MPSA56G Equivalent & Substitute Parts

Part Overview

The MPSA56G is a PNP bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features an 80 V collector-emitter breakdown voltage rating and a maximum collector current of 500 mA, housed in a Through Hole TO-92 package. The MPSA56G is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including voltage ratings, current capacity, gain characteristics, and thermal operating range.

Substiute Parts

MPSA56G

onsemiIn Stock: 17278MPSA56G Datasheet

Current PartRFQ

MMBTA56LT1G

onsemiIn Stock: 416120MMBTA56LT1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MPSA56G are identified based on strict electrical parameter equivalence. The primary substitution criterion is the maintenance of all critical electrical specifications: PNP transistor type, 80 V collector-emitter breakdown voltage, 500 mA maximum collector current, 250 mV saturation voltage at specified bias conditions, 100 nA maximum cutoff current, 100 minimum DC current gain at 100 mA and 1 V, 50 MHz transition frequency, and -55°C to 150°C operating temperature range.

The MMBTA56LT1G qualifies as an electrical equivalent substitute because it maintains all specified electrical parameters identically. The primary distinction between these parts is the mounting technology and package form factor: the MPSA56G uses Through Hole TO-92 packaging, while the MMBTA56LT1G uses Surface Mount SOT-23-3 packaging. This difference necessitates circuit board redesign and assembly process modification but does not affect electrical performance within the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The MMBTA56LT1G serves as the electrical equivalent substitute for the obsolete MPSA56G. Both devices maintain identical electrical performance across all specified parameters including voltage ratings, current capacity, gain characteristics, and thermal operating range.

Selection between these parts depends on circuit board design requirements and assembly capabilities. The MPSA56G Through Hole TO-92 package is suitable for through-hole assembly processes and breadboard prototyping. The MMBTA56LT1G Surface Mount SOT-23-3 package is suitable for surface mount assembly processes and compact board layouts.

The MMBTA56LT1G carries Active product status, ensuring ongoing availability and manufacturing support. The MPSA56G is classified as Obsolete, indicating discontinued production and limited future availability. The MMBTA56LT1G is RoHS3 Compliant, meeting current environmental and regulatory requirements. Both devices maintain REACH Unaffected status and EAR99 export classification.

Power dissipation differs between packages: the MPSA56G is rated at 625 mW maximum, while the MMBTA56LT1G is rated at 225 mW maximum. This difference reflects thermal characteristics of the respective package types. Circuit designs must ensure that actual power dissipation remains within the substitute part's 225 mW rating.

Frequently Asked Questions (FAQ)

Q: Can the MMBTA56LT1G directly replace the MPSA56G in existing circuit boards?

A: Electrical substitution is complete; however, physical replacement requires circuit board redesign. The MPSA56G uses Through Hole TO-92 packaging with three leads spaced for through-hole mounting. The MMBTA56LT1G uses Surface Mount SOT-23-3 packaging with different lead spacing and surface mount footprint. Direct socket substitution is not possible without board modification.

Q: Are the electrical characteristics identical between these parts?

A: Yes. Both devices maintain identical specifications for collector current (500 mA), collector-emitter breakdown voltage (80 V), saturation voltage (250 mV), cutoff current (100 nA), DC current gain (100 minimum), transition frequency (50 MHz), and operating temperature range (-55°C to 150°C).

Q: What is the significance of the different power ratings?

A: The MPSA56G is rated at 625 mW maximum power dissipation, while the MMBTA56LT1G is rated at 225 mW. This difference reflects the thermal characteristics of the respective package types. The TO-92 package provides greater thermal mass, while the SOT-23-3 package is more compact. Circuit designs must ensure actual power dissipation does not exceed 225 mW when using the MMBTA56LT1G substitute.

Q: Why is the MPSA56G classified as obsolete?

A: The MPSA56G is listed as obsolete by the manufacturer, indicating discontinued production. The MMBTA56LT1G represents the active equivalent in the onsemi product line, offering identical electrical performance with modern packaging and compliance certifications.

Q: What compliance certifications apply to the MMBTA56LT1G?

A: The MMBTA56LT1G is RoHS3 Compliant and maintains REACH Unaffected status. Both devices carry EAR99 export classification. Moisture Sensitivity Level is 1 (Unlimited) for both parts.

Q: Are there any other substitute options available?

A: Based on the provided input parameters, the MMBTA56LT1G is the identified substitute for the MPSA56G. No additional substitute parts are listed in the reference data.