MPSA05_D74Z Equivalent & Substitute Parts

Part Overview

The MPSA05_D74Z is an NPN bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 500 mA, collector-emitter breakdown voltage of 60 V, and maximum power dissipation of 625 mW in a Through Hole TO-92-3 package.

The MPSA05_D74Z is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this transistor.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	500	mA
Voltage - Collector Emitter Breakdown (Max)	60	V
Vce Saturation (Max) @ Ib, Ic	250 mV @ 10 mA, 100 mA	—
Current - Collector Cutoff (Max)	100 nA	—
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 100 mA, 1 V	—
Power - Max	625	mW
Frequency - Transition	100	MHz
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-92-3 (TO-226AA)	—

Substitute Part Grouping Explanation

Substitution of the MPSA05_D74Z is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Parameters:

Transistor type (NPN)
Maximum collector current (500 mA)
Collector-emitter breakdown voltage (60 V)
Saturation voltage characteristics (250 mV @ 10 mA, 100 mA)
DC current gain minimum (100 @ 100 mA, 1 V)
Maximum power dissipation (625 mW)
Transition frequency (100 MHz)
Operating temperature range (-55°C to 150°C)

Mechanical Parameters:

Mounting type (Through Hole)
Package type (TO-92-3)

Substitute parts must match all specified electrical parameters and maintain the same physical package configuration to ensure direct replacement capability in existing circuit designs and PCB layouts.

Parameter Comparison

Parameter	MPSA05_D74Z	MPSA05RA	Match
Manufacturer	onsemi	onsemi	Yes
Transistor Type	NPN	NPN	Yes
Current - Collector (Ic) (Max)	500 mA	500 mA	Yes
Voltage - Collector Emitter Breakdown (Max)	60 V	60 V	Yes
Vce Saturation (Max) @ Ib, Ic	250 mV @ 10 mA, 100 mA	250 mV @ 10 mA, 100 mA	Yes
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 100 mA, 1 V	100 @ 100 mA, 1 V	Yes
Power - Max	625 mW	625 mW	Yes
Frequency - Transition	100 MHz	100 MHz	Yes
Operating Temperature	-55°C to 150°C (TJ)	-55°C to 150°C (TJ)	Yes
Mounting Type	Through Hole	Through Hole	Yes
Package / Case	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)	Yes
Product Status	Obsolete	Active	Functional Equivalent

Engineering Selection Recommendations

The MPSA05RA is a direct functional equivalent to the MPSA05_D74Z. Both devices are manufactured by onsemi and share identical electrical specifications and physical packaging.

Key Considerations:

Product Status: The MPSA05_D74Z is classified as obsolete, while the MPSA05RA maintains active product status. Selection of the MPSA05RA ensures access to current manufacturing, quality assurance processes, and ongoing supplier support.

Compliance and Certifications: The MPSA05RA is RoHS3 compliant and maintains REACH Unaffected status, consistent with modern regulatory requirements. Both parts carry EAR99 export classification and identical HTSUS coding.

Packaging Availability: The MPSA05RA is available in Cut Tape (CT) packaging, providing flexibility for automated assembly processes. The MPSA05_D74Z packaging format is not specified beyond the supplier device package designation.

Electrical Equivalence: All electrical parameters, including current ratings, voltage ratings, gain characteristics, and frequency response, are identical between the two parts. Direct substitution in existing circuit designs is supported without modification.

Frequently Asked Questions (FAQ)

Q: Can the MPSA05RA be used as a direct replacement for the MPSA05_D74Z?

A: Yes. The MPSA05RA is electrically and mechanically equivalent to the MPSA05_D74Z. All electrical specifications, including collector current, breakdown voltage, saturation voltage, current gain, power dissipation, and frequency response are identical. Both devices use the TO-92-3 package with formed leads.

Q: What is the primary reason to transition from MPSA05_D74Z to MPSA05RA?

A: The MPSA05_D74Z is classified as obsolete, while the MPSA05RA maintains active product status. Transitioning to the MPSA05RA ensures continued supply availability, access to current manufacturing processes, and compliance with modern quality and regulatory standards.

Q: Are there any differences in packaging between these parts?

A: Both parts use the TO-92-3 (TO-226AA) package with formed leads for Through Hole mounting. The MPSA05RA is supplied in Cut Tape (CT) packaging format, which is standard for automated assembly operations.

Q: Do both parts meet current regulatory requirements?

A: The MPSA05RA is RoHS3 compliant and REACH Unaffected. The MPSA05_D74Z regulatory status reflects its obsolete classification. For new designs or ongoing production requiring current compliance documentation, the MPSA05RA is the appropriate selection.

Q: Are the DC current gain characteristics identical?

A: Yes. Both parts specify a minimum DC current gain (hFE) of 100 measured at 100 mA collector current and 1 V collector-emitter voltage. Saturation voltage characteristics are also identical at 250 mV maximum under the specified test conditions.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. The identical TO-92-3 package configuration, pin assignment, and electrical specifications support direct substitution without PCB layout modifications or circuit redesign.

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