MPSA13_D74Z Equivalent & Substitute Parts

Part Overview

The MPSA13_D74Z is an NPN Darlington bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 1.2 A, collector-emitter breakdown voltage of 30 V, and maximum power dissipation of 625 mW in a Through Hole TO-92-3 package. The MPSA13_D74Z is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Darlington	—
Current - Collector (Ic) (Max)	1.2	A
Voltage - Collector Emitter Breakdown (Max)	30	V
Vce Saturation (Max) @ Ib, Ic	1.5V @ 100µA, 100mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	10000 @ 100mA, 5V	—
Power - Max	625	mW
Frequency - Transition	125	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the MPSA13_D74Z is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Transistor Type: NPN - Darlington configuration
Voltage - Collector Emitter Breakdown (Max): 30 V minimum
Package / Case: TO-92-3 Through Hole
Mounting Type: Through Hole
DC Current Gain (hFE): 10000 minimum @ 100mA, 5V
Vce Saturation: 1.5V @ 100µA, 100mA
Current - Collector Cutoff (Max): 100nA maximum

Flexible Parameters (Application-Dependent):

Current - Collector (Ic) (Max): Substitute must meet or exceed application requirements
Power - Max: 625 mW or greater
Frequency - Transition: 125 MHz or greater
Operating Temperature Range: Must encompass application operating conditions

The KSP13TA qualifies as a substitute for applications requiring collector current up to 500 mA. Applications requiring the full 1.2 A capability of the MPSA13_D74Z require verification that the substitute part current rating meets design specifications.

Parameter Comparison

Parameter	MPSA13_D74Z	KSP13TA	Match Status
Transistor Type	NPN - Darlington	NPN - Darlington	Equivalent
Current - Collector (Ic) (Max)	1.2 A	500 mA	Substitute Lower
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	Equivalent
Vce Saturation (Max) @ Ib, Ic	1.5V @ 100µA, 100mA	1.5V @ 100µA, 100mA	Equivalent
Current - Collector Cutoff (Max)	100 nA	100 nA	Equivalent
DC Current Gain (hFE) (Min) @ Ic, Vce	10000 @ 100mA, 5V	10000 @ 100mA, 5V	Equivalent
Power - Max	625 mW	625 mW	Equivalent
Frequency - Transition	125 MHz	125 MHz	Equivalent
Operating Temperature Range	-55 to 150°C	Up to 150°C	Substitute Limited
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	TO-92-3	TO-92-3	Equivalent
Product Status	Obsolete	Active	Substitute Active

Engineering Selection Recommendations

MPSA13_D74Z (Original Part): The MPSA13_D74Z is classified as obsolete. Continued procurement of this part number is not recommended for new designs or long-term production planning. Existing inventory is available (853 Pcs), suitable only for maintenance, repair, or completion of existing production runs with confirmed end-of-life status.

KSP13TA (Substitute Part): The KSP13TA is an active product manufactured by onsemi and qualifies as a direct substitute for applications operating within 500 mA collector current specifications. This part maintains electrical equivalence across all critical parameters including transistor type, voltage rating, saturation characteristics, current gain, power dissipation, and transition frequency. The KSP13TA is RoHS3 Compliant and REACH Unaffected, meeting current regulatory requirements. Inventory availability is higher (1873 Pcs), supporting production continuity.

Selection Criteria:

For applications requiring collector current ≤ 500 mA: KSP13TA is suitable
For applications requiring collector current > 500 mA: KSP13TA does not meet specifications; alternative parts outside the provided substitute list must be evaluated
For low-temperature operation below -55°C: KSP13TA operating temperature range does not extend to -55°C; application requirements must be verified

Frequently Asked Questions (FAQ)

Q: Can the KSP13TA directly replace the MPSA13_D74Z in all applications?

A: The KSP13TA is electrically equivalent to the MPSA13_D74Z for applications operating at collector currents up to 500 mA. The MPSA13_D74Z supports 1.2 A maximum collector current. Applications requiring collector current between 500 mA and 1.2 A cannot use the KSP13TA as a substitute. Verify your application's actual collector current requirement before substitution.

Q: Are the packages physically identical?

A: Both the MPSA13_D74Z and KSP13TA use the TO-92-3 Through Hole package with formed leads. Physical dimensions and pin configurations are identical, permitting direct board-level substitution without layout modifications.

Q: What is the difference in operating temperature range?

A: The MPSA13_D74Z operates from -55°C to 150°C. The KSP13TA operating temperature range extends to 150°C but does not specify a lower limit of -55°C. Applications requiring operation below -55°C must confirm KSP13TA suitability or identify alternative parts.

Q: Why is the MPSA13_D74Z obsolete?

A: The MPSA13_D74Z is classified as obsolete by the manufacturer. The KSP13TA represents the active product line continuation. For new designs and ongoing production, the KSP13TA is the recommended part selection.

Q: Are there compliance differences between these parts?

A: The MPSA13_D74Z lists REACH Unaffected status. The KSP13TA is RoHS3 Compliant and REACH Unaffected, meeting current regulatory standards. Both parts carry EAR99 ECCN classification and identical HTSUS codes.

Q: What is the difference in packaging format?

A: The MPSA13_D74Z is supplied in standard packaging. The KSP13TA is supplied in Cut Tape (CT) format, which is standard for high-volume production environments. This does not affect electrical performance or physical compatibility.

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