KSH42CTF Equivalent & Substitute Parts

Part Overview

The KSH42CTF is a PNP bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 6 A maximum collector current in a surface mount DPAK package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The KSH42CTF serves in switching and amplification circuits requiring moderate current handling at moderate frequencies.

Key Parameters

Parameter	Value
Transistor Type	PNP
Current - Collector (Ic) (Max)	6 A
Voltage - Collector Emitter Breakdown (Max)	100 V
Vce Saturation (Max) @ Ib, Ic	1.5V @ 600mA, 6A
Current - Collector Cutoff (Max)	50µA
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 3A, 4V
Power - Max	1.75 W
Frequency - Transition	3MHz
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
Operating Temperature (Max)	150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the KSH42CTF are categorized based on electrical parameter compatibility and packaging equivalence. The primary substitution criteria are:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 6 A maximum collector current, 100 V breakdown voltage, 1.75 W power dissipation, 3 MHz transition frequency, and matching saturation characteristics. These parts differ only in packaging format (tube, tape & reel, or cut tape) and product status (active versus obsolete).

Direct Equivalents share the same electrical performance and DPAK package but may have extended operating temperature ranges or different packaging configurations.

Similar Alternatives provide reduced current ratings (2 A to 4 A) or different package types (TP-FA) while maintaining 100 V breakdown voltage and PNP polarity. These are suitable only when circuit design permits lower current specifications.

Parameter Comparison

Part Number	Manufacturer	Transistor Type	Ic (Max)	Vce Breakdown (Max)	Vce Sat (Max)	Power (Max)	Frequency	Package	Product Status	Operating Temp
KSH42CTF	onsemi	PNP	6 A	100 V	1.5V @ 600mA, 6A	1.75 W	3MHz	DPAK	Obsolete	150°C
MJD42CG	onsemi	PNP	6 A	100 V	1.5V @ 600mA, 6A	1.75 W	3MHz	DPAK	Active	-65°C ~ 150°C
MJD42CRLG	onsemi	PNP	6 A	100 V	1.5V @ 600mA, 6A	1.75 W	3MHz	DPAK	Active	-65°C ~ 150°C
MJD42CT4G	onsemi	PNP	6 A	100 V	1.5V @ 600mA, 6A	1.75 W	3MHz	DPAK	Active	-65°C ~ 150°C
NJVMJD42CRLG	onsemi	PNP	6 A	100 V	1.5V @ 600mA, 6A	1.75 W	3MHz	DPAK	Active	-65°C ~ 150°C
2SA1593S-TL-E	onsemi	PNP	2 A	100 V	600mV @ 100mA, 1A	1 W	120MHz	TP-FA	Active	150°C
2SB1215S-TL-E	onsemi	PNP	3 A	100 V	500mV @ 150mA, 1.5A	1 W	130MHz	TP-FA	Active	150°C
2SB1216S-TL-E	onsemi	PNP	4 A	100 V	500mV @ 200mA, 2A	1 W	130MHz	TP-FA	Obsolete	150°C
2SB1216T-TL-E	onsemi	PNP	4 A	100 V	500mV @ 200mA, 2A	1 W	130MHz	TP-FA	Active	150°C
NSS1C300ET4G	onsemi	PNP	3 A	100 V	400mV @ 300mA, 3A	2.1 W	100MHz	DPAK	Active	-65°C ~ 150°C

Engineering Selection Recommendations

Primary Substitutes for Direct Replacement:

MJD42CG, MJD42CRLG, MJD42CT4G, and NJVMJD42CRLG are parametric equivalents to the KSH42CTF with identical electrical specifications. All four parts are manufactured by onsemi, maintain ROHS3 compliance, and feature extended operating temperature ranges (-65°C to 150°C) compared to the original part. These substitutes are classified as active products, ensuring long-term availability. Selection among these four depends on packaging format requirements: MJD42CG is supplied in tube format, MJD42CRLG and NJVMJD42CRLG in tape & reel, and MJD42CT4G in cut tape with Digi-Reel format.

Secondary Alternatives for Current-Limited Applications:

When circuit design permits reduced collector current specifications, 2SB1215S-TL-E (3 A) and 2SB1216T-TL-E (4 A) provide active product status with higher transition frequencies (130 MHz). These parts use TP-FA packaging rather than DPAK and are suitable for applications where the full 6 A rating is not required. The 2SA1593S-TL-E (2 A) offers the highest transition frequency (120 MHz) but is limited to 2 A collector current.

Alternative with Enhanced Power Handling:

NSS1C300ET4G provides 3 A collector current in DPAK packaging with increased power dissipation capability (2.1 W versus 1.75 W) and extended operating temperature range. This part is suitable for applications requiring improved thermal performance within the 3 A current range.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status, ensuring regulatory equivalence to the original KSH42CTF.

Frequently Asked Questions (FAQ)

Q: Can MJD42CG, MJD42CRLG, MJD42CT4G, and NJVMJD42CRLG be used interchangeably with KSH42CTF?

A: Yes. These four parts are parametric equivalents with identical electrical specifications: 6 A maximum collector current, 100 V breakdown voltage, 1.5 V saturation voltage at rated conditions, 1.75 W power dissipation, and 3 MHz transition frequency. The differences are packaging format (tube, tape & reel, or cut tape) and extended operating temperature range. Circuit performance is electrically identical.

Q: What is the difference between DPAK and TP-FA packaging?

A: DPAK (TO-252-3) and TP-FA are both surface mount packages with 2 leads plus tab. DPAK is the standard package for the KSH42CTF and its primary equivalents. TP-FA is used by the 2SA1593S-TL-E, 2SB1215S-TL-E, 2SB1216S-TL-E, and 2SB1216T-TL-E parts. While both packages have similar form factors, PCB layout and thermal characteristics may differ. Verify footprint compatibility before substitution.

Q: Why do some substitutes have lower current ratings?

A: The 2SA1593S-TL-E (2 A), 2SB1215S-TL-E (3 A), and 2SB1216T-TL-E (4 A) are classified as similar alternatives rather than direct equivalents because they have reduced maximum collector current specifications. These parts are suitable only for circuits designed to operate at or below their rated current levels. Using a lower-rated part in a circuit requiring 6 A operation will result in device failure.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All recommended substitutes maintain ROHS3 compliance, matching the regulatory status of the original KSH42CTF. All parts also carry MSL 1 (unlimited moisture sensitivity level) and REACH unaffected status.

Q: What is the significance of product status (Active versus Obsolete)?

A: Active products are in current production and have guaranteed long-term availability. Obsolete products are no longer manufactured. The KSH42CTF is obsolete, making substitution necessary. MJD42CG, MJD42CRLG, MJD42CT4G, and NJVMJD42CRLG are active equivalents, ensuring continued supply for new designs and production runs.

Q: Can I use NSS1C300ET4G as a direct replacement?

A: NSS1C300ET4G is not a direct replacement due to reduced collector current (3 A versus 6 A) and different power dissipation (2.1 W versus 1.75 W). It is suitable only for applications designed for 3 A operation. However, it offers improved thermal performance and is an active product with extended temperature range.

Q: What determines whether a substitute is acceptable for my application?

A: Acceptable substitutes must meet or exceed the circuit's requirements for maximum collector current, collector-emitter breakdown voltage, saturation voltage, power dissipation, and transition frequency. The KSH42CTF's 6 A rating, 100 V breakdown, and 3 MHz frequency are minimum specifications. Any substitute with lower ratings in these parameters is acceptable only if the circuit design permits operation at the lower specification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message