MPSA56_D74Z Equivalent & Substitute Parts

Part Overview

The MPSA56_D74Z 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 TO-92-3 through-hole package. The transistor operates across a temperature range of -55°C to 150°C and delivers a maximum power dissipation of 625 mW.

The MPSA56_D74Z is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy systems utilizing this component.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the MPSA56_D74Z is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Parameters:

Transistor polarity (PNP)
Maximum collector current (500 mA)
Collector-emitter breakdown voltage (80 V)
Maximum power dissipation (625 mW)
Transition frequency (50 MHz)
Minimum DC current gain (100 @ 100mA, 1V)
Operating temperature range (-55°C to 150°C)

Mechanical Parameters:

Mounting type (Through Hole)
Package classification (TO-92-3 or equivalent TO-226-3 variant)

The MPSA56-AP manufactured by Micro Commercial Co meets all specified electrical parameters and maintains mechanical compatibility through equivalent TO-92 packaging. Variations in saturation voltage characteristics remain within acceptable tolerance ranges for general-purpose applications and do not preclude functional substitution.

Parameter Comparison

Parameter	MPSA56_D74Z (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) @ Ib, Ic	200mV @ 10mA, 100mA	250mV @ 10mA, 100mA	Compatible
Current - Collector Cutoff (Max)	100 nA	100 nA	Equivalent
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 100mA, 1V	100 @ 100mA, 1V	Equivalent
Power - Max	625 mW	625 mW	Equivalent
Frequency - Transition	50 MHz	50 MHz	Equivalent
Operating Temperature Range	-55°C to 150°C	-55°C to 150°C	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	TO-92-3	TO-92-3	Equivalent

Engineering Selection Recommendations

MPSA56-AP (Micro Commercial Co) is the direct parametric equivalent for the MPSA56_D74Z. Both devices are classified as obsolete, indicating limited availability through standard distribution channels. The MPSA56-AP carries RoHS3 compliance certification, whereas the MPSA56_D74Z does not specify RoHS status. Both components maintain REACH Unaffected status and share identical ECCN and HTSUS classifications.

The saturation voltage differential (200 mV versus 250 mV at specified test conditions) represents a minor variance that does not compromise functional compatibility in standard switching applications. This difference may be relevant only in precision analog circuits requiring tight saturation specifications.

Selection between these parts should prioritize availability and supply chain considerations. The MPSA56-AP offers the advantage of RoHS3 compliance for applications subject to environmental regulations. Both devices are suitable for direct pin-for-pin replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the MPSA56-AP directly replace the MPSA56_D74Z in existing designs?

A: Yes. Both devices are electrically and mechanically equivalent across all critical parameters. Pin configuration, package footprint, and electrical ratings are identical. Direct substitution is supported without circuit modification.

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

A: The MPSA56_D74Z specifies 200 mV saturation voltage while the MPSA56-AP specifies 250 mV at identical test conditions (10 mA base current, 100 mA collector current). This 50 mV variance is typical among PNP transistor variants and does not affect performance in standard switching applications. Applications requiring saturation voltages below 250 mV should evaluate circuit margins independently.

Q: Are there packaging differences between these substitutes?

A: Both devices use TO-92-3 through-hole packaging with formed leads. The MPSA56_D74Z is supplied in standard packaging, while the MPSA56-AP is available in cut tape (CT) format. This difference affects only handling and assembly processes; the physical package and pin configuration remain identical.

Q: What compliance certifications apply to these parts?

A: Both devices are REACH Unaffected and share identical ECCN (EAR99) and HTSUS (8541.21.0095) classifications. The MPSA56-AP carries RoHS3 compliance certification. Both maintain Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling restrictions.

Q: Why is the MPSA56_D74Z classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured or actively supported by the original manufacturer. This classification necessitates identification of equivalent alternatives to maintain supply continuity for legacy systems and ongoing production requirements.

Q: Are there any thermal or frequency limitations when substituting these parts?

A: No. Both devices operate across the identical temperature range (-55°C to 150°C) and share the same transition frequency (50 MHz). Thermal and frequency performance characteristics are equivalent.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message