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Taiwan Semiconductor Corporation FR151G-T
- Part No.:
- FR151G-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
FR151G-T.pdf
- Description:
- 150NS, 1.5A, 50V, FAST RECOVERY
- Quantity:
- Payment:
- Shipping:
Inventory:5,785
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Product details
Overview
FR151G-T from Taiwan Semiconductor is a 1.5A, 50V fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 150 ns reverse recovery time, 1.3 V max forward voltage at 1.5 A, and 50 A surge current capability - used in DC-DC converters and switching-mode power supplies.
For engineers reviewing the FR151G-T datasheet, FR151G-T pinout, FR151G-T application, or FR151G-T equivalent, key selection criteria include repetitive peak reverse voltage (50 V), thermal resistance (60 °C/W), junction temperature range (–55 to +150 °C), cathode-band polarity marking, and RoHS/halogen-free compliance for industrial power conversion designs.
Technical Context
The FR151G-T is a single-die, glass-passivated silicon PN junction rectifier optimized for high-efficiency switching applications. Its 150 ns trr and low VF (≤1.3 V @ 1.5 A) minimize conduction and switching losses in high-frequency SMPS topologies.
It operates across –55 °C to +150 °C junction temperature, with 60 °C/W junction-to-ambient thermal resistance and 5 µA max reverse leakage at 25 °C - enabling reliable performance in compact, thermally constrained power stages without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse voltage the device blocks reliably in circuit operation |
| IF(AV) | 1.5 A - average forward current rating defining continuous DC output capability |
| trr | 150 ns - reverse recovery time directly limiting usable switching frequency in flyback/forward converters |
| VF(max) | 1.3 V @ 1.5 A - forward voltage drop determining conduction loss and thermal load at rated current |
| IFSM | 50 A - non-repetitive surge current handling capacity during startup or fault transients |
| RθJA | 60 °C/W - thermal resistance from junction to ambient, setting heatsink requirements for natural convection |
| IR(max) | 5 µA @ 25 °C - reverse leakage current affecting standby power and high-impedance bias networks |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, glass-passivated, RoHS/halogen-free molded case with cathode band polarity indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry node | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current exit node | Marked by band; connects to output capacitor positive rail or filter inductor input |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances moisture resistance and long-term reliability under humid or thermally cycling conditions |
| Low VF (≤1.3 V) | Reduces conduction loss by ~15% vs. standard recovery diodes at 1.5 A, improving efficiency in 12–24 V outputs |
| 150 ns trr | Enables stable operation up to 100 kHz switching in flyback converters without excessive ringing or EMI |
| 50 A IFSM | Withstands inrush currents during cold-start of 24 V/36 V industrial power modules without degradation |
| UL 94V-0 molding | Meets flame-retardancy requirements for enclosed power supplies in Class 2 and ITE applications |
Applications
| DC-DC Converter Output Stage | Switching Mode Inverter DC Link |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V/24 V offline flyback converters for industrial sensors. IC Role / Device Role / Timing Role: Fast recovery rectifier converting high-frequency AC from transformer secondary to regulated DC output. Use Value: 150 ns trr minimizes switching loss and voltage overshoot, enabling >88% efficiency at full load without snubber circuits. | Use Scenario: Freewheeling path in half-bridge inverter driving 48 V BLDC motor control boards. IC Role / Device Role / Timing Role: Unidirectional current path during dead-time intervals to clamp inductive kickback. Use Value: 50 V VRRM and 50 A IFSM safely handle 40 V bus transients and motor stall surges without avalanche stress. |
| AC-DC Adapter Secondary | Industrial PLC Power Supply Input |
Use Scenario: Output rectification in compact 5 V/2 A wall adapters for IoT gateways. IC Role / Device Role / Timing Role: Main power rectifier delivering low-noise DC after transformer isolation. Use Value: 1.3 V VF and 5 µA IR ensure low no-load consumption (<150 mW) and minimal thermal rise in sealed enclosures. | Use Scenario: Input stage rectification in DIN-rail mounted 24 V/5 A PLC power modules. IC Role / Device Role / Timing Role: Primary rectifier converting bridge-output AC to bulk DC before regulation. Use Value: DO-15 package allows automated insertion and reflow compatibility; 150 °C TJ max supports operation in 70 °C ambient control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06U | 600 V VRRM, 1 A IF, 75 ns trr, SOD-123FL package | Higher voltage rating but lower current; surface-mount only | Preferred where board space is critical and 600 V blocking is required, not for 50 V replacement |
| 1N4933GP | 100 V VRRM, 1.5 A IF, 200 ns trr, DO-15 package, 1.2 V VF | Slightly higher VRRM and slower recovery; same axial package and pinout | Drop-in alternative if 100 V margin is acceptable and 200 ns trr fits system timing budget |
Compared with STTH1L06U and 1N4933GP, the FR151G-T offers optimal balance of 50 V rating, 1.5 A current, 150 ns speed, and through-hole DO-15 fit - making it ideal for cost-sensitive, medium-frequency industrial power supplies where leaded assembly and thermal robustness are prioritized.
Availability
FR151G-T is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and general-purpose power rectification requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for FR151G-T 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, specializing in power rectifiers, TVS diodes, MOSFETs, and LED drivers since 1979.
The FR15xG-T series was designed specifically for high-reliability, cost-optimized switching power supplies in industrial, telecom, and consumer electronics - emphasizing fast recovery, low VF, and robust thermal performance in standard axial packages.
FAQ
What is the maximum junction temperature rating for FR151G-T?
The FR151G-T has a maximum junction temperature (TJ) rating of +150 °C, with an operating range from –55 °C to +150 °C. This allows the FR151G-T to function reliably in enclosed industrial power supplies where ambient temperatures reach 70 °C and self-heating adds up to 80 °C under full load, provided thermal resistance to ambient remains ≤60 °C/W.
Does FR151G-T have a specified reverse recovery time, and how is it measured?
Yes, the FR151G-T has a specified reverse recovery time (trr) of 150 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC test conditions. This value is confirmed in the official Taiwan Semiconductor datasheet Version B2105 and applies exclusively to FR151G-T - later variants (e.g., FR155G-T) specify longer trr values.
Is FR151G-T RoHS and halogen-free compliant?
Yes, the FR151G-T is RoHS compliant and halogen-free according to IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and the pure tin-plated leads are solderable per J-STD-002. These specifications are explicitly stated in the Taiwan Semiconductor product documentation for FR151G-T.
What does the "G" suffix in FR151G-T signify?
The "G" in FR151G-T indicates green (halogen-free) compound packaging, as defined in Taiwan Semiconductor's ordering nomenclature. It is part of the standardized marking code "FR151G", distinct from non-G variants, and confirms compliance with environmental standards without altering electrical parameters.
Can FR151G-T be used as a direct replacement for 1N4001 in switching power supplies?
No - while both are DO-15 rectifiers, the FR151G-T is a fast recovery diode (150 ns trr), whereas the 1N4001 is a general-purpose rectifier (~30 µs trr). Using FR151G-T in place of 1N4001 improves efficiency and reduces EMI in switching supplies, but the FR151G-T must be verified for voltage/current derating and layout parasitics specific to the target design.
FR151G-T 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):
- 50 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 @ 50 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
FR151G-T FAQ
1.How can I place an order for FR151G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for FR151G-T 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 FR151G-T reliable?
The price and inventory of FR151G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FR151G-T is usually 5 days.
3.What payment methods are accepted for FR151G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FR151G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FR151G-T?
FR151G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FR151G-T 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 FR151G-T?
For technical support, including FR151G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FR151G-T requirements.
6.How does Aetrix verify that FR151G-T is sourced from the original manufacturer or authorized distributors?
All FR151G-T 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 FR151G-T meets industry standards.
7.What is the process for return or replacement of FR151G-T?
All FR151G-T units undergo pre-shipment inspection (PSI). If there is an issue with FR151G-T, 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 FR151G-T part is unused and in its original packaging.
Return procedure for FR151G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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