TIP127 PNP Darlington Transistor Equivalent & Substitute Parts

Part Overview

The TIP127 is an active PNP Darlington bipolar junction transistor manufactured by STMicroelectronics, rated for 100 V collector-emitter breakdown voltage and 5 A maximum collector current in a TO-220-3 through-hole package. This device is designed for applications requiring moderate power dissipation (2 W maximum) with high current gain characteristics typical of Darlington configurations. The TIP127 remains in active product status with substantial inventory availability. Substitute parts are identified when equivalent electrical specifications and mechanical packaging enable direct functional replacement in circuit designs.

Substiute Parts

TIP127

STMicroelectronicsIn Stock: 62337TIP127 Datasheet

Current PartRFQ

TIP127G

onsemiIn Stock: 1984TIP127G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TIP127 is determined by strict equivalence across the following electrical and mechanical parameters:

• Transistor Configuration: PNP Darlington topology
• Maximum Collector Current: 5 A
• Collector-Emitter Breakdown Voltage: 100 V
• Saturation Voltage: 4 V @ 20mA, 5A
• Collector Cutoff Current: 500 µA
• DC Current Gain (hFE): Minimum 1000 @ 3A, 3V
• Power Dissipation: 2 W maximum
• Package Configuration: TO-220-3 through-hole
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The TIP127G from onsemi meets all specified electrical parameters and mechanical packaging requirements, establishing it as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the TIP127 and TIP127G are active product status devices with full regulatory compliance under ROHS3 and REACH standards. Selection between these parts is based on supply chain availability and manufacturer preference rather than electrical or mechanical differentiation.

The TIP127 (STMicroelectronics) carries 62,300 units in current inventory. The TIP127G (onsemi) carries 1,970 units in current inventory. Both devices satisfy identical electrical specifications and mechanical packaging requirements for through-hole TO-220-3 applications requiring PNP Darlington transistor functionality at 5 A, 100 V ratings.

The TIP127G provides an extended operating temperature range specification (−65°C to 150°C) compared to the TIP127 specification to 150°C maximum. This extended range does not restrict substitution in applications operating within the TIP127 temperature envelope.

Frequently Asked Questions (FAQ)

Q: Can TIP127G replace TIP127 in existing circuit designs?

A: Yes. The TIP127G meets all electrical parameters, saturation characteristics, current gain specifications, and mechanical packaging requirements of the TIP127. Direct substitution is supported without circuit modification.

Q: Are there differences in thermal performance between TIP127 and TIP127G?

A: Both devices are rated for 2 W maximum power dissipation in TO-220-3 packages. Thermal performance is equivalent when mounted with identical heatsinking and board layout.

Q: Does the extended temperature range of TIP127G affect compatibility?

A: No. The TIP127G operating range (−65°C to 150°C) encompasses the TIP127 specification. Extended range capability does not impact substitution in applications within standard operating conditions.

Q: Are pinout and mechanical dimensions identical?

A: Yes. Both devices use TO-220-3 through-hole packaging with identical pin configuration and mechanical dimensions, enabling direct board-level substitution.

Q: What regulatory certifications apply to both parts?

A: Both TIP127 and TIP127G are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations.

Q: Can these parts be used interchangeably in high-current applications?

A: Yes. Both devices are rated for 5 A maximum collector current with identical saturation voltage characteristics (4 V @ 20mA, 5A), supporting equivalent performance in high-current switching and amplification circuits.