Diodes Incorporated 1N4934G-T

Overview

1N4934G-T from Diodes Incorporated is a 1.0A fast recovery glass passivated rectifier diode in DO-41 package, rated for 100V peak repetitive reverse voltage (V_RRM), 1.2V forward voltage at 1.0A (V_FM), and 200ns reverse recovery time (t_rr). It delivers high-efficiency AC/DC conversion in compact power supplies and DC motor freewheeling circuits.

For engineers reviewing the 1N4934G-T datasheet, 1N4934G-T pinout, 1N4934G-T application, or 1N4934G-T equivalent, key selection criteria include its 30A non-repetitive surge rating, 100°C-rated reverse leakage (100μA), DO-41 mechanical compatibility, RoHS-compliant bright tin plating, and thermal resistance of 100K/W junction-to-ambient.

Technical Context

This discrete rectifier uses a diffused junction and glass passivated die construction to achieve fast switching with low conduction loss. Its 200ns reverse recovery time enables operation in 20–50kHz SMPS front-end rectification and flyback snubber networks where di/dt-induced voltage spikes must be minimized.

The device supports 1.0A average forward current at 75°C ambient when leads are held at ambient temperature at 9.5mm from case, and derates linearly to zero at 150°C junction temperature. Its 15pF junction capacitance at 4V reverse bias impacts high-frequency EMI filtering performance in offline converters.

Key Specifications

Pinout & Package

Package: DO-41 molded plastic case (UL 94V-0), cathode indicated by band, lead finish: bright tin, weight ≈ 0.35g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4934 and STTH1R04, the 1N4934G-T uniquely balances RoHS compliance, DO-41 mountability, and 200ns recovery-making it optimal for cost-sensitive, space-constrained, and environmentally regulated power supply designs.

Availability

1N4934G-T is available at Aetrix Electronics and suitable for AC/DC adapter input rectification, DC motor freewheeling, and switch-mode power supply output stage applications requiring stable component supply and consistent DO-41 form factor.

Supply support for 1N4934G-T 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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The 1N493xG series belongs to Diodes' general-purpose fast recovery rectifier product line, engineered specifically for high-efficiency, low-cost AC/DC conversion in consumer, industrial, and computing power supplies.

FAQ

What is the maximum junction temperature for continuous operation of the 1N4934G-T?

The 1N4934G-T has an operating junction temperature range of –65°C to +150°C. For reliable continuous operation, junction temperature must remain ≤150°C under worst-case ambient, power dissipation, and PCB thermal conditions. Derating curves in the datasheet show I_O drops to zero at 150°C ambient when mounted per specified 9.5mm lead length.

Can the 1N4934G-T replace a 1N4004 in a 12V DC power supply?

Yes-the 1N4934G-T offers identical DO-41 packaging and 1.0A current rating, but with faster 200ns recovery (vs. 30μs for 1N4004) and lower 1.2V forward drop (vs. ~1.1V). It improves efficiency in higher-frequency supplies and reduces switching noise, though no layout change is needed due to pin-for-pin compatibility.

Is the 1N4934G-T suitable for use in a full-wave bridge configuration?

Yes-four 1N4934G-T diodes can construct a discrete full-wave bridge rectifier. Each device handles one quadrant with its 100V V_RRM supporting up to 70V RMS input. The 30A surge rating accommodates brief inrush currents, and glass passivation ensures stability across temperature and humidity cycles in enclosed enclosures.

Does the "-T" suffix indicate tape-and-reel packaging?

Yes-the "-T" suffix denotes 5,000-piece tape-and-reel packaging on 13-inch reels, optimized for automated SMT placement. This differs from the "-BULK" variant and ensures consistent feeding, reduced handling damage, and traceability for high-volume production lines requiring IPC-7351-compliant DO-41 footprints.