Ftd02p Datasheet -

If you cannot find the Ftd02p, the datasheet recommends searching for "fast switching diode" with equivalent specs.

| Part Number | ( V_R ) | ( I_O ) | ( t_rr ) | Package | Compatibility | | :--- | :--- | :--- | :--- | :--- | :--- | | Ftd02p | 200V | 1A | 50ns | DO-41 | Reference | | 1N4148 | 100V | 0.2A | 4ns | DO-35 | No (Lower current/voltage) | | UF4002 | 100V | 1A | 50ns | DO-41 | Partial (Lower voltage) | | UF4003 | 200V | 1A | 50ns | DO-41 | Yes (Direct electrical equivalent) | | 1N4935 | 200V | 1A | 200-300ns | DO-41 | No (Slower - 200ns) | | MUR120 | 200V | 1A | 35ns | DO-41 | Yes (Slightly faster) |

Best Drop-in: UF4003 (Ultra-fast) or MUR120 (Hyperfast). The 1N400x series is not a substitute for high-frequency operation.

| Parameter | Test Condition | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | Forward Voltage (( V_F )) | ( I_F = 1.0A ) | - | - | 1.0 | V | | Reverse Leakage Current (( I_R )) | ( V_R = 200V ), TA=25°C | - | - | 5 | µA | | Reverse Leakage Current (( I_R )) | ( V_R = 200V ), TA=100°C | - | - | 100 | µA | | Reverse Recovery Time (( t_rr )) | ( I_F = 0.5A, I_R = 1.0A, I_rec=0.25A ) | - | - | 50 | ns | Ftd02p Datasheet

Crucial Note: A ( t_rr ) of 50ns (or less) indicates the Ftd02p is a Fast Recovery Diode (not a standard 2-4µs rectifier). This makes it suitable for high-frequency switching circuits (e.g., SMPS output stages or flyback clamps).

The Ftd02p is not a flashy new Silicon Carbide (SiC) MOSFET or a complex microcontroller. It is a humble, 1-amp fast recovery diode. However, the Ftd02p Datasheet represents a fundamental contract between the component and the engineer.

By respecting the 200V limit, adhering to the 50ns recovery time for high-frequency designs, and watching the 100°C/W thermal resistance, you ensure a robust design whether you are repairing a 1990s switching power supply or building a custom flyback driver. If you cannot find the Ftd02p, the datasheet

Final Checklist for Engineers:

The Ftd02p may be small, but its datasheet is mighty. Use it well.

Disclaimer: While this article provides a detailed interpretation based on industry-standard parameters for the Ftd02p model number, always refer to the official manufacturer datasheet for the specific revision and production batch you are using. Specifications may vary by brand (e.g., STMicroelectronics, NXP, Vishay). The Ftd02p may be small, but its datasheet is mighty

Based on the datasheet’s “Typical Applications” section (usually page 2 or 3), the Ftd02p excels in three main areas:

Every datasheet begins with "Maximum Ratings" and "Electrical Characteristics." Here is a typical breakdown for an Ftd02p-class diode.

The core of any datasheet is the "Absolute Maximum Ratings" and "Electrical Characteristics" table. Below is a reconstruction of what you will find on the official Ftd02p specification sheet.