TIP126-BP Equivalent & Substitute Parts

Part Overview

The TIP126-BP is a PNP Darlington bipolar junction transistor manufactured by Micro Commercial Co, rated for 80 V collector-emitter breakdown voltage and 5 A maximum collector current in a TO-220AB through-hole package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain electrical and mechanical compatibility across the specified parameter range.

Substiute Parts

TIP126-BP

Micro Commercial CoIn Stock: 941TIP126-BP Datasheet

Current PartRFQ

TIP126G

onsemiIn Stock: 7978TIP126G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TIP126-BP is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor type: PNP - Darlington configuration
• Maximum collector current: 5 A
• Maximum collector-emitter breakdown voltage: 80 V
• Vce saturation: 4V @ 20mA, 5A
• Maximum collector cutoff current: 500µA
• Minimum DC current gain: 1000 @ 3A, 3V
• Maximum power dissipation: 2 W

Mechanical Equivalence Criteria:

• Mounting type: Through Hole
• Package type: TO-220-3
• Moisture sensitivity level: 1 (Unlimited)

Compliance Equivalence Criteria:

• RoHS3 compliance
• REACH unaffected status

The substitute part TIP126G, manufactured by onsemi, meets all specified electrical and mechanical parameters and maintains equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The TIP126G manufactured by onsemi is a direct electrical and mechanical equivalent to the TIP126-BP. Both components are classified as obsolete and maintain identical electrical specifications across all critical parameters: collector current, breakdown voltage, saturation voltage, cutoff current, current gain, and power rating. Both are packaged in TO-220-3 through-hole configuration and comply with ROHS3 and REACH requirements.

The TIP126G provides an extended operating temperature range (-65°C to 150°C) compared to the TIP126-BP (0°C to 150°C), offering broader thermal operating capability without compromising any specified parameter. Both components carry MSL Level 1 moisture sensitivity classification, indicating unlimited shelf life under standard storage conditions.

Selection between these parts is determined by availability and procurement requirements, as electrical and mechanical performance are equivalent within the specified operating envelope.

Frequently Asked Questions (FAQ)

Q: Can TIP126G be used as a direct replacement for TIP126-BP in existing designs?

A: Yes. The TIP126G meets all electrical specifications, mechanical package requirements, and compliance certifications of the TIP126-BP. Pin configuration, electrical ratings, and thermal characteristics are identical.

Q: What is the significance of the different operating temperature ranges?

A: The TIP126-BP operates from 0°C to 150°C, while the TIP126G operates from -65°C to 150°C. The TIP126G supports extended low-temperature operation. For applications limited to 0°C minimum ambient, both parts perform identically. For applications requiring operation below 0°C, the TIP126G is required.

Q: Are the TO-220AB and TO-220 package designations interchangeable?

A: Both designations refer to the TO-220-3 package configuration with identical pin spacing, lead geometry, and mounting characteristics. The designations reflect supplier nomenclature variations and do not indicate functional differences.

Q: Do both parts require identical PCB layout and thermal management?

A: Yes. Identical maximum power dissipation (2 W), identical package type (TO-220-3), and identical thermal characteristics require equivalent PCB layout, heatsinking, and thermal management approaches.

Q: What compliance certifications apply to both parts?

A: Both TIP126-BP and TIP126G are ROHS3 compliant and REACH unaffected. Both carry MSL Level 1 classification, permitting unlimited shelf life under standard storage conditions without baking requirements.

Q: Are there any electrical parameter differences between the two parts?

A: No. All specified electrical parameters are identical: maximum collector current (5 A), breakdown voltage (80 V), saturation voltage (4V @ 20mA, 5A), cutoff current (500µA), minimum current gain (1000 @ 3A, 3V), and maximum power (2 W).