MPSW92 Equivalent & Substitute Parts

Part Overview

The MPSW92 is a PNP bipolar junction transistor manufactured by onsemi, rated for 300 V collector-emitter breakdown voltage and 500 mA maximum collector current in a Through Hole TO-92 package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The MPSW92 delivers 1 W maximum power dissipation and operates across a temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	500	mA
Voltage - Collector Emitter Breakdown (Max)	300	V
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 MPSW92 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be PNP
Collector-emitter breakdown voltage must be ≥ 300 V
Maximum collector current must be ≥ 500 mA
Maximum power dissipation must be ≥ 1 W
Operating temperature range must encompass or exceed -55°C to 150°C

Mechanical Compatibility Criteria:

Mounting type must be Through Hole
Package must be TO-92 compatible or E-Line (TO-92 compatible)

The substitute parts ZTX757 and ZTX957 meet these criteria. Both are manufactured by Diodes Incorporated, feature PNP configuration, 300 V breakdown voltage, and Through Hole mounting in TO-92 compatible packages. ZTX757 maintains the 500 mA collector current rating, while ZTX957 provides enhanced current capability at 1 A.

Parameter Comparison

Parameter	MPSW92 (onsemi)	ZTX757 (Diodes Inc.)	ZTX957 (Diodes Inc.)
Transistor Type	PNP	PNP	PNP
Current - Collector (Ic) Max	500 mA	500 mA	1 A
Voltage - Collector Emitter Breakdown (Max)	300 V	300 V	300 V
Vce Saturation (Max)	500 mV @ 2 mA, 20 mA	500 mV @ 10 mA, 100 mA	200 mV @ 300 mA, 1 A
Current - Collector Cutoff (Max)	250 nA	100 nA	50 nA
DC Current Gain (hFE) Min	25 @ 30 mA, 10 V	50 @ 100 mA, 5 V	100 @ 500 mA, 10 V
Power - Max	1 W	1 W	1.2 W
Frequency - Transition	50 MHz	30 MHz	85 MHz
Operating Temperature Range	-55 to 150 °C	-55 to 200 °C	-55 to 200 °C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	E-Line-3 (TO-92 compatible)	E-Line-3 (TO-92 compatible)
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

ZTX757 Selection: The ZTX757 provides direct electrical equivalence to the MPSW92 with matched 500 mA collector current and 300 V breakdown voltage ratings. The ZTX757 is manufactured by Diodes Incorporated and carries Active product status with ROHS3 compliance. The E-Line package is mechanically compatible with TO-92 footprints. The ZTX757 exhibits superior DC current gain (50 vs. 25) and lower collector cutoff current (100 nA vs. 250 nA), resulting in improved switching characteristics. Extended operating temperature range to 200°C provides additional thermal margin. The ZTX757 is suitable for direct replacement in applications where the MPSW92's 50 MHz transition frequency is adequate.

ZTX957 Selection: The ZTX957 offers enhanced performance with doubled collector current capability (1 A vs. 500 mA) and increased power dissipation (1.2 W vs. 1 W). The ZTX957 features significantly higher transition frequency (85 MHz vs. 50 MHz) and superior DC current gain (100 vs. 25), enabling faster switching and improved amplification. Lower saturation voltage (200 mV vs. 500 mV) reduces power loss in switching applications. The ZTX957 is manufactured by Diodes Incorporated with Active product status and ROHS3 compliance. This part is selected when design requirements demand higher current handling, faster switching speed, or improved thermal performance beyond the MPSW92 specification.

Both substitute parts provide REACH compliance and are classified under ECCN EAR99 with identical HTSUS coding to the MPSW92.

Frequently Asked Questions (FAQ)

Q: Can the ZTX757 be used as a direct replacement for the MPSW92?

A: Yes. The ZTX757 maintains electrical equivalence across all critical parameters: 500 mA collector current, 300 V breakdown voltage, 1 W power dissipation, and PNP configuration. The E-Line package is mechanically compatible with TO-92 footprints. The ZTX757 is Active product status with ROHS3 compliance, addressing the obsolescence of the MPSW92.

Q: What is the difference between ZTX757 and ZTX957?

A: The ZTX957 provides enhanced specifications: 1 A collector current (vs. 500 mA), 1.2 W power dissipation (vs. 1 W), 85 MHz transition frequency (vs. 30 MHz), and superior DC current gain (100 vs. 50). The ZTX957 is selected for applications requiring higher current handling or faster switching performance.

Q: Are the substitute parts physically compatible with MPSW92 PCB layouts?

A: Yes. Both ZTX757 and ZTX957 use E-Line packages that are mechanically compatible with TO-92 footprints. Pin configuration and spacing conform to TO-92 standards, enabling direct board-level substitution without layout modification.

Q: Do the substitute parts meet modern compliance requirements?

A: Yes. Both ZTX757 and ZTX957 are ROHS3 compliant and REACH unaffected, addressing regulatory requirements that the obsolete, non-compliant MPSW92 does not meet.

Q: What is the operating temperature difference between the MPSW92 and substitute parts?

A: The MPSW92 operates from -55°C to 150°C. Both ZTX757 and ZTX957 extend the upper limit to 200°C, providing 50°C additional thermal margin for high-temperature applications.

Q: Which substitute part should be selected for high-frequency switching applications?

A: The ZTX957 is recommended for high-frequency applications, featuring 85 MHz transition frequency compared to the MPSW92's 50 MHz and the ZTX757's 30 MHz. The ZTX957 also provides lower saturation voltage (200 mV), reducing switching losses.

Q: Are there any performance trade-offs when substituting the MPSW92?

A: The ZTX757 provides equivalent performance with improved characteristics (higher DC gain, lower cutoff current). The ZTX957 introduces enhanced performance across all metrics. No performance degradation occurs with either substitute when applied within their rated specifications.

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