MJB41C Equivalent & Substitute Parts

Part Overview

The MJB41C is an NPN bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 6 A, collector-emitter breakdown voltage of 100 V, and maximum power dissipation of 2 W in a surface mount D2PAK package. The MJB41C is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The MJB41CG serves as the direct functional equivalent with identical electrical specifications and improved product status.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	6	A
Voltage - Collector Emitter Breakdown (Max)	100	V
Vce Saturation (Max) @ Ib, Ic	1.5V @ 600mA, 6A	V
Current - Collector Cutoff (Max)	700	µA
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 3A, 4V	—
Power - Max	2	W
Frequency - Transition	3	MHz
Operating Temperature Range	-65 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	—

Substitute Part Grouping Explanation

Substitution of the MJB41C with the MJB41CG is based on electrical and mechanical parameter equivalence. Both parts share identical specifications across all critical performance parameters: maximum collector current (6 A), collector-emitter breakdown voltage (100 V), saturation voltage (1.5 V @ 600mA, 6A), collector cutoff current (700 µA), DC current gain (15 @ 3A, 4V), maximum power dissipation (2 W), transition frequency (3 MHz), and operating temperature range (-65°C to 150°C). Both devices utilize the same surface mount D2PAK package configuration (TO-263-3, TO-263AB). The substitution is valid because the MJB41CG maintains full electrical and mechanical compatibility with the MJB41C while offering improved product status and compliance certifications.

Parameter Comparison

Parameter	MJB41C	MJB41CG	Match
Transistor Type	NPN	NPN	✓
Current - Collector (Ic) (Max)	6 A	6 A	✓
Voltage - Collector Emitter Breakdown (Max)	100 V	100 V	✓
Vce Saturation (Max) @ Ib, Ic	1.5V @ 600mA, 6A	1.5V @ 600mA, 6A	✓
Current - Collector Cutoff (Max)	700 µA	700 µA	✓
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 3A, 4V	15 @ 3A, 4V	✓
Power - Max	2 W	2 W	✓
Frequency - Transition	3 MHz	3 MHz	✓
Operating Temperature Range	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	✓
Product Status	Obsolete	Active	—
RoHS Status	RoHS non-compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

The MJB41CG is the direct substitute for the MJB41C in all applications requiring NPN bipolar junction transistor functionality with 6 A collector current and 100 V breakdown voltage ratings. Selection of the MJB41CG is supported by three primary factors: (1) complete electrical parameter equivalence across all specified ratings, (2) active product status ensuring ongoing availability and manufacturing support, and (3) ROHS3 compliance certification, which addresses regulatory requirements for new designs and production environments subject to RoHS directives. The MJB41CG maintains identical D2PAK surface mount packaging, enabling direct board-level substitution without layout modifications. For applications where RoHS compliance is not a requirement, the MJB41C remains functionally equivalent; however, the MJB41CG is preferred for new designs and long-term production continuity.

Frequently Asked Questions (FAQ)

Q: Can the MJB41CG be used as a direct replacement for the MJB41C in existing designs?

A: Yes. The MJB41CG provides complete electrical and mechanical compatibility with the MJB41C. All performance parameters, including collector current, breakdown voltage, saturation characteristics, gain, power rating, and operating temperature range, are identical. The D2PAK package configuration is unchanged, permitting direct substitution without circuit board redesign.

Q: What is the primary difference between the MJB41C and MJB41CG?

A: The MJB41C is classified as obsolete, while the MJB41CG maintains active product status. Additionally, the MJB41CG is ROHS3 compliant, whereas the MJB41C is RoHS non-compliant. Electrically and mechanically, both parts are equivalent.

Q: Are there packaging differences between these parts?

A: Both the MJB41C and MJB41CG are supplied in D2PAK surface mount packages (TO-263-3, TO-263AB configuration). The primary packaging difference is the supplier device package designation: MJB41C uses standard D2PAK, while MJB41CG is supplied in Tube packaging. This does not affect electrical performance or board-level compatibility.

Q: Is the MJB41CG suitable for applications requiring RoHS compliance?

A: Yes. The MJB41CG is ROHS3 compliant, making it suitable for applications and markets requiring RoHS certification. The MJB41C is RoHS non-compliant and should not be used in applications with RoHS requirements.

Q: What are the critical electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by matching the following parameters: transistor type (NPN), maximum collector current (6 A), collector-emitter breakdown voltage (100 V), saturation voltage (1.5V @ 600mA, 6A), collector cutoff current (700 µA), DC current gain (15 @ 3A, 4V), maximum power dissipation (2 W), transition frequency (3 MHz), and operating temperature range (-65°C to 150°C). The MJB41CG matches all these specifications with the MJB41C.

Q: Can the MJB41CG be used in high-frequency switching applications?

A: The MJB41CG has a transition frequency of 3 MHz, which defines its frequency response capability. Applications requiring switching frequencies above this specification require alternative device selection.

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