2SAR542PT100

ROHM Semicon · Bipolar (BJT) · SOT-89

2SAR542PT100 from ROHM Semicon, in a SOT-89. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	Base	input	Base terminal of the PNP transistor; the datasheet gives VEBO of -6V, and VCE(sat) of -0.4V max at IC/IB = -2A/-100mA.
2	Collector	passive	Collector terminal (also the tab on the SOT-89 body); the datasheet gives VCBO of -30V, VCEO of -30V, IC of -5.0A DC and ICP of -10A pulsed.
3	Emitter	passive	Emitter terminal of the PNP transistor; the datasheet gives VEBO of -6V.

Key specifications

Parameter	Value
Manufacturer	ROHM Semicon
Package	SOT-89
Category	Transistors/Thyristors
Pins	3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Collector-base voltage	VCBO			-30	V		1
Collector-emitter voltage	VCEO			-30	V		1
Emitter-base voltage	VEBO			-6	V		1
Collector current DC	IC			-5	A		1
Collector current pulsed	ICP			-10	A	Pw=10ms, single pulse (*1)	1
Power dissipation	PD			0.5	W	Each terminal mounted on a reference land (*2)	1
Power dissipation	PD			2	W	Mounted on a ceramic board (40x40x0.7mm) (*3)	1
Junction temperature	Tj			150	°C		1
Range of storage temperature	Tstg	-55		150	°C		1
Collector-emitter breakdown voltage	BVCEO	-30			V	IC = -1mA	2
Emitter-base breakdown voltage	BVEBO	-6			V	IE = -100mA	2
Collector-base breakdown voltage	BVCBO	-30			V	IC = -100mA	2
Emitter cut-off current	IEBO			-1	mA	VEB = -4V	2
Collector cut-off current	ICBO			-1		VCB = -30V	2
DC current gain	hFE	200		500	-	VCE = -2V, IC = -500mA	2
Collector-emitter saturation voltage	VCE(sat)		-0.2	-0.4	V	IC = -2A, IB = -100mA, pulsed (*1)	2

CAD (KiCad official)

Symbol: 2SAR542PT100
Footprint: Package_TO_SOT_SMD:SOT-89-3
3D model: SOT-89 (KiCad packages3D, STEP)
3D model files: 2sar542pt100-etched.step / 2sar542pt100-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 2sar542pt100.step / 2sar542pt100.glb are the bare package body.

Provenance

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

Datasheet: ROHM Semicon datasheet (7 pp, sha256 e516360c04019527, retrieved 2026-10-18, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

# 2SAR542PT100

**ROHM Semicon** · Bipolar (BJT) · SOT-89

2SAR542PT100 from ROHM Semicon, in a SOT-89. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Base | input | Base terminal of the PNP transistor; the datasheet gives VEBO of -6V, and VCE(sat) of -0.4V max at IC/IB = -2A/-100mA. |
| 2 | Collector | passive | Collector terminal (also the tab on the SOT-89 body); the datasheet gives VCBO of -30V, VCEO of -30V, IC of -5.0A DC and ICP of -10A pulsed. |
| 3 | Emitter | passive | Emitter terminal of the PNP transistor; the datasheet gives VEBO of -6V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| Package | SOT-89 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Collector-base voltage | VCBO |  |  | -30 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | -30 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | -6 | V |  | 1 |
| Collector current DC | IC |  |  | -5 | A |  | 1 |
| Collector current pulsed | ICP |  |  | -10 | A | Pw=10ms, single pulse (*1) | 1 |
| Power dissipation | PD |  |  | 0.5 | W | Each terminal mounted on a reference land (*2) | 1 |
| Power dissipation | PD |  |  | 2 | W | Mounted on a ceramic board (40x40x0.7mm) (*3) | 1 |
| Junction temperature | Tj |  |  | 150 | °C |  | 1 |
| Range of storage temperature | Tstg | -55 |  | 150 | °C |  | 1 |
| Collector-emitter breakdown voltage | BVCEO | -30 |  |  | V | IC = -1mA | 2 |
| Emitter-base breakdown voltage | BVEBO | -6 |  |  | V | IE = -100mA | 2 |
| Collector-base breakdown voltage | BVCBO | -30 |  |  | V | IC = -100mA | 2 |
| Emitter cut-off current | IEBO |  |  | -1 | mA | VEB = -4V | 2 |
| Collector cut-off current | ICBO |  |  | -1 |  | VCB = -30V | 2 |
| DC current gain | hFE | 200 |  | 500 | - | VCE = -2V, IC = -500mA | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  | -0.2 | -0.4 | V | IC = -2A, IB = -100mA, pulsed (*1) | 2 |

## CAD (KiCad official)

- Symbol: `2SAR542PT100`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `2sar542pt100-etched.step` / `2sar542pt100-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sar542pt100.step` / `2sar542pt100.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ROHM Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586204356034613248) (7 pp, sha256 `e516360c04019527`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/2sar542pt100-datasheet.pdf)