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Diodes Incorporated FR304-T
- Part No.:
- FR304-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
FR304-T.pdf
- Description:
- DIODE GEN PURP 400V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,347
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Product details
Overview
FR304-T from Diodes Incorporated is a 400 V, 3.0 A fast recovery rectifier diode in DO-201AD package with 150 ns reverse recovery time (Trr), 1.3 V forward voltage at 3.0 A, and 10 µA maximum reverse leakage at rated voltage-used in switch-mode power supply output stages and DC-DC converter freewheeling paths.
For engineers reviewing the FR304-T datasheet, FR304-T pinout, FR304-T application, or FR304-T equivalent, key selection criteria include Trr ≤ 150 ns for reduced switching loss, VRRM = 400 V for 280 VAC input derating, IFSM = 150 A surge capability, and DO-201AD axial-lead mechanical compatibility with through-hole PCB layouts.
Technical Context
This device operates as a unidirectional silicon PN junction rectifier optimized for high-frequency switching applications. Its fast recovery behavior stems from controlled carrier lifetime reduction, enabling efficient operation up to 100 kHz in offline SMPS and PFC boost diodes.
Rated for continuous average forward current of 3.0 A at 75°C ambient with 9.5 mm lead length, it maintains low conduction loss (VF = 1.3 V) while limiting reverse recovery charge (Qrr ≈ 35 nC, derived from Trr = 150 ns, IF = 0.5 A, IR = 1.0 A per note 1) to minimize EMI and diode-induced voltage spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - supports 280 VAC RMS input after 20% safety margin in bridge rectifiers |
| I(AV) | 3.0 A - continuous DC output current capability at 75°C with 9.5 mm leads |
| Trr | 150 ns - enables <100 kHz switching without excessive turn-off loss or ringing |
| VF @ 3.0 A | 1.3 V - yields ~3.9 W conduction loss at full load, critical for thermal design |
| IR @ VRRM | 10 µA - ensures minimal standby leakage in high-impedance hold-up circuits |
| IFSM | 150 A - withstands single half-sine surge from cold-start inrush or line transients |
| CJ @ 4 V | 70 pF - limits capacitive coupling noise in high-dv/dt gate-drive isolation paths |
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 (Lead 1) | Forward current entry point | Connected to AC input or switching node; must handle full I(AV) and IFSM |
| Cathode (Lead 2, banded) | Forward current exit / reverse blocking terminal | Connected to output capacitor or ground return; defines polarity in bridge configuration |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | Trr = 150 ns reduces turn-off energy loss and EMI generation in 50–100 kHz converters |
| Low forward voltage | VF = 1.3 V at 3.0 A lowers conduction loss versus standard rectifiers (e.g., 1N5408: VF ≈ 1.2 V but Trr > 2 µs) |
| High surge rating | IFSM = 150 A supports repeated cold-start surges without degradation |
| UL 94V-0 flammability | Meets safety standards for enclosed industrial and medical power supplies |
Applications
| AC-DC Adapter Output Stage | DC-DC Converter Freewheeling Diode |
|---|---|
Use Scenario: 12 V/2.5 A isolated flyback adapter for IoT gateway power. IC Role / Device Role / Timing Role: Output rectifier converting transformer secondary AC to regulated DC; conducts during MOSFET off-time. Use Value: 150 ns Trr minimizes voltage overshoot across primary MOSFET, reducing snubber losses and improving efficiency by ~0.8% vs. standard recovery diodes. | Use Scenario: 5 V/3 A buck converter supplying FPGA core voltage. IC Role / Device Role / Timing Role: Synchronous rectification replacement in non-synchronous design; freewheels inductor current when high-side switch is off. Use Value: 1.3 V VF at 3 A enables stable regulation under transient load steps without thermal runaway observed with higher-VF alternatives. |
| Industrial PLC Power Input Rectification | LED Driver Bridge Leg |
Use Scenario: 24 VDC input stage accepting 18–32 VDC with reverse polarity protection. IC Role / Device Role / Timing Role: Single-leg rectifier in discrete bridge configuration; blocks reverse input while conducting forward current. Use Value: 10 µA IR at 400 V ensures negligible standby current draw in always-on control modules, extending system battery backup runtime. | Use Scenario: Constant-current LED driver with 350 mA output driving 12 V string from 120 VAC. IC Role / Device Role / Timing Role: One leg of full-wave bridge rectifying AC line before buck regulator stage. Use Value: DO-201AD axial leads allow direct mounting on heatsink-equipped chassis, dissipating 3.9 W without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PR3004G | VRRM = 400 V, Trr = 150 ns, same DO-201AD package, but AEC-Q101 qualified | Required for automotive-grade power modules where qualification traceability is mandatory | Select PR3004G when ISO/TS 16949 compliance or extended temperature validation (-40°C to +150°C TJ) is required |
| STTH3L04 | VRRM = 400 V, I(AV) = 3.0 A, Trr = 120 ns, TO-220AC package with tab | Requires heatsink mounting and different footprint; lower Trr improves high-frequency efficiency | Choose STTH3L04 only if board layout allows TO-220 footprint and thermal management supports tab-to-heatsink attachment |
Compared with PR3004G and STTH3L04, FR304-T offers identical electrical specs in a cost-optimized, industry-standard DO-201AD package-ideal for commercial/industrial SMPS where AEC-Q101 or TO-220 thermal performance is unnecessary.
Availability
FR304-T is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC converters, and industrial PLC power supplies requiring stable component supply and long-term manufacturability.
Supply support for FR304-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, serving industrial, computing, consumer, and communications markets.
The FR30x series belongs to Diodes' general-purpose fast recovery rectifier product line, designed specifically for cost-sensitive, high-volume power conversion applications demanding reliable 3 A switching performance at 400–1000 V blocking levels.
FAQ
What is the maximum junction temperature for FR304-T?
The FR304-T has an operating junction temperature range of –65°C to +175°C. Its thermal resistance (RθJA) is not specified in the datasheet, but typical DO-201AD construction yields RθJA ≈ 60°C/W with 9.5 mm leads and no heatsink-limiting continuous power dissipation to ~1.2 W at 75°C ambient.
Is FR304-T suitable for use in synchronous rectification circuits?
No-FR304-T is a passive PN junction diode and cannot be actively controlled. It is intended for non-synchronous freewheeling or output rectification. Synchronous rectification requires MOSFETs with gate drive timing aligned to switching waveforms, which this device does not support.
Does FR304-T have lead-free and RoHS-compliant construction?
Yes-FR304-T is manufactured with lead-free terminations and complies with EU RoHS Directive 2011/65/EU and China RoHS. The device carries the "Pb-Free" marking on packaging and meets JEDEC J-STD-020 moisture sensitivity level MSL-1 (unlimited floor life).
Can FR304-T replace FR305 in a 600 V design?
No-FR304-T has VRRM = 400 V and is not rated for 600 V peak reverse voltage. Substituting it for FR305 (VRRM = 600 V) risks catastrophic failure during line surges or reflected transients. Derating rules require ≥20% margin; 400 V devices are unsuitable for 600 V systems.
FR304-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):
- 400 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 @ 400 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 175°C
FR304-T FAQ
1.How can I place an order for FR304-T through Aetrix?
Please submit a Request for Quotation (RFQ) for FR304-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 FR304-T reliable?
The price and inventory of FR304-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FR304-T is usually 5 days.
3.What payment methods are accepted for FR304-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FR304-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FR304-T?
FR304-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FR304-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 FR304-T?
For technical support, including FR304-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FR304-T requirements.
6.How does Aetrix verify that FR304-T is sourced from the original manufacturer or authorized distributors?
All FR304-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 FR304-T meets industry standards.
7.What is the process for return or replacement of FR304-T?
All FR304-T units undergo pre-shipment inspection (PSI). If there is an issue with FR304-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 FR304-T part is unused and in its original packaging.
Return procedure for FR304-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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