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

Taiwan Semiconductor Corporation 1N4935G-K

Name: 1N4935G-K
Brand: Taiwan Semiconductor Corporation
SKU: 1N4935G-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4935G-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: 1N4935G-K.pdf

Description:: 200NS, 1A, 200V, FAST RECOVERY R

Quantity:: RFQ Add To RFQ list

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Inventory:3,054

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Product details

Overview

1N4935G-K from Taiwan Semiconductor is a single-die fast recovery rectifier diode rated for 200 V repetitive peak reverse voltage (V_RRM), 1 A average forward current (I_F), and 30 A non-repetitive surge current (I_FSM). It features 200 ns reverse recovery time (t_rr), 1.2 V max forward voltage at 1 A, and operates up to +150 °C junction temperature - deployed in DC-DC converters and switching-mode inverters.

For engineers reviewing the 1N4935G-K datasheet, 1N4935G-K pinout, 1N4935G-K application, or 1N4935G-K equivalent, key selection criteria include V_RRM = 200 V, t_rr ≤ 200 ns, DO-41 package compatibility, thermal resistance R_θJA = 65 °C/W, and RoHS/halogen-free compliance per IEC 61249-2-21.

Technical Context

This device is a silicon planar epitaxial fast recovery rectifier with a single PN junction optimized for high-efficiency switching power supplies. Its 200 ns reverse recovery time enables operation in 20–100 kHz SMPS topologies while limiting switching losses.

The DO-204AL (DO-41) axial package supports through-hole mounting and provides 65 °C/W junction-to-ambient thermal resistance. Cathode polarity is marked by a visible band; leads are pure tin-plated and J-STD-002 solderable.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage before breakdown; defines usable input voltage range in AC/DC front-ends.
I_F	1 A continuous - Average forward current rating at T_A = 75 °C; sets output power capability in low-power DC-DC stages.
t_rr	200 ns - Measured under I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables efficient operation in 50–100 kHz switchers.
V_F	1.2 V max at I_F = 1 A, T_J = 25 °C - Forward conduction loss directly impacts efficiency and thermal rise in rectification paths.
R_θJA	65 °C/W - Junction-to-ambient thermal resistance in free-air; determines required heatsinking for 1 A continuous operation.
I_FSM	30 A - Peak non-repetitive surge current (8.3 ms half-sine); withstands inrush and transient overloads without failure.

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, epoxy-molded case meeting UL 94V-0. Cathode indicated by band; leads are pure tin-plated and J-STD-002 compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry	Connected to lower-potential side of circuit (e.g., transformer secondary center-tap or switch node).
Cathode	Forward current exit / reverse blocking terminal	Marked with band; connects to output rail or filter capacitor positive; blocks 200 V reverse voltage.

Key Features

Feature	Design Value
Fast recovery time	t_rr ≤ 200 ns ensures minimal switching loss and EMI in 50–100 kHz SMPS designs.
Low forward voltage	V_F ≤ 1.2 V at 1 A reduces conduction loss and improves system efficiency above 85% in low-voltage outputs.
High surge robustness	I_FSM = 30 A handles cold-start inrush and line transients without degradation.
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS; supports environmentally regulated industrial and consumer production.

Applications

DC-DC Converter Output Rectification	Switch-Mode Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V at ≤1 A. IC Role / Device Role / Timing Role: Fast recovery rectifier conducting during transformer demagnetization phase; replaces slower 1N400x series. Use Value: 200 ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving efficiency by ~1.5% vs. standard recovery diodes.	Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters. IC Role / Device Role / Timing Role: Clamp-inductive kickback during MOSFET turn-off; conducts only during brief off-state intervals. Use Value: 30 A I_FSM safely absorbs energy from 20–50 mH loads switched at ≤100 kHz without thermal runaway.
AC-DC Adapter Input Bridge	Industrial Sensor Power Supply
Use Scenario: One leg of a 4-diode full-wave bridge rectifying 115/230 VAC mains in compact wall adapters. IC Role / Device Role / Timing Role: High-voltage rectifier handling 200 V PIV; used where space limits TO-220 alternatives. Use Value: DO-41 package fits tight PCB layouts; 200 V V_RRM supports universal-input designs with margin for line surges.	Use Scenario: Auxiliary bias supply for analog sensor signal conditioning circuits in PLC modules. IC Role / Device Role / Timing Role: Low-noise, low-leakage rectifier feeding linear regulators powering precision op-amps and ADCs. Use Value: 5 µA max I_R at 25 °C prevents loading of high-impedance feedback networks; 150 µA at 125 °C remains stable over industrial temp range.

DC-DC Converter Output Rectification

Switch-Mode Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V at ≤1 A.

IC Role / Device Role / Timing Role: Fast recovery rectifier conducting during transformer demagnetization phase; replaces slower 1N400x series.

Use Value: 200 ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving efficiency by ~1.5% vs. standard recovery diodes.

Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters.

IC Role / Device Role / Timing Role: Clamp-inductive kickback during MOSFET turn-off; conducts only during brief off-state intervals.

Use Value: 30 A I_FSM safely absorbs energy from 20–50 mH loads switched at ≤100 kHz without thermal runaway.

AC-DC Adapter Input Bridge

Industrial Sensor Power Supply

Use Scenario: One leg of a 4-diode full-wave bridge rectifying 115/230 VAC mains in compact wall adapters.

IC Role / Device Role / Timing Role: High-voltage rectifier handling 200 V PIV; used where space limits TO-220 alternatives.

Use Value: DO-41 package fits tight PCB layouts; 200 V V_RRM supports universal-input designs with margin for line surges.

Use Scenario: Auxiliary bias supply for analog sensor signal conditioning circuits in PLC modules.

IC Role / Device Role / Timing Role: Low-noise, low-leakage rectifier feeding linear regulators powering precision op-amps and ADCs.

Use Value: 5 µA max I_R at 25 °C prevents loading of high-impedance feedback networks; 150 µA at 125 °C remains stable over industrial temp range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R02	V_RRM = 200 V, t_rr = 150 ns, I_F = 1 A, DO-41 - faster recovery but higher V_F (1.3 V typ)	Better for >100 kHz designs; less suitable where conduction loss dominates	Prefer when switching frequency exceeds 80 kHz and thermal headroom allows higher V_F
ON Semi MUR120	V_RRM = 200 V, t_rr = 75 ns, I_F = 1 A, DO-41 - ultrafast but tighter V_F spec (1.15 V max)	Optimized for high-frequency PFC and resonant converters; higher cost	Select when t_rr < 100 ns is mandatory and budget permits premium performance

Compared with STTH1R02 and MUR120, the 1N4935G-K offers balanced trade-offs: sufficient speed for 50–80 kHz converters, lower cost, and proven reliability in high-volume adapter and industrial power supplies - making it ideal for cost-sensitive, thermally constrained designs where 200 ns t_rr is adequate.

Availability

1N4935G-K is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switch-mode inverter freewheeling, and AC-DC adapter input bridges requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 1N4935G-K 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 semiconductor manufacturer specializing in discrete power devices, rectifiers, TVS diodes, and MOSFETs for industrial and consumer power systems.

The 1N493xG-K series was designed specifically for cost-effective, high-reliability fast recovery rectification in compact AC-DC and DC-DC power supplies operating up to 100 kHz.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the 1N4935G-K?

The 1N4935G-K has a V_RRM rating of 200 V, verified in the Absolute Maximum Ratings table on page 2 of the official Taiwan Semiconductor datasheet (Version B2104). This value defines the highest continuous reverse voltage the diode can block without breakdown under normal operating conditions and is strictly specific to the 1N4935G-K variant within the 1N4933G-K to 1N4937G-K family.

Does the 1N4935G-K have a specified reverse recovery time (t_rr)?

Yes, the 1N4935G-K has a maximum reverse recovery time of 200 ns, measured under I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, as stated in the Electrical Specifications table on page 2 of the Taiwan Semiconductor datasheet. This t_rr value is identical across the entire 1N4933G-K to 1N4937G-K series and confirms its classification as a fast recovery rectifier.

What package type is used for the 1N4935G-K?

The 1N4935G-K uses the DO-204AL (DO-41) axial package, confirmed in both the Mechanical Data section and Ordering Information table of the Taiwan Semiconductor datasheet. It features pure tin-plated leads compliant with J-STD-002, a cathode band for polarity identification, and UL 94V-0 rated epoxy molding compound.

Is the 1N4935G-K RoHS and halogen-free compliant?

Yes, the 1N4935G-K is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the Features section of the Taiwan Semiconductor datasheet. The "G" suffix in the part number denotes green (halogen-free) compound, and the device meets JESD 201 Class 1A whisker resistance requirements.

What is the maximum average forward current (I_F) rating for the 1N4935G-K?

The 1N4935G-K is rated for 1 A average forward current (I_F) at ambient temperature, as specified in both the Key Parameters summary and Absolute Maximum Ratings table. This rating assumes proper PCB copper area and free-air convection; derating applies above 75 °C ambient per the Forward Current Derating Curve on page 3 of the datasheet.

1N4935G-K Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 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 @ 200 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

1N4935G-K FAQ

1.How can I place an order for 1N4935G-K through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4935G-K 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 1N4935G-K reliable?

The price and inventory of 1N4935G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4935G-K is usually 5 days.

3.What payment methods are accepted for 1N4935G-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4935G-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4935G-K?

1N4935G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4935G-K 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 1N4935G-K?

For technical support, including 1N4935G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4935G-K requirements.

6.How does Aetrix verify that 1N4935G-K is sourced from the original manufacturer or authorized distributors?

All 1N4935G-K 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 1N4935G-K meets industry standards.

7.What is the process for return or replacement of 1N4935G-K?

All 1N4935G-K units undergo pre-shipment inspection (PSI). If there is an issue with 1N4935G-K, 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 1N4935G-K part is unused and in its original packaging.

Return procedure for 1N4935G-K:

1.Submit a request within 90 days.

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

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