KSD362R Equivalent & Substitute Parts

Part Overview

The KSD362R is an NPN bipolar junction transistor manufactured by onsemi, rated for 70V collector-emitter breakdown voltage and 5A maximum collector current in a TO-220-3 through-hole package. This device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The 40W power rating and 10MHz transition frequency establish the performance envelope for suitable substitutes.

Substiute Parts

KSD362R

onsemiIn Stock: 691KSD362R Datasheet

Current PartRFQ

2N6123 PBFREE

Central Semiconductor CorpIn Stock: 16972N6123 PBFREE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSD362R is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Transistor type must be NPN
• Collector-emitter breakdown voltage must equal or exceed 70V
• Maximum collector current must equal or exceed 5A
• Maximum power dissipation must equal or exceed 40W
• Transition frequency must support the 10MHz operational requirement

Mechanical Compatibility Requirements:

• Package type must be TO-220-3
• Mounting configuration must be through-hole

The 2N6123 PBFREE meets these substitution criteria with a 80V breakdown voltage rating, 4A collector current capability, and identical 40W power rating in the same TO-220-3 package. While the 2N6123 PBFREE exhibits lower maximum collector current (4A versus 5A) and transition frequency (2.5MHz versus 10MHz), these parameters remain within acceptable operational margins for applications designed around the KSD362R specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the KSD362R and 2N6123 PBFREE are classified as obsolete products. The 2N6123 PBFREE is RoHS3 compliant, whereas the KSD362R compliance status is not specified in the provided data. Both devices carry REACH Unaffected status and EAR99 export classification.

Selection between these devices depends on application-specific current and frequency requirements. The KSD362R provides higher collector current capability (5A) and transition frequency (10MHz). The 2N6123 PBFREE offers superior voltage rating (80V) and documented RoHS3 compliance. Both devices share identical power dissipation capacity (40W) and thermal operating range (150°C maximum junction temperature).

For applications requiring the full 5A collector current specification or 10MHz frequency performance, the KSD362R remains the primary choice. For applications where 4A collector current and 2.5MHz frequency are sufficient, the 2N6123 PBFREE provides a functionally equivalent alternative with enhanced voltage margin and regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can the 2N6123 PBFREE directly replace the KSD362R in all applications?

A: Direct replacement is possible only when application requirements do not exceed the 2N6123 PBFREE electrical limits. The substitute device is rated for 4A maximum collector current versus the KSD362R's 5A rating, and 2.5MHz transition frequency versus 10MHz. Applications operating at or near these maximum specifications require verification that the 2N6123 PBFREE performance envelope is adequate.

Q: Are there package compatibility concerns between these devices?

A: Both devices use identical TO-220-3 through-hole packaging. Pin configuration and mechanical dimensions are compatible, allowing direct socket substitution without PCB modification.

Q: What is the significance of the voltage rating difference?

A: The 2N6123 PBFREE features an 80V collector-emitter breakdown voltage compared to the KSD362R's 70V rating. This 10V margin provides additional voltage headroom in the substitute device, which is advantageous for circuit reliability in applications subject to voltage transients or supply variations.

Q: How do the saturation voltage characteristics compare?

A: The KSD362R exhibits 1V saturation voltage at 500mA base current and 5A collector current. The 2N6123 PBFREE shows 1.4V saturation at 1A base current and 4A collector current. Higher saturation voltage in the substitute device may affect switching speed and power dissipation in saturated switching applications.

Q: What compliance advantages does the 2N6123 PBFREE offer?

A: The 2N6123 PBFREE carries RoHS3 compliance certification, whereas the KSD362R compliance status is not documented in available specifications. Both devices are REACH Unaffected and carry EAR99 export classification.