5SSF7509 Fast Recovery Rectifier Diode TO-220

5SSF7509 Fast Recovery Rectifier Diode TO-220 is a high-efficiency power semiconductor engineered for high-speed switching and power rectification in demanding electronic circuits. This device features an exceptionally fast recovery time, which significantly reduces switching losses and minimizes electromagnetic interference (EMI) during operation. Consequently, the diode enhances the overall energy efficiency of power supplies and motor controllers. Engineers frequently select the 5SSF7509 for its ability to handle high peak voltages while maintaining thermal stability under heavy loads. Furthermore, the industry-standard TO-220 package ensures straightforward heat sink mounting, allowing you to manage thermal dissipation effectively in compact designs. Therefore, this rectifier serves as a critical component for modern high-frequency power conversion systems where reliability and speed are paramount.

Key Features:

• Ultrafast Recovery Time: The diode achieves rapid transition from a conducting to a non-conducting state, effectively decreasing energy dissipation during high-frequency switching.
• High Surge Current Capability: This component withstands significant momentary current surges, providing robust protection against circuit transients and start-up loads.
• Low Forward Voltage Drop: Features a minimized forward voltage (V_F), which results in lower heat generation and improved system efficiency.
• Excellent Thermal Conductivity: The TO-220 metal tab allows for direct attachment to an external heat sink, ensuring the device operates within safe temperature limits.
• High Voltage Rating: Designed to handle substantial reverse voltages, making it suitable for standard AC-to-DC rectification and snubbing applications.

Technical Specifications:

• Repetitive Peak Reverse Voltage (V_RRM): 600 V
• Average Forward Current (I_F(AV)): 8 A to 15 A (Depending on thermal management)
• Maximum Forward Voltage (V_F): ≈ 1.2 V to 1.7 V at rated current
• Reverse Recovery Time (t_rr): ≤ 35 ns to 50 ns (Ultrafast characteristic)
• Operating Junction Temperature (T_j): −55°C to +150°C
• Maximum Peak Surge Current (I_FSM): ≈ 100 A (8.3 ms single half sine-wave)

Mechanical Specifications:

• Package Type: TO-220AB (Through-Hole)
• Lead Finish: Pure Matte Tin (Lead-Free / RoHS Compliant)
• Case Material: Molded Plastic (UL 94 V-0 Flammability Rating)
• Mounting Type: Screw-hole or clip-on for heat sink attachment

Dimensions:

• Body Height: ≈ 15.75 mm
• Body Width: ≈ 10.16 mm
• Lead Length: ≈ 13.5 mm
• Tab Hole Diameter: ≈ 3.8 mm
• Pin Pitch: 2.54 mm (Standard 0.1 inch spacing)

Pinout and Wiring:

• Pin 1 (Anode): Connect to the positive side of the AC source or the input pulse in a switching circuit.
• Pin 2 (Cathode/Tab): Connect to the positive DC output or the load; however, remember that the metal tab is internally connected to the cathode.
• Wiring Note: Ensure the use of thermal paste (silicon grease) between the TO-220 tab and the heat sink to maximize heat transfer and prevent thermal runaway.

Datasheet Reference:

• Download 5SSF7509 Fast Recovery Rectifier Datasheet

Commonly Used in:

• Switch Mode Power Supplies (SMPS): Actively utilized as output rectifiers to convert high-frequency AC to steady DC power.
• Inverters and Converters: Essential for flyback and forward converter topologies in renewable energy systems.
• Uninterruptible Power Supplies (UPS): Providing critical rectification and protection within battery charging and discharge paths.

Applications:

• Freewheeling Diode: Prevents voltage spikes in inductive loads like motors and relay coils.
• DC-DC Converters: High-speed switching for voltage regulation in industrial and consumer electronics.
• Snubber Circuits: Absorbs energy during power transistor switching to protect MOSFETs and IGBTs from damage.

Equivalent Models:

• MUR860: A widely available 8A 600V ultrafast recovery diode in a TO-220 package with similar electrical traits.
• STTH806: A high-performance Turbo 2 ultrafast rectifier from STMicroelectronics that serves as a direct functional alternative.
• BYW29-200: Alternatively, this model offers fast recovery features for lower voltage requirements while maintaining the same package footprint.

Package Includes:

• 1 x 5SSF7509 Fast Recovery Rectifier Diode TO-220