KSD362RTU Equivalent & Substitute Parts

Part Overview

The KSD362RTU is an NPN bipolar junction transistor manufactured by onsemi, rated for 70 V collector-emitter breakdown voltage and 5 A 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 40 W power rating and 10 MHz transition frequency establish the performance envelope for suitable substitutes.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	70	V
Current - Collector (Ic) (Max)	5	A
Power - Max	40	W
Frequency - Transition	10	MHz
Package / Case	TO-220-3	—
Mounting Type	Through Hole	—
Operating Temperature (Max)	150	°C

Substitute Part Grouping Explanation

Substitution of the KSD362RTU is determined by the following critical parameters:

Mandatory Matching Criteria:

Transistor polarity: NPN
Package type: TO-220-3 through-hole
Power dissipation rating: 40 W minimum
Operating temperature range: 150°C maximum junction temperature

Allowable Parameter Ranges for Substitution:

Collector-emitter breakdown voltage: Equal to or greater than 70 V
Maximum collector current: Equal to or greater than 5 A
Transition frequency: Equal to or greater than 10 MHz

Substitute parts meeting these criteria can be used in applications designed for the KSD362RTU without circuit modification, provided the application does not depend on specifications unique to the original device.

Parameter Comparison

Parameter	KSD362RTU	KSD363RTU	2N6123 PBFREE	Unit
Transistor Type	NPN	NPN	NPN	—
Voltage - Collector Emitter Breakdown (Max)	70	120	80	V
Current - Collector (Ic) (Max)	5	6	4	A
Power - Max	40	40	40	W
Frequency - Transition	10	10	2.5	MHz
Package / Case	TO-220-3	TO-220-3	TO-220-3	—
Mounting Type	Through Hole	Through Hole	Through Hole	—
Operating Temperature (Max)	150	150	150	°C
Product Status	Obsolete	Active	Obsolete	—

Engineering Selection Recommendations

KSD363RTU (onsemi): This part is the primary substitute for the KSD362RTU. It exceeds the original specifications in collector-emitter breakdown voltage (120 V vs. 70 V) and maximum collector current (6 A vs. 5 A) while maintaining identical power rating, transition frequency, and package configuration. The KSD363RTU carries active product status and RoHS3 compliance, providing long-term availability and regulatory alignment. This part is suitable for direct replacement in all applications where the KSD362RTU was specified.

2N6123 PBFREE (Central Semiconductor Corp): This part meets the TO-220-3 package and 40 W power requirements. However, the transition frequency of 2.5 MHz falls below the 10 MHz specification of the KSD362RTU, and the maximum collector current of 4 A is below the original 5 A rating. The 2N6123 PBFREE is classified as obsolete. This part is suitable only for applications where transition frequency and collector current requirements are less stringent than the original design specification.

Frequently Asked Questions (FAQ)

Q: Can the KSD363RTU be used as a direct replacement for the KSD362RTU?

A: Yes. The KSD363RTU meets or exceeds all critical parameters of the KSD362RTU: collector-emitter breakdown voltage (120 V ≥ 70 V), maximum collector current (6 A ≥ 5 A), transition frequency (10 MHz = 10 MHz), and power rating (40 W = 40 W). Both devices use the TO-220-3 package and support identical operating temperatures. No circuit modifications are required.

Q: What is the primary limitation of the 2N6123 PBFREE as a substitute?

A: The 2N6123 PBFREE has a transition frequency of 2.5 MHz, which is 75% lower than the KSD362RTU specification of 10 MHz. Applications requiring the full 10 MHz switching performance of the original device cannot use this substitute without performance degradation.

Q: Are all substitute parts available in the same package?

A: Yes. The KSD362RTU, KSD363RTU, and 2N6123 PBFREE are all manufactured in the TO-220-3 through-hole package. No mechanical redesign or PCB layout modification is necessary when substituting between these parts.

Q: What is the significance of product status when selecting a substitute?

A: The KSD362RTU is classified as obsolete, indicating discontinued manufacturing and limited future availability. The KSD363RTU carries active status, ensuring continued production and supply chain stability. For new designs or long-term production requirements, the KSD363RTU is the preferred choice.

Q: Can the 2N6123 PBFREE be used in high-frequency switching applications?

A: No. The 2.5 MHz transition frequency of the 2N6123 PBFREE restricts its use to low-frequency applications. Circuits requiring switching speeds at or above 10 MHz must use the KSD362RTU or KSD363RTU.

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