MPS751G Equivalent & Substitute Parts

Part Overview

The MPS751G is a PNP bipolar junction transistor manufactured by onsemi, rated for 60V collector-emitter breakdown voltage and 2A maximum collector current. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. The MPS751G is housed in a TO-92 (TO-226-3) through-hole package and operates across a temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Maximum Collector Current (Ic)	2	A
Collector-Emitter Breakdown Voltage (Max)	60	V
Vce Saturation (Max)	500 mV @ 200mA, 2A	—
Collector Cutoff Current (ICBO)	100	nA
DC Current Gain (hFE Min)	75 @ 1A, 2V	—
Maximum Power Dissipation	625	mW
Transition Frequency	75	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package	TO-92-3 (TO-226-3)	—

Substitute Part Grouping Explanation

Substitution of the MPS751G is determined by electrical and mechanical parameter compatibility within the PNP bipolar transistor category. The critical parameters governing substitution are:

Transistor Type: PNP configuration
Maximum Collector Current: 2A minimum requirement
Collector-Emitter Breakdown Voltage: 60V minimum rating
Vce Saturation Characteristics: 500mV @ 200mA, 2A
Collector Cutoff Current: 100nA maximum
DC Current Gain (hFE): 75 minimum @ 1A, 2V
Power Dissipation: 625mW minimum
Mounting Type: Through Hole configuration
Package Compatibility: TO-92 or TO-92-compatible packages

Substitute parts are classified into two categories:

Direct Equivalent (MPS751): Identical electrical specifications and package designation, manufactured by Fairchild Semiconductor. This part maintains full parameter parity with the MPS751G.

Similar Substitute (ZTX751): Meets or exceeds all critical electrical parameters with enhanced performance characteristics (higher transition frequency and power rating) and extended temperature range. Package is E-Line format, which is mechanically compatible with TO-92 pinout requirements.

Parameter Comparison

Parameter	MPS751G (onsemi)	MPS751 (Fairchild)	ZTX751 (Diodes Inc.)
Transistor Type	PNP	PNP	PNP
Ic (Max)	2 A	2 A	2 A
Vce Breakdown (Max)	60 V	60 V	60 V
Vce Saturation (Max)	500 mV @ 200mA, 2A	500 mV @ 200mA, 2A	500 mV @ 200mA, 2A
ICBO (Max)	100 nA	100 nA	100 nA
hFE (Min)	75 @ 1A, 2V	75 @ 1A, 2V	Not specified
Power (Max)	625 mW	625 mW	1 W
Frequency - Transition	75 MHz	75 MHz	140 MHz
Operating Temperature	-55 to 150 °C	Up to 150 °C	-55 to 200 °C
Mounting Type	Through Hole	Through Hole	Through Hole
Package	TO-92-3 (TO-226-3)	TO-92-3 (TO-226AA)	E-Line (TO-92 compatible)
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

MPS751 (Fairchild Semiconductor) is the direct equivalent substitute for the MPS751G. This part is classified as active product status and maintains identical electrical specifications and package designation. Selection of MPS751 provides direct compatibility with existing designs without parameter deviation.

ZTX751 (Diodes Incorporated) is a functionally superior substitute that meets all critical electrical parameters of the MPS751G while providing enhanced performance margins. The ZTX751 offers increased power dissipation capability (1W versus 625mW), higher transition frequency (140MHz versus 75MHz), and extended maximum operating temperature (200°C versus 150°C). The E-Line package is mechanically compatible with TO-92 pinout configurations. This part is RoHS3 compliant and active product status.

Selection between MPS751 and ZTX751 depends on application requirements. MPS751 is appropriate for direct replacement in existing designs. ZTX751 is suitable for applications requiring enhanced thermal performance, higher frequency operation, or extended temperature range operation.

Frequently Asked Questions (FAQ)

Q: Can MPS751 directly replace MPS751G in existing circuit designs?

A: Yes. MPS751 manufactured by Fairchild Semiconductor is a direct equivalent with identical electrical specifications, saturation characteristics, current gain, and power rating. The TO-92-3 package is mechanically and electrically compatible with the original MPS751G TO-92-3 package.

Q: What are the advantages of using ZTX751 as a substitute?

A: ZTX751 provides three performance enhancements: increased power dissipation (1W versus 625mW), higher transition frequency (140MHz versus 75MHz), and extended operating temperature range (-55°C to 200°C versus -55°C to 150°C). These characteristics allow operation in higher-frequency applications and elevated temperature environments while maintaining all critical electrical parameters.

Q: Is the ZTX751 E-Line package compatible with TO-92 circuit board layouts?

A: Yes. The ZTX751 E-Line package is specified as TO-92 compatible, maintaining identical pinout and lead spacing for through-hole mounting on standard circuit boards designed for TO-92 components.

Q: What is the primary reason for substituting the MPS751G?

A: The MPS751G is classified as obsolete product status. MPS751 and ZTX751 are active products with established supply chains and ongoing manufacturing support.

Q: Are there compliance or certification differences between the substitute parts?

A: MPS751 carries EAR99 export classification. ZTX751 is RoHS3 compliant and carries EAR99 export classification. Both parts are REACH unaffected. Compliance requirements should be evaluated against specific application and regional regulations.

Q: Can ZTX751 be used in applications originally designed for MPS751G without circuit modifications?

A: Yes. ZTX751 meets or exceeds all electrical parameters specified for MPS751G operation. The enhanced performance characteristics (higher power rating, frequency, and temperature range) do not create incompatibility with existing circuit designs. Pin configuration and saturation characteristics are identical.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message