TIP140G Equivalent & Substitute Parts

Part Overview

The TIP140G is an NPN Darlington bipolar junction transistor manufactured by onsemi, housed in a TO-247-3 through-hole package. This device is rated for 60 V collector-emitter breakdown voltage and 10 A maximum collector current, with a maximum power dissipation of 125 W. The TIP140G is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity. Equivalent parts must maintain functional compatibility across critical electrical parameters while accommodating the through-hole mounting requirement.

Substiute Parts

TIP140G

onsemiIn Stock: 2624TIP140G Datasheet

Current PartRFQ

TIP142G

onsemiIn Stock: 1029TIP142G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TIP140G is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Transistor topology: NPN Darlington configuration
• Mounting type: Through-hole technology
• Package designation: TO-247-3
• Maximum collector current: 10 A
• DC current gain (hFE): 1000 minimum at specified bias conditions
• Vce saturation: 3 V maximum at rated conditions
• Collector cutoff current: 2 mA maximum
• Power dissipation capability: 125 W
• Operating temperature range: −65°C to 150°C

Allowable Variation:

• Collector-emitter breakdown voltage may exceed the 60 V specification of the TIP140G, provided the substitute maintains all other electrical characteristics and physical compatibility. Higher voltage ratings do not compromise functionality in applications designed for 60 V operation.

The TIP142G qualifies as a direct substitute based on these criteria, with the distinction that its 100 V breakdown voltage rating provides enhanced voltage margin while maintaining identical current, gain, saturation, and thermal specifications.

Parameter Comparison

Engineering Selection Recommendations

The TIP142G is a qualified substitute for the TIP140G based on electrical parameter equivalence and regulatory compliance alignment. Both devices are ROHS3 compliant and REACH unaffected, ensuring consistency with environmental and hazardous substance restrictions.

The primary distinction between these components is product status: the TIP140G is obsolete, while the TIP142G is active. For applications currently utilizing the TIP140G, transition to the TIP142G is supported by identical electrical performance across all critical specifications—collector current, saturation voltage, current gain, and thermal operating range.

The TIP142G's higher collector-emitter breakdown voltage (100 V versus 60 V) does not introduce incompatibility. In circuits designed for 60 V operation, the higher voltage rating of the TIP142G provides additional safety margin without altering switching behavior, saturation characteristics, or gain performance.

Both devices employ the TO-247-3 through-hole package, ensuring mechanical and thermal interface compatibility without PCB redesign or mounting modification.

Frequently Asked Questions (FAQ)

Q: Can the TIP142G directly replace the TIP140G in existing designs?

A: Yes. The TIP142G maintains identical electrical specifications for collector current (10 A), DC current gain (1000 minimum), saturation voltage (3 V), and operating temperature range (−65°C to 150°C). The TO-247-3 package pinout and mounting footprint are identical. No circuit modification is required.

Q: Why does the TIP142G have a higher breakdown voltage rating?

A: The TIP142G is rated for 100 V collector-emitter breakdown voltage compared to the TIP140G's 60 V rating. This represents a different device variant within the same Darlington family, offering enhanced voltage capability. In 60 V applications, this higher rating provides additional design margin without performance penalty.

Q: Are there any thermal or power dissipation differences?

A: No. Both devices are rated for 125 W maximum power dissipation and operate across the identical temperature range of −65°C to 150°C junction temperature. Thermal performance and heat sinking requirements remain unchanged.

Q: What is the significance of the TIP140G being obsolete?

A: Obsolete status indicates the TIP140G is no longer manufactured or supported by onsemi. The TIP142G, classified as active, is the current production equivalent and is recommended for new designs and ongoing procurement to ensure supply continuity.

Q: Are both devices RoHS compliant?

A: Yes. Both the TIP140G and TIP142G are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Does package type affect substitution?

A: No. Both devices use the TO-247-3 through-hole package. Mechanical compatibility, lead spacing, and mounting interface are identical, eliminating any package-related substitution constraints.