Spark Logic

IRLB3034 N-channel MOSFET connection guide

IRLB3034 N-channel MOSFET TO-220AB wiring guide with power, signal assignments, and bench checks.

TO-220AB

4 contacts Current package

Infineon / International Rectifier · Three lead positions and a connected metal tab.

Check that the switch is off

Required

Use a current-limited 5 V supply and a 1 kΩ resistive load. Pull the gate down to its source through 10 kΩ.

  • 5 V
    • Current-limited 5 V supply
    • RL.1
  • Switched node
  • Return
    • S (3)
    • Supply return
    • Gate supply return
    • RPD.2
    • Meter common
  • Gate
RL 1 kΩ between 5 V and Switched node5 VRL 1 kΩSwitched node
RPD 10 kΩ between Gate and ReturnGateRPD 10 kΩReturn

Bench checks

  • VGS should be approximately 0 V, and the switched node should sit near 5 V.

International Rectifier IRLB3034PbF, terminal diagram and electrical characteristics. The resistors are fixture choices.

Connection scenarios

Switch on a small resistive load

Use a 0/5 V gate drive through 100 Ω. Keep the 10 kΩ pull-down in place to define the state when the gate driver is disconnected.

  • 5 V
    • Current-limited 5 V supply
    • RL.1
  • Switched node
  • Return
    • S (3)
    • Supply return
    • Gate supply return
    • RPD.2
    • Meter common
  • Gate
  • Drive
    • Gate-driver output
    • RG.1
RL 1 kΩ between 5 V and Switched node5 VRL 1 kΩSwitched node
RPD 10 kΩ between Gate and ReturnGateRPD 10 kΩReturn
RG 100 Ω between Drive and GateDriveRG 100 ΩGate

Bench checks

  • With the gate near 5 V relative to source, the switched node should fall close to ground and the load current should be about 5 mA.
  • The threshold voltage describes the onset of conduction. Use the specified on-resistance at the actual gate drive to estimate load losses.

International Rectifier IRLB3034PbF, electrical characteristics. Supply, gate drive and resistors are fixture choices.

TO-220AB wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

TO-220AB
View from the marked face, with the tab above the body and leads 1–3 below from left to right. Scroll the map to reach all contacts.
Selected pin details

1 · G

Input · Control

Gate. Drive with the rated voltage relative to its own source.

International Rectifier IRLB3034PbF, TO-220AB outline and lead assignments

Electrical limits · Pin in the reference

Models and documents

TO-220AB. The mounting tab is electrically connected to the drain.

IRLB3034PBF
Infineon through-hole order code.