KSC2335RTU Equivalent & Substitute Parts

Part Overview

The KSC2335RTU 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 device is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility within the specified voltage, current, and thermal operating parameters while accommodating modern component availability and compliance standards.

Key Parameters

Parameter	KSC2335RTU Value	Unit
Transistor Type	NPN	-
Voltage - Collector Emitter Breakdown (Max)	400	V
Current - Collector (Ic) (Max)	7	A
Power - Max	1.5	W
Vce Saturation (Max) @ Ib, Ic	1V @ 600mA, 3A	-
DC Current Gain (hFE) (Min) @ Ic, Vce	20 @ 1A, 5V	-
Operating Temperature (Max)	150	°C (TJ)
Package / Case	TO-220-3	-
Mounting Type	Through Hole	-

Substitute Part Grouping Explanation

Substitution of the KSC2335RTU is determined by the following critical electrical and mechanical parameters:

Voltage Rating: Substitute parts must maintain a collector-emitter breakdown voltage (VCEO) equal to or greater than 400 V to ensure safe operation within the original design envelope.

Current Rating: Substitute parts must support a maximum collector current (Ic) equal to or greater than 7 A to handle the specified load conditions.

Package Compatibility: All substitute parts must use the TO-220-3 through-hole package to ensure mechanical and thermal interface compatibility with existing PCB designs and heat sink mounting arrangements.

Transistor Type: All substitutes must be NPN configuration to maintain circuit polarity and biasing relationships.

Thermal Performance: Operating temperature rating must support the maximum junction temperature of 150°C.

The following active parts meet these substitution criteria: ST13007, ST13007D, MJE18008G, and BUJ105A,127. These parts are available in production quantities and maintain electrical compatibility within the specified parameter ranges.

Parameter Comparison

Parameter	KSC2335RTU	ST13007	ST13007D	MJE18008G	BUJ105A,127
Transistor Type	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	400 V	400 V	400 V	450 V	400 V
Current - Collector (Ic) (Max)	7 A	8 A	8 A	8 A	8 A
Power - Max	1.5 W	80 W	80 W	125 W	80 W
Vce Saturation (Max) @ Ib, Ic	1V @ 600mA, 3A	3V @ 2A, 8A	2V @ 2A, 8A	700mV @ 900mA, 4.5A	1V @ 800mA, 4A
DC Current Gain (hFE) (Min) @ Ic, Vce	20 @ 1A, 5V	5 @ 5A, 5V	8 @ 5A, 5V	14 @ 1A, 5V	13 @ 500mA, 5V
Current - Collector Cutoff (Max)	10µA	10µA	100µA	100µA	100µA
Operating Temperature (Max)	150°C	150°C	150°C	150°C	150°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

ST13007D (STMicroelectronics) is the primary recommended substitute. This part maintains exact voltage and current specifications (400 V, 8 A) with improved power dissipation capability (80 W versus 1.5 W), enhanced current cutoff performance (100µA), and active product status with ROHS3 compliance. Inventory availability is substantial at 680,200 units.

ST13007 (STMicroelectronics) provides an alternative with identical electrical ratings to ST13007D. This part is ROHS3 compliant and actively produced with 1,218 units in stock. The primary distinction is marginally higher saturation voltage specification (3V versus 2V at rated conditions).

MJE18008G (onsemi) offers enhanced performance characteristics with 450 V breakdown voltage rating and 125 W power dissipation. This part includes transition frequency specification (13 MHz) and operates across an extended temperature range (-65°C to 150°C). It is ROHS3 compliant and actively produced with 8,097 units available. This option is suitable for applications requiring superior thermal performance or higher voltage margin.

BUJ105A,127 (WeEn Semiconductors) maintains the 400 V voltage specification with 8 A current capability and 80 W power rating. This part is RoHS compliant and actively produced with 743 units in stock. Selection of this part is appropriate when WeEn Semiconductors supply chain integration is preferred.

All substitute parts are through-hole TO-220-3 package devices with 150°C maximum junction temperature rating, ensuring direct mechanical and thermal compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can the KSC2335RTU be directly replaced with any of the listed substitutes?

A: Yes. All listed substitute parts (ST13007, ST13007D, MJE18008G, BUJ105A,127) meet or exceed the electrical specifications of the KSC2335RTU. They share identical TO-220-3 package configuration, NPN transistor type, and 150°C maximum operating temperature. Direct pin-compatible substitution is supported.

Q: What is the primary difference between ST13007 and ST13007D?

A: Both parts are manufactured by STMicroelectronics with identical voltage (400 V) and current (8 A) ratings. ST13007D exhibits lower saturation voltage (2V maximum at rated conditions versus 3V for ST13007) and higher collector cutoff current (100µA versus 10µA). ST13007D is preferred for applications sensitive to saturation voltage performance.

Q: Why does MJE18008G have a higher power rating (125 W) than the original KSC2335RTU (1.5 W)?

A: The MJE18008G is designed for higher power dissipation applications and includes enhanced thermal characteristics. The higher power rating reflects the device's capability, not a requirement for the application. This part operates safely in the KSC2335RTU application envelope while providing additional thermal margin.

Q: Are all substitute parts RoHS compliant?

A: ST13007D and MJE18008G are ROHS3 compliant. ST13007 is ROHS3 compliant. BUJ105A,127 is RoHS compliant. All parts meet current environmental compliance standards.

Q: What is the significance of the TO-220-3 package specification?

A: The TO-220-3 package is a three-lead through-hole configuration with standardized pin spacing and mounting hole pattern. All substitute parts use this identical package, ensuring compatibility with existing PCB layouts, heat sink mounting hardware, and thermal interface materials without design modification.

Q: Can these parts be used in surface-mount applications?

A: No. All listed parts, including the KSC2335RTU, are through-hole components. Surface-mount alternatives would require separate component identification and are not included in this substitution analysis.

Q: Which substitute part offers the best availability?

A: ST13007D offers the highest inventory availability at 680,200 units in stock, followed by MJE18008G at 8,097 units. Both parts are actively produced and suitable for high-volume procurement.

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