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PBSS4021NT
20 V, 4.3 A NPN low VCEsat (BISS) transistor
Rev. 01 -- 31 January 2010 Product data sheet




1. Product profile

1.1 General description
NPN low VCEsat Breakthrough In Small Signal (BISS) transistor in a SOT23 (TO-236AB)
small Surface-Mounted Device (SMD) plastic package.

PNP complement: PBSS4021PT.

1.2 Features
Very low collector-emitter saturation voltage VCEsat
High collector current capability IC and ICM
High collector current gain (hFE) at high IC
High energy efficiency due to less heat generation
AEC-Q101 qualified
Smaller required Printed-Circuit Board (PCB) area than for conventional transistors

1.3 Applications
Loadswitch
Battery-driven devices
Power management
Charging circuits
Power switches (e.g. motors, fans)

1.4 Quick reference data
Table 1. Quick reference data
Symbol Parameter Conditions Min Typ Max Unit
VCEO collector-emitter voltage open base - - 20 V
IC collector current - - 4.3 A
ICM peak collector current single pulse; - - 8 A
tp 1 ms
RCEsat collector-emitter IC = 4 A; [1] - 36 50 m
saturation resistance IB = 400 mA

[1] Pulse test: tp 300 s; 0.02.
NXP Semiconductors PBSS4021NT
20 V, 4.3 A NPN low VCEsat (BISS) transistor



2. Pinning information
Table 2. Pinning
Pin Description Simplified outline Graphic symbol
1 base
3 3
2 emitter
3 collector 1
1 2
2
sym021




3. Ordering information
Table 3. Ordering information
Type number Package
Name Description Version
PBSS4021NT - plastic surface-mounted package; 3 leads SOT23


4. Marking
Table 4. Marking codes
Type number Marking code[1]
PBSS4021NT *BH

[1] * = -: made in Hong Kong
* = p: made in Hong Kong
* = t: made in Malaysia
* = W: made in China


5. Limiting values
Table 5. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Conditions Min Max Unit
VCBO collector-base voltage open emitter - 20 V
VCEO collector-emitter voltage open base - 20 V
VEBO emitter-base voltage open collector - 5 V
IC collector current - 4.3 A
ICM peak collector current single pulse; - 8 A
tp 1 ms
IB base current - 1 A




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