MPS750RLRPG Equivalent & Substitute Parts

Part Overview

The MPS750RLRPG is a PNP bipolar junction transistor manufactured by onsemi, rated for 40 V collector-emitter breakdown voltage and 2 A maximum collector current. This device is packaged in a TO-92 through-hole configuration and is designed for general-purpose switching and amplification applications. The MPS750RLRPG is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, and thermal characteristics while accommodating the through-hole TO-92 package standard.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) (Max)	2	A
Voltage - Collector Emitter Breakdown (Max)	40	V
Power - Max	625	mW
Frequency - Transition	75	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3	—

Substitute Part Grouping Explanation

Substitution of the MPS750RLRPG is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Transistor polarity: PNP configuration required
Maximum collector current: 2 A minimum rating
Collector-emitter breakdown voltage: 40 V minimum rating
Package type: TO-92-3 through-hole configuration
Mounting compatibility: Through-hole lead formation

Acceptable Parameter Variations: Substitute parts may exceed the MPS750RLRPG specifications in the following areas without compromising circuit compatibility:

Collector-emitter breakdown voltage (higher ratings acceptable)
Maximum power dissipation (higher ratings acceptable)
Transition frequency (higher ratings acceptable)
DC current gain (hFE) (higher values acceptable)
Operating temperature maximum (higher ratings acceptable)

The KSA1281YTA meets all critical matching parameters and exceeds several performance specifications, establishing it as a direct functional substitute.

Parameter Comparison

Parameter	MPS750RLRPG	KSA1281YTA	Unit
Manufacturer	onsemi	Fairchild Semiconductor	—
Product Status	Obsolete	Active	—
Transistor Type	PNP	PNP	—
Current - Collector (Ic) (Max)	2	2	A
Voltage - Collector Emitter Breakdown (Max)	40	50	V
Vce Saturation (Max) @ Ib, Ic	500mV @ 200mA, 2A	500mV @ 50mA, 1A	—
Current - Collector Cutoff (Max)	100	100	nA
DC Current Gain (hFE) (Min)	75 @ 1A, 2V	120 @ 500mA, 2V	—
Power - Max	625	1000	mW
Frequency - Transition	75	100	MHz
Operating Temperature (Max)	150	150	°C
Mounting Type	Through Hole	Through Hole	—
Package / Case	TO-92-3	TO-92-3	—
ECCN	EAR99	EAR99	—

Engineering Selection Recommendations

The KSA1281YTA is a direct functional substitute for the obsolete MPS750RLRPG. Selection of the KSA1281YTA is supported by the following factors:

Product Status Alignment: The KSA1281YTA maintains active production status with Fairchild Semiconductor, ensuring long-term availability and supply chain continuity compared to the obsolete MPS750RLRPG.

Electrical Compatibility: The KSA1281YTA meets or exceeds all critical electrical parameters of the MPS750RLRPG. Maximum collector current (2 A), collector-emitter breakdown voltage (50 V, exceeding the 40 V requirement), and operating temperature range (150°C maximum) are fully compatible. The higher power rating (1 W versus 625 mW) and transition frequency (100 MHz versus 75 MHz) provide additional performance margin.

Package Compatibility: Both devices utilize the TO-92-3 through-hole package with formed leads, ensuring mechanical and thermal compatibility in existing PCB layouts without modification.

Regulatory Compliance: Both parts carry EAR99 export classification, maintaining equivalent compliance status for controlled applications.

Frequently Asked Questions (FAQ)

Q: Can the KSA1281YTA be used as a direct replacement for the MPS750RLRPG without circuit modification?

A: Yes. The KSA1281YTA is electrically and mechanically compatible with the MPS750RLRPG. Both devices are PNP transistors with identical maximum collector current (2 A), compatible voltage ratings (50 V versus 40 V), and identical TO-92-3 package configuration. No circuit redesign is required.

Q: What is the significance of the higher power rating (1 W) of the KSA1281YTA compared to the MPS750RLRPG (625 mW)?

A: The higher power rating of the KSA1281YTA provides additional thermal margin in applications operating near the MPS750RLRPG power limit. This does not require circuit modification but allows for improved reliability in thermally constrained environments.

Q: Are there any differences in DC current gain (hFE) between these devices that affect circuit operation?

A: The KSA1281YTA exhibits a higher minimum DC current gain (120 @ 500mA, 2V) compared to the MPS750RLRPG (75 @ 1A, 2V). This difference may result in slightly different base current requirements for equivalent collector current levels. Circuit designs with adequate base drive margin will not be affected.

Q: Do both devices support the same operating temperature range?

A: Both devices support a maximum junction temperature of 150°C. The MPS750RLRPG specifies a minimum operating temperature of -55°C, while the KSA1281YTA specification provided does not include a minimum temperature. Verify the KSA1281YTA datasheet for complete temperature range specifications if operation below 0°C is required.

Q: Is the TO-92-3 package identical between both devices?

A: Yes. Both the MPS750RLRPG and KSA1281YTA use the TO-92-3 long-body package with formed leads. Pin configuration and physical dimensions are compatible, allowing direct PCB footprint compatibility.

Q: What is the availability status of each device?

A: The MPS750RLRPG is classified as obsolete and has limited availability (695 pieces in stock). The KSA1281YTA is in active production with significantly higher availability (6735 pieces in stock), making it the preferred choice for new designs and ongoing production requirements.

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