MPSA92 Equivalent & Substitute Parts

Part Overview

The MPSA92 is a PNP bipolar junction transistor (BJT) manufactured by onsemi, designed for small-signal switching and amplification applications. The device features a 300 V collector-emitter breakdown voltage, 500 mA maximum collector current, and 625 mW power dissipation rating in a Through Hole TO-92 package. The MPSA92 is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain electrical and mechanical compatibility across all critical parameters to ensure direct replacement capability.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	500	mA
Voltage - Collector Emitter Breakdown (Max)	300	V
Vce Saturation (Max) @ Ib, Ic	500 mV @ 2 mA, 20 mA	—
Current - Collector Cutoff (Max)	250	nA
DC Current Gain (hFE) Min @ Ic, Vce	25 @ 30 mA, 10 V	—
Power - Max	625	mW
Frequency - Transition	50	MHz
Mounting Type	Through Hole	—
Package / Case	TO-92-3 (TO-226)	—

Substitute Part Grouping Explanation

Substitute parts for the MPSA92 are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

Transistor Type: PNP
Current - Collector (Ic) Max: 500 mA
Voltage - Collector Emitter Breakdown (Max): 300 V
Vce Saturation (Max) @ Ib, Ic: 500 mV @ 2 mA, 20 mA
Current - Collector Cutoff (Max): 250 nA
DC Current Gain (hFE) Min @ Ic, Vce: 25 @ 30 mA, 10 V
Power - Max: 625 mW
Frequency - Transition: 50 MHz

Mechanical Parameters (Must Match):

Mounting Type: Through Hole
Package / Case: TO-92-3 (TO-226)

All identified substitute parts meet these requirements and are therefore electrically and mechanically interchangeable with the MPSA92 in applications where the specified parameters are required.

Parameter Comparison

Parameter	MPSA92 (onsemi)	KSP92BU (Fairchild)	MPSA92 PBFREE (Central Semiconductor)
Product Status	Obsolete	Active	Active
Transistor Type	PNP	PNP	PNP
Current - Collector (Ic) Max	500 mA	500 mA	500 mA
Voltage - Collector Emitter Breakdown (Max)	300 V	300 V	300 V
Vce Saturation (Max) @ Ib, Ic	500 mV @ 2 mA, 20 mA	500 mV @ 2 mA, 20 mA	500 mV @ 2 mA, 20 mA
Current - Collector Cutoff (Max)	250 nA	250 nA	250 nA
DC Current Gain (hFE) Min @ Ic, Vce	25 @ 30 mA, 10 V	25 @ 30 mA, 10 V	25 @ 30 mA, 10 V
Power - Max	625 mW	625 mW	625 mW
Frequency - Transition	50 MHz	50 MHz	50 MHz
Operating Temperature	-55°C ~ 150°C	150°C	-65°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3 (TO-226)	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)
RoHS Status	Non-compliant	Not specified	ROHS3 Compliant
ECCN	EAR99	EAR99	EAR99
HTSUS	8541.21.0095	8541.21.0095	8541.21.0095

Engineering Selection Recommendations

KSP92BU (Fairchild Semiconductor): The KSP92BU is an active product that meets all electrical and mechanical specifications of the MPSA92. This substitute is suitable for applications where the MPSA92 is no longer available. The KSP92BU maintains identical performance characteristics across all critical parameters. Selection of this part is appropriate for designs requiring an active equivalent from an alternative manufacturer.

MPSA92 PBFREE (Central Semiconductor Corp): The MPSA92 PBFREE is an active product that meets all electrical and mechanical specifications of the MPSA92 and carries ROHS3 compliance certification. This substitute maintains the base product number designation and is suitable for applications requiring RoHS-compliant components. The extended operating temperature range (-65°C ~ 150°C) provides additional thermal margin compared to the original MPSA92 specification. Selection of this part is appropriate for new designs subject to RoHS requirements or for applications requiring enhanced temperature performance.

Both substitute parts are electrically and mechanically interchangeable with the MPSA92 and require no circuit modifications for direct replacement.

Frequently Asked Questions (FAQ)

Q: Can the KSP92BU be used as a direct replacement for the MPSA92?

A: Yes. The KSP92BU meets all electrical parameters (Ic, Vce breakdown, saturation voltage, current gain, power rating, and transition frequency) and mechanical specifications (Through Hole TO-92-3 package) of the MPSA92. Direct substitution is possible without circuit modification.

Q: What is the difference between KSP92BU and MPSA92 PBFREE?

A: Both parts are electrically and mechanically equivalent to the MPSA92. The primary differences are: (1) MPSA92 PBFREE carries ROHS3 compliance certification while KSP92BU compliance status is not specified; (2) MPSA92 PBFREE has an extended operating temperature range of -65°C ~ 150°C compared to KSP92BU at 150°C maximum; (3) MPSA92 PBFREE retains the base product number designation.

Q: Is the MPSA92 PBFREE suitable for RoHS-compliant applications?

A: Yes. The MPSA92 PBFREE carries ROHS3 compliance certification and is suitable for applications subject to RoHS requirements. The original MPSA92 is RoHS non-compliant.

Q: Are there any package differences between the MPSA92 and its substitutes?

A: All three parts use the TO-92-3 (TO-226) Through Hole package. The MPSA92 is specified as TO-226-3, TO-92-3 Long Body, while KSP92BU and MPSA92 PBFREE are specified as TO-226-3, TO-92-3 (TO-226AA). These designations refer to the same physical package form factor and are mechanically compatible.

Q: Can these substitutes be used in high-temperature applications?

A: The MPSA92 PBFREE supports operation up to 150°C junction temperature with an extended lower temperature limit of -65°C, providing a wider operating range than the original MPSA92 (-55°C ~ 150°C). The KSP92BU is specified for 150°C maximum. Selection depends on specific application temperature requirements.

Q: What is the inventory status of these substitute parts?

A: KSP92BU has 105,400 pieces in stock. MPSA92 PBFREE has 8,547 pieces in stock. Both parts are available as active products from their respective manufacturers.

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