KSC2682OSTU Equivalent & Substitute Parts

Part Overview

The KSC2682OSTU is an NPN bipolar junction transistor manufactured by onsemi, rated for 180 V collector-emitter breakdown voltage and 100 mA maximum collector current. This device is packaged in a TO-126-3 through-hole configuration and is designed for general-purpose switching and amplification applications requiring moderate voltage and current ratings.

The KSC2682OSTU is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing maintenance, repair, and production requirements for legacy equipment and systems utilizing this transistor.

Substiute Parts

KSC2682OSTU

onsemiIn Stock: 1168KSC2682OSTU Datasheet

Current PartRFQ

MJE340

NTE Electronics, IncIn Stock: 2035MJE340 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSC2682OSTU requires evaluation based on the following critical parameters:

Transistor Type: Both the main part and substitute must be NPN configuration to maintain circuit polarity and biasing characteristics.

Voltage Rating: The substitute must meet or exceed the 180 V collector-emitter breakdown voltage specification to ensure safe operation within the original circuit design envelope.

Current Rating: The substitute must support the required collector current. The KSC2682OSTU operates at a maximum of 100 mA; substitutes with equal or higher current ratings are acceptable.

Package / Case: The TO-126-3 through-hole package is a critical mechanical parameter. Substitutes must use compatible through-hole packages to ensure proper board mounting and thermal management.

DC Current Gain (hFE): The minimum gain specification of 100 @ 10 mA, 5 V establishes the amplification capability required for the circuit. Substitutes with comparable or superior gain characteristics are acceptable.

Power Dissipation: The 1.2 W maximum power rating defines thermal requirements. Substitutes with equal or higher power ratings ensure adequate thermal performance.

The MJE340 is identified as a substitute based on its NPN configuration, through-hole TO-126 package compatibility, and superior electrical ratings that encompass the KSC2682OSTU operating parameters.

Parameter Comparison

Engineering Selection Recommendations

KSC2682OSTU Status: The KSC2682OSTU is obsolete and no longer manufactured. Continued sourcing of this component is limited to existing inventory. The REACH status is listed as REACH Unaffected, and the ECCN classification is EAR99.

MJE340 Status: The MJE340 is an active product manufactured by NTE Electronics, Inc, ensuring ongoing availability and supply chain continuity. However, the MJE340 is classified as RoHS non-compliant, which may present constraints in applications subject to RoHS directives.

Electrical Compatibility: The MJE340 provides superior electrical performance across all primary ratings. The 300 V breakdown voltage exceeds the 180 V requirement of the KSC2682OSTU. The 500 mA maximum collector current is five times the 100 mA specification of the original part. The 20 W power rating substantially exceeds the 1.2 W rating of the KSC2682OSTU. These higher ratings ensure the MJE340 operates safely within the original circuit design envelope.

Package Compatibility: Both devices use TO-126 through-hole packages. The TO-126-3 and TO-126 designations refer to the same physical package form factor, ensuring mechanical compatibility with existing printed circuit board layouts and mounting hardware.

DC Current Gain Consideration: The MJE340 exhibits a lower minimum DC current gain (30 @ 50 mA, 10 V) compared to the KSC2682OSTU (100 @ 10 mA, 5 V). Circuit designs dependent on the higher gain of the original part require evaluation to confirm acceptable performance with the reduced gain characteristic of the substitute.

Compliance Considerations: Applications subject to RoHS compliance requirements must account for the non-compliant status of the MJE340. Alternative substitutes meeting RoHS requirements may be necessary for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the MJE340 directly replace the KSC2682OSTU in all applications?

A: The MJE340 is mechanically and electrically compatible with the KSC2682OSTU in terms of package form factor and voltage/current ratings. However, the lower DC current gain of the MJE340 requires circuit evaluation. Applications relying on the higher gain of the KSC2682OSTU may require bias network adjustments to achieve equivalent performance.

Q: What is the significance of the TO-126-3 versus TO-126 package designation?

A: Both designations refer to the same three-lead through-hole package form factor. The TO-126-3 and TO-126 are mechanically and electrically identical, ensuring direct physical compatibility on printed circuit boards designed for the KSC2682OSTU.

Q: Why is the MJE340 rated for higher voltage and current than the KSC2682OSTU?

A: The MJE340 is a higher-performance device designed for applications requiring greater power handling capability. The superior ratings ensure safe operation in circuits originally designed for the KSC2682OSTU, as the substitute operates well within its design margins.

Q: Does the RoHS non-compliance of the MJE340 affect its use as a substitute?

A: RoHS compliance is a regulatory requirement dependent on the application and market jurisdiction. Applications subject to RoHS directives cannot use the MJE340 without regulatory approval or identification of an alternative RoHS-compliant substitute. Applications without RoHS requirements are unaffected by this classification.

Q: Are there other substitutes available for the KSC2682OSTU?

A: The provided substitute list identifies the MJE340 as the documented equivalent. Additional substitutes may exist; however, any alternative must meet the electrical parameters (NPN type, minimum 180 V breakdown voltage, minimum 100 mA collector current, TO-126 package compatibility) and be evaluated for DC current gain compatibility with the specific circuit design.

Q: What precautions should be taken when substituting the MJE340 for the KSC2682OSTU?

A: Verify that the circuit design does not depend critically on the higher DC current gain of the KSC2682OSTU. Confirm that RoHS compliance is not a requirement for the application. Test the substitute in the target circuit to ensure performance meets design specifications, particularly in gain-dependent biasing networks or high-frequency switching applications.