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 packageCheck that the switch is off
RequiredUse 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
- G (1)
- RPD.1
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
- G (1)
- RPD.1
- RG.2
- Drive
- Gate-driver output
- RG.1
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
TO-220AB
TAB · D
Metal tab connected to D internally. Include its net when laying out the footprint.
Models and documents
TO-220AB. The mounting tab is electrically connected to the drain.
- IRLB3034PBF
- Infineon through-hole order code.
- International Rectifier IRLB3034PbF· Pin assignment, absolute maximum ratings, static characteristics and package outline.
- Source register· Document revisions, applicable order codes, consulted sections and available file checksums.