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

Part Number	Description / PDF	Quantity
DMG964020R Panasonic	TRANS PREBIAS NPN/PNP SSMINI6	7255
RN2969(TE85L,F) Toshiba Electronic Devices and Storage Corporation	TRANS 2PNP PREBIAS 0.2W US6	3000
DCX144EH-7 Zetex Semiconductors (Diodes Inc.)	TRANS PREBIAS NPN/PNP SOT563	910
PIMD2,125 Nexperia	TRANS NPN/PNP PREBIAS 0.6W 6TSOP	0
DMG963H10R Panasonic	TRANS PREBIAS NPN/PNP SSMINI5	16000
EMG3T2R ROHM Semiconductor	TRANS 2NPN PREBIAS 0.15W EMT3	7990
FMA4AT148 ROHM Semiconductor	TRANS PREBIAS DUAL PNP SMT5	11088
SMUN5311DW1T3G Sanyo Semiconductor/ON Semiconductor	TRANS NPN/PNP PREBIAS SOT363	3729
RN2907FE,LF(CT Toshiba Electronic Devices and Storage Corporation	TRANS 2PNP PREBIAS 0.1W ES6	0
DMC2610E0R Panasonic	TRANS 2NPN PREBIAS 0.3W MINI5	2969
UMH4NTN ROHM Semiconductor	TRANS 2NPN PREBIAS 0.15W UMT6	4
PUMH18,115 Nexperia	TRANS 2NPN PREBIAS 0.3W 6TSSOP	0
EMA6DXV5T5G	SMALL SIGNAL BIPOLAR TRANSISTOR	40000
NSM21356DW6T1G	SMALL SIGNAL BIPOLAR TRANSISTOR	321000
DDA114EH-7 Zetex Semiconductors (Diodes Inc.)	TRANS 2PNP PREBIAS 0.15W SOT563	0
RN2507(TE85L,F) Toshiba Electronic Devices and Storage Corporation	TRANS 2PNP PREBIAS 0.3W SMV	2910
PEMD30,315 Nexperia	TRANS PREBIAS NPN/PNP SOT666	0
PRMH9Z Nexperia	TRANS PREBIAS 2NPN 50V DFN1412-6	3000
NSBA143TDXV6T1	SMALL SIGNAL BIPOLAR TRANSISTOR	36000
RN4989FE,LF(CT Toshiba Electronic Devices and Storage Corporation	NPN + PNP BRT Q1BSR47KOHM Q1BER2	7975

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