TIP41CTU Equivalent & Substitute Parts

Part Overview

The TIP41CTU is an NPN bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 6 A maximum collector current. This device is packaged in TO-220-3 through-hole configuration and is designed for general-purpose switching and amplification applications. The TIP41CTU is classified as obsolete; however, equivalent and substitute parts remain available from active product lines. Identifying suitable alternatives is necessary to maintain design continuity and ensure component availability for new production and repair applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	100	V
Current - Collector (Ic) (Max)	6	A
Power - Max	2	W
Frequency - Transition	3	MHz
Vce Saturation (Max) @ Ib, Ic	1.5V @ 600mA, 6A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 3A, 4V	—
Package / Case	TO-220-3	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the TIP41CTU is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Transistor Type: NPN
Voltage - Collector Emitter Breakdown (Max): 100 V
Current - Collector (Ic) (Max): 6 A
Frequency - Transition: 3 MHz
Package / Case: TO-220-3
Mounting Type: Through Hole

Direct Equivalents maintain all primary parameters and are suitable for one-to-one replacement without circuit modification.

Parametric Equivalents maintain all primary parameters but may differ in secondary characteristics such as power dissipation capability, operating temperature range, or manufacturer source. These parts are electrically compatible but may require thermal design review.

Similar Parts share the same voltage rating and package but differ in maximum collector current or power rating. These parts are suitable only when circuit current requirements are lower than the original specification.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) [A]	Vce(br) [V]	Power [W]	hFE (Min) @ Ic, Vce	Package	Product Status
TIP41CTU	onsemi	6	100	2	15 @ 3A, 4V	TO-220-3	Obsolete
BD243CG	onsemi	6	100	65	15 @ 3A, 4V	TO-220-3	Active
TIP41CG	onsemi	6	100	2	15 @ 3A, 4V	TO-220-3	Active
TIP41C	NTE Electronics, Inc	6	100	2	15 @ 3A, 4V	TO-220-3	Active
TIP41C-BP	Micro Commercial Co	6	100	2	15 @ 3A, 4V	TO-220-3	Active
BD241CG	onsemi	3	100	40	25 @ 1A, 4V	TO-220-3	Active
TIP29CG	onsemi	1	100	2	15 @ 1A, 4V	TO-220-3	Active
TIP31CG	onsemi	3	100	2	10 @ 3A, 4V	TO-220-3	Active
BD911	NTE Electronics, Inc	15	100	90	40 @ 500mA, 4V	TO-220-3	Active

Engineering Selection Recommendations

Direct Replacement (One-to-One Substitution):

The following parts are direct equivalents to the TIP41CTU and require no circuit modification:

TIP41CG (onsemi): Identical electrical specifications. Active product status. RoHS3 compliant. Recommended as primary replacement.
TIP41C (NTE Electronics, Inc): Identical electrical specifications. Active product status. RoHS3 compliant. Alternative source for supply chain redundancy.
TIP41C-BP (Micro Commercial Co): Identical electrical specifications. Active product status. RoHS3 compliant. Alternative source with TO-220AB package variant.

Enhanced Performance Alternative:

BD243CG (onsemi): Maintains all primary electrical parameters (6 A, 100 V, 3 MHz) but provides 65 W power dissipation versus 2 W. Active product status. RoHS3 compliant. Suitable for applications requiring improved thermal performance without circuit redesign.

Reduced Current Applications:

The following parts are suitable only when circuit design permits reduced maximum collector current:

BD241CG (onsemi): 3 A maximum collector current, 100 V rating, 40 W power dissipation. Active product status. RoHS3 compliant.
TIP31CG (onsemi): 3 A maximum collector current, 100 V rating, 2 W power dissipation. Active product status. RoHS3 compliant.
TIP29CG (onsemi): 1 A maximum collector current, 100 V rating, 2 W power dissipation. Active product status. RoHS3 compliant.

Higher Current Alternative:

BD911 (NTE Electronics, Inc): 15 A maximum collector current, 100 V rating, 90 W power dissipation. Active product status. RoHS non-compliant. Suitable for applications requiring higher current handling capacity.

Frequently Asked Questions (FAQ)

Q: Can TIP41CG be used as a direct replacement for TIP41CTU?

A: Yes. TIP41CG is a direct equivalent. Both devices share identical electrical specifications: 6 A maximum collector current, 100 V collector-emitter breakdown voltage, 2 W power dissipation, 3 MHz transition frequency, and TO-220-3 package. TIP41CG is an active product from onsemi and is RoHS3 compliant.

Q: What is the difference between TIP41CG and BD243CG?

A: Both parts maintain the same primary electrical parameters (6 A, 100 V, 3 MHz). The primary difference is power dissipation: BD243CG is rated for 65 W versus 2 W for TIP41CG. BD243CG is suitable for applications requiring higher thermal performance. Both are onsemi products with active status and RoHS3 compliance.

Q: Can BD241CG replace TIP41CTU in all applications?

A: No. BD241CG has a maximum collector current of 3 A, compared to 6 A for TIP41CTU. BD241CG is suitable only for applications where circuit current requirements do not exceed 3 A. Voltage rating (100 V) and package (TO-220-3) are compatible.

Q: Is TIP41C from NTE Electronics equivalent to TIP41CG from onsemi?

A: Yes. Both parts are electrically equivalent with identical specifications: 6 A, 100 V, 2 W, 3 MHz, TO-220-3 package. The difference is manufacturer source. Both are active products with RoHS3 compliance. Selection between them depends on supply chain availability and procurement requirements.

Q: What is the significance of the TO-220-3 package designation?

A: TO-220-3 indicates a three-lead through-hole package with standardized pin configuration and thermal characteristics. All substitute parts listed maintain this package type, ensuring mechanical and thermal compatibility without PCB redesign.

Q: Can BD911 be used as a substitute for TIP41CTU?

A: BD911 maintains the 100 V voltage rating and TO-220-3 package but provides 15 A maximum collector current and 90 W power dissipation. BD911 is suitable for applications requiring higher current capacity. However, BD911 is RoHS non-compliant, which may restrict use in regulated applications. Circuit redesign may be necessary to accommodate different saturation voltage characteristics.

Q: What does "Active" product status mean compared to "Obsolete"?

A: Active product status indicates the part is currently manufactured and available from the supplier. Obsolete status indicates the part is no longer manufactured. All substitute parts listed have active status, ensuring long-term availability for new designs and production runs.

Q: Are all substitute parts RoHS3 compliant?

A: Most substitute parts are RoHS3 compliant. BD911 is RoHS non-compliant. RoHS compliance is required for applications subject to European Union Restriction of Hazardous Substances regulations. Verify compliance requirements for your specific application before part selection.

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