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

Taiwan Semiconductor Corporation FR154G

Name: FR154G
Brand: Taiwan Semiconductor Corporation
SKU: FR154G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FR154G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: FR154G.pdf

Description:: DIODE GEN PURP 400V 1.5A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:7,000

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Product details

Overview

FR154G from Taiwan Semiconductor is a fast recovery rectifier diode with 400 V repetitive peak reverse voltage (V_RRM), 1.5 A average forward current (I_F), and 150 ns reverse recovery time (t_rr) measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A - used in high-frequency switching power supplies and DC-DC converters.

For engineers reviewing the FR154G datasheet, FR154G pinout, FR154G application, or FR154G equivalent, key selection factors include its DO-204AC (DO-15) package, 50 A surge rating (I_FSM), 1.3 V max forward voltage at 1.5 A, 5 µA max reverse leakage at 25°C, and suitability for automotive-grade designs when AEC-Q101 qualified versions are selected.

Technical Context

The FR154G employs a glass-passivated silicon junction to achieve fast recovery performance while maintaining thermal stability up to 150°C junction temperature. Its single-die configuration and low junction capacitance (20 pF at 1 MHz, 4 V) support efficient operation in high-frequency switching topologies.

Designed for unidirectional conduction in bridge and flyback configurations, it delivers low power loss via 1.3 V max forward voltage and withstands repetitive 400 V reverse stress with only 5 µA leakage at room temperature - enabling reliable use in compact, thermally constrained power stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - maximum repetitive reverse blocking voltage before breakdown; defines usable input voltage range in AC-DC front-ends
I_F	1.5 A - continuous average forward current at 75°C ambient; sets steady-state power handling capability
t_rr	150 ns - reverse recovery time under specified test conditions; determines minimum switching frequency limit and switching loss
V_F (max)	1.3 V @ 1.5 A - forward voltage drop defining conduction loss and thermal dissipation in series paths
I_FSM	50 A - non-repetitive surge current rating (8.3 ms half-sine); supports inrush and fault transient tolerance
R_θJA	60 °C/W - junction-to-ambient thermal resistance in free-air; informs heatsinking requirements for sustained load

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, glass-passivated, cathode indicated by band. Weight ≈ 0.400 g. RoHS and halogen-free compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of rectification path; must handle full I_F and I_FSM currents
Cathode	Forward current exit / reverse blocking terminal	Marked with band; connected to higher-potential node; sustains full V_RRM during off-state

Key Features

Feature	Design Value
Fast recovery time	150 ns enables operation up to ~1 MHz switching frequencies with controlled turn-off loss
Glass-passivated junction	Enhances moisture resistance and long-term reliability in humid or industrial environments
Low forward voltage	1.3 V max at rated current reduces conduction loss and improves system efficiency
High surge capability	50 A I_FSM withstands startup surges and short-circuit transients without failure

Applications

Switch-Mode Power Supply (SMPS)	DC-DC Converter
Use Scenario: Secondary-side rectification in offline flyback or forward converters operating at 50–500 kHz. IC Role / Device Role / Timing Role: Unidirectional current steering device converting high-frequency AC to DC; replaces slower standard rectifiers to reduce switching loss. Use Value: 150 ns t_rr and 1.3 V V_F cut conduction + recovery losses by >25% vs. general-purpose diodes at 100 kHz.	Use Scenario: Isolated buck-derived topologies in telecom and server POL modules. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous isolated DC-DC stages requiring low-loss, high-reliability conduction. Use Value: 400 V V_RRM supports 28 V input systems with 150% derating; DO-15 package allows manual or automated through-hole assembly.
Automotive DC-DC Module	Industrial Motor Drive Auxiliary Supply
Use Scenario: 12 V/24 V battery-fed DC-DC conversion for infotainment or ADAS subsystems. IC Role / Device Role / Timing Role: Input rectifier in boost or buck-boost pre-regulator stages exposed to load dump transients. Use Value: 50 A I_FSM handles ISO 7637-2 pulse 5a/b surges; AEC-Q101 qualified variants available for qualification-critical designs.	Use Scenario: Auxiliary bias supply powering gate drivers and logic in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Bridge rectifier element in small-footprint auxiliary AC-DC stage feeding 15 V control rails. Use Value: DO-204AC mechanical robustness and 150°C T_J rating ensure stable operation near heat-generating IGBT modules.

Switch-Mode Power Supply (SMPS)

DC-DC Converter

Use Scenario: Secondary-side rectification in offline flyback or forward converters operating at 50–500 kHz.

IC Role / Device Role / Timing Role: Unidirectional current steering device converting high-frequency AC to DC; replaces slower standard rectifiers to reduce switching loss.

Use Value: 150 ns t_rr and 1.3 V V_F cut conduction + recovery losses by >25% vs. general-purpose diodes at 100 kHz.

Use Scenario: Isolated buck-derived topologies in telecom and server POL modules.

IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous isolated DC-DC stages requiring low-loss, high-reliability conduction.

Use Value: 400 V V_RRM supports 28 V input systems with 150% derating; DO-15 package allows manual or automated through-hole assembly.

Automotive DC-DC Module

Industrial Motor Drive Auxiliary Supply

Use Scenario: 12 V/24 V battery-fed DC-DC conversion for infotainment or ADAS subsystems.

IC Role / Device Role / Timing Role: Input rectifier in boost or buck-boost pre-regulator stages exposed to load dump transients.

Use Value: 50 A I_FSM handles ISO 7637-2 pulse 5a/b surges; AEC-Q101 qualified variants available for qualification-critical designs.

Use Scenario: Auxiliary bias supply powering gate drivers and logic in 3-phase inverter stacks.

IC Role / Device Role / Timing Role: Bridge rectifier element in small-footprint auxiliary AC-DC stage feeding 15 V control rails.

Use Value: DO-204AC mechanical robustness and 150°C T_J rating ensure stable operation near heat-generating IGBT modules.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1L06S	600 V V_RRM, 1.0 A I_F, 75 ns t_rr, SOD-123FL package	Higher voltage rating but lower current; surface-mount only	Select when board space is constrained and 600 V isolation margin is required over 400 V
ON Semi MUR160	600 V V_RRM, 1.0 A I_F, 60 ns t_rr, DO-41 package	Faster recovery but lower current rating and different thermal profile	Prefer for ultra-fast timing-critical snubber or clamp circuits where <100 ns t_rr is mandatory

Compared with STTH1L06S and MUR160, the FR154G offers higher average current (1.5 A vs. 1.0 A) and through-hole DO-15 mounting - making it better suited for cost-sensitive, medium-power industrial supplies where thermal mass and serviceability matter more than minimal t_rr.

Availability

FR154G is available at Aetrix Electronics and suitable for switch-mode power supplies, DC-DC converters, and automotive auxiliary power modules requiring stable component supply across production lifecycles.

Supply support for FR154G 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 automotive markets since 1979.

The FR151G–FR157G family was designed specifically for high-efficiency, high-reliability AC-DC and DC-DC power conversion - emphasizing fast recovery, low V_F, and rugged packaging for demanding thermal and surge environments.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for FR154G?

The FR154G has a V_RRM of 400 V, meaning it can reliably block up to 400 V of reverse polarity voltage in repetitive operation without breakdown. This rating is confirmed in the absolute maximum ratings table of the official Taiwan Semiconductor datasheet (Version I2105) and defines its safe operating range in rectifier applications such as 24 V or 48 V input SMPS front-ends where derating to 70–80% is typical. Exceeding this value risks avalanche failure.

What is the reverse recovery time (t_rr) specification for FR154G, and under what test conditions?

The FR154G has a reverse recovery time (t_rr) of 150 ns, measured under the specific conditions: forward current I_F = 0.5 A, reverse current I_R = 1.0 A, and reverse recovery current I_rr = 0.25 A. This value appears in the electrical specifications table of the Taiwan Semiconductor FR151G–FR157G datasheet (I2105). It reflects the diode's speed in transitioning from conduction to blocking state - critical for minimizing switching losses in high-frequency converters.

Is FR154G available in an AEC-Q101 qualified version?

Yes, the AEC-Q101 qualified version of FR154G is designated as FR154GH (with "H" suffix), per the ordering information section of the Taiwan Semiconductor datasheet. The base FR154G is not automatically qualified; only FR154GH meets the stress testing and reliability requirements for automotive under-hood and chassis applications. Both share identical electrical and thermal specs, but FR154GH undergoes additional qualification per AEC-Q101 Rev D.

What package type does FR154G use, and what are its key mechanical attributes?

FR154G uses the DO-204AC (also known as DO-15) axial-leaded package. Key mechanical attributes include glass passivation for junction protection, pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 rated molding compound, cathode polarity marked by a band, and approximate weight of 0.400 g. These features support manual assembly, wave soldering, and long-term reliability in industrial and automotive environments.

How does the forward voltage (V_F) of FR154G compare to standard recovery rectifiers?

The FR154G has a maximum forward voltage (V_F) of 1.3 V at 1.5 A and 25°C, which is significantly lower than standard recovery rectifiers (typically 1.6–2.0 V at same conditions). This reduction lowers conduction losses and improves thermal performance in continuous-duty applications like DC-DC output stages. The low V_F results from optimized silicon processing and is validated in the electrical specifications table of the FR154G datasheet.

FR154G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 1.5A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 1.5 A

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

Reverse Recovery Time (trr):: 150 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 400 V

Capacitance @ Vr, F:: 20pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

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

FR154G FAQ

1.How can I place an order for FR154G through Aetrix?

Please submit a Request for Quotation (RFQ) for FR154G 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 FR154G reliable?

The price and inventory of FR154G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FR154G is usually 5 days.

3.What payment methods are accepted for FR154G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FR154G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FR154G?

FR154G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FR154G 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 FR154G?

For technical support, including FR154G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FR154G requirements.

6.How does Aetrix verify that FR154G is sourced from the original manufacturer or authorized distributors?

All FR154G 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 FR154G meets industry standards.

7.What is the process for return or replacement of FR154G?

All FR154G units undergo pre-shipment inspection (PSI). If there is an issue with FR154G, 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 FR154G part is unused and in its original packaging.

Return procedure for FR154G:

1.Submit a request within 90 days.

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

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