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

Taiwan Semiconductor Corporation 1N4934G R0G

Name: 1N4934G R0G
Brand: Taiwan Semiconductor Corporation
SKU: 1N4934G R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4934G R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: 1N4934G R0G.pdf

Description:: DIODE GEN PURP 100V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Product details

Overview

1N4934G R0G 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 DC/DC converters and inverters.

For engineers reviewing the 1N4934G R0G datasheet, 1N4934G R0G pinout, 1N4934G R0G application, or 1N4934G R0G 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 discrete silicon PN-junction rectifier operates with fast recovery (t_rr ≤ 200 ns) to minimize switching losses in high-frequency power conversion. Its single-die DO-41 construction supports 1 A continuous forward current and withstands 30 A non-repetitive surge (8.3 ms half-sine).

Designed for operation from –55 °C to +150 °C junction temperature, it delivers low leakage (I_R ≤ 5 µA @ 25 °C, ≤ 150 µA @ 125 °C) and exhibits 10 pF junction capacitance at 1 MHz / 4 V, enabling stable performance in SMPS feedback and output stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse voltage before breakdown; defines safe operating limit in DC/DC flyback and buck output rectification.
I_F	1 A - Continuous average forward current rating; determines heatsink-free operation in low-power adapters and auxiliary supplies.
t_rr	≤ 200 ns - Reverse recovery time under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; critical for minimizing switching loss in 50–500 kHz converters.
V_F	≤ 1.2 V @ 1 A, 25 °C - Forward voltage drop; directly impacts conduction loss and thermal rise in high-duty-cycle applications.
R_θJA	65 °C/W - Junction-to-ambient thermal resistance; enables ~1 W dissipation at ΔT = 65 °C without forced air or heatsink.
I_R	≤ 5 µA @ 25 °C - Max reverse leakage at rated V_RRM; ensures minimal standby power loss in always-on circuits.

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) in half-wave rectification.
Cathode	Forward current exit / reverse blocking terminal	Marked by band; ties to output filter capacitor positive rail; blocks reverse voltage up to 100 V.

Key Features

Feature	Design Value
Fast recovery (t_rr ≤ 200 ns)	Reduces switching loss and EMI generation in 100–300 kHz SMPS designs compared to standard rectifiers.
Low V_F (≤ 1.2 V @ 1 A)	Lowers conduction loss by ~15% vs. legacy 1N400x series, improving efficiency in compact 5–12 V output rails.
30 A I_FSM surge rating	Withstands cold-start inrush and transient overloads without degradation in industrial power supplies.
DO-41 mechanical compliance	Enables direct replacement in legacy footprints; UL 94V-0 molding compound supports safety-critical end equipment.

Applications

AC/DC Adapter Output Rectification	DC/DC Buck Converter Freewheeling Diode
Use Scenario: 12 V/1 A isolated flyback adapter powering IoT sensors and smart home controllers. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 200 ns t_rr minimizes voltage overshoot during MOSFET turn-on, reducing snubber losses and improving efficiency by ~2.3% over 1N4007.	Use Scenario: 5 V/1 A synchronous-buck-derived supply where freewheeling path uses discrete diode instead of ideal diode controller. IC Role / Device Role / Timing Role: Freewheeling diode providing current continuity during high-side switch off-time. Use Value: 1.2 V V_F limits power dissipation to < 1.2 W at full load, avoiding thermal derating below 85 °C ambient.
Automotive Body Control Module (BCM) Auxiliary Supply	Industrial PLC Digital Input Protection
Use Scenario: 24 V input to 5 V logic rail in AEC-Q101-compliant BCM subassembly. IC Role / Device Role / Timing Role: Input-stage rectifier after EMI filter and before buck regulator; handles load dump transients. Use Value: 30 A I_FSM withstands ISO 7637-2 Pulse 5a (load dump), eliminating need for external TVS clamping in cost-sensitive designs.	Use Scenario: 24 V digital input channel with reverse polarity and surge protection in DIN-rail mounted PLC. IC Role / Device Role / Timing Role: Polarity protection diode placed in series with input resistor network. Use Value: 100 V V_RRM provides margin above 24 V nominal + 40 V transients (IEC 61000-4-4), while DO-41 leadform allows through-hole mounting on ruggedized PCBs.

AC/DC Adapter Output Rectification

DC/DC Buck Converter Freewheeling Diode

Use Scenario: 12 V/1 A isolated flyback adapter powering IoT sensors and smart home controllers.

IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC.

Use Value: 200 ns t_rr minimizes voltage overshoot during MOSFET turn-on, reducing snubber losses and improving efficiency by ~2.3% over 1N4007.

Use Scenario: 5 V/1 A synchronous-buck-derived supply where freewheeling path uses discrete diode instead of ideal diode controller.

IC Role / Device Role / Timing Role: Freewheeling diode providing current continuity during high-side switch off-time.

Use Value: 1.2 V V_F limits power dissipation to < 1.2 W at full load, avoiding thermal derating below 85 °C ambient.

Automotive Body Control Module (BCM) Auxiliary Supply

Industrial PLC Digital Input Protection

Use Scenario: 24 V input to 5 V logic rail in AEC-Q101-compliant BCM subassembly.

IC Role / Device Role / Timing Role: Input-stage rectifier after EMI filter and before buck regulator; handles load dump transients.

Use Value: 30 A I_FSM withstands ISO 7637-2 Pulse 5a (load dump), eliminating need for external TVS clamping in cost-sensitive designs.

Use Scenario: 24 V digital input channel with reverse polarity and surge protection in DIN-rail mounted PLC.

IC Role / Device Role / Timing Role: Polarity protection diode placed in series with input resistor network.

Use Value: 100 V V_RRM provides margin above 24 V nominal + 40 V transients (IEC 61000-4-4), while DO-41 leadform allows through-hole mounting on ruggedized PCBs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR110E	V_RRM = 100 V, t_rr = 75 ns (faster), V_F = 0.92 V (lower), DO-41 package	Better suited for >300 kHz designs requiring lowest possible switching loss	Select when t_rr < 100 ns is required; verify layout thermal relief for same 1 A rating.
Vishay 1N4934-E3/54	Identical V_RRM, I_F, t_rr, and DO-41 footprint; RoHS-compliant, no AEC-Q101 option	Drop-in replacement where automotive qualification is not mandated	Use for industrial/commercial systems needing second-source availability without AEC-Q101 validation.

Compared with MUR110E and 1N4934-E3/54, the 1N4934G R0G offers balanced speed-efficiency trade-off and AEC-Q101 qualification-making it optimal for cost-sensitive automotive body electronics where 200 ns recovery suffices and qualification traceability is mandatory.

Availability

1N4934G R0G is available at Aetrix Electronics and suitable for DC/DC converters, switching inverters, and general-purpose rectification requiring stable component supply across automotive, industrial control, and consumer power applications.

Supply support for 1N4934G R0G 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 rectifiers, TVS diodes, MOSFETs, and bipolar transistors since 1979.

The 1N4933G–1N4937G family was designed specifically for high-reliability, medium-voltage fast recovery rectification in automotive and industrial power supplies-emphasizing surge robustness, thermal stability, and AEC-Q101 compliance.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the 1N4934G R0G?

The 1N4934G R0G has a V_RRM of 100 V, verified in the Absolute Maximum Ratings table of Taiwan Semiconductor's I2104 datasheet. This rating defines the highest reverse voltage the diode can block repeatedly without breakdown and applies across its full operating temperature range (–55 °C to +150 °C). It is distinct from the 50 V (1N4933G) and 200 V (1N4935G) variants in the same family.

Is the 1N4934G R0G AEC-Q101 qualified?

No-the 1N4934G R0G is not AEC-Q101 qualified. Only part numbers ending in "H" (e.g., 1N4934GH) carry AEC-Q101 qualification per the Ordering Information section. The "R0G" suffix denotes tape-and-reel packaging (5,000 pcs) with green compound, but does not imply automotive qualification. For AEC-Q101 use, specify 1N4934GH or 1N4934GHA0G.

What is the reverse recovery time (t_rr) of the 1N4934G R0G and under what test conditions?

The 1N4934G R0G has a maximum reverse recovery time (t_rr) of 200 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the Electrical Specifications table. This value is typical for fast recovery rectifiers in the 100 V class and is confirmed across the 1N4933G–1N4937G family. It is not guaranteed at higher currents or elevated temperatures.

Can the 1N4934G R0G replace a 1N4007 in a 12 V power supply?

The 1N4934G R0G can replace a 1N4007 only if V_RRM ≥ 1000 V is not required. While both are DO-41 rectifiers, the 1N4934G R0G offers faster recovery (200 ns vs. ~2 μs) and lower V_F (1.2 V vs. ~1.7 V), improving efficiency-but its 100 V V_RRM is insufficient for 12 V supplies with high-voltage transients or AC line-derived inputs. Use only in low-V_R DC/DC outputs.

What is the junction-to-ambient thermal resistance (R_θJA) of the 1N4934G R0G?

The 1N4934G R0G has a typical R_θJA of 65 °C/W, as specified in the Thermal Performance section of the datasheet. This value assumes standard JEDEC test conditions (single device on FR-4 board, 1 in² copper pad). Actual thermal performance depends on PCB copper area, airflow, and mounting orientation-derate I_F linearly above 75 °C ambient per the Forward Current Derating Curve.

1N4934G R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

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 R0G FAQ

1.How can I place an order for 1N4934G R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4934G R0G 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 R0G reliable?

The price and inventory of 1N4934G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4934G R0G is usually 5 days.

3.What payment methods are accepted for 1N4934G R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4934G R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4934G R0G?

1N4934G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4934G R0G 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 R0G?

For technical support, including 1N4934G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4934G R0G requirements.

6.How does Aetrix verify that 1N4934G R0G is sourced from the original manufacturer or authorized distributors?

All 1N4934G R0G 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 R0G meets industry standards.

7.What is the process for return or replacement of 1N4934G R0G?

All 1N4934G R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4934G R0G, 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 R0G part is unused and in its original packaging.

Return procedure for 1N4934G R0G:

1.Submit a request within 90 days.

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

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