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

Taiwan Semiconductor Corporation FR103G-K

Name: FR103G-K
Brand: Taiwan Semiconductor Corporation
SKU: FR103G-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FR103G-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: FR103G-K.pdf

Description:: 150NS, 1A, 200V, FAST RECOVERY R

Quantity:: RFQ Add To RFQ list

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Inventory:8,924

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Product details

Overview

FR103G-K from Taiwan Semiconductor is a 1A, 200V fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 150 ns reverse recovery time, 1.3 V forward voltage at 1 A, and 30 A surge current capability. It serves as a primary output rectifier in low-to-medium voltage DC-DC converters.

For engineers reviewing the FR103G-K datasheet, FR103G-K pinout, FR103G-K application, or FR103G-K equivalent, key selection criteria include V_RRM = 200 V, t_rr = 150 ns, I_F = 1 A, thermal resistance R_θJA = 70 °C/W, and DO-41 mechanical compatibility with through-hole PCB layouts.

Technical Context

This single-die, glass-passivated fast recovery rectifier operates with junction temperature range –55 °C to +150 °C and supports repetitive peak reverse voltages up to 200 V. Its low 1.3 V forward voltage at 1 A and 10 pF junction capacitance enable high-efficiency switching in 20–100 kHz power stages.

The device exhibits 5 µA max reverse leakage at 25 °C and 100 µA at 125 °C under rated V_R, and delivers 30 A non-repetitive surge current (8.3 ms half-sine), making it suitable for transient-heavy input rectification and flyback secondary-side rectification.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage; defines usable input/output voltage headroom in 24–48 V systems
t_rr	150 ns - Fast recovery enables efficient operation in 20–100 kHz SMPS without excessive switching loss or ringing
V_F	1.3 V @ 1 A - Low conduction loss reduces heat generation in continuous 1 A output paths
I_FSM	30 A - Withstands short-duration inrush and fault currents common in AC-DC front ends and DC-DC startup
R_θJA	70 °C/W - Enables natural-convection thermal design in compact DO-41 mounted layouts without heatsinking
C_J	10 pF @ 4 V - Minimizes capacitive coupling and EMI in high-dv/dt switching nodes

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 1A whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Forward current entry point	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node return)
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to output rail or filter capacitor positive; polarity must be observed to prevent breakdown

Key Features

Feature	Design Value
Glass passivated junction	Enhances moisture and contamination resistance, improving long-term reliability in humid or industrial environments
Low V_F (1.3 V)	Reduces conduction loss by ~15% vs. standard 1N400x series, directly lowering thermal stress in 1 A continuous designs
150 ns t_rr	Enables use in higher-frequency topologies than general-purpose rectifiers, reducing output filter size and cost
RoHS & halogen-free	Complies with IEC 61249-2-21 and global environmental directives for industrial and consumer end equipment

Applications

DC-DC Converter Output Rectification	Switch-Mode Power Supply Secondary Side
Use Scenario: 12 V/1 A isolated flyback converter powering embedded control logic. IC Role / Device Role / Timing Role: Primary unidirectional current path converting transformer AC output to regulated DC; handles continuous 1 A load with minimal conduction loss. Use Value: 1.3 V V_F limits power dissipation to 1.3 W, enabling compact layout without forced air cooling.	Use Scenario: 24 V/1 A forward converter supplying PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side freewheeling and rectification element synchronized with main switch duty cycle. Use Value: 150 ns t_rr suppresses reverse recovery spikes, reducing EMI filtering requirements and snubber losses.
AC-DC Adapter Input Bridge Leg	Industrial Sensor Power Supply
Use Scenario: 100–240 VAC input, 5 V/1 A adapter using voltage-doubler or full-wave bridge configuration. IC Role / Device Role / Timing Role: One leg of discrete bridge rectifier handling 50/60 Hz line frequency and transient surges. Use Value: 30 A I_FSM withstands cold-start inrush without degradation, extending product lifetime.	Use Scenario: 2-wire loop-powered 4–20 mA sensor with integrated 3.3 V LDO requiring clean, low-noise DC input. IC Role / Device Role / Timing Role: Input-stage rectifier feeding bulk capacitor and linear regulator; operates in low-duty-cycle, low-heat mode. Use Value: 5 µA max I_R at 25 °C minimizes standby leakage, preserving accuracy in precision analog signal chains.

DC-DC Converter Output Rectification

Switch-Mode Power Supply Secondary Side

Use Scenario: 12 V/1 A isolated flyback converter powering embedded control logic.

IC Role / Device Role / Timing Role: Primary unidirectional current path converting transformer AC output to regulated DC; handles continuous 1 A load with minimal conduction loss.

Use Value: 1.3 V V_F limits power dissipation to 1.3 W, enabling compact layout without forced air cooling.

Use Scenario: 24 V/1 A forward converter supplying PLC I/O modules.

IC Role / Device Role / Timing Role: Secondary-side freewheeling and rectification element synchronized with main switch duty cycle.

Use Value: 150 ns t_rr suppresses reverse recovery spikes, reducing EMI filtering requirements and snubber losses.

AC-DC Adapter Input Bridge Leg

Industrial Sensor Power Supply

Use Scenario: 100–240 VAC input, 5 V/1 A adapter using voltage-doubler or full-wave bridge configuration.

IC Role / Device Role / Timing Role: One leg of discrete bridge rectifier handling 50/60 Hz line frequency and transient surges.

Use Value: 30 A I_FSM withstands cold-start inrush without degradation, extending product lifetime.

Use Scenario: 2-wire loop-powered 4–20 mA sensor with integrated 3.3 V LDO requiring clean, low-noise DC input.

IC Role / Device Role / Timing Role: Input-stage rectifier feeding bulk capacitor and linear regulator; operates in low-duty-cycle, low-heat mode.

Use Value: 5 µA max I_R at 25 °C minimizes standby leakage, preserving accuracy in precision analog signal chains.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R02U	V_RRM = 200 V, t_rr = 100 ns, V_F = 1.15 V @ 1 A, DO-41 package	Lower V_F and faster t_rr improve efficiency in >50 kHz designs but require tighter layout for EMI control	Preferred where peak efficiency >92% is critical and board space allows optimized routing
1N4934G	V_RRM = 200 V, t_rr = 200 ns, V_F = 1.4 V @ 1 A, DO-41 package	Slower recovery and higher V_F increase conduction and switching loss; wider availability in legacy inventory	Suitable for cost-sensitive, lower-frequency (<30 kHz) applications where thermal margin is ample

Compared with STTH1R02U and 1N4934G, FR103G-K offers balanced performance: its 150 ns t_rr and 1.3 V V_F deliver optimal trade-off between efficiency and EMI in mid-frequency SMPS, while maintaining broad DO-41 footprint compatibility and robust surge tolerance.

Availability

FR103G-K is available at Aetrix Electronics and suitable for DC-DC converters, switching mode power supplies, and industrial sensor power supplies requiring stable component supply across multi-year production cycles.

Supply support for FR103G-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 FR10xG-K series is designed specifically for cost-effective, high-reliability rectification in mainstream off-line and isolated DC-DC power conversion, emphasizing thermal robustness, surge resilience, and RoHS/halogen-free compliance.

FAQ

What is the maximum junction temperature rating for FR103G-K?

The FR103G-K has a maximum junction temperature (T_J) of +150 °C and a minimum of –55 °C. This wide operating range allows reliable deployment in industrial environments with ambient temperatures up to +85 °C when derated per the forward current derating curve. The FR103G-K maintains specified electrical performance within this full range, provided thermal design respects R_θJA = 70 °C/W.

Does FR103G-K support lead-free soldering processes?

Yes, FR103G-K features pure tin-plated leads compliant with J-STD-002 for solderability and qualified for lead-free reflow profiles. Its molding compound meets UL 94V-0 flammability rating, and the device is RoHS-compliant and halogen-free per IEC 61249-2-21. No special pre-bake or process adjustments are required for standard Pb-free assembly.

How does the reverse recovery time of FR103G-K compare to standard rectifiers like 1N4007?

FR103G-K has a reverse recovery time (t_rr) of 150 ns, whereas the 1N4007 exhibits t_rr > 2000 ns. This ~13× faster recovery significantly reduces switching losses and voltage overshoot in circuits operating above 20 kHz. In practical terms, replacing 1N4007 with FR103G-K in a 60 kHz flyback converter lowers diode dissipation by ~70% and eases EMI filter design.

What is the marking code printed on the FR103G-K body?

The FR103G-K is marked "FR103G" on the device body, followed by a green compound indicator (G), date code (YWW), and factory code (F). The cathode is identified by a distinct band adjacent to the marking. This marking aligns with Taiwan Semiconductor's DO-41 packaging standard and enables visual verification during manual assembly and post-solder inspection.

Can FR103G-K be used in place of FR102G-K or FR104G-K in existing designs?

FR103G-K is not a direct replacement for FR102G-K (100 V) or FR104G-K (400 V) due to its specific 200 V V_RRM rating. Substitution requires verifying that peak reverse voltage in the circuit remains ≤200 V with margin. While all share identical DO-41 package, thermal, and surge specs, V_RRM mismatch risks premature failure if overstressed - always validate against worst-case transient conditions before interchange.

FR103G-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:: 1.3 V @ 1 A

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

Reverse Recovery Time (trr):: 150 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

FR103G-K FAQ

1.How can I place an order for FR103G-K through Aetrix?

Please submit a Request for Quotation (RFQ) for FR103G-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 FR103G-K reliable?

The price and inventory of FR103G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FR103G-K is usually 5 days.

3.What payment methods are accepted for FR103G-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FR103G-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FR103G-K?

FR103G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FR103G-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 FR103G-K?

For technical support, including FR103G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FR103G-K requirements.

6.How does Aetrix verify that FR103G-K is sourced from the original manufacturer or authorized distributors?

All FR103G-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 FR103G-K meets industry standards.

7.What is the process for return or replacement of FR103G-K?

All FR103G-K units undergo pre-shipment inspection (PSI). If there is an issue with FR103G-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 FR103G-K part is unused and in its original packaging.

Return procedure for FR103G-K:

1.Submit a request within 90 days.

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

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