TIP42B-BP Equivalent & Substitute Parts

Part Overview

The TIP42B-BP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, rated for 80 V collector-emitter breakdown voltage and 6 A maximum collector current in a TO-220AB through-hole package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs. The TIP42B-BP remains functionally available with 1127 units in current stock inventory.

Substiute Parts

TIP42B-BP

Micro Commercial CoIn Stock: 1217TIP42B-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 TIP42B-BP is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Transistor Type: PNP configuration required
• Current - Collector (Ic) (Max): Minimum 6 A
• Voltage - Collector Emitter Breakdown (Max): Minimum 80 V
• Vce Saturation (Max): 1.5V @ 600mA, 6A
• Current - Collector Cutoff (Max): 700µA
• Power - Max: 2 W
• Frequency - Transition: 3MHz

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: TO-220-3 or equivalent TO-220 variant
• RoHS Status: ROHS3 Compliant

Substitute Parts Identified:

Direct Substitute: TIP42C-BP (Micro Commercial Co) — Active product status with enhanced voltage rating (100 V) and identical current, power, and frequency specifications. Maintains TO-220AB packaging and ROHS3 compliance.

Similar Substitute: TIP42G (onsemi) — Last Time Buy status with reduced voltage rating (40 V) and identical current, power, and frequency specifications. Maintains TO-220 packaging and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

TIP42C-BP Selection: The TIP42C-BP is the primary substitute for the obsolete TIP42B-BP. This device maintains identical electrical performance across all critical parameters while offering active product status and higher voltage rating (100 V versus 80 V). The TIP42C-BP is manufactured by the same supplier (Micro Commercial Co), ensuring design continuity and supply chain stability. ROHS3 compliance and TO-220AB packaging provide direct mechanical compatibility. Inventory availability of 4741 units supports production requirements.

TIP42G Selection: The TIP42G from onsemi is a secondary substitute option with Last Time Buy status. This device maintains identical current, power, and frequency specifications but operates at reduced voltage rating (40 V). The TIP42G is suitable for applications where the 80 V breakdown voltage of the TIP42B-BP is not required. Extended operating temperature range (-65°C to 150°C) provides additional thermal flexibility. ROHS3 compliance and TO-220 packaging ensure mechanical compatibility. Inventory availability of 3154 units is available.

Product Status Considerations: The TIP42B-BP obsolete status necessitates transition planning. The TIP42C-BP active status provides long-term supply assurance. The TIP42G Last Time Buy status indicates limited future availability and should be considered only for applications with specific voltage or temperature requirements not met by the TIP42C-BP.

Frequently Asked Questions (FAQ)

Q: Can the TIP42C-BP directly replace the TIP42B-BP in existing designs?

A: The TIP42C-BP maintains identical electrical specifications for collector current (6 A), saturation voltage (1.5V @ 600mA, 6A), cutoff current (700µA), power dissipation (2 W), and transition frequency (3MHz). The higher voltage rating (100 V versus 80 V) provides enhanced margin. TO-220AB packaging and through-hole mounting are identical. Direct substitution is supported for applications operating at or below 80 V.

Q: What is the voltage rating difference between TIP42B-BP and TIP42C-BP?

A: The TIP42B-BP has a maximum collector-emitter breakdown voltage of 80 V, while the TIP42C-BP is rated for 100 V. This 20 V increase in the TIP42C-BP provides additional design margin and is suitable for applications originally designed for the TIP42B-BP.

Q: When should the TIP42G be selected instead of the TIP42C-BP?

A: The TIP42G is selected when the application voltage requirement is 40 V or lower. The TIP42G offers extended operating temperature range (-65°C to 150°C) compared to the TIP42B-BP (150°C maximum). However, the TIP42G Last Time Buy status indicates limited future availability.

Q: Are all three devices ROHS3 compliant?

A: Yes. The TIP42B-BP, TIP42C-BP, and TIP42G are all ROHS3 compliant, meeting environmental and regulatory requirements for lead-free manufacturing.

Q: What is the difference in DC current gain between these devices?

A: The TIP42B-BP specifies DC current gain (hFE) minimum of 30 @ 300mA, 4V. The TIP42C-BP and TIP42G specify DC current gain (hFE) minimum of 15 @ 3A, 4V. These specifications reflect different measurement conditions and do not indicate incompatibility for standard switching applications.

Q: Are the TO-220AB and TO-220 packages mechanically identical?

A: The TO-220AB and TO-220 packages are mechanically compatible for through-hole mounting applications. Both use three leads in the same physical configuration and footprint. The designations reflect minor supplier or manufacturing variations without affecting board-level compatibility.

Q: What inventory considerations apply to these substitutes?

A: The TIP42C-BP has the highest inventory availability (4741 units), followed by TIP42G (3154 units). The TIP42B-BP (1127 units) is available but obsolete. For new designs, the TIP42C-BP is recommended due to active product status and superior inventory position.