Transistors - Bipolar (BJT) - Arrays, Pre-Biased

Part Number	Description / PDF	Quantity
EMA6DXV5T1	SMALL SIGNAL BIPOLAR TRANSISTOR	76000
DDC122LU-7-F Zetex Semiconductors (Diodes Inc.)	TRANS 2NPN PREBIAS 0.2W SOT363	0
SMUN5314DW1T1G Sanyo Semiconductor/ON Semiconductor	TRANS PREBIAS 1NPN 1PNP 50V SC88	2147483647
RN4981FE,LF(CT Toshiba Electronic Devices and Storage Corporation	TRANS NPN/PNP PREBIAS 0.1W ES6	0
DMG214010R Panasonic	TRANS PNP PREBIAS/NPN 0.3W MINI6	5930
NHUMD13F Nexperia	NHUMD13/SOT363/SC-88	10000
EMF5T2R ROHM Semiconductor	TRANS NPN PREBIAS/PNP 0.15W EMT6	8168
MUN5333DW1T1G Sanyo Semiconductor/ON Semiconductor	TRANS PREBIAS 1NPN 1PNP 50V SC88	7479
DMC561010R Panasonic	TRANS 2NPN PREBIAS 0.15W SMINI5	40
UMH4NFHATN ROHM Semiconductor	NPN+NPN DIGITAL TRANSISTOR (CORR	3000
NSBC114EPDXV6T1G Sanyo Semiconductor/ON Semiconductor	TRANS PREBIAS NPN/PNP 50V SOT563	7624
DMC5640L0R Panasonic	TRANS PREBIAS DUAL NPN SMINI6	8657
RN4902,LF(CT Toshiba Electronic Devices and Storage Corporation	TRANS NPN/PNP PREBIAS 0.2W US6	2760
NSBC143ZPDXV6T1	SMALL SIGNAL BIPOLAR TRANSISTOR	92000
RN1965FE(TE85L,F) Toshiba Electronic Devices and Storage Corporation	TRANS 2PNP PREBIAS 0.1W ES6	176
RN4905T5LFT Toshiba Electronic Devices and Storage Corporation	TRANS NPN/PNP PREBIAS 0.2W US6	2375
UMD2NFHATR ROHM Semiconductor	PNP+NPN DIGITAL TRANSISTOR (WITH	2650
EMH1T2R ROHM Semiconductor	TRANS 2NPN PREBIAS 0.15W EMT6	6867
NSBA124EDP6T5G Sanyo Semiconductor/ON Semiconductor	TRANS PREBIAS 2PNP 50V SOT963	0
ADC143ZUQ-7 Zetex Semiconductors (Diodes Inc.)	PREBIAS TRANSISTOR SOT363 T&R 3K	75000

Transistors - Bipolar (BJT) - Arrays, Pre-Biased

1. Overview

Pre-biased Bipolar Junction Transistor (BJT) arrays integrate multiple transistors with built-in bias resistors in a single package. These devices simplify circuit design by eliminating external resistor networks, reducing PCB footprint, and ensuring stable operation. They play a critical role in modern electronics for signal amplification, switching, and logic functions in applications ranging from consumer electronics to industrial automation.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
NPN Arrays	Common-emitter configuration with integrated base resistors for switching	Digital logic circuits, relay drivers
PNP Arrays	Negative voltage switching with matched resistor ratios	Motor control, battery management
Complementary Pairs	Matched NPN/PNP transistors for push-pull amplifiers	Audio amplifiers, power supplies
Darlington Arrays	High current gain ( ) through cascaded transistor pairs	High-current switching in automotive systems

3. Structure and Composition

Pre-biased BJT arrays typically use silicon epitaxial planar technology. The structure includes:

Dielectric Isolation: Silicon dioxide layers separate individual transistors
Integrated Resistors: Laser-trimmed thin-film resistors set bias points
Package: Standard SOT-26, SOT-89, or SOP-8 plastic packages
Protection Diodes: Built-in ESD protection networks

4. Key Technical Specifications

Parameter	Description	Importance
hFE (Current Gain)	Ratio of collector to base current	Determines amplification capability
VCEO (Max Voltage)	Max voltage between collector and emitter	Limits operating voltage range
Ic (Max Current)	Maximum collector current rating	Defines power handling capability
fT (Transition Frequency)	Frequency at which gain drops to unity	Indicates high-frequency performance
VCE(sat)	Collector-emitter saturation voltage	Affects power efficiency

5. Application Areas

Main industries and typical equipment:

Consumer Electronics: Mobile phones, LED displays, home appliances
Industrial Control: PLCs, motor drivers, sensor interfaces
Automotive: ECU systems, LED lighting drivers, infotainment systems
Telecom: Base station power amplifiers, optical transceivers

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Specifications
ON Semiconductor	MBT3946DW1T5G	100mA Ic, 40V VCEO, 100MHz fT
Nexperia	PMBT2369EAR	Dual NPN array, 300mA total current
STMicroelectronics	SMUN2232T	PNP+Schottky diode array, 100mA
Infineon	IPAR10L3M06	Automotive-grade Darlington array

7. Selection Recommendations

Key considerations during component selection:

Match VCEO/Ic ratings with circuit requirements
Select appropriate hFE for desired gain
Consider thermal resistance for power applications
Evaluate package size vs. current density
Verify temperature stability (-40 C to +150 C)

8. Industry Trends

Future development directions include:

Higher integration levels (e.g., 8-transistor arrays in TSSOP)
Wide bandgap materials (SiC/GaN BJT hybrids)
Micron-scale packaging (0.4mm pitch QFN)
Smart power arrays with integrated protection circuits
Reduced parasitic capacitance for >5GHz RF applications