TIP41B Equivalent & Substitute Parts

Part Overview

The TIP41B is an NPN bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. It features a maximum collector current of 6 A, collector-emitter breakdown voltage of 80 V, and maximum power dissipation of 2 W in a Through Hole TO-220-3 package. The TIP41B is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	6	A
Voltage - Collector Emitter Breakdown (Max)	80	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
Package / Case	TO-220-3	—
Mounting Type	Through Hole	—
Operating Temperature (Max)	150	°C (TJ)

Substitute Part Grouping Explanation

Substitution of the TIP41B is determined by electrical and mechanical parameter equivalence. The following criteria establish valid substitution:

Electrical Parameters (Must Match):

Transistor Type: NPN
Current - Collector (Ic) (Max): 6 A
Voltage - Collector Emitter Breakdown (Max): 80 V
Vce Saturation (Max) @ Ib, Ic: 1.5V @ 600mA, 6A
Current - Collector Cutoff (Max): 700µA
DC Current Gain (hFE) (Min) @ Ic, Vce: 15 @ 3A, 4V
Power - Max: 2 W
Frequency - Transition: 3 MHz

Mechanical Parameters (Must Match):

Package / Case: TO-220-3
Mounting Type: Through Hole

The TIP41BG meets all electrical and mechanical equivalence criteria and is classified as an active product, providing direct substitution capability for the obsolete TIP41B.

Parameter Comparison

Parameter	TIP41B	TIP41BG	Match
Transistor Type	NPN	NPN	✓
Current - Collector (Ic) (Max)	6 A	6 A	✓
Voltage - Collector Emitter Breakdown (Max)	80 V	80 V	✓
Vce Saturation (Max) @ Ib, Ic	1.5V @ 600mA, 6A	1.5V @ 600mA, 6A	✓
Current - Collector Cutoff (Max)	700µA	700µA	✓
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	✓
Package / Case	TO-220-3	TO-220-3	✓
Mounting Type	Through Hole	Through Hole	✓
Operating Temperature (Max)	150°C (TJ)	150°C (TJ)	✓
Product Status	Obsolete	Active	—

Engineering Selection Recommendations

The TIP41BG is the direct equivalent substitute for the TIP41B. Both parts share identical electrical specifications and mechanical packaging, ensuring functional interchangeability in circuit applications.

Product Status Consideration: The TIP41B is classified as obsolete, while the TIP41BG maintains active product status. This distinction makes the TIP41BG the appropriate selection for new designs and ongoing procurement requirements.

Compliance Status: The TIP41BG is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution. Both parts carry EAR99 export classification and identical HTSUS coding.

Packaging Difference: The TIP41B is supplied in standard packaging, while the TIP41BG is supplied in tube packaging. This packaging variation does not affect electrical performance or mechanical compatibility in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the TIP41BG directly replace the TIP41B in existing designs?

A: Yes. The TIP41BG provides complete electrical and mechanical equivalence to the TIP41B. All critical parameters including collector current, breakdown voltage, saturation characteristics, and gain specifications are identical. The TO-220-3 package and Through Hole mounting type are unchanged.

Q: What is the primary reason for substituting the TIP41B?

A: The TIP41B is classified as obsolete. The TIP41BG is the active equivalent part from the same manufacturer, ensuring continued availability and supply chain reliability.

Q: Are there differences in operating temperature range between the two parts?

A: The maximum operating temperature is identical at 150°C (TJ) for both parts. The TIP41BG specifies an extended minimum operating temperature of -65°C, providing a wider operating range than the TIP41B specification.

Q: Does the tube packaging of the TIP41BG affect circuit performance?

A: No. Packaging format does not affect electrical performance or mechanical compatibility. Tube packaging is a supply format consideration only and does not impact device functionality or circuit integration.

Q: Are both parts compliant with current regulatory standards?

A: The TIP41BG is ROHS3 compliant and REACH unaffected. The TIP41B carries REACH unaffected status. Both parts are classified as EAR99 for export purposes.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by matching transistor type (NPN), maximum collector current (6 A), collector-emitter breakdown voltage (80 V), saturation voltage (1.5V @ 600mA, 6A), collector cutoff current (700µA), DC current gain (15 @ 3A, 4V), maximum power dissipation (2 W), and transition frequency (3 MHz).

Q: Is the TO-220-3 package identical between both parts?

A: Yes. Both the TIP41B and TIP41BG use the TO-220-3 package with Through Hole mounting. This ensures mechanical compatibility with existing PCB layouts and thermal management solutions.

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