Skip to main content
Log in
Infineon Technologies BSS138IXTSA1 — Discrete Semiconductors

Infineon BSS138IXTSA1 N-Channel MOSFET, 60 V, 230 mA

MPNBSS138IXTSA1
Active

Infineon BSS138IXTSA1 N-Channel MOSFET, 60 V Vdss, 230 mA Id, 3.5 Ohm Rds(on) max at 10 V, 1.4 V Vgs(th) max, SOT-23-3 package, -55 to 150 °C operating temperature.

$0.4400Ref. price · indicative, final on quote
Infineon Technologies BSS138IXTSA1 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BSS138IXTSA1 specifications
ParameterValue
FET typeN-Channel
MountingSurface Mount
Drain to source voltage60 V
Drive voltage (Max rds on, min rds on)4.5V, 10V
Current - continuous drain (Id) @ 25°C230mA (Ta)
Power dissipation360mW (Ta)
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-236-3, SC-59, SOT-23-3
Vgs(th) (Max) @ id1.4V @ 26µA
Rds on (Max) @ id, vgs3.5Ohm @ 230mA, 10V
Gate charge (Qg) (Max) @ vgs1 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds32 pF @ 25 V

Product details

60 V, 230 mA N-channel small-signal switch

At 4.5 V drive (the minimum recommended drive voltage), expect the Rds(on) to roughly double — still acceptable for switching loads up to a few hundred milliamps. The gate charge is only 1 nC at 10 V, so the switching losses are negligible in low-frequency or level-shift applications.

SOT-23-3 — rework and footprint

The BSS138IXTSA1 comes in the standard SOT-23-3 (PG-SOT-23-3) package. It reworks cleanly with a hot-air station at 300 °C for a few seconds; the small thermal mass means it lifts and reflows without cooking the board. The footprint is the same as any generic SOT-23 N-channel, so it drops into existing layouts for BSS138-class parts.

Frequently asked questions

What is the Rds(on) of BSS138IXTSA1?

The maximum Rds(on) is 3.5 Ohm at 230 mA drain current with 10 V gate drive. At 4.5 V drive the on-resistance is higher but still suitable for low-current switching.

Is BSS138IXTSA1 a logic-level MOSFET?

Yes. The datasheet specifies drive voltages of 4.5 V and 10 V for minimum and maximum Rds(on).

Can BSS138IXTSA1 replace BSS138?

The BSS138IXTSA1 is an Infineon-specific variant of the industry-standard BSS138 N-channel MOSFET. It shares the same SOT-23-3 footprint, 60 V drain rating, and similar Rds(on) and threshold characteristics. In most low-side switching and level-shift circuits it is a drop-in replacement, but verify the gate charge and capacitance against your switching frequency if the original BSS138 was from another manufacturer.