TIP31A-BP Equivalent & Substitute Parts

Part Overview

The TIP31A-BP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This component features a 60 V collector-emitter breakdown voltage rating and 3 A maximum collector current capability in a TO-220AB through-hole package. The TIP31A-BP is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, and thermal characteristics while accommodating modern component availability.

Substiute Parts

TIP31A-BP

Micro Commercial CoIn Stock: 884TIP31A-BP Datasheet

Current PartRFQ

TIP31C-BP

Micro Commercial CoIn Stock: 4433TIP31C-BP Datasheet

DirectRFQ

TIP31A

Solid State Inc.In Stock: 49340TIP31A Datasheet

DirectRFQ

TIP31AG

onsemiIn Stock: 2042TIP31AG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TIP31A-BP is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor Type: NPN configuration required
• Voltage - Collector Emitter Breakdown (Max): Minimum 60 V
• Current - Collector (Ic) (Max): Minimum 3 A
• Vce Saturation (Max) @ Ib, Ic: 1.2V @ 375mA, 3A
• Current - Collector Cutoff (Max): Maximum 300µA
• DC Current Gain (hFE): Minimum 10 @ 3A, 4V
• Power - Max: Minimum 2 W
• Frequency - Transition: 3 MHz
• Mounting Type: Through Hole
• Package / Case: TO-220-3

Substitute parts are classified into two categories:

1. Direct Manufacturer Substitutes: Parts meeting or exceeding all primary electrical parameters with identical or superior voltage ratings and current capacity.

2. Parametric Equivalents: Parts meeting all primary electrical parameters with identical voltage and current specifications, suitable for direct replacement in equivalent circuit applications.

Parameter Comparison

Engineering Selection Recommendations

TIP31C-BP (Micro Commercial Co): This direct manufacturer substitute is classified as Active and provides enhanced voltage rating of 100 V while maintaining identical current capacity, saturation characteristics, and power dissipation. The TIP31C-BP is suitable for applications requiring higher voltage margin or operating in circuits with transient voltage spikes. ROHS3 compliance and MSL 1 rating confirm environmental and handling compatibility with the original TIP31A-BP.

TIP31A (Solid State Inc.): This direct manufacturer substitute is classified as Active and maintains the 60 V voltage specification of the original part while providing significantly enhanced power dissipation capability of 40 W compared to the 2 W rating of TIP31A-BP. The extended operating temperature range of -65°C to 150°C provides broader thermal operating envelope. This substitute is appropriate for applications requiring higher thermal performance or extended temperature operation. ROHS3 compliance is confirmed.

TIP31AG (onsemi): This parametric equivalent is classified as Active and provides identical electrical specifications to the TIP31A-BP across all critical parameters including 60 V voltage rating, 3 A current capacity, and 2 W power dissipation. The extended operating temperature range of -65°C to 150°C offers improved thermal flexibility. ROHS3 compliance and REACH Unaffected status confirm regulatory alignment. This substitute is appropriate for direct replacement in equivalent circuit applications.

Frequently Asked Questions (FAQ)

Q: Can TIP31C-BP be used as a direct replacement for TIP31A-BP?

A: Yes. The TIP31C-BP meets all electrical requirements of the TIP31A-BP with identical current and saturation characteristics. The higher voltage rating of 100 V provides additional design margin and is backward compatible with 60 V circuit specifications.

Q: What is the primary difference between TIP31A (SSI) and TIP31A-BP?

A: The TIP31A from Solid State Inc. provides 40 W maximum power dissipation compared to 2 W for the TIP31A-BP, while maintaining identical voltage and current ratings. The extended operating temperature range of -65°C to 150°C provides broader thermal capability. Both parts are electrically compatible for switching and amplification functions.

Q: Is TIP31AG suitable for the same applications as TIP31A-BP?

A: Yes. The TIP31AG provides identical electrical specifications across all critical parameters including voltage, current, saturation, and frequency characteristics. The extended operating temperature range of -65°C to 150°C offers improved thermal flexibility for temperature-sensitive applications.

Q: Are all substitute parts available in TO-220-3 through-hole packaging?

A: Yes. All substitute parts listed maintain the TO-220-3 through-hole package configuration, ensuring mechanical and thermal interface compatibility with existing PCB designs and heat sink mounting arrangements.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are ROHS3 compliant. TIP31C-BP and TIP31AG are REACH Unaffected. The TIP31A from Solid State Inc. has Vendor Undefined REACH status. All parts carry EAR99 ECCN classification.

Q: Can TIP31A-BP be used in new production designs?

A: No. The TIP31A-BP is classified as obsolete. New designs must utilize active substitute parts including TIP31C-BP, TIP31A (SSI), or TIP31AG to ensure long-term component availability and supply chain continuity.