MPS8099G Equivalent & Substitute Parts

Part Overview

The MPS8099G is an NPN bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features an 80 V collector-emitter breakdown voltage rating and 500 mA maximum collector current in a Through Hole TO-92 package. The MPS8099G is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating different packaging technologies.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Ic) Maximum	500	mA
Collector-Emitter Breakdown Voltage (Max)	80	V
Power Dissipation (Max)	625	mW
Transition Frequency	150	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package	TO-92-3	—

Substitute Part Grouping Explanation

Substitution eligibility for the MPS8099G is determined by the following electrical and mechanical criteria:

Electrical Compatibility Requirements:

Collector current rating must equal or exceed 500 mA
Collector-emitter breakdown voltage must equal or exceed 80 V
DC current gain (hFE) minimum must be 100 or greater
Collector cutoff current must not exceed 100 nA
Operating temperature range must encompass -55°C to 150°C

Mechanical Compatibility Requirements:

Transistor type must be NPN
Package must be compatible with TO-92 footprint or equivalent surface mount alternative

Substitute parts are grouped into two categories:

Direct Through-Hole Substitutes: Parts maintaining TO-92 mounting technology with identical or superior electrical specifications
Surface Mount Alternatives: Parts with equivalent electrical performance in surface mount packaging for redesigned applications

All substitute parts listed meet the minimum electrical requirements and are available in active product status or equivalent inventory conditions.

Parameter Comparison

Parameter	MPS8099G	MMBT8099LT1G	MPSA06	MPSA06RA
Manufacturer	onsemi	onsemi	Fairchild Semiconductor	onsemi
Transistor Type	NPN	NPN	NPN	NPN
Ic (Max)	500 mA	500 mA	500 mA	500 mA
Vce Breakdown (Max)	80 V	80 V	80 V	80 V
Power (Max)	625 mW	225 mW	625 mW	625 mW
Frequency - Transition	150 MHz	150 MHz	100 MHz	100 MHz
Operating Temperature	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C
Mounting Type	Through Hole	Surface Mount	Through Hole	Through Hole
Package	TO-92-3	SOT-23-3	TO-92	TO-92-3
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

For Through-Hole Applications:

MPSA06RA (onsemi) and MPSA06 (Fairchild Semiconductor) are direct substitutes for the MPS8099G in through-hole circuit designs. Both parts maintain the TO-92 package configuration and meet all electrical specifications. MPSA06RA carries RoHS3 compliance certification, making it suitable for applications requiring environmental compliance. The transition frequency of 100 MHz in these parts is lower than the MPS8099G's 150 MHz specification; however, this does not restrict substitution in applications where the original 150 MHz rating was not a critical design parameter.

For Surface Mount Redesigns:

MMBT8099LT1G (onsemi) provides electrical equivalence in a surface mount SOT-23-3 package. This part maintains the 150 MHz transition frequency and 80 V breakdown voltage of the original MPS8099G. The maximum power dissipation is reduced to 225 mW compared to the original 625 mW; thermal design review is required for applications approaching the original power rating. MMBT8099LT1G is classified as active product status with RoHS3 compliance.

Compliance Considerations:

All substitute parts are REACH Unaffected and classified under ECCN EAR99. MPSA06RA and MMBT8099LT1G carry RoHS3 compliance certification for regulated markets.

Frequently Asked Questions (FAQ)

Q: Can MPSA06 or MPSA06RA be used as direct replacements for MPS8099G in existing through-hole PCB designs?

A: Yes. Both MPSA06 and MPSA06RA maintain TO-92 package compatibility and meet the electrical requirements of the MPS8099G. No PCB layout modifications are required. The 100 MHz transition frequency of these parts is lower than the original 150 MHz; verify that your application does not depend on the higher frequency specification.

Q: What is the primary difference between MPSA06 and MPSA06RA?

A: MPSA06RA is manufactured by onsemi and carries RoHS3 compliance certification. MPSA06 is manufactured by Fairchild Semiconductor. Both parts are electrically equivalent and use TO-92 packaging. MPSA06RA is supplied in Cut Tape format, while MPSA06 is supplied in Bulk packaging.

Q: Is MMBT8099LT1G suitable for applications requiring the full 625 mW power rating of the MPS8099G?

A: MMBT8099LT1G has a maximum power dissipation rating of 225 mW, which is lower than the original 625 mW. Applications requiring sustained power dissipation above 225 mW must use through-hole alternatives (MPSA06 or MPSA06RA). Thermal analysis is required for applications operating near the 225 mW limit in surface mount designs.

Q: Are all substitute parts available in active product status?

A: Yes. MMBT8099LT1G, MPSA06, and MPSA06RA are all classified as active products. The original MPS8099G is obsolete, making these substitutes necessary for new production and design continuity.

Q: What packaging formats are available for each substitute part?

A: MMBT8099LT1G is supplied in Tape & Reel format for surface mount assembly. MPSA06RA is supplied in Cut Tape format. MPSA06 is supplied in Bulk format. Select the packaging format that matches your procurement and assembly requirements.

Q: Do all substitute parts support the full -55°C to 150°C operating temperature range?

A: Yes. All substitute parts (MMBT8099LT1G, MPSA06, and MPSA06RA) support the complete -55°C to 150°C operating temperature range specified for the original MPS8099G.

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