KSH41CTM Equivalent & Substitute Parts

Part Overview

The KSH41CTM is an NPN 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 design support and production continuity. The KSH41CTM serves in applications requiring moderate-frequency switching and amplification at moderate power levels, with a maximum power dissipation of 1.75 W and transition frequency of 3 MHz.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	100	V
Current - Collector (Ic) (Max)	6	A
Power - Max	1.75	W
Frequency - Transition	3	MHz
Vce Saturation (Max) @ Ib, Ic	1.5 V @ 600 mA, 6 A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 3 A, 4 V	—
Operating Temperature (Max)	150	°C
Package / Case	TO-252-3, DPAK	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitute parts for the KSH41CTM are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 100 V collector-emitter breakdown voltage, 6 A maximum collector current, 1.75 W power dissipation, 3 MHz transition frequency, 1.5 V saturation voltage at rated conditions, and 15 minimum DC current gain. These parts are direct replacements with no circuit redesign required. Parametric equivalents include MJD41CT4G and MJD41CRLG, both from onsemi, differing only in packaging format (Tape & Reel versus Cut Tape).

Similar Substitutes share the same package type (TO-252-3 DPAK surface mount) and voltage rating (100 V) but differ in current-handling capability, power dissipation, or frequency response. These parts are suitable when circuit requirements permit reduced current capacity or when higher frequency performance is beneficial. Similar substitutes include MJD31CG, MJD31CRLG, and MJD31CT4G (3 A rated current), 2SC4134T-TL-E and 2SC4135T-TL-E (1 A to 2 A rated current with higher frequency), and MJD31C-13 from Diodes Incorporated (3 A rated current). The part PHPT61006NYX from Nexperia USA Inc. represents a cross-manufacturer option with 6 A current rating but different package geometry (LFPAK56, Power-SO8) and higher frequency capability (170 MHz).

Substitution logic is based strictly on the following allowed parameters: collector-emitter breakdown voltage, maximum collector current, power dissipation, transition frequency, saturation voltage, DC current gain, operating temperature range, package type, and mounting method.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) [A]	Vce(br) [V]	Power [W]	fT [MHz]	Vce Sat [V]	hFE (Min)	Package	Status
KSH41CTM	onsemi	6	100	1.75	3	1.5 @ 600mA, 6A	15 @ 3A, 4V	TO-252-3 DPAK	Obsolete
MJD41CT4G	onsemi	6	100	1.75	3	1.5 @ 600mA, 6A	15 @ 3A, 4V	TO-252-3 DPAK	Active
MJD41CRLG	onsemi	6	100	1.75	3	1.5 @ 600mA, 6A	15 @ 3A, 4V	TO-252-3 DPAK	Active
MJD31CG	onsemi	3	100	1.56	3	1.2 @ 375mA, 3A	10 @ 3A, 4V	TO-252-3 DPAK	Active
MJD31CRLG	onsemi	3	100	1.56	3	1.2 @ 375mA, 3A	10 @ 3A, 4V	TO-252-3 DPAK	Active
MJD31CT4G	onsemi	3	100	1.56	3	1.2 @ 375mA, 3A	10 @ 3A, 4V	TO-252-3 DPAK	Active
MJD31C-13	Diodes Incorporated	3	100	1.56	3	1.2 @ 375mA, 3A	10 @ 3A, 4V	TO-252-3 DPAK	Active
2SC4134T-TL-E	onsemi	1	100	0.8	120	0.4 @ 40mA, 400mA	200 @ 100mA, 5V	TO-252-3 DPAK	Active
2SC4135T-TL-E	onsemi	2	100	1	120	0.4 @ 100mA, 1A	200 @ 100mA, 5V	TO-252-3 DPAK	Active
2SC4135S-TL-E	onsemi	2	100	1	120	0.4 @ 100mA, 1A	140 @ 100mA, 5V	TO-252-3 DPAK	Obsolete
PHPT61006NYX	Nexperia USA Inc.	6	100	1.3	170	0.34 @ 600mA, 6A	140 @ 500mA, 2V	SC-100 LFPAK56	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents):

MJD41CT4G and MJD41CRLG are parametric equivalents to the KSH41CTM. Both parts are manufactured by onsemi and maintain identical electrical specifications: 6 A collector current, 100 V breakdown voltage, 1.75 W power dissipation, 3 MHz transition frequency, and identical saturation and gain characteristics. Both are RoHS3 compliant and carry active product status. Selection between these two depends on packaging requirements: MJD41CT4G is supplied in Tape & Reel format with 42,948 units in stock, while MJD41CRLG is supplied in Cut Tape format with 1,310 units in stock. Either part provides complete functional and electrical compatibility without circuit modification.

Current-Reduced Substitutes (Same Package, Lower Current Rating):

MJD31CG, MJD31CRLG, and MJD31CT4G from onsemi, along with MJD31C-13 from Diodes Incorporated, are suitable substitutes when circuit requirements permit operation at 3 A maximum collector current instead of 6 A. All four parts maintain the 100 V voltage rating, 3 MHz transition frequency, and TO-252-3 DPAK package. Power dissipation is reduced to 1.56 W. All four parts carry active product status and RoHS3 compliance. MJD31CT4G offers the highest inventory availability at 35,200 units. These substitutes are appropriate for applications where the 6 A capability of the KSH41CTM is not fully utilized.

Higher-Frequency Substitutes (Same Voltage, Reduced Current):

2SC4134T-TL-E and 2SC4135T-TL-E from onsemi provide higher transition frequency (120 MHz) compared to the KSH41CTM (3 MHz), with reduced current ratings of 1 A and 2 A respectively. Both maintain the 100 V voltage rating and TO-252-3 DPAK package. 2SC4134T-TL-E is active with 642 units in stock; 2SC4135T-TL-E is active with 1,451 units in stock. These parts are suitable for applications requiring faster switching performance at lower current levels.

Cross-Manufacturer Alternative (Different Package):

PHPT61006NYX from Nexperia USA Inc. maintains the 6 A current rating and 100 V voltage rating but uses a different package (SC-100 LFPAK56, Power-SO8) and offers significantly higher transition frequency (170 MHz). This part is AEC-Q100 qualified for automotive applications and carries active product status with 2,360 units in stock. Package substitution requires PCB layout modification and is appropriate only when the alternative package geometry is acceptable.

Frequently Asked Questions (FAQ)

Q: Can MJD41CT4G directly replace KSH41CTM without circuit modification?

A: Yes. MJD41CT4G is a parametric equivalent with identical electrical specifications across all critical parameters: 6 A collector current, 100 V breakdown voltage, 1.75 W power dissipation, 3 MHz transition frequency, 1.5 V saturation voltage, and 15 minimum DC current gain. The TO-252-3 DPAK package is identical. No circuit redesign is required.

Q: What is the difference between MJD41CT4G and MJD41CRLG?

A: Both parts are parametric equivalents with identical electrical specifications. The difference is packaging format: MJD41CT4G is supplied in Tape & Reel format, while MJD41CRLG is supplied in Cut Tape format. Selection depends on assembly process requirements and inventory availability.

Q: Can I use MJD31CT4G as a substitute for KSH41CTM?

A: MJD31CT4G is a similar substitute suitable only if circuit requirements permit operation at 3 A maximum collector current instead of 6 A. The part maintains the same 100 V voltage rating, 3 MHz transition frequency, and TO-252-3 DPAK package. Power dissipation is reduced from 1.75 W to 1.56 W. Use this substitute only when the application does not require the full 6 A capability.

Q: Why would I choose 2SC4135T-TL-E over MJD41CT4G?

A: 2SC4135T-TL-E offers 120 MHz transition frequency compared to 3 MHz for MJD41CT4G, making it suitable for applications requiring faster switching. However, 2SC4135T-TL-E is limited to 2 A collector current versus 6 A for MJD41CT4G. This substitute is appropriate only for lower-current, higher-frequency applications.

Q: Is PHPT61006NYX compatible with the KSH41CTM footprint?

A: No. PHPT61006NYX uses a different package (SC-100 LFPAK56, Power-SO8) compared to the KSH41CTM (TO-252-3 DPAK). PCB layout and footprint modification is required. This part is suitable only when the alternative package geometry can be accommodated in the design.

Q: What is the product status of available substitutes?

A: MJD41CT4G and MJD41CRLG are active products. MJD31CG, MJD31CRLG, and MJD31CT4G are active. MJD31C-13 from Diodes Incorporated is active. 2SC4134T-TL-E and 2SC4135T-TL-E are active. PHPT61006NYX is active. All recommended substitutes carry active product status, ensuring long-term availability and supply continuity.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status. MJD41CT4G, MJD41CRLG, MJD31CG, MJD31CRLG, MJD31CT4G, 2SC4134T-TL-E, 2SC4135T-TL-E, and PHPT61006NYX are all RoHS3 compliant.

Q: What is the operating temperature range for substitute parts?

A: onsemi parts (MJD41CT4G, MJD41CRLG, MJD31CG, MJD31CRLG, MJD31CT4G, 2SC4134T-TL-E, 2SC4135T-TL-E) operate from −65°C to 150°C junction temperature. MJD31C-13 from Diodes Incorporated operates from −55°C to 150°C. PHPT61006NYX from Nexperia operates to 175°C junction temperature. All parts exceed the KSH41CTM maximum operating temperature of 150°C.

Q: Which substitute offers the best inventory availability?

A: MJD31CT4G offers the highest inventory with 35,200 units in stock. MJD41CT4G offers 42,948 units in stock. Both are suitable for high-volume production requirements.

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