ROHM MMST4403 datasheet specifications manual user guide
Summary
The SST4403 / MMST4403 is a reliable PNP medium power transistor designed for general switching applications. This comprehensive datasheet provides engineers with detailed electrical specifications, including breakdown voltages (up to -40V), saturation voltage, current gain (hFE), and transition frequency (fT). The manual covers operational parameters, timing characteristics (rise/fall time), package types, and performance curves needed for precise circuit design, making it essential for professionals developing reliable medium-power electronic systems.
Page 1 Text Content
SST4403 / MMST4403
Transistors
PNP Medium Power Transistor (Switching) SST4403 / MMST4403
Features Dimensions (Unit : mm)
1) BVCEO = −40V (Min.) ; at IC= −1m A
SST4403
2) Complements the SST4401 / MMST4401
(1) Emitter Package, marking, and packaging specifications (2) Base ROHM : SST3 (3) Collector
Part No. SST4403 MMST4403 Packaging type SST3 SMT3
MMST4403
Marking R2T R2T
Code T116 T146
Basic ordering unit (pieces)
(1) Emitter
ROHM : SMT3 (2) Base EIAJ : SC-59 (3) Collector
Absolute maximum ratings (Ta=25°C)
Parameter Symbol Limits Unit Collector-base voltage VCBO −40
Collector-emitter voltage VCEO −40 Emitter-base voltage VEBO −6 Collector current IC −0.6
Collector power
dissipation
Junction temperature Tj ˚C Storage temperature Tstg −55 to +150 ˚C
∗ Mounted on a 7 5 0.6mm CERAMIC SUBSTRATE+
Electrical characteristics (Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Collector-base breakdown voltage BVCBO −40 IC= −100µA
Collector-emitter breakdown voltage BVCEO −40 IC= −1m A Emitter-base breakdown voltage BVEBO −5 IE= −100µA Collector cutoff current ICBO −0.1 µA VCB= −35V Emitter cutoff current IEBO −0.1 µA VEB= −5V
−0.4 IC/IB= −150m A/ −15m A
Collector-emitter saturation voltage VCE(sat)
−0.75 IC/IB= −500m A/ −50m A
−0.75 −0.95 IC/IB= −150m A/ −15m A
Base-emitter saturation voltage VBE(sat)
−1.3 IC/IB= −500m A/ −50m A
VCE= −1V, IC= −0.1m A VCE= −1V, IC= −1m A DC current transfer ratio h FE VCE= −1V, IC= −10m A VCE= −1V, IC= −150m A VCE= −2V, IC= −500m A
Transition frequency f T MHz VCE= −10V, IE=20m A, f=100MHz Collector output capacitance Cob 8.5 p F VCB= −10V, f=100k Hz Emitter input capacitance Cib p F VEB= −0.5V, f=100k Hz Delay time td ns VCC= −30V, VEB(OFF)= −2V, IC= −150m A, IB1= −15m A
tr ns VCC= −30V, VEB(OFF)= −2V, IC= −150m A, IB1= −15m ARise time
Storage time tstg ns VCC= −30V, IC= −150m A, IB1= −IB2= −15m A
tf ns VCC= −30V, IC= −150m A, IB1= −IB2= −15m A Fall time
Rev.C 1/3
Page Summary Contents For ROHM MMST4403 datasheet specifications manual user guide
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 4 |
| File Size | 78.45 KB |
| Published | July 07, 2026 |
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Frequently Asked Questions
What is the appropriate mounting surface for these transistors?
They should be mounted on a 7 x 5 x 0.6mm CERAMIC SUBSTRATE.
What are the critical absolute maximum voltage ratings I must observe?
The limits specified are VCB O (−40V), VCEO (−40V), and VEBO (−6V).
How do I determine if this transistor is suitable for high-speed applications?
Check the Transition frequency (fT), which can reach 200–300 MHz, indicating its suitability for fast switching.
What cautions should be noted when using these components in safety or critical systems?
Always consult your sales representative and incorporate derating characteristics, extra margin, and fail-safe measures.