MPSA56_D27Z Equivalent & Substitute Parts

Part Overview

The MPSA56_D27Z is a PNP bipolar junction transistor manufactured by onsemi, rated for 80 V collector-emitter breakdown voltage and 500 mA maximum collector current. This component is designed for general-purpose switching and amplification applications in through-hole TO-92-3 packaging. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	500	mA
Voltage - Collector Emitter Breakdown (Max)	80	V
Vce Saturation (Max)	200 mV @ 10 mA, 100 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min	100 @ 100 mA, 1 V	—
Power - Max	625	mW
Frequency - Transition	50	MHz
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-92-3	—

Substitute Part Grouping Explanation

Substitution of the MPSA56_D27Z is determined by strict equivalence across the following electrical and mechanical parameters:

Transistor Type: PNP configuration required
Current Rating: 500 mA maximum collector current
Voltage Rating: 80 V collector-emitter breakdown voltage
DC Current Gain: Minimum 100 hFE at specified test conditions
Power Dissipation: 625 mW maximum
Frequency Response: 50 MHz transition frequency
Temperature Range: -55°C to 150°C operating range
Package: TO-92-3 through-hole configuration with formed leads

The MPSA56-AP manufactured by Micro Commercial Co meets all specified electrical parameters and maintains identical package configuration, establishing it as a direct functional equivalent.

Parameter Comparison

Parameter	MPSA56_D27Z (onsemi)	MPSA56-AP (Micro Commercial Co)	Match Status
Transistor Type	PNP	PNP	Equivalent
Current - Collector (Ic) Max	500 mA	500 mA	Equivalent
Voltage - Collector Emitter Breakdown (Max)	80 V	80 V	Equivalent
Vce Saturation (Max)	200 mV @ 10 mA, 100 mA	250 mV @ 10 mA, 100 mA	Compatible
Current - Collector Cutoff (Max)	100 nA	100 nA	Equivalent
DC Current Gain (hFE) Min	100 @ 100 mA, 1 V	100 @ 100 mA, 1 V	Equivalent
Power - Max	625 mW	625 mW	Equivalent
Frequency - Transition	50 MHz	50 MHz	Equivalent
Operating Temperature Range	-55 to 150 °C (TJ)	-55 to 150 °C (TJ)	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	TO-92-3	TO-92-3	Equivalent

Engineering Selection Recommendations

The MPSA56-AP is a direct functional equivalent to the MPSA56_D27Z across all specified electrical and mechanical parameters. Both components are classified as obsolete products, indicating limited availability through standard distribution channels.

The MPSA56-AP carries RoHS3 compliance certification, whereas the MPSA56_D27Z compliance status is not specified in the provided data. Both components maintain REACH Unaffected status and identical ECCN and HTSUS classifications.

Selection between these parts should be based on current inventory availability and procurement lead times, as electrical performance and physical compatibility are equivalent. The Vce saturation specification difference (200 mV versus 250 mV) remains within acceptable tolerances for general-purpose switching applications and does not constitute a functional limitation.

Frequently Asked Questions (FAQ)

Q: Can the MPSA56-AP directly replace the MPSA56_D27Z in existing circuit designs?

A: Yes. The MPSA56-AP meets all specified electrical parameters and maintains identical TO-92-3 package configuration. Pin assignment and lead spacing are compatible with existing PCB layouts and through-hole assembly processes.

Q: What is the significance of the Vce saturation difference between these parts?

A: The MPSA56_D27Z specifies 200 mV maximum saturation voltage while the MPSA56-AP specifies 250 mV. This 50 mV difference is within normal manufacturing tolerance ranges for PNP transistors and does not affect circuit functionality in standard switching applications. Applications requiring precise saturation voltage control should evaluate this parameter against specific design requirements.

Q: Are there packaging differences between these parts?

A: Both components use TO-92-3 through-hole packaging with formed leads. The MPSA56_D27Z is supplied in standard packaging, while the MPSA56-AP is supplied in cut tape format. This difference affects only procurement and handling; the physical component dimensions and pin configuration are identical.

Q: What compliance certifications apply to these parts?

A: The MPSA56-AP carries RoHS3 compliance. Both components maintain REACH Unaffected status. Compliance requirements for specific applications should be evaluated against applicable regulatory standards.

Q: Why are both parts classified as obsolete?

A: Obsolete classification indicates these components are no longer in active production by their respective manufacturers. Existing inventory remains available through authorized distributors, but long-term procurement should consider alternative modern PNP transistor solutions for new designs.

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