TIP42-BP Equivalent & Substitute Parts

Part Overview

The TIP42-BP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, rated for 40 V collector-emitter breakdown voltage and 6 A maximum collector current in a TO-220AB through-hole package. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement continuity. The TIP42-BP serves in applications requiring medium-power PNP switching and amplification functions within the specified voltage and current ratings.

Substiute Parts

TIP42-BP

Micro Commercial CoIn Stock: 740TIP42-BP Datasheet

Current PartRFQ

TIP42C-BP

Micro Commercial CoIn Stock: 4769TIP42C-BP Datasheet

DirectRFQ

TIP42G

onsemiIn Stock: 3248TIP42G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TIP42-BP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

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

Voltage Rating Consideration: The TIP42-BP operates at a maximum collector-emitter breakdown voltage of 40 V. Substitute parts may operate at equal or higher voltage ratings, provided all other electrical and mechanical parameters remain within specification.

Identified Substitutes:

1. TIP42C-BP (Micro Commercial Co): Direct manufacturer equivalent with enhanced voltage rating (100 V) and active product status. Maintains all critical electrical parameters and TO-220AB packaging.

2. TIP42G (onsemi): Equivalent voltage rating (40 V) and electrical specifications with TO-220 packaging. Product status is Last Time Buy.

Parameter Comparison

Engineering Selection Recommendations

TIP42C-BP Selection: The TIP42C-BP is the primary substitute for the obsolete TIP42-BP. This part is manufactured by the same supplier (Micro Commercial Co) and maintains active product status, ensuring long-term availability. The TIP42C-BP exceeds the voltage specification of the original part (100 V versus 40 V), providing additional design margin in applications where voltage headroom is beneficial. All electrical parameters, including saturation voltage, collector cutoff current, and transition frequency, are identical to the TIP42-BP. RoHS3 compliance and MSL rating are maintained. The TO-220AB packaging is mechanically and electrically compatible with the original TO-220-3 specification.

TIP42G Selection: The TIP42G, manufactured by onsemi, provides an equivalent voltage rating (40 V) and matching electrical specifications. This part is classified as Last Time Buy, indicating limited future availability. The TIP42G operates across an extended temperature range (−65°C to 150°C) compared to the TIP42-BP (150°C maximum). RoHS3 compliance is maintained. The TO-220 packaging is compatible with TO-220-3 applications. Selection of the TIP42G is appropriate for applications requiring the original 40 V voltage specification and extended low-temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the TIP42C-BP replace the TIP42-BP in all applications?

A: The TIP42C-BP is electrically and mechanically compatible with the TIP42-BP across all specified parameters. The higher voltage rating (100 V versus 40 V) does not create incompatibility; it provides additional voltage margin. Applications designed for the TIP42-BP operate within the TIP42C-BP specification envelope.

Q: What is the difference between TO-220 and TO-220AB packaging?

A: Both TO-220 and TO-220AB are three-lead through-hole packages with identical pin configuration and mechanical footprint. The designations refer to supplier-specific package variants. Both are compatible with TO-220-3 PCB layouts.

Q: Why does the TIP42G have a different operating temperature range?

A: The TIP42G is manufactured by onsemi and incorporates a different die and process technology than the Micro Commercial Co TIP42-BP. The extended temperature range (−65°C to 150°C) reflects the onsemi device capability. For applications operating only at or below 150°C, this difference is not functionally significant.

Q: Is the TIP42C-BP recommended over the TIP42G?

A: Selection between TIP42C-BP and TIP42G depends on application requirements and supply chain considerations. The TIP42C-BP is active and available from the original manufacturer. The TIP42G is Last Time Buy status. For new designs requiring long-term component availability, the TIP42C-BP is the preferred choice.

Q: Are there any DC current gain (hFE) differences between these parts?

A: The TIP42-BP specifies hFE minimum of 30 @ 300mA, 4V. The TIP42C-BP and TIP42G specify hFE minimum of 15 @ 3A, 4V. These are measured at different collector current levels and reflect different test conditions rather than fundamental device differences. Both specifications are within the TIP42 series design envelope.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. All three parts (TIP42-BP, TIP42C-BP, and TIP42G) share identical TO-220-3 pin configuration and mechanical footprint. No PCB modifications are required for substitution.