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Infineon Technologies BSP129L6906
Infineon Technologies

Infineon BSP129L6906 SIPMOS N-Ch Depletion MOSFET, 240V, 6Ω

MPNBSP129L6906
End of Life

Infineon SIPMOS® series, N-Channel Depletion Mode MOSFET, 240V Vdss, 6Ohm Rds(on) at 350mA, 10V, PG-SOT223-4 surface mount, -55°C to 150°C.

$0.29Ref. price · indicative, final on quote
BSP129L6906 datasheet
PackagingTO-261-4, TO-261AA
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
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Specifications

BSP129L6906 Technical Specifications
ParameterValue
SeriesSIPMOS®
FET typeN-Channel
Mounting typeSurface Mount
Drain to source voltage240 V
Drive voltage (Max rds on, min rds on)0V, 10V
Current - continuous drain (Id) @ 25°C350mA (Ta)
Power dissipation1.8W (Ta)
Operating temperature-55°C ~ 150°C (TJ)
PackageBulk
Vgs±20V
TechnologyMOSFET (Metal Oxide)
FET featureDepletion Mode
CaseTO-261-4, TO-261AA
Vgs(th) (Max) @ id1V @ 108µA
Rds on (Max) @ id, vgs6Ohm @ 350mA, 10V
Gate charge (Qg) (Max) @ vgs5.7 nC @ 5 V
Input capacitance (Ciss) (Max) @ vds108 pF @ 25 V

Product details

Depletion-mode MOSFET — what it means for the circuit

The Infineon BSP129L6906 is an N-channel depletion-mode power MOSFET from the SIPMOS® family. Unlike the more common enhancement-mode FET, this part conducts with zero gate-source voltage and requires a negative Vgs to turn off. That makes it a natural choice for normally-on current sources, cascode stages, or start-up circuits where you need conduction until the controller takes over.

6 Ω Rds(on) at 10 V — the real conduction loss

The 6 Ω maximum on-resistance is specified at 350 mA drain current with 10 V on the gate.

Gate charge and switching speed

The 5.7 nC typical gate charge at 5 V is low enough that a small-signal gate driver or even a microcontroller GPIO can switch it at moderate frequencies.

Lifecycle and sourcing posture

The BSP129L6906 carries an Active lifecycle status from Infineon and is ROHS3 compliant. It remains a current-production part suitable for new designs.

Frequently asked questions

What is the gate charge of BSP129L6906?

Typical gate charge is 5.7 nC at 5 V gate-source voltage.