KSH44H11TM Equivalent & Substitute Parts

Part Overview

The KSH44H11TM is an NPN bipolar junction transistor manufactured by onsemi, housed in a DPAK (TO-252-3) surface mount package. This component is rated for 80 V collector-emitter breakdown voltage with a maximum collector current of 8 A and maximum power dissipation of 1.75 W. The KSH44H11TM is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain electrical and mechanical compatibility while offering improved availability and active product status.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	8	A
Voltage - Collector Emitter Breakdown (Max)	80	V
Vce Saturation (Max) @ Ib, Ic	1 V @ 400 mA, 8 A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 4 A, 1 V	—
Power - Max	1.75	W
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Operating Temperature (Max)	150	°C (TJ)
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the KSH44H11TM are classified based on strict electrical and mechanical parameter matching. All substitute parts maintain the following critical parameters identical to the main part:

Transistor Type: NPN
Current - Collector (Ic) (Max): 8 A
Voltage - Collector Emitter Breakdown (Max): 80 V
Vce Saturation (Max) @ Ib, Ic: 1 V @ 400 mA, 8 A
DC Current Gain (hFE) (Min) @ Ic, Vce: 40 @ 4 A, 1 V
Mounting Type: Surface Mount
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories: Direct Manufacturer Substitutes (onsemi MJD44 series with active product status) and Cross-Manufacturer Substitutes (STMicroelectronics MJD44H11T4 variants). Variations in frequency-transition specifications, power ratings, and operating temperature ranges do not preclude substitution when the core electrical parameters remain within specification.

Parameter Comparison

Parameter	KSH44H11TM	MJD44H11T4G	NJVMJD44H11T4G-VF01	MJD44H11G	MJD44H11RLG	MJD44H11T4 (STM)	MJD44H11T4-A (STM)
Manufacturer	onsemi	onsemi	onsemi	onsemi	onsemi	STMicroelectronics	STMicroelectronics
Product Status	Obsolete	Active	Obsolete	Active	Active	Active	Active
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN	NPN
Current - Collector (Ic) (Max)	8 A	8 A	8 A	8 A	8 A	8 A	8 A
Voltage - Collector Emitter Breakdown (Max)	80 V	80 V	80 V	80 V	80 V	80 V	80 V
Vce Saturation (Max) @ Ib, Ic	1 V @ 400 mA, 8 A	1 V @ 400 mA, 8 A	1 V @ 400 mA, 8 A	1 V @ 400 mA, 8 A	1 V @ 400 mA, 8 A	1 V @ 400 mA, 8 A	1 V @ 400 mA, 8 A
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 4 A, 1 V	40 @ 4 A, 1 V	40 @ 4 A, 1 V	40 @ 4 A, 1 V	40 @ 4 A, 1 V	40 @ 4 A, 1 V	40 @ 4 A, 1 V
Power - Max	1.75 W	1.75 W	1.75 W	1.75 W	1.75 W	20 W	20 W
Frequency - Transition	50 MHz	85 MHz	85 MHz	85 MHz	85 MHz	—	—
Operating Temperature (Max)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)
Operating Temperature (Min)	—	-55°C (TJ)	-55°C (TJ)	-55°C (TJ)	-55°C (TJ)	—	—
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Type	—	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Primary Substitute: MJD44H11T4G (onsemi)

The MJD44H11T4G is the recommended primary substitute for the obsolete KSH44H11TM. This part is manufactured by onsemi, the original manufacturer of the KSH44H11TM, and maintains identical electrical specifications across all critical parameters. The MJD44H11T4G holds active product status with substantial inventory availability (157,800 pcs), ensuring long-term supply continuity. The part is ROHS3 compliant and carries MSL 1 rating, matching the original part's environmental compliance profile.

Secondary Substitutes: MJD44H11G and MJD44H11RLG (onsemi)

Both MJD44H11G and MJD44H11RLG are active onsemi products that maintain full electrical compatibility with the KSH44H11TM. These parts differ only in packaging format (Tube for MJD44H11G; Cut Tape & Digi-Reel for MJD44H11RLG) and offer higher inventory levels. Selection between these variants depends on procurement and assembly requirements.

Cross-Manufacturer Alternatives: MJD44H11T4 and MJD44H11T4-A (STMicroelectronics)

The STMicroelectronics MJD44H11T4 and MJD44H11T4-A variants provide cross-manufacturer substitution options. These parts maintain electrical compatibility with the KSH44H11TM across all core parameters. The STMicroelectronics variants feature enhanced power dissipation ratings (20 W versus 1.75 W), providing additional thermal margin in applications. Both variants are active products with adequate inventory availability.

Obsolete Alternatives: NJVMJD44H11T4G-VF01

The NJVMJD44H11T4G-VF01 is an onsemi product with obsolete status and limited inventory (902 pcs). This part maintains full electrical compatibility but should not be selected for new designs due to product status and inventory constraints.

Frequently Asked Questions (FAQ)

Q: Can the MJD44H11T4G directly replace the KSH44H11TM without circuit modifications?

A: Yes. The MJD44H11T4G maintains identical electrical specifications for all critical parameters: 8 A maximum collector current, 80 V collector-emitter breakdown voltage, 1 V saturation voltage at specified conditions, and 40 minimum DC current gain. The DPAK package pinout is identical. No circuit modifications are required.

Q: What is the difference between MJD44H11G and MJD44H11RLG?

A: Both parts are electrically identical and maintain full compatibility with the KSH44H11TM. The difference is packaging format: MJD44H11G is supplied in Tube packaging, while MJD44H11RLG is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly line requirements and procurement preferences.

Q: Why do the STMicroelectronics MJD44H11T4 variants show 20 W power rating instead of 1.75 W?

A: The power rating difference reflects different thermal management specifications between manufacturers. Both parts maintain the same electrical performance specifications required for substitution. The higher power rating in STMicroelectronics variants indicates enhanced thermal capability, which provides additional design margin in applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, matching the original KSH44H11TM specification. All parts carry MSL 1 (Unlimited) moisture sensitivity rating.

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

A: onsemi variants (MJD44H11T4G, MJD44H11G, MJD44H11RLG) specify -55°C to 150°C operating range. STMicroelectronics variants (MJD44H11T4, MJD44H11T4-A) specify maximum 150°C junction temperature. The original KSH44H11TM specifies maximum 150°C only. Verify application temperature requirements against specific part datasheets.

Q: Is the NJVMJD44H11T4G-VF01 suitable for new production?

A: No. The NJVMJD44H11T4G-VF01 carries obsolete product status with limited inventory (902 pcs). For new designs and ongoing production, select from active products: MJD44H11T4G, MJD44H11G, MJD44H11RLG, or the STMicroelectronics variants.

Q: Can I use MJD44H11T4 or MJD44H11T4-A from STMicroelectronics in existing KSH44H11TM applications?

A: Yes. Both STMicroelectronics variants maintain electrical compatibility across all critical parameters. The DPAK package is identical. The enhanced power rating (20 W) provides additional thermal margin. Verify availability and lead time requirements with your supplier.

Q: What inventory levels are available for each substitute?

A: MJD44H11T4G (onsemi): 157,800 pcs; MJD44H11G (onsemi): 109,325 pcs; MJD44H11RLG (onsemi): 35,000 pcs; MJD44H11T4 (STMicroelectronics): 32,900 pcs; MJD44H11T4-A (STMicroelectronics): 2,248 pcs. Inventory levels are subject to change; verify current availability with your component supplier.

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