KSC2335OTU NPN Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The KSC2335OTU 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, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating the through-hole TO-220 package family.

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 eligibility is determined by the following criteria applied strictly to the provided parameters:

Voltage Compatibility: All substitute parts must maintain a Voltage - Collector Emitter Breakdown rating of 400 V or greater to ensure safe operation in circuits designed for the KSC2335OTU.

Current Capability: Substitute parts must support a maximum collector current (Ic) equal to or exceeding 7 A. Parts with higher current ratings (8 A) are acceptable as they provide equivalent or superior performance within the same voltage class.

Package Compatibility: All substitute parts must use through-hole mounting in the TO-220 package family (TO-220-3, TO-220AB, or TO-220). Pin configuration and mechanical dimensions must be compatible with existing PCB layouts.

Thermal Rating: Operating temperature must be 150°C or higher to match the thermal envelope of the original part.

Product Status: Active substitute parts are preferred over obsolete alternatives to ensure long-term availability and supply chain stability.

The following substitute parts meet all substitution criteria:

BUJ105A,127 (WeEn Semiconductors): 400 V, 8 A, 80 W, TO-220AB, Active
PHE13007,127 (WeEn Semiconductors): 400 V, 8 A, 80 W, TO-220AB, Active
ST13007 (STMicroelectronics): 400 V, 8 A, 80 W, TO-220, Active
ST13007D (STMicroelectronics): 400 V, 8 A, 80 W, TO-220, Active

Parameter Comparison

Part Number	Manufacturer	Ic (Max) [A]	VCEO (Max) [V]	Power (Max) [W]	Package	Status	RoHS
KSC2335OTU	onsemi	7	400	1.5	TO-220-3	Obsolete	—
BUJ105A,127	WeEn Semiconductors	8	400	80	TO-220AB	Active	Compliant
PHE13007,127	WeEn Semiconductors	8	400	80	TO-220AB	Active	ROHS3 Compliant
ST13007	STMicroelectronics	8	400	80	TO-220	Active	ROHS3 Compliant
ST13007D	STMicroelectronics	8	400	80	TO-220	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Selection Criteria:

All four substitute parts satisfy the mandatory electrical parameters (400 V, ≥7 A, through-hole TO-220 package). Selection should prioritize active product status and regulatory compliance.

ST13007D (STMicroelectronics) is the recommended primary substitute. This part is active, ROHS3 compliant, REACH unaffected, and maintains the highest inventory availability (680,200 pcs). The TO-220 package variant ensures direct mechanical compatibility with existing KSC2335OTU PCB layouts.

ST13007 (STMicroelectronics) serves as an equivalent alternative with identical electrical specifications and active status. Both ST13007 and ST13007D variants are manufactured by the same supplier, ensuring consistent quality and support.

PHE13007,127 (WeEn Semiconductors) is an active alternative with ROHS3 compliance and substantial inventory (5,289 pcs). The TO-220AB package variant is mechanically compatible with TO-220-3 layouts. This part offers a secondary sourcing option.

BUJ105A,127 (WeEn Semiconductors) is an active alternative with RoHS compliance and adequate inventory (743 pcs). The TO-220AB package is compatible with TO-220-3 applications.

All substitute parts exceed the original 1.5 W power rating (80 W), providing thermal margin for circuit applications.

Frequently Asked Questions (FAQ)

Q: Can ST13007D directly replace KSC2335OTU without PCB modifications?

A: Yes. Both parts use the TO-220 package family with identical pin configurations and mechanical dimensions. No PCB layout changes are required for direct substitution.

Q: What is the difference between TO-220 and TO-220AB packages?

A: Both are through-hole TO-220 variants with compatible pin spacing and mounting. TO-220AB is a variant designation used by some manufacturers. All substitute parts are mechanically interchangeable in TO-220-3 footprints.

Q: Why do substitute parts have higher power ratings (80 W vs. 1.5 W)?

A: The substitute parts are designed for higher thermal dissipation applications. The 80 W rating reflects improved thermal design and packaging. These parts are fully compatible with circuits designed for the 1.5 W KSC2335OTU and will operate safely with equal or lower power dissipation.

Q: Are all substitute parts RoHS compliant?

A: ST13007, ST13007D, and PHE13007,127 are ROHS3 compliant. BUJ105A,127 is RoHS compliant. All parts meet current environmental regulations for electronic component manufacturing.

Q: Which substitute part offers the best long-term availability?

A: ST13007D has the highest inventory level (680,200 pcs) and is manufactured by STMicroelectronics, a major semiconductor supplier. This ensures sustained availability for production and replacement requirements.

Q: Can I use these substitutes in high-temperature applications?

A: All substitute parts are rated for 150°C maximum junction temperature, matching the original KSC2335OTU specification. Thermal management design should account for the specific application environment.

Q: What is the REACH status of substitute parts?

A: ST13007, ST13007D, and PHE13007,127 are REACH unaffected. BUJ105A,127 REACH status is not specified in the provided data. Verify with the supplier for specific regulatory requirements.

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