| Parameter | Ftd02p | 1N4002 (Standard) | 1N5819 (Schottky) | UF4002 (Ultrafast) | | :--- | :--- | :--- | :--- | :--- | | | 2.0A | 1.0A | 1.0A | 1.0A | | Reverse Voltage | 200V | 100V | 40V | 100V | | Recovery Time | 50ns | 30µs | <1ns (no recovery) | 50ns | | Forward Voltage @ 1A | 0.85V | 1.1V | 0.45V | 1.0V | | Best For | 2A, 200V SMPS | 50/60Hz line | Low voltage, high efficiency | 1A ultrafast switching |

Enter electrical parameters rather than just the part number.

Controls the flow of current between the Source and Drain.

: Bidirectional H-bridge configurations and switch-mode power supplies (SMPS)

The reveals a component that sits perfectly at the intersection of speed and voltage handling. With a 200V blocking capability, 2A forward current, and a 50ns reverse recovery time, it is an unsung hero in low-power switching power supplies, inductive load drivers, and DC polarity protection circuits.

For clarity, the replacement equivalents are:

If the P-channel FTD02P has blown, the companion N-channel FTD01N has likely suffered latent electrical stress. Replacing only one chip often causes the remaining weakened transistor to fail shortly after power-up, potentially destroying the motherboard's main driver ICs.

Note: FTD02P appears to be a less common or possibly obsolete part number. If you have a specific manufacturer in mind (e.g., Fairchild, ON Semiconductor, Infineon), please verify the exact part number—common similar parts include FQD02P, FDT02P, or 2SJ series. This guide assumes it’s a P-channel MOSFET or similar power device.

: Place the positive probe on the output terminal and the negative probe on the common source terminal. A reading close to 0.00V indicates a dead short.

These specs define how the FTD02P performs under specific operating conditions ( unless otherwise noted). Static Characteristics Drain-Source Breakdown Voltage (

: Genuine replacement pairs can be found through specialized component retailers such as AliExpress

| Step | Test | Procedure | | Failure (Faulty) Indication | | :--- | :--- | :--- | :--- | :--- | | 1 | Basic Diode Test (Collector → Emitter) | Set DMM to diode mode. Connect Red Probe → Collector , Black Probe → Emitter . | Reads Open Circuit (OL) or a diode drop (0.3-0.7 V). | Reads 0.000 V (shorted) or very low resistance. | | 2 | Reverse Probes (Emitter → Collector) | Keep DMM in diode mode. Connect Black Probe → Collector , Red Probe → Emitter . | Typically reads Open Circuit (OL) in this direction. | Same reading as Step 1 (conduction in both directions). | | 3 | Gate Charging Test | 1. Touch Red Probe to Gate , Black to Emitter for 1 second (charges gate). 2. Move Red Probe to Collector , Black to Emitter . | After charging, you should now see a diode drop or partial conduction. | No change (still shows OL) or suddenly shows a short . | | 4 | Discharge & Repeat | Touch all three pins together with a finger or metal tool to discharge the gate, then retest. | A healthy transistor should turn on and off consistently each time . | N/A (This step confirms consistent healthy behavior). |

Ftd02p Datasheet Jun 2026

| Parameter | Ftd02p | 1N4002 (Standard) | 1N5819 (Schottky) | UF4002 (Ultrafast) | | :--- | :--- | :--- | :--- | :--- | | | 2.0A | 1.0A | 1.0A | 1.0A | | Reverse Voltage | 200V | 100V | 40V | 100V | | Recovery Time | 50ns | 30µs | <1ns (no recovery) | 50ns | | Forward Voltage @ 1A | 0.85V | 1.1V | 0.45V | 1.0V | | Best For | 2A, 200V SMPS | 50/60Hz line | Low voltage, high efficiency | 1A ultrafast switching |

Enter electrical parameters rather than just the part number.

Controls the flow of current between the Source and Drain.

: Bidirectional H-bridge configurations and switch-mode power supplies (SMPS) Ftd02p Datasheet

The reveals a component that sits perfectly at the intersection of speed and voltage handling. With a 200V blocking capability, 2A forward current, and a 50ns reverse recovery time, it is an unsung hero in low-power switching power supplies, inductive load drivers, and DC polarity protection circuits.

For clarity, the replacement equivalents are:

If the P-channel FTD02P has blown, the companion N-channel FTD01N has likely suffered latent electrical stress. Replacing only one chip often causes the remaining weakened transistor to fail shortly after power-up, potentially destroying the motherboard's main driver ICs. | Parameter | Ftd02p | 1N4002 (Standard) |

Note: FTD02P appears to be a less common or possibly obsolete part number. If you have a specific manufacturer in mind (e.g., Fairchild, ON Semiconductor, Infineon), please verify the exact part number—common similar parts include FQD02P, FDT02P, or 2SJ series. This guide assumes it’s a P-channel MOSFET or similar power device.

: Place the positive probe on the output terminal and the negative probe on the common source terminal. A reading close to 0.00V indicates a dead short.

These specs define how the FTD02P performs under specific operating conditions ( unless otherwise noted). Static Characteristics Drain-Source Breakdown Voltage ( With a 200V blocking capability, 2A forward current,

: Genuine replacement pairs can be found through specialized component retailers such as AliExpress

| Step | Test | Procedure | | Failure (Faulty) Indication | | :--- | :--- | :--- | :--- | :--- | | 1 | Basic Diode Test (Collector → Emitter) | Set DMM to diode mode. Connect Red Probe → Collector , Black Probe → Emitter . | Reads Open Circuit (OL) or a diode drop (0.3-0.7 V). | Reads 0.000 V (shorted) or very low resistance. | | 2 | Reverse Probes (Emitter → Collector) | Keep DMM in diode mode. Connect Black Probe → Collector , Red Probe → Emitter . | Typically reads Open Circuit (OL) in this direction. | Same reading as Step 1 (conduction in both directions). | | 3 | Gate Charging Test | 1. Touch Red Probe to Gate , Black to Emitter for 1 second (charges gate). 2. Move Red Probe to Collector , Black to Emitter . | After charging, you should now see a diode drop or partial conduction. | No change (still shows OL) or suddenly shows a short . | | 4 | Discharge & Repeat | Touch all three pins together with a finger or metal tool to discharge the gate, then retest. | A healthy transistor should turn on and off consistently each time . | N/A (This step confirms consistent healthy behavior). |