UMC4NTR from ROHM, in a SOT-353. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	DTr2_B	input	Base input of DTr2 (PNP, DTA114Y-equivalent) through internal 10kΩ series resistor R1. 47kΩ R2 sits between base and emitter. Absolute-max VIN = −40V / +6V.
2	DTr2_E	passive	Emitter of DTr2 (PNP). Typically connected to VCC (positive supply) in a high-side switch topology. Absolute-max VCC = −50V.
3	DTr1_B	input	Base input of DTr1 (NPN, DTC114E-equivalent) through internal 47kΩ series resistor R1. 47kΩ R2 sits between base and emitter (R2/R1 ≈ 1). Absolute-max VIN = +40V / −10V.
4	DTr1_E	passive	Emitter of DTr1 (NPN). Typically connected to GND in a low-side switch topology.
5	DTr1_C/DTr2_C	output	Collector output. In dual DTR packages such as UMC4N the two collectors are frequently brought out on a shared or adjacent pin; check ROHM's specific UMC4N pinout for whether pin 5 is DTr1 collector only, DTr2 collector only, or common. Absolute-max IO/IC ≈ 100mA.

Key specifications

Parameter	Value
Manufacturer	ROHM
Package	SOT-353
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

UMC4NTR
UMC4NTREMC4T2R
UMC4NTRFMC4AT148

CAD (KiCad official)

Symbol: UMC4NTR
Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
3D model: SOT-353 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`umc4ntr.step`	87 KB	You want the bare part, or you mark your own boards.
`umc4ntr-etched.step`	1.3 MB	You want the part with `UMC4NTR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 331 faces against 102 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: ROHM datasheet (3 pp, sha256 1297e7ec9f8c13b4, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF