MJH6284 Equivalent & Substitute Parts

Part Overview

The MJH6284 is a Bipolar (BJT) Transistor NPN - Darlington configuration rated for 100 V collector-emitter breakdown voltage and 20 A maximum collector current. This device is packaged in SOT-93 (TO-218-3) through-hole mounting and delivers 160 W maximum power dissipation with a 4 MHz transition frequency. The MJH6284 is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure long-term component availability for new production and field service applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Darlington	—
Current - Collector (Ic) (Max)	20	A
Voltage - Collector Emitter Breakdown (Max)	100	V
Vce Saturation (Max) @ Ib, Ic	3 V @ 200 mA, 20 A	—
Current - Collector Cutoff (Max)	1	mA
DC Current Gain (hFE) (Min) @ Ic, Vce	750 @ 10 A, 3 V	—
Power - Max	160	W
Frequency - Transition	4	MHz
Operating Temperature Range	-65 to 150	°C (TJ)
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the MJH6284 is determined by electrical and mechanical parameter equivalence. The substitute part must satisfy all of the following criteria:

Transistor Configuration: NPN - Darlington topology
Maximum Collector Current: 20 A minimum
Collector-Emitter Breakdown Voltage: 100 V minimum
Saturation Voltage: 3 V maximum at specified base and collector currents
Collector Cutoff Current: 1 mA maximum
DC Current Gain (hFE): 750 minimum at 10 A collector current and 3 V Vce
Maximum Power Dissipation: 160 W minimum
Transition Frequency: 4 MHz minimum
Operating Temperature Range: -65°C to 150°C minimum
Mounting Type: Through Hole configuration

The MJH6284G meets all electrical parameter requirements and maintains functional equivalence while offering improved product status and compliance certifications.

Parameter Comparison

Parameter	MJH6284 (Main Part)	MJH6284G (Substitute)	Match Status
Manufacturer	onsemi	onsemi	Identical
Transistor Type	NPN - Darlington	NPN - Darlington	Identical
Current - Collector (Ic) (Max)	20 A	20 A	Identical
Voltage - Collector Emitter Breakdown (Max)	100 V	100 V	Identical
Vce Saturation (Max) @ Ib, Ic	3 V @ 200 mA, 20 A	3 V @ 200 mA, 20 A	Identical
Current - Collector Cutoff (Max)	1 mA	1 mA	Identical
DC Current Gain (hFE) (Min) @ Ic, Vce	750 @ 10 A, 3 V	750 @ 10 A, 3 V	Identical
Power - Max	160 W	160 W	Identical
Frequency - Transition	4 MHz	4 MHz	Identical
Operating Temperature Range	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	TO-218-3	TO-247-3	Different
Product Status	Obsolete	Active	Substitute is Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute is Compliant

Engineering Selection Recommendations

The MJH6284G is the direct electrical equivalent of the MJH6284 with identical performance across all specified electrical parameters. Selection of the MJH6284G is supported by the following factors:

Product Status: The MJH6284G maintains Active product status, ensuring continued availability and manufacturer support, whereas the MJH6284 is Obsolete.
Regulatory Compliance: The MJH6284G is ROHS3 Compliant, meeting current environmental and regulatory requirements. The MJH6284 is RoHS non-compliant.
Electrical Equivalence: All electrical parameters including collector current, breakdown voltage, saturation voltage, current gain, power rating, and frequency response are identical.
Thermal Performance: Operating temperature range is identical across both parts.
Package Consideration: The MJH6284G uses TO-247-3 packaging versus the MJH6284 SOT-93 (TO-218-3) packaging. Both are through-hole configurations; however, PCB layout and thermal management design modifications may be required to accommodate the different package footprint.

Frequently Asked Questions (FAQ)

Q: Are the MJH6284 and MJH6284G electrically interchangeable?

A: Yes. Both devices are NPN - Darlington transistors with identical electrical specifications: 20 A maximum collector current, 100 V breakdown voltage, 3 V saturation voltage at rated conditions, 750 minimum hFE, 160 W power rating, and 4 MHz transition frequency. All electrical parameters match exactly.

Q: What is the primary difference between these parts?

A: The primary difference is packaging. The MJH6284 uses SOT-93 (TO-218-3) while the MJH6284G uses TO-247-3. Both are through-hole packages, but the TO-247-3 has a different footprint and pin configuration. PCB layout modifications are required for substitution.

Q: Why should I use the MJH6284G instead of the MJH6284?

A: The MJH6284 is Obsolete with no guaranteed future availability. The MJH6284G is Active and ROHS3 Compliant, meeting current regulatory requirements and ensuring long-term supply chain reliability.

Q: Will the MJH6284G work in my existing circuit designed for the MJH6284?

A: Electrically, yes. However, the different package (TO-247-3 versus TO-218-3) requires PCB layout redesign. Pin assignments and thermal mounting considerations differ between the two packages.

Q: Are there any thermal management differences between these packages?

A: Both packages are rated for 160 W maximum power dissipation and operate across -65°C to 150°C. The TO-247-3 package used in the MJH6284G may offer different thermal characteristics depending on PCB layout and heatsinking implementation.

Q: What is the moisture sensitivity level for the MJH6284G?

A: The MJH6284G has a Moisture Sensitivity Level (MSL) of Not Applicable, indicating no moisture sensitivity restrictions for storage and handling.

Q: Are both parts REACH compliant?

A: Yes. Both the MJH6284 and MJH6284G have REACH Unaffected status.

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