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Infineon Technologies BTS70121EPAXUMA1 — Discrete Semiconductors

Infineon BTS70121EPAXUMA1 PROFET, 8.5A, 11.5mOhm

MPNBTS70121EPAXUMA1
End of Life

Infineon Technologies BTS70121EPAXUMA1, Automotive PROFET® high-side power switch, single-channel N-channel, 8.5A max output, 11.5mOhm typical Rds(on), PG-TSDSO-14-22 package, Tape & Reel.

$2.36Ref. price · indicative, final on quote
Infineon Technologies BTS70121EPAXUMA1 datasheet (PDF)
Packaging14-TSSOP (0.154", 3.90mm Width) Exposed Pad
RoHSROHS3 Compliant
SeriesAutomotive, AEC-Q100, PROFET®
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BTS70121EPAXUMA1 specifications
ParameterValue
SeriesAutomotive, AEC-Q100, PROFET®
Input typeNon-Inverting
Output typeN-Channel
TypeGeneral Purpose
MountingSurface Mount
Voltage - load6V ~ 18V
Voltage - supply (Vcc (Vdd))Not Required
Output current8.5A
I/O channels1
InterfaceOn/Off
Operating temperature-40°C ~ 150°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesSlew Rate Controlled
Rds on11.5mOhm
Case14-TSSOP (0.154\", 3.90mm Width) Exposed Pad
Fault protectionCurrent Limiting (Fixed), Open Load Detect, Over Temperature, Over Voltage, UVLO
Output configurationHigh Side
Ratio - Input:Output1:1

Product details

What the 11.5 mOhm Rds(on) means for the BOM

The BTS70121EPAXUMA1 is a single-channel high-side switch from Infineon's PROFET® family, qualified to AEC-Q100 for automotive-grade reliability. With a typical on-resistance of 11.5 mOhm and a maximum continuous output current of 8.5 A, it handles moderate loads like relays, solenoids, or LED modules in a 12 V automotive power distribution system. The 6 V to 18 V load supply range covers nominal 12 V systems with headroom for load-dump transients.

Fault protection set — what's covered

The device integrates fixed current limiting, open-load detection, over-temperature shutdown, over-voltage clamping, and undervoltage lockout (UVLO). This means a single BTS70121EPAXUMA1 replaces the discrete fuse + driver + diagnostic circuit in many automotive junction-box designs.

Package and board-fit for the layout engineer

The BTS70121EPAXUMA1 comes in a PG-TSDSO-14-22 package — a 14-lead TSSOP with an exposed pad (3.90 mm width).

Frequently asked questions

What is the BTS70121EPAXUMA1 used for?

It is a single-channel high-side power switch for automotive 12 V loads — relays, solenoids, motors, and lamps — with integrated fault protection and AEC-Q100 qualification.

What compliance documents does Infineon provide for this part?

The BTS70121EPAXUMA1 is ROHS3 Compliant per Infineon's lifecycle record. Standard Infineon documentation includes the datasheet, application notes, and PCN notifications.