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

Taiwan Semiconductor Corporation FR305G-K

Name: FR305G-K
Brand: Taiwan Semiconductor Corporation
SKU: FR305G-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FR305G-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: FR305G-K.pdf

Description:: 250NS, 3A, 600V, FAST RECOVERY R

Quantity:: RFQ Add To RFQ list

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Inventory:6,391

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Product details

Overview

FR305G-K from Taiwan Semiconductor is a 3A, 600V fast recovery rectifier diode in DO-201AD package, featuring 250 ns reverse recovery time, 1.3 V max forward voltage at 3 A, and 125 A surge capability - used in switching-mode DC/DC converters requiring efficient high-voltage rectification.

For engineers reviewing the FR305G-K datasheet, FR305G-K pinout, FR305G-K application, or FR305G-K equivalent, key selection criteria include V_RRM = 600 V, I_F = 3 A, t_rr = 250 ns, thermal resistance R_θJA = 35 °C/W, and DO-201AD mechanical compatibility with through-hole or tape-and-reel assembly.

Technical Context

This single-die fast recovery rectifier operates across -55°C to +150°C junction temperature range and delivers low conduction loss via 1.3 V max V_F at 3 A and 25°C. Its 600 V repetitive peak reverse voltage supports mid-range SMPS input/output stages.

The device exhibits 5 µA max reverse leakage at 25°C and 100 µA at 125°C, with 30 pF typical junction capacitance at 4 V reverse bias and 1 MHz - enabling stable high-frequency switching performance without excessive capacitive loading.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - supports rectification in 400–480 VAC-derived DC bus applications
I_F	3 A continuous - rated for sustained output current in compact 30–60 W SMPS designs
t_rr	250 ns - enables operation up to ~400 kHz switching frequency with controlled turn-off loss
V_F (max)	1.3 V @ 3 A, 25°C - limits conduction loss to ≤3.9 W per diode under full load
R_θJA	35 °C/W - requires minimal heatsinking for ambient temperatures ≤70°C at full load
I_FSM	125 A @ 8.3 ms - withstands inrush surges during cold-start of offline power supplies

Pinout & Package

DO-201AD axial-leaded package with cathode indicated by band; leads are pure tin-plated, solderable per J-STD-002, UL 94V-0 molded compound, and JESD 201 Class 1A whisker compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal	Connected to AC source or transformer secondary side; must handle full RMS current and surge
Cathode	Current exit terminal	Connected to output filter capacitor or load return; polarity marked by band on body

Key Features

Feature	Design Value
Fast recovery time	250 ns - reduces switching loss and EMI generation in high-frequency converters
Low forward voltage	1.3 V max @ 3 A - improves system efficiency by minimizing conduction loss
High surge rating	125 A non-repetitive - ensures robustness against line transients and startup surges
Halogen-free construction	Complies with IEC 61249-2-21 - meets environmental requirements for industrial and consumer end equipment

Applications

DC/DC Converter Output Rectification	Offline SMPS Input Bridge
Use Scenario: Secondary-side synchronous or diode rectification in isolated flyback or forward converters delivering 12–48 V at ≤3 A. IC Role / Device Role / Timing Role: Unidirectional current steering element converting transformer AC to regulated DC output. Use Value: 250 ns t_rr minimizes reverse recovery charge loss, improving efficiency over standard rectifiers at 100–300 kHz.	Use Scenario: Half-wave or full-wave rectification in universal-input (85–265 VAC) offline SMPS front-end. IC Role / Device Role / Timing Role: High-voltage AC-to-DC conversion stage before bulk capacitor and primary switch. Use Value: 600 V V_RRM safely handles 400 VDC peak after rectification, with 125 A I_FSM surviving cold-start surges.
Inverter DC Link Protection	Industrial Motor Drive Snubber
Use Scenario: Freewheeling path in H-bridge inverters driving 24–48 V DC motors or small AC induction loads. IC Role / Device Role / Timing Role: Clamp diode providing safe current recirculation during PWM dead-time and inductive kickback. Use Value: 3 A I_F and 250 ns t_rr ensure reliable commutation without oscillation or voltage overshoot.	Use Scenario: RC snubber network component absorbing turn-off energy from IGBTs or MOSFETs in 3-phase motor drives. IC Role / Device Role / Timing Role: Fast transient clamp limiting voltage spikes across switching devices during dV/dt events. Use Value: Low C_J (30 pF) and fast t_rr prevent parasitic resonance while maintaining clamping speed.

DC/DC Converter Output Rectification

Offline SMPS Input Bridge

Use Scenario: Secondary-side synchronous or diode rectification in isolated flyback or forward converters delivering 12–48 V at ≤3 A.

IC Role / Device Role / Timing Role: Unidirectional current steering element converting transformer AC to regulated DC output.

Use Value: 250 ns t_rr minimizes reverse recovery charge loss, improving efficiency over standard rectifiers at 100–300 kHz.

Use Scenario: Half-wave or full-wave rectification in universal-input (85–265 VAC) offline SMPS front-end.

IC Role / Device Role / Timing Role: High-voltage AC-to-DC conversion stage before bulk capacitor and primary switch.

Use Value: 600 V V_RRM safely handles 400 VDC peak after rectification, with 125 A I_FSM surviving cold-start surges.

Inverter DC Link Protection

Industrial Motor Drive Snubber

Use Scenario: Freewheeling path in H-bridge inverters driving 24–48 V DC motors or small AC induction loads.

IC Role / Device Role / Timing Role: Clamp diode providing safe current recirculation during PWM dead-time and inductive kickback.

Use Value: 3 A I_F and 250 ns t_rr ensure reliable commutation without oscillation or voltage overshoot.

Use Scenario: RC snubber network component absorbing turn-off energy from IGBTs or MOSFETs in 3-phase motor drives.

IC Role / Device Role / Timing Role: Fast transient clamp limiting voltage spikes across switching devices during dV/dt events.

Use Value: Low C_J (30 pF) and fast t_rr prevent parasitic resonance while maintaining clamping speed.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	600 V, 3 A, 75 ns t_rr, TO-220AC package	Lower t_rr but larger footprint and higher thermal mass; requires PCB heatsink	Preferred where ultra-fast recovery and thermal margin outweigh size constraints
ES3J	600 V, 3 A, 35 ns t_rr, DO-214AB (SMC) surface-mount	Surface-mount only; 35 ns t_rr enables >1 MHz operation but lower surge rating (100 A)	Best for high-density, high-frequency layouts where reflow compatibility is required

Compared with STTH3L06S and ES3J, the FR305G-K offers balanced performance in cost-sensitive, through-hole assembled 30–60 W power supplies - trading some speed for mechanical ruggedness, ease of hand-soldering, and proven reliability in legacy industrial designs.

Availability

FR305G-K is available at Aetrix Electronics and suitable for DC/DC converters, offline SMPS, motor drive snubbers, and industrial power supply designs requiring stable component supply and long-term manufacturability.

Supply support for FR305G-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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.

The FR30xG-K series is part of TSC's high-reliability fast recovery rectifier product line, engineered for robustness and consistency in power conversion systems operating under wide temperature and surge conditions.

FAQ

What is the maximum junction temperature rating for FR305G-K?

The FR305G-K has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C. This rating allows reliable operation in industrial environments with elevated ambient temperatures, provided thermal design maintains junction temperature within this limit using the specified R_θJA = 35 °C/W and appropriate PCB copper area or heatsinking.

Does FR305G-K meet RoHS and halogen-free requirements?

Yes, the FR305G-K is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound is UL 94V-0 rated, and the pure tin-plated leads meet J-STD-002 solderability standards - making FR305G-K suitable for environmentally regulated industrial and consumer products.

What is the reverse recovery time (t_rr) of FR305G-K and how is it measured?

The FR305G-K has a reverse recovery time (t_rr) of 250 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value reflects the time required for the diode to transition from forward conduction to reverse blocking, directly impacting switching loss and EMI in high-frequency power converters.

Can FR305G-K replace FR304G-K or FR306G-K in an existing design?

FR305G-K is not a direct replacement for FR304G-K (400 V) or FR306G-K (800 V), as its 600 V V_RRM falls between them. Substitution requires verification of peak reverse voltage stress in the circuit: use FR305G-K only where design margin permits 600 V rating, not where 400 V is insufficient or 800 V is mandated for safety.

What packaging options are available for FR305G-K?

The FR305G-K is supplied in DO-201AD package, available in two standard formats: 1,250 units per tape-and-reel (FR305G-K) and 500 units per ammo box (FR305G-K A0G). Both options feature axial leads, cathode band marking, and comply with JESD 201 Class 1A whisker testing.

FR305G-K Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 600 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 3 A

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

Reverse Recovery Time (trr):: 250 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 600 V

Capacitance @ Vr, F:: 30pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

FR305G-K FAQ

1.How can I place an order for FR305G-K through Aetrix?

Please submit a Request for Quotation (RFQ) for FR305G-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 FR305G-K reliable?

The price and inventory of FR305G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FR305G-K is usually 5 days.

3.What payment methods are accepted for FR305G-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FR305G-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FR305G-K?

FR305G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FR305G-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 FR305G-K?

For technical support, including FR305G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FR305G-K requirements.

6.How does Aetrix verify that FR305G-K is sourced from the original manufacturer or authorized distributors?

All FR305G-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 FR305G-K meets industry standards.

7.What is the process for return or replacement of FR305G-K?

All FR305G-K units undergo pre-shipment inspection (PSI). If there is an issue with FR305G-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 FR305G-K part is unused and in its original packaging.

Return procedure for FR305G-K:

1.Submit a request within 90 days.

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

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