KSC2690AYS Equivalent & Substitute Parts

Part Overview

The KSC2690AYS is an NPN bipolar junction transistor manufactured by onsemi, rated for 160 V collector-emitter breakdown voltage and 1.2 A 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. The part maintains Active product status with 1350 units in current inventory stock.

Substitute parts are identified when equivalent electrical and mechanical parameters align within the allowed specifications for this transistor category, enabling direct replacement in circuit designs where the primary performance characteristics remain compatible.

Substiute Parts

KSC2690AYS

onsemiIn Stock: 1374KSC2690AYS Datasheet

Current PartRFQ

MJE340

NTE Electronics, IncIn Stock: 2035MJE340 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KSC2690AYS is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Transistor Type: NPN configuration required
• Mounting Type: Through Hole required
• Package / Case: TO-126-3 or equivalent TO-225AA footprint required

Electrical Performance Parameters:

• Voltage - Collector Emitter Breakdown (Max): Must equal or exceed 160 V
• Current - Collector (Ic) (Max): Must equal or exceed 1.2 A
• Power - Max: Must equal or exceed 1.2 W
• DC Current Gain (hFE): Must meet or exceed 35 @ specified test conditions

The MJE340 is identified as a substitute part based on matching transistor type (NPN), mounting configuration (Through Hole), and package compatibility (TO-126-3). The MJE340 exceeds the voltage and power ratings of the KSC2690AYS, providing operational margin in higher-voltage applications.

Parameter Comparison

Engineering Selection Recommendations

KSC2690AYS Selection Criteria:

• Applications requiring 1.2 A collector current capacity
• Designs operating at 160 V collector-emitter breakdown voltage
• Circuits requiring 155 MHz transition frequency performance
• RoHS3 compliance mandatory
• REACH compliance required

MJE340 Selection Criteria:

• Applications with higher voltage requirements (300 V rated)
• Designs where collector current can be limited to 500 mA or below
• Circuits benefiting from increased power dissipation capability (20 W)
• Applications where RoHS compliance is not required
• Direct footprint compatibility with TO-126-3 mounting

The KSC2690AYS maintains Active product status with RoHS3 compliance and REACH unaffected designation. The MJE340 is also Active but is RoHS non-compliant. Selection between these parts depends on regulatory requirements, voltage/current specifications, and compliance certifications applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Can the MJE340 directly replace the KSC2690AYS in all applications?

A: Direct replacement is limited by electrical parameter differences. The MJE340 has a lower maximum collector current (500 mA vs. 1.2 A) and different DC current gain specifications. Substitution is valid only when circuit design accommodates the MJE340's reduced current rating and the application does not require RoHS3 compliance.

Q: What is the primary difference in voltage ratings between these parts?

A: The KSC2690AYS is rated for 160 V collector-emitter breakdown voltage, while the MJE340 is rated for 300 V. The MJE340 provides higher voltage margin but is not required for applications designed within the 160 V specification.

Q: Are the TO-126-3 and TO-126 packages mechanically identical?

A: Both packages are through-hole TO-126 variants with compatible pin configurations and footprints. Mechanical substitution is valid for PCB mounting purposes.

Q: What compliance differences exist between these parts?

A: The KSC2690AYS is RoHS3 compliant and REACH unaffected. The MJE340 is RoHS non-compliant. Applications subject to RoHS3 requirements must use the KSC2690AYS or identify alternative compliant substitutes.

Q: How do the power dissipation ratings affect substitution decisions?

A: The KSC2690AYS is rated for 1.2 W maximum power dissipation, while the MJE340 is rated for 20 W. The MJE340 accommodates higher power dissipation but is not necessary for applications designed within the 1.2 W specification.

Q: What is the significance of the different DC current gain specifications?

A: The KSC2690AYS specifies hFE minimum of 35 @ 5mA, 5V. The MJE340 specifies hFE minimum of 30 @ 50mA, 10V. These are measured at different test conditions and cannot be directly compared. Circuit designs must account for the specific gain characteristics at the intended operating point.