TIP41 NPN Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The TIP41 is an NPN bipolar junction transistor manufactured by onsemi, rated for 40 V collector-emitter breakdown voltage and 6 A maximum collector current in a TO-220-3 through-hole package. The device is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including collector current, power dissipation, and frequency response while accommodating variations in voltage ratings and product status.

Substiute Parts

TIP41

onsemiIn Stock: 1412TIP41 Datasheet

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TIP41AG

onsemiIn Stock: 2427TIP41AG Datasheet

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TIP41BG

onsemiIn Stock: 20347TIP41BG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TIP41 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Compatibility Criteria:

• Transistor Type: NPN (mandatory match)
• Current - Collector (Ic) (Max): 6 A (mandatory match)
• Vce Saturation (Max) @ Ib, Ic: 1.5V @ 600mA, 6A (mandatory match)
• Current - Collector Cutoff (Max): 700µA (mandatory match)
• DC Current Gain (hFE) (Min) @ Ic, Vce: 15 @ 3A, 4V (mandatory match)
• Power - Max: 2 W (mandatory match)
• Frequency - Transition: 3 MHz (mandatory match)
• Mounting Type: Through Hole (mandatory match)
• Package / Case: TO-220-3 (mandatory match)

Secondary Compatibility Criteria (Allowable Variation):

• Voltage - Collector Emitter Breakdown (Max): Equal to or greater than 40 V
• Operating Temperature (TJ): Equal to or greater than 150°C

Substitute parts TIP41AG and TIP41BG satisfy all primary criteria with enhanced voltage ratings (60 V and 80 V respectively) and extended operating temperature ranges, making them suitable replacements in applications where the original TIP41 is no longer available.

Parameter Comparison

Engineering Selection Recommendations

TIP41AG Selection Criteria: TIP41AG is designated as Last Time Buy status with ROHS3 compliance. This part provides a 60 V collector-emitter breakdown rating, exceeding the original TIP41 specification of 40 V. The extended operating temperature range (−65°C to 150°C) accommodates broader environmental conditions. TIP41AG is suitable for applications requiring higher voltage margin while maintaining identical electrical performance across all primary parameters. Inventory availability is 2345 pieces.

TIP41BG Selection Criteria: TIP41BG maintains Active product status with ROHS3 compliance and the highest voltage rating at 80 V collector-emitter breakdown. This part is recommended for new designs and long-term production requirements due to its active status and superior voltage headroom. The extended operating temperature range (−65°C to 150°C) provides enhanced thermal flexibility. All primary electrical parameters remain identical to the original TIP41. Inventory availability is 20300 pieces, indicating sustained supply.

Substitution Logic: Both TIP41AG and TIP41BG are direct functional equivalents of the TIP41 for applications operating at or below 40 V. The enhanced voltage ratings provide additional design margin without compromising performance. Selection between TIP41AG and TIP41BG depends on long-term supply requirements and design voltage headroom preferences. TIP41BG is preferred for new designs due to active product status.

Frequently Asked Questions (FAQ)

Q: Can TIP41AG or TIP41BG be used as direct replacements for TIP41 in existing designs?

A: Yes. Both TIP41AG and TIP41BG are direct functional equivalents for applications operating at or below the original 40 V specification. All primary electrical parameters—collector current, saturation voltage, current gain, power dissipation, and frequency response—are identical. The enhanced voltage ratings (60 V and 80 V respectively) provide additional design margin without affecting circuit operation.

Q: What is the difference between TIP41AG and TIP41BG?

A: The primary differences are collector-emitter breakdown voltage rating (60 V for TIP41AG versus 80 V for TIP41BG) and product status (Last Time Buy for TIP41AG versus Active for TIP41BG). All other electrical parameters are identical. TIP41BG is recommended for new designs due to active status and higher voltage rating.

Q: Are the TO-220-3 packages of TIP41, TIP41AG, and TIP41BG mechanically identical?

A: Yes. All three parts use the TO-220-3 through-hole package with identical mechanical dimensions and pin configuration, enabling direct board-level substitution without layout modifications.

Q: Does the extended operating temperature range of TIP41AG and TIP41BG affect circuit performance?

A: The extended operating temperature range (−65°C to 150°C for both TIP41AG and TIP41BG versus 150°C maximum for TIP41) does not affect circuit performance within the original TIP41 operating envelope. The lower temperature limit provides additional environmental flexibility without impact on electrical characteristics.

Q: Are TIP41AG and TIP41BG RoHS compliant?

A: Yes. Both TIP41AG and TIP41BG are ROHS3 compliant. The original TIP41 RoHS status is not specified in the provided documentation.

Q: Which substitute part should be selected for new production designs?

A: TIP41BG is recommended for new production designs due to its Active product status, ensuring sustained long-term availability. The 80 V collector-emitter breakdown rating provides superior voltage margin compared to the original 40 V specification.