KSC2335Y Equivalent & Substitute Parts

Part Overview

The KSC2335Y is an NPN bipolar junction transistor manufactured by onsemi, rated for 400 V collector-emitter breakdown voltage and 7 A maximum collector current in a TO-220-3 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and production continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating packaging and performance variations.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	400	V
Current - Collector (Ic) (Max)	7	A
Power - Max	1.5	W
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—

Substitute Part Grouping Explanation

Substitution of the KSC2335Y is determined by the following critical parameters:

Electrical Compatibility Requirements:

Transistor type must be NPN
Voltage - Collector Emitter Breakdown rating must be ≥ 400 V
Current - Collector (Ic) maximum rating must be ≥ 7 A
Operating temperature must support 150°C (TJ)

Mechanical Compatibility Requirements:

Mounting type must be Through Hole
Package must be TO-220 variant (TO-220-3, TO-220AB, or TO-220)

The substitute parts identified (BUJ105A,127; ST13007; ST13007D) satisfy these criteria with collector current ratings of 8 A and voltage ratings of 400 V. All substitute parts are active products with current manufacturing status, ensuring long-term availability. Power dissipation ratings of 80 W in substitute parts exceed the 1.5 W specification of the KSC2335Y, providing thermal margin for the application.

Parameter Comparison

Parameter	KSC2335Y (onsemi)	BUJ105A,127 (WeEn)	ST13007 (STMicro)	ST13007D (STMicro)
Transistor Type	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	400 V	400 V	400 V	400 V
Current - Collector (Ic) (Max)	7 A	8 A	8 A	8 A
Vce Saturation (Max) @ Ib, Ic	1V @ 600mA, 3A	1V @ 800mA, 4A	3V @ 2A, 8A	2V @ 2A, 8A
Current - Collector Cutoff (Max)	10µA	100µA	10µA	100µA
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 1A, 5V	13 @ 500mA, 5V	5 @ 5A, 5V	8 @ 5A, 5V
Power - Max	1.5 W	80 W	80 W	80 W
Operating Temperature (TJ)	150°C	150°C	150°C	150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220AB	TO-220	TO-220
Product Status	Obsolete	Active	Active	Active
RoHS Status	—	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

ST13007D (STMicroelectronics) is the primary substitute for the KSC2335Y. This part maintains 400 V voltage rating and 8 A current capability with active product status and ROHS3 compliance. Inventory availability of 680,200 units ensures supply continuity. The TO-220 package is mechanically compatible with TO-220-3 applications.

ST13007 (STMicroelectronics) serves as an alternative substitute with identical voltage and current ratings, active status, and ROHS3 compliance. Inventory of 1,218 units supports immediate procurement. Vce saturation characteristics differ from the KSC2335Y; circuit analysis is required for applications sensitive to saturation voltage.

BUJ105A,127 (WeEn Semiconductors) provides a third substitution option with 400 V and 8 A ratings, RoHS compliance, and active manufacturing status. The TO-220AB package variant maintains through-hole mounting compatibility. Inventory of 743 units is available.

All substitute parts exceed the 7 A collector current requirement and maintain the 400 V voltage specification. The 80 W power rating in all substitutes provides thermal headroom beyond the 1.5 W KSC2335Y specification. Selection between ST13007D, ST13007, and BUJ105A,127 depends on application-specific requirements for saturation voltage characteristics and supplier preference.

Frequently Asked Questions (FAQ)

Q: Can ST13007D directly replace KSC2335Y in existing PCB layouts?

A: Yes. Both parts use TO-220 package variants with identical pin configurations for through-hole mounting. Pin-to-pin compatibility is maintained for collector, base, and emitter connections.

Q: What are the differences in DC current gain between KSC2335Y and substitute parts?

A: The KSC2335Y specifies hFE (Min) of 40 @ 1A, 5V. Substitute parts show lower hFE values: BUJ105A,127 at 13 @ 500mA, 5V; ST13007 at 5 @ 5A, 5V; ST13007D at 8 @ 5A, 5V. Circuit designs relying on specific gain characteristics require verification against actual operating conditions.

Q: Are all substitute parts RoHS compliant?

A: Yes. BUJ105A,127 is RoHS Compliant. ST13007 and ST13007D are ROHS3 Compliant. The KSC2335Y status is not specified in available documentation.

Q: What is the significance of the higher power rating in substitute parts?

A: Substitute parts are rated for 80 W maximum power dissipation compared to 1.5 W for the KSC2335Y. This reflects improved thermal design and packaging in modern equivalents, providing margin for thermal management in the application.

Q: How do Vce saturation characteristics affect substitution?

A: Vce saturation varies across parts. KSC2335Y specifies 1V @ 600mA, 3A. ST13007D specifies 2V @ 2A, 8A. Applications operating in saturation mode require circuit analysis to confirm acceptable voltage drop at operating current levels.

Q: Is the TO-220AB package of BUJ105A,127 compatible with TO-220-3 footprints?

A: TO-220AB and TO-220-3 are mechanically compatible variants of the TO-220 package family. Both support through-hole mounting with identical lead spacing and pin assignments for NPN transistor applications.

Q: What inventory considerations apply to these substitutes?

A: ST13007D offers the highest inventory availability at 680,200 units. ST13007 provides 1,218 units. BUJ105A,127 has 743 units available. Selection based on procurement timeline and volume requirements is appropriate.

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