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IRLB8721

Public Made by Adom

by adom

Infineon logic-level N-channel power MOSFET, TO-220. 30 V, 62 A, low RDS(on), drives from 3.3 V logic. Datasheet-verified.

componentdiscretemosfetn-channellogic-levelto-220infineon
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Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
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docs irlb8721: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
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irlb8721-etched.fit.json irlb8721: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
irlb8721-etched.glb irlb8721: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
irlb8721-etched.step irlb8721: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
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IRLB8721

Infineon · N-channel MOSFET · TO-220

Logic-level N-channel power MOSFET that turns fully on from a 3.3 or 5 V gate drive, so a microcontroller pin can switch it directly without a gate driver. It blocks 30 V, carries up to 62 A, and has a low on-resistance (about 8.7 mOhm at 10 V gate, and still low at 4.5 V), which keeps heating down when switching motors, LEDs, and heaters. The TO-220 bolts to a heatsink for higher current. A common logic-level switch for hobby and low-voltage power control.

Pinout

Pin Name Type Function
1 G input Gate. Insulated MOS gate controlling channel conduction. Threshold voltage VGS(th) = 1.35-2.35 V (typ 1.80 V). Absolute maximum VGS = ±20 V. Typical total gate charge Qg = 7.6 nC at VGS=4.5V/VDS=15V/ID=25A; internal gate resistance RG ≈ 2.3 Ω.
2 D passive Drain. Positive terminal of the N-channel MOSFET (also connects to the tab / thermal pad). Absolute maximum VDS = 30 V. Continuous drain current ID = 62 A at TC=25°C (44 A at TC=100°C); pulsed IDM = 250 A. Static RDS(on) max 8.7 mΩ @ VGS=10V, 16 mΩ @ VGS=4.5V.
3 S passive Source. Reference terminal for the N-channel MOSFET. Also the anode of the intrinsic body diode (drain = cathode): VSD ≤ 1.0 V, trr typ 16 ns, Qrr typ 14 nC, continuous body-diode source current IS = 62 A.

Key specifications

Parameter Value
Type N-channel logic-level MOSFET
VDS 30 V
ID (continuous) 62 A
RDS(on) 8.7 mOhm (VGS=10 V)
Gate threshold 1.35-2.35 V
Gate drive Logic-level (3.3-5 V)
Package TO-220

Ordering variants

Same part, different packaging or reel option.

  • IRLB8721PBF (TO-220)
  • IRLB8721PbF (TO-220, lead-free)

CAD (KiCad official)

  • Symbol: Transistor_FET:IRLB8721PBF (KiCad official)
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220 (KiCad packages3D, STEP)
  • 3D model files: irlb8721-etched.step / irlb8721-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); irlb8721.step / irlb8721.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Infineon datasheet (10 pp, sha256 8a313aecdd1e7725, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF