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Diodes Incorporated FR303-T
- Part No.:
- FR303-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
FR303-T.pdf
- Description:
- DIODE GEN PURP 200V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,147
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Product details
Overview
FR303-T from Diodes Incorporated is a 200 V, 3.0 A fast recovery rectifier diode in DO-201AD axial package, featuring 150 ns reverse recovery time (Trr), 1.3 V forward voltage at 3.0 A, and 10 µA max reverse leakage at rated voltage - used in switch-mode power supply output stages and AC/DC front-end rectification.
For engineers reviewing the FR303-T datasheet, FR303-T pinout, FR303-T application, or FR303-T equivalent, key selection criteria include Trr ≤ 150 ns, VRRM = 200 V, I(AV) = 3.0 A at 75°C, VF ≤ 1.3 V @ 3.0 A, and DO-201AD mechanical compatibility with axial PCB mounting.
Technical Context
This device is a silicon planar epitaxial fast recovery rectifier optimized for high-frequency switching applications where low reverse recovery charge (Qrr) and minimal tail current reduce switching losses. Its 150 ns Trr is measured under standardized conditions (IF = 0.5 A, IR = 1.0 A, IRR = 0.25 A), and junction capacitance is 70 pF at 4.0 V reverse bias and 1 MHz.
The DO-201AD package supports axial lead soldering per MIL-STD-202 Method 208, with UL 94V-0 flammability rating and operating temperature range of –65°C to +175°C - enabling use in industrial power supplies and automotive auxiliary power modules where thermal robustness and reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - maximum repetitive peak reverse voltage; defines safe blocking capability in 200 V-rated AC line or DC bus applications |
| I(AV) | 3.0 A @ TA = 75°C - average forward current rating with 9.5 mm lead length; sets continuous power handling in half-wave rectifier designs |
| Trr | 150 ns - measured reverse recovery time; enables operation up to ~1 MHz switching frequencies with low turn-off loss |
| VF | 1.3 V @ 3.0 A DC - forward voltage drop; determines conduction loss of 3.9 W at full rated current |
| IR | 10 µA @ 200 V - max DC reverse leakage; ensures minimal standby power loss in high-impedance hold-up circuits |
| CJ | 70 pF @ 4.0 V, 1 MHz - junction capacitance; impacts high-frequency noise coupling and snubber design in SMPS outputs |
Pinout & Package
DO-201AD molded plastic package with axial leads; cathode identified by color band; UL 94V-0 rated; weight ≈ 1.1 g; mountable in any orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or AC input phase) |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output filter capacitor positive rail or DC bus; polarity marking prevents reverse installation |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 150 ns Trr enables efficient operation in 100–500 kHz SMPS without excessive switching loss |
| Low forward voltage | 1.3 V @ 3.0 A reduces conduction loss vs. standard rectifiers (e.g., 1N5408: ~1.5 V), improving efficiency by ~1.5% at full load |
| High surge capability | 150 A non-repetitive peak surge current withstands cold-start inrush and transient overloads |
| Wide temperature range | –65°C to +175°C junction operation supports under-hood automotive and industrial ambient extremes |
Applications
| AC/DC Adapter Output Rectification | DC-DC Converter Secondary Side |
|---|---|
Use Scenario: 12 V/3 A isolated flyback adapter for networking equipment with 60 Hz input and 100 kHz switching frequency. IC Role / Device Role / Timing Role: Fast recovery rectifier conducting during transformer secondary positive half-cycle; replaces slower general-purpose diodes to minimize switching loss. Use Value: 150 ns Trr reduces reverse recovery energy loss by ~40% vs. 500 ns diodes, lowering MOSFET stress and improving thermal margin. | Use Scenario: 48 V to 5 V isolated forward converter in telecom power shelf with synchronous rectification not implemented. IC Role / Device Role / Timing Role: Primary-side freewheeling diode clamping transformer reset voltage; handles 3 A average current with 150 A surge tolerance. Use Value: 1.3 V VF and 150 ns Trr jointly reduce total power loss to < 4.5 W, allowing TO-220 heatsink elimination in compact form factor. |
| Industrial Motor Drive Snubber Circuit | Automotive Auxiliary Power Supply |
Use Scenario: RC snubber across IGBT collector-emitter in 3 kW HVAC inverter with 10 kHz PWM switching. IC Role / Device Role / Timing Role: Fast recovery clamp diode absorbing inductive kickback energy during IGBT turn-off. Use Value: 70 pF junction capacitance and 150 ns Trr ensure rapid voltage clamping without oscillation, protecting IGBT gate drive integrity. | Use Scenario: 24 V input rectification stage in vehicle body control module with cold-crank (-40°C) and load-dump (+40 V) transients. IC Role / Device Role / Timing Role: Input bridge rectifier converting alternator AC to DC; must survive 150 A surge and operate down to –65°C. Use Value: –65°C to +175°C rating and 150 A IFSM allow direct replacement of legacy parts without derating or redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PR3003G | VRRM = 200 V, Trr = 150 ns, same DO-201AD package, but AEC-Q101 qualified and RoHS-compliant | Approved for automotive-grade production; higher screening cost but required for OEM Tier-1 BOMs | Select PR3003G when automotive qualification or extended lifecycle support is mandatory |
| STTH3L02 | VRRM = 200 V, I(AV) = 3.0 A, Trr = 110 ns, TO-220AC package with tab isolation | Requires heatsink mounting; lower Trr improves high-frequency efficiency but increases board area and assembly cost | Choose STTH3L02 only if sub-120 ns Trr is critical and thermal management infrastructure exists |
Compared with PR3003G and STTH3L02, FR303-T offers identical electrical specs in a lower-cost, industry-standard DO-201AD package - optimal for cost-sensitive industrial and consumer power supplies where AEC-Q101 or ultra-low Trr are not required.
Availability
FR303-T is available at Aetrix Electronics and suitable for AC/DC adapters, DC-DC converter secondary rectification, industrial motor drive snubbers, and automotive auxiliary power supplies requiring stable component supply and long-term sourcing continuity.
Supply support for FR303-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, manufacturing, and sales operations across Asia, Europe, and the Americas.
The FR30x series belongs to Diodes' fast recovery rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in industrial, computing, and consumer applications - emphasizing low Trr, low VF, and rugged thermal performance.
FAQ
Is FR303-T suitable for surface-mount assembly?
No. FR303-T uses axial leads in the DO-201AD through-hole package and is not designed for SMT reflow or wave soldering. It requires manual or automated axial insertion and lead trimming. For SMT alternatives, consider Diodes' AP3003W (SMA package) or SB320 (SMB).
What is the maximum allowable case temperature during operation?
The FR303-T has no specified maximum case temperature; its thermal limit is defined by junction temperature (TJ ≤ +175°C). With 9.5 mm lead length, thermal resistance from junction to ambient is approximately 50°C/W. Derating curves show I(AV) drops to zero at TA = 175°C, so practical case temperature should remain below 125°C for reliable long-term operation.
Does FR303-T have avalanche rating?
No. FR303-T is not avalanche-rated. Its absolute maximum rating for non-repetitive peak reverse voltage is VRRM = 200 V; operation beyond this - including unclamped inductive switching - may cause catastrophic failure. External clamping (e.g., TVS or RCD snubber) is required in inductive switching applications.
Can FR303-T replace FR302-T in an existing design?
Yes, with verification. FR303-T (200 V VRRM) can substitute FR302-T (100 V VRRM) where circuit peak reverse voltage does not exceed 200 V. However, VF and Trr are nearly identical, so thermal and switching behavior will be similar - confirm layout clearance and surge margin meet revised voltage rating requirements.
FR303-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):
- 200 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 @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 175°C
FR303-T FAQ
1.How can I place an order for FR303-T through Aetrix?
Please submit a Request for Quotation (RFQ) for FR303-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 FR303-T reliable?
The price and inventory of FR303-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FR303-T is usually 5 days.
3.What payment methods are accepted for FR303-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FR303-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FR303-T?
FR303-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FR303-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 FR303-T?
For technical support, including FR303-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FR303-T requirements.
6.How does Aetrix verify that FR303-T is sourced from the original manufacturer or authorized distributors?
All FR303-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 FR303-T meets industry standards.
7.What is the process for return or replacement of FR303-T?
All FR303-T units undergo pre-shipment inspection (PSI). If there is an issue with FR303-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 FR303-T part is unused and in its original packaging.
Return procedure for FR303-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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