ROHM QSX3 User Guide and Manual
Summary
This comprehensive data sheet details the QSX3 low-frequency amplifier transistor, an essential component for powering general electronic systems. Ideal for circuit designers and engineers in consumer electronics, audio-visual, or automation equipment. The manual provides exhaustive technical specifications, including absolute maximum ratings, detailed electrical curve graphs (e.g., DC current gain, saturation voltages), and performance characteristics necessary for reliable application design.
Page 1 Text Content
Transistors
Low frequency amplifier QSX3
Application External dimensions (Unit : mm)
Low frequency amplifier 2.8
Driver
Features
1pin mark 0.
1) A collector current is large. (6
2) VCE(sat) 250m V Each lead has same dimensions at lc=1.5A / l B=30m A
ROHM : TSMT6 Abbreviated symbol : X03 (3
Absolute maximum ratings (Ta=25°C) Equivalent circuit
Parameter Symbol Limits Unit
Collector-base voltage VCBO Collector-emitter voltage VCEO Emitter-base voltage VEBO IC
Collector current
Power dissipation PC
Junction temperature Tj °C Range of storage temperature Tstg −55 to +150 °C
∗1 Single pulse, Pw=1ms ∗2 Each Terminal Mounted on a Recommended ∗3 Mounted on a 25mm×25mm× 0.8mm Ceramic substratet
Electrical characteristics (Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Collector-base breakdown voltage BVCBO IC=10µA Collector-emitter breakdown voltage BVCEO IC=1m A BVEBO IE=10µAEmitter-base breakdown voltage ICBO n A VCB=15VCollector cutoff current IEBO n A VEB=6VEmitter cutoff current
VCE(sat) m V IC=1.5A, IB=30m ACollector-emitter saturation voltage
h FE VCE=2V, IC=500m ADC current gain
Transition frequency f T MHz VCE=2V, IE=−500m A, f=100MHz Cob p FCollector output capacitance VCB=10V, IE=0A, f=1MHz
∗ Pulse
Rev.A 1/2
Page Summary Contents For ROHM QSX3 User Guide and Manual
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 3 |
| File Size | 62.65 KB |
| Published | July 12, 2026 |
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Frequently Asked Questions
What is the recommended mounting substrate for this transistor?
It should be mounted on a 25mm×25mm×0.8mm Ceramic substrate.
Can I use the QSX3 in life-critical equipment like medical instruments?
You must consult your sales representative if using it in equipment where malfunction would directly endanger human life.
What is the maximum transition frequency (fT)?
The datasheet lists the Transition frequency (fT) as -360 MHz under specified test conditions.
How do I identify the leads or pins on the device?
The transistor features a 1pin mark, and all leads are stated to have the same dimensions.