MPSA44RLRAG Equivalent & Substitute Parts

Part Overview

The MPSA44RLRAG is an NPN bipolar junction transistor manufactured by onsemi, rated for 400 V collector-emitter breakdown voltage and 300 mA maximum collector current in a Through Hole TO-92 package. This device is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain electrical performance across voltage, current, and thermal specifications while accommodating packaging and compliance variations.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	400	V
Current - Collector (Ic) (Max)	300	mA
Power - Max	625	mW
Vce Saturation (Max) @ Ib, Ic	750 mV @ 5 mA, 50 mA	—
Current - Collector Cutoff (Max)	500	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	50 @ 10 mA, 10 V	—
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-226-3, TO-92-3	—

Substitute Part Grouping Explanation

Substitute parts for the MPSA44RLRAG are qualified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution validity:

Electrical Parameters (Must Match):

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): 400 V
Current - Collector (Ic) (Max): 300 mA
Power - Max: 625 mW
Vce Saturation (Max) @ Ib, Ic: 750 mV @ 5 mA, 50 mA
Current - Collector Cutoff (Max): 500 nA
DC Current Gain (hFE) (Min) @ Ic, Vce: 50 @ 10 mA, 10 V

Mechanical Parameters (Must Match):

Mounting Type: Through Hole
Package / Case: TO-226-3 or TO-92-3

The substitute parts KSP44TA and KSP44TF meet all electrical specifications and package requirements. Both are manufactured by onsemi and maintain identical performance characteristics across the specified operating temperature range.

Parameter Comparison

Parameter	MPSA44RLRAG	KSP44TA	KSP44TF
Manufacturer	onsemi	onsemi	onsemi
Transistor Type	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	400 V	400 V	400 V
Current - Collector (Ic) (Max)	300 mA	300 mA	300 mA
Power - Max	625 mW	625 mW	625 mW
Vce Saturation (Max) @ Ib, Ic	750 mV @ 5 mA, 50 mA	750 mV @ 5 mA, 50 mA	750 mV @ 5 mA, 50 mA
Current - Collector Cutoff (Max)	500 nA	500 nA	500 nA
DC Current Gain (hFE) (Min) @ Ic, Vce	50 @ 10 mA, 10 V	50 @ 10 mA, 10 V	50 @ 10 mA, 10 V
Operating Temperature (TJ)	-55°C to 150°C	150°C	150°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-226-3, TO-92-3 Long Body	TO-226-3, TO-92-3	TO-226-3, TO-92-3
Product Status	Obsolete	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both KSP44TA and KSP44TF are direct electrical and mechanical equivalents to the MPSA44RLRAG. Selection between these two substitute parts is based on product status and compliance certifications:

KSP44TA and KSP44TF are both classified as Active products, ensuring long-term availability and supply chain continuity compared to the obsolete MPSA44RLRAG. Both substitute parts are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

The choice between KSP44TA and KSP44TF depends on packaging format requirements. KSP44TA is supplied in Cut Tape (CT) packaging, while KSP44TF is also supplied in Cut Tape (CT) packaging. Both maintain identical electrical specifications and through-hole mounting compatibility with the original MPSA44RLRAG footprint.

Frequently Asked Questions (FAQ)

Q: Can KSP44TA or KSP44TF be used as direct replacements for MPSA44RLRAG in existing designs?

A: Yes. Both KSP44TA and KSP44TF are direct electrical and mechanical equivalents. They maintain identical collector-emitter breakdown voltage (400 V), maximum collector current (300 mA), power dissipation (625 mW), saturation voltage, and DC current gain specifications. Through-hole mounting and TO-92-3 package compatibility ensure PCB footprint compatibility.

Q: What is the difference between KSP44TA and KSP44TF?

A: Both parts are electrically identical and manufactured by onsemi. The primary distinction is packaging format designation. Both are supplied in Cut Tape (CT) format and are ROHS3 Compliant. Selection between these parts should be based on supplier availability and internal part numbering conventions.

Q: Why is the MPSA44RLRAG classified as obsolete?

A: The MPSA44RLRAG is listed as obsolete by the manufacturer. KSP44TA and KSP44TF are active products with equivalent electrical and mechanical specifications, providing continuity for designs requiring this transistor type.

Q: Are there any thermal operating range differences between the main part and substitutes?

A: The MPSA44RLRAG specifies an operating temperature range of -55°C to 150°C. The substitute parts KSP44TA and KSP44TF specify a maximum junction temperature of 150°C. For applications requiring the full -55°C lower temperature limit, thermal performance at minimum operating temperature should be verified against specific application requirements.

Q: Do the substitute parts meet current regulatory compliance standards?

A: Yes. Both KSP44TA and KSP44TF are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution in regulated markets.

Q: Is the TO-92-3 package compatible with TO-226-3 footprints?

A: Yes. TO-92-3 and TO-226-3 designations refer to the same three-lead through-hole package configuration. All parts listed maintain mechanical compatibility with existing PCB designs using the MPSA44RLRAG.

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