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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.

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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

Page 1 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 / MMS...
Page 2 IN h F SST4403 / MMST4403 BA SE -E IT TE AT AT IO LT AG : V BE (s at ) ( V) LL IC (m Transistors Electrical characteristic curves Ta=25˚C Ta=25˚C VCE=10V 0.1 101.0 100 1000 IN h F IN h F COLLECTOR-EMI...
Page 3 SST4403 / MMST4403 IT p F -E IT LT (o n) (V IM ts (n s) Transistors Ta=25˚C Ta=25˚C Ta=25˚C 1.6 VCE=10V VCE=10V 100MHz 1.4 300MHz 200MHz 0.8 250MHz 200MHz 0B 10C LL IM tf (n s) 0.1C IM to (n s) EN AI ...
Page 4 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject...

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.