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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation 1N4934G B0G

Name: 1N4934G B0G
Brand: Taiwan Semiconductor Corporation
SKU: 1N4934G B0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4934G B0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: 1N4934G B0G.pdf

Description:: DIODE GEN PURP 100V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:9,926

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Product details

Overview

1N4934G from Taiwan Semiconductor is a 1A, 100V fast recovery rectifier diode in DO-41 package, featuring 200ns reverse recovery time, 1.2V max forward voltage at 1A, and 30A surge capability - used in switching-mode power supplies and DC-DC converters.

For engineers reviewing the 1N4934G datasheet, 1N4934G pinout, 1N4934G application, or 1N4934G equivalent, key selection criteria include V_RRM = 100 V, I_F = 1 A, t_rr ≤ 200 ns, thermal resistance R_θJA = 65 °C/W, and DO-204AL mechanical compatibility.

Technical Context

This single-die, axial-leaded fast recovery rectifier operates with low conduction loss (V_F ≤ 1.2 V @ 1 A) and rapid charge removal (t_rr ≤ 200 ns), enabling high-frequency switching in offline SMPS and flyback converters.

Its 100 V repetitive peak reverse voltage (V_RRM) and 30 A non-repetitive surge rating (I_FSM) support robust operation under transient overloads, while junction temperature range (–55°C to +150°C) ensures reliability in industrial ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - maximum repetitive reverse blocking voltage without breakdown
I_F	1 A continuous - average forward current rating at 75°C ambient
t_rr	≤ 200 ns - reverse recovery time defining minimum switching frequency limit
V_F	≤ 1.2 V @ 1 A, 25°C - forward voltage drop impacting conduction loss and thermal design
I_FSM	30 A @ 8.3 ms - peak surge current handling for line-start or fault transients
R_θJA	65 °C/W - junction-to-ambient thermal resistance for PCB-mount thermal estimation

Pinout & Package

DO-204AL (DO-41) axial package with cathode band marking; leads are pure tin plated, solderable per J-STD-002, UL 94V-0 molded compound, and JESD 201 Class 2 whisker compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry	Connected to lower-potential side of rectified path; polarity must match input source
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output rail or switching node; blocks reverse voltage up to 100 V

Key Features

Feature	Design Value
Fast recovery (t_rr ≤ 200 ns)	Enables efficient operation up to ~100 kHz switching frequencies in SMPS
Low V_F (≤ 1.2 V @ 1 A)	Reduces conduction loss and thermal load vs. standard rectifiers
30 A surge rating (I_FSM)	Withstands inrush and short-circuit transients without failure
DO-204AL (DO-41) package	Standard axial footprint compatible with legacy through-hole assembly and reflow

Applications

AC-DC Adapter Power Supply	DC-DC Buck Converter Output Stage
Use Scenario: Rectifying 50/60 Hz or high-frequency AC input in wall adapters for consumer electronics. IC Role / Device Role / Timing Role: Primary-side fast recovery rectifier converting transformer secondary AC to unregulated DC. Use Value: 200 ns t_rr minimizes switching loss during high-frequency transformer reset cycles.	Use Scenario: Output freewheeling diode in non-synchronous buck converter powering FPGA or microcontroller rails. IC Role / Device Role / Timing Role: Freewheeling path during low-side switch off-time; conducts 1 A continuous output current. Use Value: 1.2 V V_F limits power dissipation to ≤1.2 W at full load, easing thermal management.
Industrial Motor Drive Snubber	Automotive Auxiliary Power Module
Use Scenario: Clamping inductive kickback from relay coils or small brush motors in PLC I/O modules. IC Role / Device Role / Timing Role: Transient suppression diode across inductive loads; handles repetitive 30 A surges. Use Value: 30 A I_FSM rating ensures survivability under repeated coil de-energization events.	Use Scenario: Secondary-side rectification in 12 V auxiliary power supply for infotainment or ADAS sensors. IC Role / Device Role / Timing Role: Fast recovery rectifier in isolated flyback output stage operating at 65–100 kHz. Use Value: DO-41 package supports automated insertion; 100 V V_RRM accommodates reflected transients in automotive 24 V systems.

AC-DC Adapter Power Supply

DC-DC Buck Converter Output Stage

Use Scenario: Rectifying 50/60 Hz or high-frequency AC input in wall adapters for consumer electronics.

IC Role / Device Role / Timing Role: Primary-side fast recovery rectifier converting transformer secondary AC to unregulated DC.

Use Value: 200 ns t_rr minimizes switching loss during high-frequency transformer reset cycles.

Use Scenario: Output freewheeling diode in non-synchronous buck converter powering FPGA or microcontroller rails.

IC Role / Device Role / Timing Role: Freewheeling path during low-side switch off-time; conducts 1 A continuous output current.

Use Value: 1.2 V V_F limits power dissipation to ≤1.2 W at full load, easing thermal management.

Industrial Motor Drive Snubber

Automotive Auxiliary Power Module

Use Scenario: Clamping inductive kickback from relay coils or small brush motors in PLC I/O modules.

IC Role / Device Role / Timing Role: Transient suppression diode across inductive loads; handles repetitive 30 A surges.

Use Value: 30 A I_FSM rating ensures survivability under repeated coil de-energization events.

Use Scenario: Secondary-side rectification in 12 V auxiliary power supply for infotainment or ADAS sensors.

IC Role / Device Role / Timing Role: Fast recovery rectifier in isolated flyback output stage operating at 65–100 kHz.

Use Value: DO-41 package supports automated insertion; 100 V V_RRM accommodates reflected transients in automotive 24 V systems.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600 V, t_rr = 75 ns, V_F = 1.15 V @ 1 A - higher voltage, faster, lower V_F	Used where higher reverse margin or tighter EMI control required	Select when system requires >100 V blocking or <100 ns t_rr; not drop-in due to different V_RRM and thermal profile
ON Semiconductor MUR110	V_RRM = 100 V, t_rr = 75 ns, V_F = 0.92 V @ 1 A - same V_RRM, faster, lower V_F, TO-220AC package	Preferred in higher-power or heatsink-mounted designs	Choose for improved efficiency and thermal performance; requires PCB layout change due to TO-220 footprint

Compared with STTH1R06 and MUR110, the 1N4934G offers cost-effective DO-41 compatibility and sufficient speed for ≤100 kHz designs, while trading off V_F and t_rr for ease of through-hole integration and legacy BOM continuity.

Availability

1N4934G is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC buck converters, industrial motor drive snubbers, and automotive auxiliary power modules requiring stable component supply and long-term manufacturability.

Supply support for 1N4934G 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 industrial, computing, and consumer markets since 1979.

The 1N493xG series belongs to TSC's fast recovery rectifier product line, engineered for high-efficiency, high-reliability AC/DC and DC/DC conversion in cost-sensitive, space-constrained applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the 1N4934G?

The 1N4934G has a maximum repetitive peak reverse voltage (V_RRM) of 100 V, as specified in the Absolute Maximum Ratings table. This value defines the highest reverse voltage the diode can block repeatedly without breakdown under normal operating conditions at T_A = 25°C. Exceeding this rating risks irreversible avalanche failure.

Does the 1N4934G meet AEC-Q101 automotive qualification?

No, the standard 1N4934G is not AEC-Q101 qualified. Only variants marked with suffix "H" (e.g., 1N4934GH) are AEC-Q101 qualified. The 1N4934G uses the same die and DO-41 package but lacks the extended stress testing and traceability required for automotive-grade certification.

What is the typical forward voltage (V_F) of the 1N4934G at 1 A and 25°C?

The 1N4934G has a maximum forward voltage (V_F) of 1.2 V at I_F = 1 A and T_J = 25°C, per the Electrical Specifications table. Typical V_F is not published, but the max value ensures worst-case conduction loss calculation for thermal design - e.g., 1.2 W dissipation at full rated current.

Can the 1N4934G be used as a replacement for the 1N4004 in a 100 V circuit?

Yes, the 1N4934G is a direct functional upgrade to the 1N4004 in 100 V applications: both share DO-41 packaging and 100 V V_RRM, but the 1N4934G offers faster recovery (200 ns vs. 30 µs), lower V_F (1.2 V vs. 1.1 V typical), and higher surge rating (30 A vs. 30 A), making it superior for switching circuits.

What is the junction-to-ambient thermal resistance (R_θJA) of the 1N4934G?

The junction-to-ambient thermal resistance (R_θJA) of the 1N4934G is 65 °C/W, measured on a standard FR-4 PCB with minimal copper area. This value enables estimation of junction temperature rise under steady-state conduction - e.g., at 1 A and 1.2 V drop, T_J rise ≈ 78°C above ambient, assuming no heatsinking.

1N4934G B0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Bulk

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 200 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 100 V

Capacitance @ Vr, F:: 10pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

Operating Temperature - Junction:: -55°C ~ 150°C

1N4934G B0G FAQ

1.How can I place an order for 1N4934G B0G through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4934G B0G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 1N4934G B0G reliable?

The price and inventory of 1N4934G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4934G B0G is usually 5 days.

3.What payment methods are accepted for 1N4934G B0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4934G B0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4934G B0G?

1N4934G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4934G B0G order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 1N4934G B0G?

For technical support, including 1N4934G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4934G B0G requirements.

6.How does Aetrix verify that 1N4934G B0G is sourced from the original manufacturer or authorized distributors?

All 1N4934G B0G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N4934G B0G meets industry standards.

7.What is the process for return or replacement of 1N4934G B0G?

All 1N4934G B0G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4934G B0G, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 1N4934G B0G part is unused and in its original packaging.

Return procedure for 1N4934G B0G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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