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IRLML2502 N-Channel MOSFET — SOT-23 SMD, 20V 4.2A, Logic-Level Gate (10-Pack)
IRLML2502 N-Channel MOSFET SOT-23 SMD, 20V 4.2A, Logic-Level Gate (10-Pack)
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IRLML2502 — N-Channel Logic-Level MOSFET, SOT-23 SMD
The IRLML2502 is a compact N-channel enhancement-mode MOSFET in a SOT-23 SMD package, optimized for logic-level gate drive from 3.3V and 5V microcontrollers. With a low gate threshold of 0.45–0.9V and an on-resistance of just 45mΩ, it switches efficiently at low voltages — making it the go-to MOSFET for Arduino, ESP32, and Raspberry Pi switching applications.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | IRLML2502 |
| Package | SOT-23 (SMD) |
| Channel Type | N-Channel Enhancement |
| Drain-Source Voltage (VDS) | 20V |
| Continuous Drain Current (ID) | 4.2A |
| On-Resistance (RDS(on)) | 45mΩ @ VGS=4.5V |
| Gate Threshold Voltage (VGS(th)) | 0.45V – 0.9V |
| Gate-Source Voltage (VGS) | ±12V max |
| Total Gate Charge (Qg) | 3.5nC |
| Operating Temperature | -55°C to +150°C |
| Condition | New, Original (Infineon/IR) |
Why Choose IRLML2502?
- True logic-level gate — fully on at VGS=2.5V, compatible with 3.3V and 5V GPIO directly
- Ultra-low RDS(on) = 45mΩ — minimal conduction loss for battery-powered designs
- SOT-23 package — tiny footprint for space-constrained PCBs
- Fast switching — 3.5nC gate charge enables high-frequency PWM control
- 4.2A continuous — handles LED strips, small motors, solenoids, and relay coils
- 10-pack value — enough for multiple projects or production prototypes
Typical Applications
- Arduino / ESP32 / STM32 GPIO switching — control loads directly from 3.3V or 5V pins
- LED driver — PWM dimming of LED strips and high-power LEDs
- Motor control — low-side switch for small DC motors and solenoids
- Battery management — load switch and protection circuits
- Level shifting — bidirectional logic level converter (with pull-up resistors)
- Power management — enable/disable peripheral power rails
Compatible With
Common substitutes include 2N7002, BSS138, SI2302, AO3400 (verify RDS(on) and VGS(th) for your design). IRLML2502 offers lower RDS(on) than 2N7002/BSS138, making it preferred for higher current applications.
FAQ
Q: Can IRLML2502 be driven directly from a 3.3V Arduino or ESP32 GPIO?
A: Yes. With VGS(th) of 0.45–0.9V, the IRLML2502 is fully enhanced at 3.3V gate drive, achieving near-minimum RDS(on).
Q: What is the maximum load current?
A: 4.2A continuous drain current. For PCB designs, ensure adequate copper pour for heat dissipation at higher currents.
Q: Is IRLML2502 suitable for PWM motor control?
A: Yes. The low gate charge (3.5nC) allows efficient switching at PWM frequencies up to several hundred kHz.
Package Contents
- 10× IRLML2502 SOT-23 N-Channel MOSFET (new, original)
