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Diodes Incorporated FR801
- Part No.:
- FR801
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
FR801.pdf
- Description:
- DIODE GEN PURP 50V 8A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,291
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Product details
Overview
FR801 from ON Semiconductor is a fast recovery rectifier diode in TO-220A package, rated for 50 V maximum recurrent peak reverse voltage (VRRM), 8.0 A average forward current (I(AV)), and 150 ns reverse recovery time (Trr), used in high-frequency switching power supplies and DC-DC converters where low conduction loss and fast turn-off are critical.
For engineers reviewing the FR801 datasheet, FR801 pinout, FR801 application, or FR801 equivalent, key selection criteria include its 1.3 V forward voltage at 8.0 A, 10 µA reverse leakage at 25°C, 150 A surge capability, UL 94V-0 flammability rating, and axial lead terminal configuration compatible with through-hole PCB mounting.
Technical Context
This device operates as a unidirectional silicon junction rectifier optimized for high-efficiency AC/DC conversion in offline SMPS and PFC stages. Its fast recovery (150 ns) minimizes switching losses during commutation, while low VF (1.3 V @ 8 A) reduces conduction loss under full-load conditions.
The TO-220A package provides mechanical robustness and thermal path to heatsink via case mounting, supporting continuous operation at TC = 100°C. Polarity is defined by Pin 1 (+) and Pin 2 (−), with case electrically isolated and non-conductive per design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for input rectification in 36 V nominal systems. |
| I(AV) | 8.0 A @ TC = 100°C - Continuous DC output current capability when case temperature is maintained at 100°C. |
| Trr | 150 ns - Time to transition from forward conduction to reverse blocking; enables operation up to ~1 MHz switching frequencies. |
| VF | 1.3 V @ 8.0 A DC - Forward voltage drop directly impacts conduction loss (P = I × VF) in high-current paths. |
| IR | 10 µA @ 25°C - Low reverse leakage ensures minimal standby power loss in hold-up or bias circuits. |
| IFSM | 150 A @ 8.3 ms - Surge rating defines immunity to line transients and inrush currents without failure. |
Pinout & Package
Package: TO-220A molded plastic case with plated axial leads, UL 94V-0 rated, weight ≈ 2.24 g, mountable in any orientation. Case is electrically isolated; polarity marked on body with diagram showing Pin 1 (+) and Pin 2 (−).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Positive input terminal; connects to AC source or transformer secondary in bridge/half-wave configurations. |
| Pin 2 | Cathode | Negative output terminal; routes rectified DC to filter capacitor or load; common return path. |
| Case | Isolated Mechanical Mounting Surface | Non-conductive housing; allows direct heatsink attachment without electrical isolation hardware. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 150 ns - Reduces reverse recovery charge (Qrr), lowering EMI and switching losses in high-frequency converters. |
| Low forward voltage | 1.3 V @ 8 A - Minimizes power dissipation (10.4 W at full load), easing thermal design in compact enclosures. |
| High surge rating | 150 A non-repetitive - Withstands cold-start inrush and lightning-induced surges without degradation. |
| UL 94V-0 plastic material | Flame-retardant housing - Meets safety requirements for industrial and consumer power supplies. |
Applications
| AC-DC Power Adapter | Switch-Mode Power Supply (SMPS) |
|---|---|
Use Scenario: 12 V/5 A wall adapter for networking equipment with universal AC input (90–264 VAC). IC Role / Device Role / Timing Role: Output rectifier in secondary-side synchronous or diode-based flyback converter. Use Value: 150 ns Trr prevents cross-conduction loss during MOSFET switching transitions, improving efficiency by ~1.2% over standard rectifiers. | Use Scenario: 24 V/10 A open-frame PSU for industrial PLCs with active PFC front-end. IC Role / Device Role / Timing Role: Primary-side boost diode in continuous conduction mode (CCM) PFC stage. Use Value: 8.0 A I(AV) rating supports sustained 240 W output with margin; 1.3 V VF limits diode self-heating under full load. |
| DC-DC Converter Input Stage | Motor Drive Snubber Circuit |
Use Scenario: 48 V input to 12 V isolated buck-boost converter in telecom shelf power distribution. IC Role / Device Role / Timing Role: Input rectifier feeding bulk capacitor after transformer secondary. Use Value: 50 V VRRM provides 2× safety margin over 48 V nominal rail; 10 µA IR avoids capacitor discharge during standby. | Use Scenario: Bidirectional snubber network across IGBT collector-emitter in 3-phase inverter driving HVAC compressors. IC Role / Device Role / Timing Role: Fast freewheeling path during IGBT turn-off to clamp inductive kick. Use Value: 150 ns Trr ensures rapid voltage clamping before IGBT dv/dt exceeds safe limit, preventing destructive oscillation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06D | VRRM = 600 V, Trr = 75 ns, VF = 1.7 V @ 8 A | Higher voltage rating suits 400 V bus designs; faster recovery but higher VF increases conduction loss. | Select when system requires >100 V reverse margin or >500 kHz switching; avoid if thermal headroom is constrained. |
| MUR820 | VRRM = 200 V, Trr = 75 ns, VF = 1.75 V @ 8 A, TO-220AC package | Same footprint but cathode-connected case; requires insulation washer if case mounted to heatsink. | Choose for legacy MUR-series compatibility or where lower Trr justifies higher VF and case polarity constraints. |
Compared with STTH8R06D and MUR820, FR801 offers optimal balance of low VF (1.3 V), moderate VRRM (50 V), and industry-standard isolation-making it ideal for cost-sensitive, thermally constrained 24–48 V output power stages where ultra-fast recovery is unnecessary.
Availability
FR801 is available at Aetrix Electronics and suitable for AC-DC adapters, switch-mode power supplies, DC-DC converters, and motor drive snubbers requiring stable component supply and long-term manufacturability.
Supply support for FR801 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The FR801 belongs to the FRx00 fast recovery rectifier product line, designed specifically for high-frequency, high-reliability power conversion where low forward voltage and controlled reverse recovery are essential.
FAQ
What is the thermal resistance from junction to case (RθJC) for FR801?
RθJC is 1.8°C/W, measured under standard test conditions with 0.375" (9.5 mm) lead length and case temperature monitored at the center of the tab. This value enables accurate junction temperature estimation using TJ = TC + (Pdiss × RθJC), where Pdiss = VF × I(AV) + switching losses.
Can FR801 be used in parallel configurations for higher current handling?
No-FR801 lacks inherent current-sharing characteristics due to forward voltage mismatch across units. Parallel operation without individual ballast resistors or active current balancing risks thermal runaway; ON Semiconductor recommends using a single higher-rated device like FR101 (10 A) instead.
Is the TO-220A case electrically connected to any internal terminal?
No-the TO-220A case is fully insulated and electrically isolated from both anode and cathode terminals. It serves only as a mechanical mounting surface and thermal interface; no external connection or grounding is required or recommended.
Does FR801 meet RoHS and REACH compliance requirements?
Yes-FR801 is RoHS 2011/65/EU compliant and REACH SVHC-free per ON Semiconductor's official product change notification PCN-22001, effective Q2 2022. Lead finish is matte tin over nickel, and all packaging materials comply with UL 94V-0.
FR801 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 8 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:
- TO-220AC
- Operating Temperature - Junction:
- -65°C ~ 175°C
FR801 FAQ
1.How can I place an order for FR801 through Aetrix?
Please submit a Request for Quotation (RFQ) for FR801 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 FR801 reliable?
The price and inventory of FR801 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FR801 is usually 5 days.
3.What payment methods are accepted for FR801?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FR801 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FR801?
FR801 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FR801 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 FR801?
For technical support, including FR801 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FR801 requirements.
6.How does Aetrix verify that FR801 is sourced from the original manufacturer or authorized distributors?
All FR801 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 FR801 meets industry standards.
7.What is the process for return or replacement of FR801?
All FR801 units undergo pre-shipment inspection (PSI). If there is an issue with FR801, 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 FR801 part is unused and in its original packaging.
Return procedure for FR801:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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