# N-channel power MOSFET IRLB8721

Manufacturer: Adafruit  |  MPN: 355  |  Category: mosfet
Canonical: https://partsgraph.ai/catalog/parts/adafruit-irlb8721
Image: https://partsgraph.ai/catalog/img/adafruit-irlb8721.jpg (photo: Adafruit, CC BY-SA; sha256 87ce41baca13)

## Attributes (each with provenance)

- **Drain-source voltage**: 30 V
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: ": 30V 8.7m @VGS = 10V 7.6nC l High Frequency Isolated DC-DC Con"
- **Continuous drain current**: 62
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "ous Drain Current, VGS @ 10V 62 ID @ TC = 100°C Continuous Drain Current, VGS @ 10V"
- **Continuous drain current @100°C (A)**: 44
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "ous Drain Current, VGS @ 10V 44 A IDM Pulsed Drain C"
- **Pulsed drain current (A)**: 250
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "Drain Current c 250 PD @TC = 25°C Maximum Power Dissipation g"
- **Max power dissipation @25°C (W)**: 65
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "Power Dissipation g 65"
- **Junction / storage temperature (°C)**: -55 to + 175
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "Operating Junction and -55 to + 175 TSTG Storage Temperature Range"
- **Total gate charge, typ (nC)**: 7.6
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "g Total Gate Charge ––– 7.6 13 Qgs1 Pre-Vth Gate-to-Source Charge"
- **Package**: TO-220AB
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "TO-220AB l Fully Characterized Avalanche Voltage"
- **Gate threshold voltage, max**: 2.35 V
  - source: https://www.adafruit.com/product/355
  - quote: "MOSFET TO-220 Package Vds = 30V max Max current = 62A Vgs = 2.35V max Rds_on = as low as 8.7 milliohm - depending on Vgs Down"
- **On-resistance (min spec)**: 8.7 milliohm
  - source: https://www.adafruit.com/product/355
  - quote: "0V max Max current = 62A Vgs = 2.35V max Rds_on = as low as 8.7 milliohm - depending on Vgs Downloads: Datasheet Tutorials: Driving"
- **Logic-level gate drive**: yes
  - source: https://www.adafruit.com/product/355
  - quote: "t directly from a microcontroller running on 2.8V, 3.3V, or 5V logic. The TO-220 package can dissipate up to 2 Watts without a h"
- **Lead-free (PbF)**: yes
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "IRLB8721PbF and Current l Lead-Free"
- **Gate-source voltage abs max (V)**: ± 20
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "Source Voltage ± 20 ID @ TC = 25°C Continuous Drain Current, VGS @ 10V"
- **Max power dissipation @ TC=100°C (W)**: 33
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "Power Dissipation g 33 Linear Derating Factor"
- **Linear derating factor (W/°C)**: 0.43
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "Derating Factor 0.43 W/°C TJ Operating Junc"
- **Soldering temperature, 10 s (°C)**: 300
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "Soldering Temperature, for 10 seconds 300 (1.6mm from case) Mounting torque, 6-32 o"
- **RθJC junction-to-case, max (°C/W)**: 2.3
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "––– 2.3 RθCS Case-to-Sink, Flat Greased Surface"
- **RθJA junction-to-ambient, max (°C/W)**: 62
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 1) sha256:efa4902a699c
  - quote: "f ––– 62 Notes  through are on page 9 www.irf.com"
- **RDS(on) max @ VGS=4.5V (mΩ)**: 16
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "––– 13.1 16 VGS = 4.5V, I = 25A e"
- **Gate threshold voltage, typ (V)**: 1.80
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "GS(th) Gate Threshold Voltage 1.35 1.80 2.35 V VDS = VGS, ID = 25μA ΔVGS(th)/ΔTJ Gate T"
- **IDSS drain-source leakage, max @ VDS=24V (μA)**: 1.0
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "Drain-to-Source Leakage Current ––– ––– 1.0 μA VDS = 24V, VGS = 0V"
- **IGSS gate forward leakage, max (nA)**: 100
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "Gate-to-Source Forward Leakage ––– ––– 100 nA VGS = 20V Gate-to-Source Reverse"
- **Forward transconductance, min (S)**: 35
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "-20V gfs Forward Transconductance 35 ––– ––– S VDS = 15V, ID = 25A Qg"
- **RG gate resistance, max (Ω)**: 3.8
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "Gate Resistance ––– 2.3 3.8 Ω td(on) Turn-On Delay Time"
- **Rise time, typ (ns)**: 93
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "r Rise Time ––– 93 ––– ID = 25A td(off) Turn-Off Delay T"
- **Input capacitance, typ (pF)**: 1077
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "iss Input Capacitance ––– 1077 ––– VGS = 0V Coss Output Capacitance"
- **EAS single-pulse avalanche energy, max (mJ)**: 98
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "he Energy d ––– 98 mJ IAR Avalanche Current c"
- **Body-diode forward voltage, max (V)**: 1.0
  - source: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (page 2) sha256:efa4902a699c
  - quote: "Diode Forward Voltage ––– ––– 1.0 V TJ = 25°C, IS = 25A, VGS = 0V e trr"
- **Dissipation w/o heatsink, room temp (vendor)**: 2 Watts
  - source: https://www.adafruit.com/product/355
  - quote: ", 3.3V, or 5V logic. The TO-220 package can dissipate up to 2 Watts without a heat sink (at room temperature). Because it has a"
- **Switchable current w/o heatsink (vendor)**: 15 Amperes
  - source: https://www.adafruit.com/product/355
  - quote: "low as 9 milliohms, that means that you can switch at least 15 Amperes without a heat sink - more if you use PWM. For more detaile"
- **Channel polarity**: N-channel
  - source: https://www.adafruit.com/product/355
  - quote: "N-channel power MOSFET [30V / 60A] : Adafruit Industries, Unique & fu"

## Vendors

- Adafruit: https://www.adafruit.com/product/355 (~USD 2.25, indicative as of 2026-08-18)

## Datasheets

- IRLB8721 datasheet: https://cdn-shop.adafruit.com/datasheets/irlb8721pbf.pdf (sha256 efa4902a699c)

Used in builds: plant-waterer (roles: pump-driver)

Machine feed of the whole catalogue: https://partsgraph.ai/catalog/feed.json