TIP142 NPN Darlington Transistor Equivalent & Substitute Parts

Part Overview

The TIP142 is an NPN Darlington bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 10 A maximum collector current in a TO-247-3 through-hole package. The device delivers 125 W maximum power dissipation and operates across a temperature range of -65°C to 150°C.

The TIP142 is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

TIP142

onsemiIn Stock: 16456TIP142 Datasheet

Current PartRFQ

TIP142G

onsemiIn Stock: 1029TIP142G Datasheet

DirectRFQ

TIP142T

STMicroelectronicsIn Stock: 21597TIP142T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TIP142 are identified based on electrical and mechanical parameter equivalence. The primary substitution criteria are:

Electrical Parameters (Must Match):

• Transistor Type: NPN - Darlington
• Current - Collector (Ic) (Max): 10 A
• Voltage - Collector Emitter Breakdown (Max): 100 V
• Vce Saturation (Max) @ Ib, Ic: 3 V @ 40 mA, 10 A
• Current - Collector Cutoff (Max): 2 mA
• DC Current Gain (hFE) (Min) @ Ic, Vce: 1000 @ 5 A, 4 V
• Operating Temperature: -65°C to 150°C (TJ)

Mechanical Parameters (Must Match or Be Compatible):

• Mounting Type: Through Hole
• Package / Case: TO-247-3 or equivalent footprint

Substitute parts are categorized as follows:

Direct Substitutes (Identical Electrical and Mechanical Parameters):

• TIP142G (onsemi): Identical specifications with active product status and RoHS3 compliance

Similar Substitutes (Equivalent Electrical Parameters with Package Variation):

• TIP142T (STMicroelectronics): Matches all electrical parameters but uses TO-220-3 package with reduced maximum power rating (80 W versus 125 W)

Parameter Comparison

Engineering Selection Recommendations

TIP142G (onsemi) - Recommended Direct Substitute

The TIP142G is the primary substitute for the obsolete TIP142. This part maintains identical electrical specifications and package configuration (TO-247-3). The TIP142G carries active product status, ensuring long-term availability and supply chain support. The device is RoHS3 compliant, meeting current environmental and regulatory requirements. Selection of TIP142G eliminates the need for circuit redesign or thermal management modifications.

TIP142T (STMicroelectronics) - Alternative Substitute with Design Considerations

The TIP142T provides electrical equivalence across all critical parameters (collector current, breakdown voltage, saturation characteristics, and current gain). However, this part uses a TO-220-3 package instead of TO-247-3, requiring PCB layout modifications and potential thermal management adjustments. The maximum power dissipation is reduced to 80 W compared to 125 W for the original TIP142. The TIP142T is suitable for applications where the reduced power rating meets thermal requirements and where PCB footprint changes are acceptable. This part is RoHS3 compliant and maintains active product status.

Product Status and Compliance Considerations

The original TIP142 is obsolete and non-compliant with RoHS3 standards. Both substitute parts (TIP142G and TIP142T) are active products with RoHS3 compliance, supporting regulatory requirements for new designs and manufacturing operations.

Frequently Asked Questions (FAQ)

Q: Can TIP142G be used as a direct replacement for TIP142?

A: Yes. The TIP142G is electrically and mechanically identical to the TIP142, with the same TO-247-3 package, 10 A collector current rating, 100 V breakdown voltage, and 125 W power dissipation. No circuit modifications are required.

Q: What are the key differences between TIP142G and TIP142T?

A: The primary differences are package type and maximum power rating. TIP142G uses TO-247-3 with 125 W maximum power, while TIP142T uses TO-220-3 with 80 W maximum power. Both maintain identical electrical characteristics (collector current, breakdown voltage, saturation voltage, and current gain). TIP142T requires PCB layout changes due to different pin configuration and spacing.

Q: Is TIP142T suitable for high-power applications?

A: TIP142T is suitable for applications requiring up to 80 W power dissipation. Applications requiring the full 125 W capability of the original TIP142 should use TIP142G to avoid thermal limitations.

Q: Do the substitute parts require different thermal management?

A: TIP142G uses the same TO-247-3 package as the original TIP142 and requires identical thermal management. TIP142T uses TO-220-3 packaging, which may require different heatsink mounting and thermal interface considerations due to package geometry differences.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both TIP142G and TIP142T are RoHS3 compliant, meeting current environmental and regulatory standards. The original TIP142 is RoHS non-compliant.

Q: What is the operating temperature range for each substitute?

A: TIP142G operates from -65°C to 150°C (TJ), matching the original TIP142. TIP142T operates to 150°C (TJ) maximum, with no specified lower temperature limit in the provided data.

Q: Can TIP142T be used in existing TIP142 circuit designs without modification?

A: TIP142T requires PCB layout modifications due to different package type (TO-220-3 versus TO-247-3). Additionally, the reduced power rating (80 W versus 125 W) must be verified against application thermal requirements. Electrical functionality is equivalent.