000A2

Manufacturer

PANJIT

Model

000A2

Category

semiconductor

›transistors

›Bipolar Junction Transistor (BJT)

The MMBT5551-AU_R1-000A2 is a compact NPN BJT optimized for low-power switching and amplification in 2V-5.5V systems. Its 160V VCEO and 600mA Ic rating support motor control and LED applications, while the 300MHz fT enables RF front-end circuits. Thermal management requires careful heat dissipation above 250mW, and soldering must avoid thermal overstress. The SOT-23 package provides space savings but limits current handling compared to larger packages. This component is ideal for cost-sensitive, high-density designs requiring stable DC gain and fast switching.

Reference Pricing

10+ :$0.0392

100+ :$0.0308

300+ :$0.028

Reference Stock

Available:Unknown

Specifications

Beta (β)	250
Cut-off Frequency (fT)	300MHz
Input Impedance	Not provided
Maximum Collector Current (Ic)	600mA
Maximum Collector Power Dissipation (Pc)	250mW
Maximum Collector Voltage (Vce)	160V
Operating Temperature Range	-55 to +150°C
Output Impedance	Not provided
Package Material	Not provided
Package Type	SOT-23
Power Dissipation	250mW
Rated Voltage	Not provided

Soldering	Use 260-280°C soldering temperature and 3-5 seconds per pad to prevent thermal damage
Current Limit	Max collector current: 600mA (exceedance causes thermal runaway)
Voltage Limit	Max VCEO: 160V (reverse bias breakdown protection required)
Thermal Management	Thermal resistance: 300°C/W (requires heat dissipation >250mW at 150°C)
Storage	Store in anti-static bags below 30°C and 10% humidity
Risk Warnings	Static discharge damage risk Overvoltage beyond 160V causes device failure Excessive power dissipation (>250mW) leads to thermal destruction

Layout	Keep trace lengths <5mm for high-frequency applications
Thermal	Use 0.5mm-thick copper pads for thermal coupling
Compatibility	Matches 2V-5.5V logic levels with 10mA base drive
Testing	Verify hFE stability with 100-hour burn-in testing

Strengths	Smallest SOT-23 package (2.8mm x 1.6mm) for space-constrained designs Cost-effective (unit price <$0.025 at 3000+ units) ROHS-compliant with lead-free soldering
Weaknesses	Limited to <=600mA continuous current Lower gain stability vs. medium-power BJTs No built-in protection diodes

000A2

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