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Diodes Incorporated FR301-T
- Part No.:
- FR301-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
FR301-T.pdf
- Description:
- DIODE GEN PURP 50V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:5,618
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Product details
Overview
FR301-T from Diodes Incorporated is a 3.0A fast recovery rectifier diode in DO-201AD package, rated for 50V maximum recurrent peak reverse voltage (VRRM), 1.3V forward voltage drop at 3.0A DC, and 150ns reverse recovery time (Trr), used in AC/DC input stage rectification of offline switch-mode power supplies.
For engineers reviewing the FR301-T datasheet, FR301-T pinout, FR301-T application, or FR301-T equivalent, key selection criteria include VRRM margin vs. line surge, Trr impact on EMI in high-frequency converters, VF trade-off against conduction loss, and DO-201AD thermal derating above 75°C ambient.
Technical Context
This axial-leaded fast recovery rectifier operates with low stored charge (Qrr implied by Trr = 150ns under IF = 0.5A / IR = 1.0A test conditions) and exhibits 10µA max DC reverse leakage at rated VRRM, enabling efficient operation in 50–100kHz flyback and forward converter primary-side rectification.
Its 70pF typical junction capacitance at 4V reverse bias and -65°C to +175°C operating range support stable performance in thermally demanding industrial power adapters and LED driver front-ends where rapid voltage reversal occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; sets minimum safety margin above peak AC line (e.g., 35V RMS → 49.5V peak). |
| I(AV) | 3.0 A @ TA = 75°C - Average forward current rating; requires heatsinking or airflow above 75°C ambient. |
| VF | 1.3 V @ 3.0A DC - Forward conduction loss contributor; yields ~3.9W dissipation at full load. |
| Trr | 150 ns - Fast recovery enables reduced switching losses and lower EMI in SMPS operating >20kHz. |
| IR | 10 µA @ VRRM - Low leakage preserves efficiency in high-impedance hold-up circuits. |
| CJ | 70 pF @ 4V - Junction capacitance affects snubber design and high-frequency noise coupling. |
Pinout & Package
DO-201AD molded plastic package with axial leads; cathode indicated by color band; UL 94V-0 rated; weight ≈1.1 g; mountable in any orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC source or transformer secondary winding; must withstand surge currents up to 150A. |
| Cathode | Forward current exit point | Connected to bulk capacitor or output rail; polarity marked by color band per JEDEC standard. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 150 ns - Reduces reverse recovery loss and associated ringing in high-frequency SMPS. |
| Low forward voltage | 1.3 V @ 3.0A - Minimizes conduction loss in cost-sensitive 5–24V output power supplies. |
| High surge capability | 150 A IFSM - Withstands inrush and transient overloads without failure. |
| Wide temperature range | -65°C to +175°C - Supports operation in automotive under-hood and industrial motor drive environments. |
Applications
| AC/DC Power Adapter Input Stage | LED Driver Primary Rectification |
|---|---|
Use Scenario: 120/230VAC-to-DC conversion in compact wall adapters with <15W output. IC Role / Device Role / Timing Role: Fast recovery rectifier in single-phase bridge or half-wave configuration. Use Value: 150ns Trr limits switching node oscillation, easing EMI filter design and reducing snubber losses. | Use Scenario: Off-line LED drivers powering streetlights or commercial fixtures. IC Role / Device Role / Timing Role: Input rectifier handling 50/60Hz line frequency with occasional surge events. Use Value: 150A IFSM rating ensures robustness against lightning-induced surges on AC mains input. |
| Industrial Control Power Supply | UPS Battery Charger Front-End |
Use Scenario: 24V/48V system power supplies in PLCs and I/O modules. IC Role / Device Role / Timing Role: Secondary-side rectifier in isolated flyback topology. Use Value: 1.3V VF reduces heat generation in sealed enclosures with limited airflow. | Use Scenario: Mains-connected battery charger in standby UPS systems. IC Role / Device Role / Timing Role: Bulk rectifier feeding charging controller and isolation stage. Use Value: -65°C to +175°C TJ range supports reliable operation during extended float-charge cycles at elevated temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PR3001G | VRRM = 50V, Trr = 125ns, VF = 1.25V @ 3A - improved speed and lower VF. | Same DO-201AD package; optimized for higher-efficiency 65–100kHz designs. | Select PR3001G when upgrading legacy FR301-T designs for lower EMI and thermal footprint. |
| STTH3L06 | VRRM = 60V, Trr = 75ns, VF = 1.2V @ 3A - faster, higher voltage rating, same current. | TO-220AC package; requires PCB mounting change and heatsink integration. | Choose STTH3L06 only if board redesign allows TO-220 footprint and higher VRRM margin is required. |
Compared with PR3001G and STTH3L06, FR301-T offers proven reliability in cost-sensitive DO-201AD layouts but trades off 25–75ns in Trr and ~0.05–0.1V in VF-acceptable where EMI filtering budget permits and thermal constraints are moderate.
Availability
FR301-T is available at Aetrix Electronics and suitable for AC/DC power adapters, LED driver front-ends, and industrial control power supplies requiring stable component supply across multi-year production cycles.
Supply support for FR301-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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The FR301-T belongs to the FR30x fast recovery rectifier product line, engineered for high-efficiency, high-reliability AC input rectification in cost-constrained power conversion systems.
FAQ
What is the maximum allowable case temperature for continuous operation of FR301-T?
The FR301-T has no specified maximum case temperature; its thermal limit is defined by junction temperature. With 3.0A average forward current at TA = 75°C and DO-201AD package, junction temperature remains within -65°C to +175°C range provided lead length is ≥9.5mm and ambient does not exceed 75°C. Derating curves in DS26003 confirm safe operation down to 1.0A at 125°C ambient.
Can FR301-T replace a standard PN junction rectifier like 1N4001 in a 5V/2A power supply?
Yes, FR301-T can replace 1N4001 in most 5V/2A linear or low-frequency SMPS designs due to identical DO-201AD package and higher current rating (3.0A vs. 1.0A). However, its faster 150ns recovery offers no benefit below 1kHz, and its slightly higher VF (1.3V vs. ~1.1V for 1N4001 at 1A) may increase conduction loss in low-voltage outputs.
Is FR301-T suitable for use in a PFC boost diode position?
No. FR301-T is not recommended for active PFC boost diode applications due to insufficient Trr performance (150ns) and lack of soft recovery characteristics. PFC stages require ultrafast or ultra-soft recovery diodes (e.g., UFT series) with Trr < 50ns and controlled Qrr to minimize switching loss and EMI during high-frequency (≥65kHz) operation.
Does FR301-T have AEC-Q101 qualification for automotive use?
No. FR301-T is not AEC-Q101 qualified. While its -65°C to +175°C operating temperature range meets automotive under-hood thermal requirements, it lacks the stress testing, failure analysis, and traceability documentation mandated by AEC-Q101. For automotive applications, Diodes Incorporated recommends the AEC-Q101 qualified PR3001G or SB350 variants.
FR301-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 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:
- 10 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 175°C
FR301-T FAQ
1.How can I place an order for FR301-T through Aetrix?
Please submit a Request for Quotation (RFQ) for FR301-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 FR301-T reliable?
The price and inventory of FR301-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FR301-T is usually 5 days.
3.What payment methods are accepted for FR301-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FR301-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FR301-T?
FR301-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FR301-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 FR301-T?
For technical support, including FR301-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FR301-T requirements.
6.How does Aetrix verify that FR301-T is sourced from the original manufacturer or authorized distributors?
All FR301-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 FR301-T meets industry standards.
7.What is the process for return or replacement of FR301-T?
All FR301-T units undergo pre-shipment inspection (PSI). If there is an issue with FR301-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 FR301-T part is unused and in its original packaging.
Return procedure for FR301-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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