen-free) compound packaging and RoHS compliance per TSC's internal part numbering system. It does not indicate AEC-Q101 qualification-that requires the 'H' suffix (e.g., 1N4933GH). The 'G' also identifies the device as part of the 1N4933G–1N4937G family with standardized DO-41 packaging and electrical binning across voltage grades.

How does the reverse recovery time of the 1N4933G affect EMI in switching power supplies?

The 1N4933G's t_rr ≤ 200 ns contributes to moderate dI/dt during turn-off, generating manageable high-frequency ringing in typical 50–150 kHz flyback or forward converters. While slower than ultrafast rectifiers (e.g., <75 ns), this value avoids excessive EMI while maintaining cost and thermal advantages-making the 1N4933G appropriate for non-critical EMI environments where filtering margin exists.

Can the 1N4933G replace a 1N4007 in a 50V circuit?

Yes, the 1N4933G can replace a 1N4007 in a 50V circuit where faster switching is beneficial-its 200ns t_rr is significantly quicker than the 1N4007's ~2 μs, reducing switching loss and improving efficiency in SMPS. However, note that the 1N4933G has lower surge rating (30A vs. 1N4007's 50A) and tighter V_F tolerance; verify surge margin and thermal rise under actual operating conditions before substitution.