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

Taiwan Semiconductor Corporation FR305G

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

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Part No.:: FR305G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: FR305G.pdf

Description:: DIODE GEN PURP 600V 3A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:3,720

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Product details

Overview

FR305G from Taiwan Semiconductor is a 3A, 600V fast recovery rectifier diode in DO-201AD package, featuring 250ns reverse recovery time, 1.3V max forward voltage at 3A, and 125A surge capability-used in DC-DC converters and switching inverters for high-efficiency power conversion.

For engineers reviewing the FR305G datasheet, FR305G pinout, FR305G application, or FR305G equivalent, key selection factors include its 600V repetitive peak reverse voltage, thermal resistance of 35°C/W, AEC-Q101 qualification option (FR305GH), junction temperature range (–55°C to +150°C), and RoHS/halogen-free compliance.

Technical Context

The FR305G employs a single-die silicon PN junction structure optimized for fast recovery in high-frequency switching applications. Its 250ns trr enables reduced switching losses in SMPS operating up to several hundred kHz, while the 35°C/W R_θJA supports conduction-limited thermal design at 3A continuous current.

It operates across –55°C to +150°C junction temperature with 5µA max reverse leakage at 25°C and 100µA at 125°C, and exhibits 30pF junction capacitance at 4V reverse bias-critical for EMI control and snubberless layout in compact converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - maximum repetitive reverse blocking voltage; defines safe operating limit in 400–500V DC bus applications
I_F	3 A - average forward current rating; determines heatsink sizing and PCB copper area for continuous conduction
t_rr	250 ns - reverse recovery time; directly impacts switching loss and EMI in 100–300 kHz SMPS designs
V_F (max)	1.3 V @ 3A, 25°C - forward voltage drop; sets conduction loss baseline (3.9W max at full load)
I_FSM	125 A - non-repetitive surge current (8.3ms half-sine); withstands inrush and fault transients without failure
R_θJA	35 °C/W - junction-to-ambient thermal resistance; used to calculate temperature rise under natural convection
Junction temp	–55°C to +150°C - operational range enabling use in automotive under-hood and industrial ambient environments

Pinout & Package

Package: DO-201AD molded plastic case with pure tin-plated leads (J-STD-002 solderable), UL 94V-0 rated, cathode indicated by band, weight ≈1.20g.

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

Key Features

Feature	Design Value
Fast recovery (250ns)	Reduces switching loss and diode-induced ringing in high-frequency DC-DC stages
Low V_F (1.3V max)	Minimizes conduction loss at 3A, improving efficiency in 12–48V output converters
AEC-Q101 qualified variant	FR305GH meets automotive stress test requirements for under-hood power modules
RoHS & halogen-free	Complies with IEC 61249-2-21; suitable for consumer, industrial, and green-certified systems
125A surge rating	Survives cold-start inrush and short-circuit events without parametric shift or bond-wire failure

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24V at ≤3A. IC Role / Device Role / Timing Role: Fast recovery rectifier handling high-frequency AC-to-DC conversion with minimal reverse recovery loss. Use Value: 250ns t_rr and 1.3V V_F reduce total power loss by ~15% vs. standard recovery diodes at 200kHz operation.	Use Scenario: Output stage rectification in 1–3kW solar microinverters or UPS inverters. IC Role / Device Role / Timing Role: Unidirectional current path in H-bridge or full-wave rectifier configuration with 600V blocking margin. Use Value: 600V V_RRM provides 2× safety margin over 300VAC RMS input, supporting universal line operation.
Automotive Power Supply	Industrial SMPS
Use Scenario: 12V/24V auxiliary power supply in engine control units and ADAS domain controllers. IC Role / Device Role / Timing Role: Input rectifier in buck-derived offline supplies subjected to load dump and cold-crank transients. Use Value: AEC-Q101-qualified FR305GH variant ensures reliability at –40°C to +125°C ambient with 125A surge tolerance.	Use Scenario: Primary-side clamp or secondary-side freewheeling in factory automation PSUs. IC Role / Device Role / Timing Role: Freewheeling path for inductive loads and energy recycling in synchronous rectifier-assisted topologies. Use Value: 35°C/W R_θJA enables direct PCB mounting without heatsink in 25°C ambient, reducing BOM count.

DC-DC Converter

Switching Inverter

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24V at ≤3A.

IC Role / Device Role / Timing Role: Fast recovery rectifier handling high-frequency AC-to-DC conversion with minimal reverse recovery loss.

Use Value: 250ns t_rr and 1.3V V_F reduce total power loss by ~15% vs. standard recovery diodes at 200kHz operation.

Use Scenario: Output stage rectification in 1–3kW solar microinverters or UPS inverters.

IC Role / Device Role / Timing Role: Unidirectional current path in H-bridge or full-wave rectifier configuration with 600V blocking margin.

Use Value: 600V V_RRM provides 2× safety margin over 300VAC RMS input, supporting universal line operation.

Automotive Power Supply

Industrial SMPS

Use Scenario: 12V/24V auxiliary power supply in engine control units and ADAS domain controllers.

IC Role / Device Role / Timing Role: Input rectifier in buck-derived offline supplies subjected to load dump and cold-crank transients.

Use Value: AEC-Q101-qualified FR305GH variant ensures reliability at –40°C to +125°C ambient with 125A surge tolerance.

Use Scenario: Primary-side clamp or secondary-side freewheeling in factory automation PSUs.

IC Role / Device Role / Timing Role: Freewheeling path for inductive loads and energy recycling in synchronous rectifier-assisted topologies.

Use Value: 35°C/W R_θJA enables direct PCB mounting without heatsink in 25°C ambient, reducing BOM count.

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 (STMicroelectronics)	Same 3A/600V rating; 75ns t_rr, 1.7V V_F max; TO-220AC package	Lower trr but higher V_F; requires heatsink due to TO-220 thermal resistance	Prefer when ultra-fast recovery dominates over conduction loss; not drop-in due to package and pinout mismatch
ES3D (Vishay)	3A/200V rating; 35ns t_rr, 0.95V V_F max; DO-214AB package	Lower voltage rating limits to <200V applications; smaller footprint but lower surge margin	Select only for low-voltage, space-constrained designs where 600V blocking is unnecessary

Compared with STTH3L06S and ES3D, the FR305G offers balanced trade-offs: moderate 250ns t_rr, low 1.3V V_F, DO-201AD compatibility with legacy layouts, and AEC-Q101 availability-making it optimal for cost-sensitive, thermally constrained 600V industrial and automotive power supplies.

Availability

FR305G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and automotive power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for FR305G 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, automotive, and consumer markets since 1979.

The FR301G–FR307G series is part of TSC's high-reliability fast recovery rectifier product line, engineered for robust performance in switching-mode power supplies where efficiency, surge resilience, and thermal stability are critical.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the FR305G?

The FR305G has a V_RRM of 600 V, meaning it can reliably block up to 600 volts in reverse bias without breakdown. This rating is confirmed in the Absolute Maximum Ratings table on page 2 of the H2105 datasheet and defines its suitability for 400–500V DC bus or 300VAC line-derived applications. The FR305G must not be operated beyond this voltage under any condition, including transient spikes.

Does the FR305G have AEC-Q101 qualification?

The base FR305G is not AEC-Q101 qualified, but the FR305GH variant-identical electrically and mechanically-is fully AEC-Q101 qualified per the Ordering Information table. The "H" suffix denotes automotive-grade screening, including temperature cycling, humidity testing, and mechanical shock validation. For automotive applications, specify FR305GH to ensure compliance.

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

The FR305G has a typical reverse recovery time of 250 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, as specified in the Electrical Specifications table. This value reflects the time required for minority carriers to recombine after forward conduction ceases, directly impacting switching loss and EMI in high-frequency converters.

Can the FR305G replace the FR304G or FR306G in an existing design?

The FR305G is not a direct replacement for FR304G (400V) or FR306G (800V) due to its specific 600V V_RRM rating. Substitution requires verifying that the circuit's peak reverse voltage remains within 600V for FR305G, or does not exceed 400V/800V for the respective alternatives. Thermal and surge margins must also be re-evaluated, as t_rr and V_F differ across the FR30xG family.

What is the thermal resistance (R_θJA) of the FR305G and how does it affect PCB layout?

The FR305G has a junction-to-ambient thermal resistance of 35°C/W under standard JEDEC test conditions. This means a 3A load at 1.3V V_F generates ~3.9W of heat, resulting in a ~137°C junction rise above ambient-requiring adequate copper pour (≥1 in² 2oz Cu), minimal trace length, and avoidance of nearby heat sources. Layout must prioritize thermal relief on both terminals.

FR305G 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 FAQ

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

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

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

3.What payment methods are accepted for FR305G?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FR305G?

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

Once your FR305G 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?

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

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

All FR305G 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 meets industry standards.

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

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

Return procedure for FR305G:

1.Submit a request within 90 days.

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

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