MPSA56RLRAG Equivalent & Substitute Parts

Part Overview

The MPSA56RLRAG is a PNP bipolar junction transistor manufactured by onsemi, rated for 80 V collector-emitter breakdown voltage and 500 mA maximum collector current. The device is packaged in a through-hole TO-92 (TO-226-3) configuration with a maximum power dissipation of 625 mW and transition frequency of 50 MHz. The MPSA56RLRAG is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain electrical equivalence across critical parameters including voltage ratings, current capacity, gain characteristics, and thermal operating range while accommodating different packaging technologies.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector-Emitter Breakdown Voltage (Max)	80	V
Collector Current (Max)	500	mA
Power Dissipation (Max)	625	mW
DC Current Gain (hFE Min) @ Ic, Vce	100 @ 100mA, 1V	—
Vce Saturation (Max) @ Ib, Ic	250mV @ 10mA, 100mA	—
Transition Frequency	50	MHz
Operating Temperature Range	-55 to 150	°C
Collector Cutoff Current (Max)	100	nA

Substitute Part Grouping Explanation

Substitute parts for the MPSA56RLRAG are selected based on strict electrical parameter equivalence. All substitute candidates must satisfy the following criteria:

Electrical Equivalence Requirements:

Transistor type: PNP
Collector-emitter breakdown voltage: 80 V (maximum)
Collector current rating: 500 mA (maximum)
DC current gain (hFE): minimum 100 @ 100mA, 1V
Vce saturation: 250mV @ 10mA, 100mA
Transition frequency: 50 MHz
Operating temperature range: -55°C to 150°C
Collector cutoff current: 100 nA (maximum)

Packaging Considerations: Substitutes are grouped into two categories: through-hole TO-92 equivalents (direct pin-compatible replacements) and surface-mount SOT-23-3 alternatives (requiring circuit board redesign). Both categories maintain identical electrical specifications but differ in mounting technology and power dissipation ratings.

Parameter Comparison

Parameter	MPSA56RLRAG (onsemi)	MPSA56-AP (MCC)	MMBTA56LT1G (onsemi)
Transistor Type	PNP	PNP	PNP
Collector-Emitter Breakdown Voltage (Max)	80 V	80 V	80 V
Collector Current (Max)	500 mA	500 mA	500 mA
Power Dissipation (Max)	625 mW	625 mW	225 mW
DC Current Gain (hFE Min) @ Ic, Vce	100 @ 100mA, 1V	100 @ 100mA, 1V	100 @ 100mA, 1V
Vce Saturation (Max) @ Ib, Ic	250mV @ 10mA, 100mA	250mV @ 10mA, 100mA	250mV @ 10mA, 100mA
Transition Frequency	50 MHz	50 MHz	50 MHz
Operating Temperature Range	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Collector Cutoff Current (Max)	100 nA	100 nA	100 nA
Mounting Type	Through Hole	Through Hole	Surface Mount
Package / Case	TO-92-3 (TO-226)	TO-92-3 (TO-226AA)	SOT-23-3 (TO-236)
Product Status	Obsolete	Obsolete	Active

Engineering Selection Recommendations

Through-Hole TO-92 Substitutes:

MPSA56-AP (Micro Commercial Co) is a direct through-hole equivalent to MPSA56RLRAG. Both devices share identical electrical specifications, TO-92 packaging, and 625 mW power dissipation. MPSA56-AP is classified as obsolete but maintains full electrical compatibility. This substitute is appropriate for applications requiring pin-for-pin replacement without circuit board modification.

Surface-Mount SOT-23-3 Substitute:

MMBTA56LT1G (onsemi) is an active-status surface-mount alternative with identical electrical characteristics across all critical parameters. The primary difference is packaging technology (SOT-23-3 versus TO-92) and reduced power dissipation rating (225 mW versus 625 mW). MMBTA56LT1G is RoHS3 compliant and carries active product status, providing superior long-term availability. This substitute requires circuit board redesign to accommodate surface-mount footprint and is suitable for new designs or board revisions where power dissipation does not exceed 225 mW.

Compliance and Availability:

All three parts carry REACH Unaffected status and EAR99 ECCN classification. MMBTA56LT1G offers the highest inventory availability (416,100 pieces) and active product status, making it the preferred choice for new production programs. MPSA56-AP provides through-hole compatibility for legacy board support.

Frequently Asked Questions (FAQ)

Q: Can MMBTA56LT1G replace MPSA56RLRAG in existing through-hole designs?

A: No. MMBTA56LT1G uses SOT-23-3 surface-mount packaging, which is not compatible with through-hole PCB footprints. Circuit board redesign is required. For through-hole applications, use MPSA56-AP.

Q: What is the primary difference between MPSA56RLRAG and MMBTA56LT1G?

A: Electrical specifications are identical. The differences are packaging technology (through-hole TO-92 versus surface-mount SOT-23-3) and power dissipation rating (625 mW versus 225 mW). MMBTA56LT1G is active-status with higher inventory availability.

Q: Is MPSA56-AP suitable for new production designs?

A: MPSA56-AP is classified as obsolete. While electrically equivalent to MPSA56RLRAG, it offers limited long-term availability. For new designs, MMBTA56LT1G is recommended due to active product status and superior supply chain support.

Q: Can I use MMBTA56LT1G in applications with power dissipation exceeding 225 mW?

A: No. MMBTA56LT1G is rated for maximum 225 mW power dissipation. Applications requiring higher power dissipation must use MPSA56RLRAG or MPSA56-AP (both rated 625 mW).

Q: Are all three parts electrically interchangeable in terms of DC current gain and saturation voltage?

A: Yes. All three parts meet identical specifications for DC current gain (hFE minimum 100 @ 100mA, 1V) and Vce saturation (250mV @ 10mA, 100mA). Electrical interchangeability is confirmed across these parameters.

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

A: All three parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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