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

Taiwan Semiconductor Corporation FR303G-K

Name: FR303G-K
Brand: Taiwan Semiconductor Corporation
SKU: FR303G-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FR303G-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: FR303G-K.pdf

Description:: 150NS, 3A, 200V, FAST RECOVERY R

Quantity:: RFQ Add To RFQ list

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Inventory:8,031

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Product details

Overview

FR303G-K from Taiwan Semiconductor is a 3A, 200V fast recovery rectifier diode in DO-201AD package, featuring 150 ns reverse recovery time, 1.3 V max forward voltage at 3 A, and 125 A surge capability - deployed in switching-mode DC/DC converters requiring efficient high-frequency rectification.

For engineers reviewing the FR303G-K datasheet, FR303G-K pinout, FR303G-K application, or FR303G-K equivalent, key selection criteria include V_RRM = 200 V, I_F = 3 A, t_rr = 150 ns, thermal resistance R_θJA = 35 °C/W, and DO-201AD mechanical compatibility with automated through-hole or surface-mount reflow assembly.

Technical Context

This single-die fast recovery rectifier uses optimized PN-junction design to achieve low conduction loss (V_F ≤ 1.3 V @ 3 A) and rapid carrier recombination (t_rr = 150 ns), enabling operation in 50–500 kHz SMPS topologies without excessive switching loss or EMI generation.

Rated for continuous junction temperature up to +150 °C and qualified per JESD201 Class 1A whisker testing, the FR303G-K supports high-reliability industrial power supplies where thermal cycling and long-term solder joint integrity are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - blocks up to 200 V repetitive reverse voltage, suitable for 24 V/48 V input DC/DC stages with 2× safety margin
I_F	3 A continuous - delivers rated output current without derating below 75 °C ambient in standard PCB layouts
t_rr	150 ns - enables stable operation in 200–300 kHz flyback and forward converters with minimal tail current loss
V_F (max)	1.3 V @ 3 A, 25 °C - contributes ≤3.9 W conduction loss at full load, reducing heatsink requirements
R_θJA	35 °C/W - allows ~40 °C rise above ambient at 3 A, supporting compact board-level thermal design
I_FSM	125 A @ 8.3 ms - withstands inrush surges from bulk capacitors or hot-plug events without failure

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; leads are pure tin plated, solderable per J-STD-002, UL 94V-0 molded compound, 1.20 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return)
Cathode	Current exit point during forward conduction; marked by band	Connected to output rail or filter capacitor positive; polarity must be observed to prevent reverse breakdown

Key Features

Feature	Design Value
Fast recovery (t_rr)	150 ns - reduces switching losses and improves efficiency in high-frequency SMPS designs
Low forward voltage	V_F ≤ 1.3 V @ 3 A - minimizes conduction loss and thermal stress under full-load conditions
High surge rating	I_FSM = 125 A - ensures robustness against line transients and startup surges
RoHS & halogen-free	Complies with IEC 61249-2-21 - meets environmental compliance for industrial and telecom end equipment

Applications

DC/DC Converter Output Rectification	AC/DC Adapter Secondary Side
Use Scenario: High-efficiency 24 V to 5 V/3.3 V isolated buck-derived converter in industrial PLC power modules. IC Role / Device Role / Timing Role: Fast recovery rectifier conducting during transformer secondary on-time; replaces slower general-purpose diodes to reduce switching loss. Use Value: 150 ns t_rr and 1.3 V V_F jointly improve full-load efficiency by ≥1.2% versus 1N5408, lowering thermal footprint.	Use Scenario: 12 V/2 A wall adapter for network routers with universal AC input (90–264 VAC). IC Role / Device Role / Timing Role: Secondary-side output rectifier in discontinuous conduction mode (DCM) flyback topology. Use Value: 200 V V_RRM provides sufficient margin over reflected 12 V output (≈170 V peak), avoiding avalanche stress during line surges.
Switching Inverter Auxiliary Supply	Motor Drive Bootstrap Circuit
Use Scenario: Auxiliary 15 V bias supply in 3-phase IGBT inverter gate driver stage. IC Role / Device Role / Timing Role: Fast-recovery rectifier feeding low-ESR capacitor bank that powers isolated gate drivers. Use Value: Low V_F and 125 A I_FSM ensure reliable start-up and transient immunity during repeated PWM bursts.	Use Scenario: Bootstrap diode in high-side N-channel MOSFET gate driver for BLDC motor control ICs. IC Role / Device Role / Timing Role: Charges bootstrap capacitor during low-side conduction; must recover before high-side turn-on. Use Value: 150 ns t_rr prevents cross-conduction risk in 20–50 kHz motor drive frequencies, ensuring clean gate voltage transitions.

DC/DC Converter Output Rectification

AC/DC Adapter Secondary Side

Use Scenario: High-efficiency 24 V to 5 V/3.3 V isolated buck-derived converter in industrial PLC power modules.

IC Role / Device Role / Timing Role: Fast recovery rectifier conducting during transformer secondary on-time; replaces slower general-purpose diodes to reduce switching loss.

Use Value: 150 ns t_rr and 1.3 V V_F jointly improve full-load efficiency by ≥1.2% versus 1N5408, lowering thermal footprint.

Use Scenario: 12 V/2 A wall adapter for network routers with universal AC input (90–264 VAC).

IC Role / Device Role / Timing Role: Secondary-side output rectifier in discontinuous conduction mode (DCM) flyback topology.

Use Value: 200 V V_RRM provides sufficient margin over reflected 12 V output (≈170 V peak), avoiding avalanche stress during line surges.

Switching Inverter Auxiliary Supply

Motor Drive Bootstrap Circuit

Use Scenario: Auxiliary 15 V bias supply in 3-phase IGBT inverter gate driver stage.

IC Role / Device Role / Timing Role: Fast-recovery rectifier feeding low-ESR capacitor bank that powers isolated gate drivers.

Use Value: Low V_F and 125 A I_FSM ensure reliable start-up and transient immunity during repeated PWM bursts.

Use Scenario: Bootstrap diode in high-side N-channel MOSFET gate driver for BLDC motor control ICs.

IC Role / Device Role / Timing Role: Charges bootstrap capacitor during low-side conduction; must recover before high-side turn-on.

Use Value: 150 ns t_rr prevents cross-conduction risk in 20–50 kHz motor drive frequencies, ensuring clean gate voltage transitions.

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	V_RRM = 600 V, t_rr = 65 ns, I_F = 3 A, SOD-123FL package	Higher voltage rating and faster recovery, but surface-mount only and lower surge rating (I_FSM = 75 A)	Prefer when board space is constrained and >200 V blocking is required; not drop-in compatible due to package and leadform
ON Semi MUR320	V_RRM = 200 V, t_rr = 75 ns, I_F = 3 A, DO-201AD package, V_F = 1.25 V max	Same package and voltage rating, but faster recovery and slightly lower V_F; RoHS compliant but not halogen-free	Direct replacement if tighter t_rr budget or lower conduction loss is prioritized; verify halogen-free requirement alignment

Compared with STTH3L06S and ON Semi MUR320, the FR303G-K offers balanced performance for cost-sensitive industrial DC/DC designs where 200 V blocking, 150 ns recovery, and through-hole assembly are primary constraints - neither alternative matches its combination of surge robustness (125 A), halogen-free compliance, and DO-201AD mechanical fit.

Availability

FR303G-K is available at Aetrix Electronics and suitable for DC/DC converters, switching inverters, and industrial auxiliary power supplies requiring stable component supply across multi-year production cycles.

Supply support for FR303G-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 industrial, computing, and consumer markets since 1979.

The FR30xG-K series is part of TSC's high-reliability fast recovery rectifier product line, engineered specifically for efficiency-critical switching power conversion in industrial-grade power supplies and motor control systems.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for FR303G-K?

The FR303G-K has a maximum repetitive peak reverse voltage (V_RRM) of 200 V, as specified in the Absolute Maximum Ratings table. This value is fixed for the FR303G-K variant and distinguishes it from other members of the FR301G-K to FR307G-K family, which range from 50 V to 1000 V. The 200 V rating ensures safe operation in 24–48 V system-derived DC/DC stages with appropriate derating.

Does FR303G-K support lead-free soldering processes?

Yes, FR303G-K features pure tin-plated leads and is qualified for lead-free soldering per J-STD-002. Its DO-201AD package uses UL 94V-0 compliant molding compound and passes JESD201 Class 1A whisker testing, making it suitable for both traditional SnPb and Pb-free reflow or wave soldering profiles used in industrial manufacturing.

What is the reverse recovery time (t_rr) of FR303G-K and how is it measured?

The FR303G-K has a reverse recovery time (t_rr) of 150 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A per the Electrical Specifications table. This parameter reflects the diode's ability to transition from conduction to blocking state and directly impacts switching loss in high-frequency converters - a key differentiator from general-purpose rectifiers like 1N5408.

Is FR303G-K halogen-free and RoHS compliant?

Yes, FR303G-K is both RoHS compliant and halogen-free in accordance with IEC 61249-2-21. This dual compliance is explicitly stated in the FEATURES section of the official Taiwan Semiconductor datasheet (Version C2105) and applies to the entire FR301G-K to FR307G-K family, including the FR303G-K variant.

Can FR303G-K be used in surface-mount applications?

The FR303G-K is packaged in DO-201AD, an axial-leaded through-hole package. While it can be mounted on surface-mount PCBs using "glue-and-reflow" or "wave-solder-over-SMT" hybrid processes, it is not a true SMD device like SOD-123FL or SMA. For dedicated surface-mount designs, alternatives such as STTH3L06S or MUR320 should be evaluated - FR303G-K itself requires through-hole placement or manual SMT adaptation.

FR303G-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):: 200 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):: 150 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 200 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

FR303G-K FAQ

1.How can I place an order for FR303G-K through Aetrix?

Please submit a Request for Quotation (RFQ) for FR303G-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 FR303G-K reliable?

The price and inventory of FR303G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FR303G-K is usually 5 days.

3.What payment methods are accepted for FR303G-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FR303G-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FR303G-K?

FR303G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FR303G-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 FR303G-K?

For technical support, including FR303G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FR303G-K requirements.

6.How does Aetrix verify that FR303G-K is sourced from the original manufacturer or authorized distributors?

All FR303G-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 FR303G-K meets industry standards.

7.What is the process for return or replacement of FR303G-K?

All FR303G-K units undergo pre-shipment inspection (PSI). If there is an issue with FR303G-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 FR303G-K part is unused and in its original packaging.

Return procedure for FR303G-K:

1.Submit a request within 90 days.

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

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