ROHM 2SAR544R User Guide
Summary
The 2SAR544R is a high-performance PNP Silicon epitaxial planar transistor designed for medium power switching applications (-80V / -2.5A). This datasheet provides comprehensive technical data, detailing absolute maximum ratings, electrical characteristics, and precise switching time parameters. It is essential documentation for electronics designers and engineers integrating the device into various equipment, including audio visual systems, communication devices, and general electronic appliances requiring reliable, high-speed power management components.
Page 1 Text Content
Midium Power Transistors (-80V / -2.5A) 2SAR544R
Structure Dimensions (Unit : mm) PNP Silicon epitaxial planar transistor TSMT3
1.0MAX
Features 2.9 0.85
1) Low saturation voltage, typically
VCE (sat) = -0.4V (Max.) (IC / IB= -1A / -50m A)
2) High speed switching (2)(1) 0.950.95
(1) Base
Applications
(2) Emitter
Abbreviated symbol : MS
(3) Collector
Driver
Packaging specifications Inner circuit (Unit : mm)
Package Taping Type Code TL Basic ordering unit (pieces)
2SAR544R
(1) Base (2) Emitter (3) Collector
Absolute maximum ratings (Ta = 25C)
Parameter Symbol Limits Unit
Collector-base voltage VCBO -80 Collector-emitter voltage VCEO -80
Emitter-base voltage VEBO -6
DC IC -2.5
Collector current
Pulsed ICP *1 -5 *2 PD 0.5
Power dissipation
*3 PD
Junction temperature Tj C Range of storage temperature Tstg -55 to 150 C *1 Pw=10ms, Single Pulse *2 Each terminal mounted on a recommended land. *3 Mounted on a ceramic board. (40x40x0.7mm³)
www.rohm.com
1/4 2010.02 - Rev.A
○c 2009 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For ROHM 2SAR544R User Guide
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 5 |
| File Size | 3.27 MB |
| Published | July 10, 2026 |
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Frequently Asked Questions
What is the typical saturation voltage (VCE(sat))?
The normal operating range for VCE(sat) is typically -200mV to -400mV.
Does this device support high-speed switching?
Yes, it features high-speed switching capabilities, as demonstrated by its transition frequency (f_T).
What are the absolute maximum ratings for power dissipation and temperature?
The maximum power dissipation is 0.5W at room temperature, with a junction temperature limit of 150°C.
Am I required to install safety measures when using this product?
Yes, it is crucial to implement safety measures like derating or redundant designs against potential failure.