MPS751RLRPG Equivalent & Substitute Parts

Part Overview

The MPS751RLRPG is a PNP bipolar junction transistor manufactured by onsemi, rated for 60 V collector-emitter breakdown voltage and 2 A maximum collector current. This device is packaged in TO-92-3 (TO-226) through-hole configuration and is designed for general-purpose switching and amplification applications. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain electrical compatibility across voltage, current, and thermal operating ranges while preserving the through-hole TO-92-3 package format.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	60	V
Current - Collector (Ic) (Max)	2	A
Power - Max	625	mW
Vce Saturation (Max) @ Ib, Ic	500mV @ 200mA, 2A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	75 @ 1A, 2V	—
Frequency - Transition	75	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-226-3, TO-92-3	—

Substitute Part Grouping Explanation

Substitution of the MPS751RLRPG is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Direct Equivalents):

Transistor Type: PNP
Voltage - Collector Emitter Breakdown (Max): ≥ 60 V
Current - Collector (Ic) (Max): ≥ 2 A
Power - Max: ≥ 625 mW
Package / Case: TO-226-3 or TO-92-3 through-hole
Mounting Type: Through Hole

Secondary Substitution Criteria (Functional Alternatives):

Voltage - Collector Emitter Breakdown (Max): ≥ 60 V
Current - Collector (Ic) (Max): ≥ 0.6 A (reduced current capability acceptable for lower-current applications)
Power - Max: ≥ 500 mW
Package / Case: TO-226-3 or TO-92-3 through-hole
Mounting Type: Through Hole

Parts are grouped as follows:

Group 1 - Direct Equivalents (Full Current Rating): Parts maintaining 2 A collector current rating with 60 V breakdown voltage.

Group 2 - Functional Alternatives (Reduced Current Rating): Parts with reduced collector current ratings (0.6 A to 0.8 A) but maintaining 60 V or higher breakdown voltage, suitable for applications not requiring full 2 A current capacity.

Group 3 - Limited Alternatives (Reduced Voltage Rating): Parts with 65 V breakdown voltage and 100 mA collector current, applicable only to circuits with lower current demands and compatible with the higher voltage margin.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max)	Vce Breakdown (Max)	Power (Max)	Frequency (Transition)	Operating Temp	Package
MPS751RLRPG	onsemi	Obsolete	2 A	60 V	625 mW	75 MHz	-55 to 150°C	TO-92-3
MPS751	Fairchild Semiconductor	Active	2 A	60 V	625 mW	75 MHz	-55 to 150°C	TO-92-3
MPS751-D26Z	onsemi	Active	2 A	60 V	625 mW	75 MHz	-55 to 150°C	TO-92-3
PN2907ATA	onsemi	Active	800 mA	60 V	625 mW	200 MHz	-55 to 150°C	TO-92-3
PN2907ATF	Fairchild Semiconductor	Active	800 mA	60 V	625 mW	200 MHz	-55 to 150°C	TO-92-3
PN2907ATFR	onsemi	Active	800 mA	60 V	625 mW	200 MHz	-55 to 150°C	TO-92-3
KSP2907ATA	Fairchild Semiconductor	Active	600 mA	60 V	625 mW	200 MHz	-55 to 150°C	TO-92-3
BC556ATA	onsemi	Last Time Buy	100 mA	65 V	500 mW	150 MHz	-55 to 150°C	TO-92-3
BC556BTA	Fairchild Semiconductor	Active	100 mA	65 V	500 mW	150 MHz	-55 to 150°C	TO-92-3
BC556BTFR	Fairchild Semiconductor	Active	100 mA	65 V	500 mW	150 MHz	-55 to 150°C	TO-92-3

Engineering Selection Recommendations

Group 1 - Direct Equivalents (Recommended for Full Current Applications):

MPS751 (Fairchild Semiconductor) and MPS751-D26Z (onsemi) are direct functional equivalents to the obsolete MPS751RLRPG. Both parts maintain identical electrical specifications: 2 A maximum collector current, 60 V collector-emitter breakdown voltage, 625 mW power dissipation, and 75 MHz transition frequency. Both are classified as Active products, ensuring long-term availability and supply chain stability. MPS751-D26Z is supplied in Cut Tape (CT) packaging with RoHS3 compliance and higher inventory availability (35,200 units). MPS751 from Fairchild Semiconductor is supplied in bulk packaging. Selection between these two should be based on packaging format requirements and supply chain preferences.

Group 2 - Functional Alternatives (Recommended for Reduced Current Applications):

PN2907ATA, PN2907ATF, and PN2907ATFR are suitable substitutes for applications requiring collector currents up to 800 mA. These parts maintain the 60 V collector-emitter breakdown voltage and 625 mW power rating of the original part while offering enhanced transition frequency (200 MHz versus 75 MHz). All three are classified as Active products. PN2907ATA (onsemi, Cut Tape) and PN2907ATFR (onsemi, Cut Tape) provide RoHS3 compliance. PN2907ATF (Fairchild Semiconductor, Bulk) offers the highest inventory availability (56,113 units). These parts are suitable for circuits where the full 2 A current capability is not required.

KSP2907ATA (Fairchild Semiconductor) provides an intermediate option with 600 mA maximum collector current, 60 V breakdown voltage, and 200 MHz transition frequency. This part is classified as Active and offers 17,400 units in inventory.

Group 3 - Limited Alternatives (Conditional Use Only):

BC556ATA, BC556BTA, and BC556BTFR are limited alternatives suitable only for low-current applications (100 mA maximum). These parts feature 65 V collector-emitter breakdown voltage (5 V higher than the original specification) and reduced power rating (500 mW). BC556ATA is classified as Last Time Buy, indicating discontinued production. BC556BTA and BC556BTFR are Active products. These substitutes are applicable only to circuits with maximum current requirements below 100 mA and are not recommended for general replacement of the MPS751RLRPG in full-current applications.

Frequently Asked Questions (FAQ)

Q1: Can MPS751-D26Z directly replace MPS751RLRPG in all applications?

A: Yes. MPS751-D26Z maintains identical electrical specifications to MPS751RLRPG: 2 A maximum collector current, 60 V collector-emitter breakdown voltage, 625 mW power dissipation, and 75 MHz transition frequency. Both use TO-92-3 through-hole packaging. MPS751-D26Z is an Active product with confirmed long-term availability, whereas MPS751RLRPG is obsolete.

Q2: What is the difference between MPS751 and MPS751-D26Z?

A: Both parts are electrically identical with matching specifications. The primary difference is packaging format: MPS751 is supplied in bulk packaging, while MPS751-D26Z is supplied in Cut Tape (CT) format. MPS751-D26Z includes RoHS3 compliance certification. Selection depends on assembly process requirements and supply chain preferences.

Q3: Can PN2907ATA replace MPS751RLRPG?

A: PN2907ATA is a functional alternative suitable for applications not requiring the full 2 A collector current rating. PN2907ATA is rated for 800 mA maximum collector current compared to 2 A for MPS751RLRPG. Both maintain 60 V collector-emitter breakdown voltage and 625 mW power dissipation. PN2907ATA offers higher transition frequency (200 MHz versus 75 MHz). Use PN2907ATA only in circuits where collector current does not exceed 800 mA.

Q4: Why are BC556 series parts listed as alternatives?

A: BC556 series parts (BC556ATA, BC556BTA, BC556BTFR) are included as limited alternatives for low-current applications only. These parts are rated for maximum 100 mA collector current, significantly lower than the 2 A rating of MPS751RLRPG. BC556 parts feature 65 V collector-emitter breakdown voltage and 500 mW power dissipation. These substitutes are applicable only to circuits with maximum current requirements below 100 mA and should not be used as general replacements.

Q5: What is the significance of "Last Time Buy" status for BC556ATA?

A: "Last Time Buy" status indicates that BC556ATA production has been discontinued and remaining inventory represents the final available stock. This part should not be selected for new designs or long-term production requirements. BC556BTA and BC556BTFR, both classified as Active, are preferred alternatives if BC556 series functionality is required.

Q6: Are all substitute parts compatible with the TO-92-3 package footprint?

A: Yes. All listed substitute parts use TO-226-3 or TO-92-3 through-hole packaging with identical lead configurations and spacing. Physical board-level compatibility is maintained across all substitutes. Verify specific lead forming requirements (straight versus formed leads) with component datasheets if automated insertion equipment is used.

Q7: What is the impact of transition frequency differences between MPS751RLRPG and PN2907 series?

A: MPS751RLRPG is rated for 75 MHz transition frequency, while PN2907 series parts are rated for 200 MHz. Higher transition frequency indicates faster switching capability. In applications operating below 75 MHz, this difference has no functional impact. In high-frequency switching applications, the higher transition frequency of PN2907 series provides additional performance margin. Verify circuit operating frequency requirements before substitution.

Q8: Which substitute part offers the best long-term supply availability?

A: PN2907ATF (Fairchild Semiconductor) offers the highest inventory availability at 56,113 units in stock. MPS751-D26Z (onsemi) provides 35,200 units. Both are classified as Active products with confirmed production status. For critical applications requiring maximum supply security, PN2907ATF is the preferred choice.

Q9: Do all substitute parts meet RoHS3 compliance?

A: RoHS3 compliance is confirmed for MPS751-D26Z, PN2907ATA, and PN2907ATFR. MPS751 (Fairchild Semiconductor) does not list RoHS3 status in provided specifications. BC556 series parts do not list RoHS3 compliance. Verify RoHS3 requirements with specific application standards before final part selection.

Q10: Can KSP2907ATA be used as a general replacement for MPS751RLRPG?

A: KSP2907ATA is a functional alternative for applications requiring collector currents up to 600 mA. It maintains 60 V collector-emitter breakdown voltage and 625 mW power dissipation while offering 200 MHz transition frequency. KSP2907ATA is not suitable for applications requiring the full 2 A collector current rating of MPS751RLRPG. Use only in circuits where maximum collector current does not exceed 600 mA.

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