KSC2334Y Equivalent & Substitute Parts

Part Overview

The KSC2334Y is an NPN bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 7 A maximum collector current in a TO-220-3 through-hole package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. Identifying equivalent and substitute parts is necessary to ensure design continuity and procurement flexibility for applications requiring NPN transistor functionality within the specified electrical and thermal parameters.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	100	V
Current - Collector (Ic) (Max)	7	A
Power - Max	1.5	W
Vce Saturation (Max)	600 mV @ 500 mA, 5 A	—
DC Current Gain (hFE) (Min)	120 @ 3 A, 5 V	—
Operating Temperature (Max)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—

Substitute Part Grouping Explanation

Substitute parts for the KSC2334Y are classified into two categories based on electrical parameter alignment:

Direct Equivalent (Packaging Variant): The KSC2334YTU maintains identical electrical specifications to the KSC2334Y, differing only in packaging format (Tube versus Bulk). This part is suitable for direct substitution in all applications where the KSC2334Y is specified.

Similar Substitutes (Electrical Parameter Variance): The BD243CG, TIP29CG, TIP31CG, and TIP41C are classified as similar substitutes because they share the following common parameters with the KSC2334Y:

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): 100 V
Mounting Type: Through Hole
Package / Case: TO-220-3

However, these parts exhibit variations in maximum collector current (Ic), power dissipation (P-Max), and DC current gain (hFE) specifications. Substitution with these parts requires verification that the application's current and power requirements do not exceed the substitute part's rated limits.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) [A]	Vce Breakdown (Max) [V]	Power (Max) [W]	Vce Saturation (Max)	hFE (Min)	Package	Product Status
KSC2334Y	onsemi	7	100	1.5	600 mV @ 500 mA, 5 A	120 @ 3 A, 5 V	TO-220-3	Last Time Buy
KSC2334YTU	onsemi	7	100	1.5	600 mV @ 500 mA, 5 A	120 @ 3 A, 5 V	TO-220-3	Active
BD243CG	onsemi	6	100	65	1.5 V @ 1 A, 6 A	15 @ 3 A, 4 V	TO-220-3	Active
TIP29CG	onsemi	1	100	2	700 mV @ 125 mA, 1 A	15 @ 1 A, 4 V	TO-220-3	Active
TIP31CG	onsemi	3	100	2	1.2 V @ 375 mA, 3 A	10 @ 3 A, 4 V	TO-220-3	Active
TIP41C	NTE Electronics, Inc	6	100	2	1.5 V @ 600 mA, 6 A	15 @ 3 A, 4 V	TO-220-3	Active

Engineering Selection Recommendations

Primary Selection: KSC2334YTU is the recommended substitute for KSC2334Y. This part is manufactured by onsemi with identical electrical specifications and maintains Active product status, ensuring long-term availability and supply chain stability. The only difference is packaging format (Tube instead of Bulk), which does not affect electrical performance or mechanical compatibility.

Secondary Selections: BD243CG and TIP41C are suitable substitutes for applications where collector current requirements do not exceed 6 A. Both parts maintain the 100 V breakdown voltage specification and TO-220-3 package compatibility. BD243CG offers significantly higher power dissipation capability (65 W versus 1.5 W), making it suitable for high-power applications. TIP41C is manufactured by NTE Electronics, Inc and provides an alternative sourcing option.

Limited Substitutes: TIP29CG and TIP31CG are limited substitutes due to reduced maximum collector current ratings (1 A and 3 A respectively). These parts are suitable only for applications where the KSC2334Y's 7 A rating is not required. TIP31CG, with 3 A maximum current, provides closer electrical alignment than TIP29CG for moderate-current applications.

All substitute parts listed are ROHS3 Compliant and REACH Unaffected, meeting regulatory compliance requirements equivalent to the KSC2334Y.

Frequently Asked Questions (FAQ)

Q: Can KSC2334YTU be used as a direct replacement for KSC2334Y? A: Yes. KSC2334YTU is a direct electrical equivalent with identical specifications. The difference is packaging format (Tube versus Bulk). Both parts are manufactured by onsemi and are electrically interchangeable.

Q: What is the primary difference between KSC2334Y and BD243CG? A: The primary differences are maximum collector current (7 A versus 6 A) and power dissipation (1.5 W versus 65 W). BD243CG is suitable for applications requiring lower current but higher power handling capability. Vce saturation characteristics also differ, with BD243CG exhibiting higher saturation voltage.

Q: Can TIP29CG replace KSC2334Y in all applications? A: No. TIP29CG has a maximum collector current rating of 1 A, compared to KSC2334Y's 7 A rating. TIP29CG is suitable only for low-current applications where collector current does not exceed 1 A.

Q: Are all substitute parts available in TO-220-3 package? A: Yes. All substitute parts listed are available in TO-220-3 through-hole package, ensuring mechanical and pin compatibility with KSC2334Y.

Q: What is the significance of KSC2334Y being classified as Last Time Buy? A: Last Time Buy status indicates that onsemi has discontinued production of KSC2334Y in Bulk packaging. KSC2334YTU (Tube packaging) remains in Active status and is the recommended long-term substitute. Alternative parts such as BD243CG and TIP41C provide additional sourcing options.

Q: Do all substitute parts meet the same regulatory compliance as KSC2334Y? A: Yes. All substitute parts listed are ROHS3 Compliant and REACH Unaffected, matching the regulatory compliance profile of KSC2334Y.

Q: Which substitute part offers the best thermal performance? A: BD243CG offers the highest power dissipation rating at 65 W, providing superior thermal performance compared to KSC2334Y (1.5 W) and other substitutes. This makes BD243CG suitable for high-power applications requiring enhanced heat dissipation.

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