MPS650G Equivalent & Substitute Parts

Part Overview

The MPS650G is an NPN bipolar junction transistor manufactured by onsemi, rated for 40 V collector-emitter breakdown voltage and 2 A maximum collector current. This device is packaged in a TO-92 (TO-226-3) through-hole configuration and is designed for general-purpose switching and amplification applications with a maximum power dissipation of 625 mW.

The MPS650G 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 systems utilizing this component.

Substiute Parts

MPS650G

onsemiIn Stock: 2715MPS650G Datasheet

Current PartRFQ

ZTX690B

Diodes IncorporatedIn Stock: 1864ZTX690B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPS650G is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Transistor type must be NPN
• Maximum collector current must be greater than or equal to 2 A
• Collector-emitter breakdown voltage must be greater than or equal to 40 V
• Maximum power dissipation must be greater than or equal to 625 mW
• Operating temperature range must encompass or exceed -55°C to 150°C

Mechanical Compatibility Requirements:

• Mounting type must be through-hole
• Package must be physically compatible with TO-92 footprint or designated as TO-92 compatible

The ZTX690B meets these substitution criteria. It is an NPN transistor with 2 A maximum collector current, 45 V collector-emitter breakdown voltage, 1 W maximum power dissipation, and through-hole E-Line packaging that is designated as TO-92 compatible. The ZTX690B exceeds the electrical specifications of the MPS650G while maintaining mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The MPS650G is classified as obsolete, while the ZTX690B is active. For new designs or ongoing production requiring component replenishment, the ZTX690B is the appropriate selection due to its active product status and continued availability.

Compliance and Certification: The ZTX690B holds RoHS3 compliance certification, whereas the MPS650G does not specify RoHS compliance. Both devices are REACH unaffected and carry EAR99 ECCN classification. For applications subject to RoHS requirements, the ZTX690B provides regulatory alignment.

Electrical Performance: The ZTX690B provides superior electrical performance across multiple parameters: 5 V higher collector-emitter breakdown voltage, 375 mW additional power dissipation capacity, and 75 MHz higher transition frequency. These enhancements provide design margin and improved performance characteristics without compromising the core 2 A collector current specification.

Mechanical Compatibility: The ZTX690B E-Line package is designated as TO-92 compatible, enabling direct footprint substitution in existing through-hole designs without PCB modification.

Frequently Asked Questions (FAQ)

Q: Can the ZTX690B directly replace the MPS650G in existing designs?

A: Yes. The ZTX690B meets all minimum electrical requirements of the MPS650G (2 A collector current, 40 V minimum breakdown voltage, 625 mW minimum power dissipation) and is packaged in a TO-92 compatible configuration. Direct substitution is electrically and mechanically valid.

Q: What are the key differences between these two transistors?

A: The ZTX690B exceeds the MPS650G in collector-emitter breakdown voltage (45 V vs. 40 V), maximum power dissipation (1 W vs. 625 mW), transition frequency (150 MHz vs. 75 MHz), and maximum operating temperature (200°C vs. 150°C). Both devices share identical 2 A collector current ratings and 100 nA collector cutoff current specifications.

Q: Are there any package considerations for substitution?

A: The MPS650G uses a TO-92-3 package, while the ZTX690B uses an E-Line-3 package. Both are through-hole configurations with TO-92 compatible pinouts. Physical dimensions may vary slightly, but standard TO-92 footprints accommodate both packages without PCB redesign.

Q: Does the ZTX690B require any circuit modifications when substituting for the MPS650G?

A: No circuit modifications are required. The ZTX690B is a direct electrical substitute with superior specifications. Existing bias networks, load resistances, and circuit topologies designed for the MPS650G operate without adjustment.

Q: What is the significance of the higher transition frequency in the ZTX690B?

A: The ZTX690B transition frequency of 150 MHz, compared to the MPS650G at 75 MHz, indicates improved high-frequency performance. This provides additional design margin for switching applications and enables operation at higher switching frequencies without performance degradation.

Q: Are both devices suitable for the same temperature range applications?

A: The MPS650G operates from -55°C to 150°C, while the ZTX690B operates from -55°C to 200°C. For applications requiring operation above 150°C, only the ZTX690B is suitable. For applications within the -55°C to 150°C range, both devices are compatible.

Q: What compliance advantages does the ZTX690B offer?

A: The ZTX690B is RoHS3 compliant, providing regulatory alignment for applications subject to RoHS directives. The MPS650G does not specify RoHS compliance. Both devices are REACH unaffected.