MPSA92-AP Equivalent & Substitute Parts

Part Overview

The MPSA92-AP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. Specified for 300 V collector-emitter breakdown voltage and 300 mA maximum collector current, this device is packaged in a TO-92 through-hole configuration. The MPSA92-AP is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design support and procurement continuity. Active alternative parts meeting or exceeding the electrical and mechanical specifications are available to maintain circuit functionality.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Max)	300	mA
Collector-Emitter Breakdown Voltage (Max)	300	V
Power Dissipation (Max)	625	mW
Transition Frequency	50	MHz
Operating Temperature Range	−55 to 150	°C
Mounting Type	Through Hole	—
Package Type	TO-92	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MPSA92-AP is determined by strict adherence to the following electrical and mechanical parameters:

Mandatory Compatibility Criteria:

Transistor type must be PNP
Collector current rating must equal or exceed 300 mA
Collector-emitter breakdown voltage must equal or exceed 300 V
Mounting type must be through-hole
Package must be TO-92 or TO-92 compatible form factor
RoHS3 compliance required for regulatory alignment

The ZTX958STZ meets all mandatory criteria with enhanced electrical performance characteristics. This device provides higher current capacity (500 mA), elevated breakdown voltage (400 V), increased power dissipation capability (1.2 W), and superior transition frequency (85 MHz). The E-Line package is mechanically compatible with TO-92 footprints. Both parts maintain identical operating temperature floor (−55°C) with the substitute offering extended upper temperature capability (200°C versus 150°C).

Parameter Comparison

Parameter	MPSA92-AP	ZTX958STZ	Unit
Manufacturer	Micro Commercial Co	Diodes Incorporated	—
Product Status	Obsolete	Active	—
Transistor Type	PNP	PNP	—
Collector Current (Max)	300	500	mA
Collector-Emitter Breakdown Voltage (Max)	300	400	V
Vce Saturation (Max)	500 mV @ 2 mA, 20 mA	400 mV @ 100 mA, 500 mA	V
DC Current Gain (hFE Min)	80 @ 10 mA, 10 V	100 @ 500 mA, 10 V	—
Power Dissipation (Max)	625	1200	mW
Transition Frequency	50	85	MHz
Operating Temperature Range	−55 to 150	−55 to 200	°C
Mounting Type	Through Hole	Through Hole	—
Package / Case	TO-92-3	E-Line-3 (TO-92 compatible)	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	—
REACH Status	REACH Unaffected	REACH Unaffected	—

Engineering Selection Recommendations

The ZTX958STZ is a direct substitute for the obsolete MPSA92-AP in applications requiring PNP bipolar junction transistor functionality. Selection of the ZTX958STZ is supported by the following factors:

Product Status Alignment: The MPSA92-AP is classified as obsolete, creating supply chain risk. The ZTX958STZ maintains active product status with established manufacturing continuity.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and regulatory requirements.

Electrical Performance: The ZTX958STZ exceeds all minimum electrical specifications of the MPSA92-AP. Higher collector current capacity (500 mA versus 300 mA), elevated breakdown voltage (400 V versus 300 V), and increased power dissipation (1.2 W versus 625 mW) provide design margin in existing applications.

Mechanical Compatibility: The E-Line package is mechanically compatible with TO-92 through-hole footprints, enabling direct board-level substitution without layout modification.

Temperature Performance: Extended operating temperature range (−55 to 200°C versus −55 to 150°C) accommodates applications with elevated thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can the ZTX958STZ be used as a direct replacement for the MPSA92-AP on existing PCBs?

A: Yes. The ZTX958STZ E-Line package is mechanically compatible with TO-92 through-hole footprints. No PCB layout modification is required for physical substitution.

Q: What are the key electrical differences between these parts?

A: The ZTX958STZ provides higher collector current capacity (500 mA versus 300 mA), elevated breakdown voltage (400 V versus 300 V), increased power dissipation capability (1.2 W versus 625 mW), and superior transition frequency (85 MHz versus 50 MHz). These enhancements provide design margin without compromising circuit functionality.

Q: Are both parts RoHS compliant?

A: Yes. Both the MPSA92-AP and ZTX958STZ maintain ROHS3 compliance and REACH unaffected status.

Q: What is the operating temperature range for each part?

A: The MPSA92-AP operates from −55°C to 150°C. The ZTX958STZ operates from −55°C to 200°C, providing extended high-temperature capability.

Q: Why is the MPSA92-AP classified as obsolete?

A: The MPSA92-AP is no longer in active production. The ZTX958STZ is recommended for new designs and ongoing procurement to ensure supply chain continuity.

Q: Are there any package considerations when substituting these parts?

A: Both parts use through-hole mounting. The MPSA92-AP uses standard TO-92 packaging, while the ZTX958STZ uses E-Line packaging. E-Line is mechanically compatible with TO-92 footprints and requires no board modification.

Q: What is the moisture sensitivity level for both parts?

A: Both the MPSA92-AP and ZTX958STZ have a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.

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