MPSW05 Equivalent & Substitute Parts

Part Overview

The MPSW05 is an NPN bipolar junction transistor manufactured by onsemi, housed in a TO-92 through-hole package. This device is rated for 60 V collector-emitter breakdown voltage and 500 mA maximum collector current, with a maximum power dissipation of 1 W. The MPSW05 is classified as obsolete, necessitating identification of active substitute components for new designs and ongoing production requirements. Equivalent parts must maintain functional compatibility within the specified electrical and mechanical parameters while offering active product status and current availability.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	60	V
Current - Collector (Ic) (Max)	500	mA
Power - Max	1	W
Frequency - Transition	50	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3	—

Substitute Part Grouping Explanation

Substitution of the MPSW05 is constrained by the following critical parameters: NPN transistor type, TO-92 through-hole package compatibility, and operating temperature range of -55°C to 150°C. The primary limitation for direct substitution is the 60 V collector-emitter breakdown voltage specification. Substitute parts identified in this reference operate at reduced voltage ratings (40 V maximum), which restricts their use to applications where the circuit design operates below 40 V. The 500 mA collector current and 1 W power dissipation requirements further narrow the field of suitable alternatives. Substitutes must maintain the same through-hole mounting configuration and compatible package dimensions to ensure mechanical fit in existing PCB layouts.

Parameter Comparison

Parameter	MPSW05	2N3904BU	2N4401BU
Transistor Type	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	60 V	40 V	40 V
Current - Collector (Ic) (Max)	500 mA	200 mA	600 mA
Vce Saturation (Max)	400 mV @ 10 mA, 250 mA	300 mV @ 5 mA, 50 mA	750 mV @ 50 mA, 500 mA
DC Current Gain (hFE) (Min)	60 @ 250 mA, 1 V	100 @ 10 mA, 1 V	100 @ 150 mA, 1 V
Power - Max	1 W	625 mW	625 mW
Frequency - Transition	50 MHz	300 MHz	250 MHz
Operating Temperature Range	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92-3
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The MPSW05 is an obsolete component, and both identified substitutes (2N3904BU and 2N4401BU) are active products with current manufacturing status. Both substitutes are ROHS3 compliant, addressing regulatory requirements for new designs and production environments subject to RoHS directives.

2N3904BU is suitable for applications requiring lower collector current (200 mA maximum) and lower power dissipation (625 mW). This device offers higher transition frequency (300 MHz) and lower saturation voltage, making it appropriate for signal amplification and switching applications operating below 40 V.

2N4401BU accommodates higher collector current (600 mA maximum) while maintaining the same 625 mW power rating and 40 V voltage limitation. This device provides better current handling capability for applications requiring higher current levels within the reduced voltage constraint.

Selection between substitutes depends on circuit voltage requirements. Applications operating at voltages exceeding 40 V cannot use either substitute without circuit redesign. For circuits operating below 40 V, the choice between 2N3904BU and 2N4401BU is determined by collector current requirements and saturation voltage characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 2N3904BU or 2N4401BU directly replace the MPSW05 in all applications?

A: No. Both substitutes are rated for 40 V maximum collector-emitter breakdown voltage, compared to the MPSW05 rating of 60 V. Direct substitution is limited to circuits operating below 40 V. Applications requiring 60 V operation cannot use these substitutes without circuit modification.

Q: What is the primary difference between the 2N3904BU and 2N4401BU substitutes?

A: The 2N3904BU is rated for 200 mA maximum collector current, while the 2N4401BU is rated for 600 mA. Both devices share the same 40 V voltage rating, 625 mW power dissipation, and TO-92-3 package. Selection depends on the collector current requirements of the application.

Q: Are the substitute parts physically compatible with the MPSW05 PCB layout?

A: Yes. Both 2N3904BU and 2N4401BU use the TO-92-3 package, which is mechanically compatible with the MPSW05 TO-92-3 package. Pin configuration and lead spacing are identical, allowing direct PCB footprint compatibility.

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

A: Yes. Both 2N3904BU and 2N4401BU are ROHS3 compliant, whereas the MPSW05 is RoHS non-compliant. This compliance status is relevant for new designs and production environments subject to RoHS directives.

Q: What are the inventory implications of using these substitutes?

A: The MPSW05 has 31,488 pieces in stock but is obsolete. The 2N3904BU has 22,060 pieces available and is active. The 2N4401BU has 9,900 pieces available and is active. Active product status ensures continued availability for future production requirements.

Q: How do the frequency characteristics compare between the MPSW05 and substitutes?

A: The MPSW05 has a 50 MHz transition frequency. The 2N3904BU operates at 300 MHz, and the 2N4401BU operates at 250 MHz. Both substitutes offer higher frequency capability, which may affect circuit behavior in high-frequency applications and requires circuit validation.

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