2N3741 Equivalent & Substitute Parts Reference

Part Overview

The 2N3741 is a bipolar (BJT) transistor featuring an 80 V collector-emitter breakdown voltage, a maximum collector current of 4 A, a 4 MHz transition frequency, and a maximum power dissipation of 25 W. It is supplied in a TO-66 through-hole package and is classified as obsolete. As the 2N3741 is no longer in production, identifying suitable equivalent or substitute transistor models is necessary for maintaining legacy designs or performing equipment repairs where direct replacement is required.

Key Parameters

Parameter	2N3741 Value
Manufacturer	Central Semiconductor Corp
Category	Transistors, Bipolar (BJT)
Type	Not Provided
Voltage - Collector Emitter Breakdown (Max)	80 V
Current - Collector (Ic) (Max)	4 A
Vce Saturation (Max) @ Ib, Ic	600mV @ 125mA, 1A
Current - Collector Cutoff (Max)	1mA
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 100mA, 1V
Power - Max	25 W
Frequency - Transition	4MHz
Operating Temperature	-65°C ~ 200°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-213AA, TO-66-2
Supplier Device Package	TO-66
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.29.0095
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute selection is based strictly on the following key electrical and mechanical parameters: collector-emitter breakdown voltage, maximum collector current, Vce saturation voltage, collector cutoff current, DC current gain, maximum power, transition frequency, operating temperature, mounting type, and package/case compatibility. Substitute parts must match or exceed these specifications within the allowed values and be available in the same through-hole TO-66 (TO-213AA) package.

Parameter Comparison

Parameter	2N3741 (Central Semiconductor Corp)	2N3741A (Microchip Technology)
Category	Transistors, Bipolar (BJT)	Transistors, Bipolar (BJT)
Transistor Type	Not Provided	PNP
Voltage - Collector Emitter Breakdown (Max)	80 V	80 V
Current - Collector (Ic) (Max)	4 A	4 A
Vce Saturation (Max) @ Ib, Ic	600mV @ 125mA, 1A	600mV @ 125mA, 1A
Current - Collector Cutoff (Max)	1mA	1µA
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 100mA, 1V	40 @ 100mA, 1V
Power - Max	25 W	25 W
Frequency - Transition	4MHz	3MHz
Operating Temperature	-65°C ~ 200°C (TJ)	-65°C ~ 200°C (TJ)
Mounting Type	Through Hole	Through Hole
Package / Case	TO-213AA, TO-66-2	TO-213AA, TO-66-2
Supplier Device Package	TO-66	TO-66 (TO-213AA)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active
RoHS Status	Not Provided	RoHS non-compliant
ECCN	EAR99	EAR99
HTSUS	8541.29.0095	8541.29.0095

Engineering Selection Recommendations

Selection between 2N3741 and substitute 2N3741A is determined by product status and regulatory compliance. The 2N3741 is obsolete, requiring the use of alternatives for ongoing production and maintenance. The 2N3741A is active and available in inventory, but is designated as RoHS non-compliant. Both products are classified as REACH unaffected and assigned ECCN EAR99 and HTSUS 8541.29.0095. Choose according to required compliance with current RoHS directives and inventory availability.

Frequently Asked Questions (FAQ)

Q1: What key parameters are required for choosing an equivalent BJT transistor for 2N3741?
A1: The equivalent must match the voltage-collector emitter breakdown (max), collector current (max), Vce saturation (max), collector cutoff current (max), DC current gain (min), maximum power, transition frequency, operating temperature range, mounting type, and package/case.

Q2: Is mechanical compatibility guaranteed between 2N3741 and 2N3741A?
A2: Both use the TO-66 (TO-213AA) through-hole package, ensuring direct mechanical interchangeability.

Q3: How does RoHS compliance impact substitute selection?
A3: The 2N3741A is RoHS non-compliant. Selection must account for regulatory requirements relevant to the end product’s destination or industry standards.

Q4: Are electrical characteristics fully matched?
A4: All key parameters provided are matched within the specified ranges, except the transition frequency—2N3741A's 3 MHz versus the main part's 4 MHz.

Q5: Can the 2N3741A be used in legacy designs using 2N3741?
A5: The 2N3741A is provided as a substitute part with matched electrical ratings and identical package specifications, based strictly on the allowed parameters given.

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