TIP31B-BP Equivalent & Substitute Parts

Part Overview

The TIP31B-BP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 3 A, collector-emitter breakdown voltage of 80 V, and maximum power dissipation of 2 W in a Through Hole TO-220AB package. The TIP31B-BP is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility within the specified parameter ranges while meeting current manufacturing and compliance standards.

Substiute Parts

TIP31B-BP

Micro Commercial CoIn Stock: 1177TIP31B-BP Datasheet

Current PartRFQ

TIP31C-BP

Micro Commercial CoIn Stock: 4433TIP31C-BP Datasheet

DirectRFQ

TIP31BG

onsemiIn Stock: 2013TIP31BG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TIP31B-BP are classified based on electrical parameter compatibility and manufacturing status. The substitution logic is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Transistor Type: NPN (required match)
• Current - Collector (Ic) (Max): 3 A (required match)
• Voltage - Collector Emitter Breakdown (Max): 80 V or higher (equal or greater acceptable)
• Vce Saturation (Max) @ Ib, Ic: 1.2V @ 375mA, 3A (required match)
• Current - Collector Cutoff (Max): 300µA (required match)
• DC Current Gain (hFE) (Min) @ Ic, Vce: 10 @ 3A, 4V (required match)
• Power - Max: 2 W (required match)
• Frequency - Transition: 3 MHz (required match)
• Operating Temperature (TJ): 150°C maximum (required match or higher)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole (required match)
• Package / Case: TO-220-3 (required match)

Compliance Criteria:

• RoHS Status: ROHS3 Compliant (required match)
• REACH Status: REACH Unaffected (required match)

Substitute parts are grouped into two categories: Direct Manufacturer Substitutes (same manufacturer, active product status) and Parametric Equivalents (alternative manufacturers, identical electrical specifications).

Parameter Comparison

Engineering Selection Recommendations

TIP31C-BP (Direct Manufacturer Substitute): The TIP31C-BP is manufactured by Micro Commercial Co and maintains active product status. This part is electrically compatible with the TIP31B-BP across all critical parameters. The TIP31C-BP features a higher collector-emitter breakdown voltage rating of 100 V compared to the 80 V specification of the TIP31B-BP, providing enhanced voltage margin in applications. Both parts are ROHS3 compliant and REACH unaffected. The TIP31C-BP is supplied in Tube packaging and maintains full inventory availability. This part is suitable for direct replacement in new designs and production applications requiring the TIP31B-BP.

TIP31BG (Parametric Equivalent): The TIP31BG is manufactured by onsemi and is classified as an active product. This part provides parametric equivalence to the TIP31B-BP with identical electrical specifications across all critical parameters including collector current, saturation voltage, current gain, power dissipation, and transition frequency. The TIP31BG features an extended operating temperature range of -65°C to 150°C compared to the 150°C maximum of the TIP31B-BP. Both parts are ROHS3 compliant and REACH unaffected. The TIP31BG is supplied in Tube packaging with adequate inventory availability. This part is suitable for applications requiring parametric equivalence with alternative manufacturer sourcing.

Frequently Asked Questions (FAQ)

Q: Can the TIP31C-BP be used as a direct replacement for the TIP31B-BP?

A: Yes. The TIP31C-BP meets all electrical compatibility requirements specified for the TIP31B-BP. Both parts are NPN transistors with identical maximum collector current (3 A), saturation voltage (1.2V @ 375mA, 3A), current gain (10 @ 3A, 4V), power dissipation (2 W), and transition frequency (3 MHz). The TIP31C-BP features a higher breakdown voltage rating (100 V versus 80 V), which provides additional voltage margin without affecting compatibility. Both parts use the TO-220-3 package and are ROHS3 compliant.

Q: What is the difference between the TIP31B-BP and TIP31C-BP?

A: The primary electrical difference is the collector-emitter breakdown voltage specification. The TIP31B-BP is rated for 80 V maximum, while the TIP31C-BP is rated for 100 V maximum. All other electrical parameters are identical. The TIP31B-BP is classified as obsolete, while the TIP31C-BP maintains active product status with higher inventory availability.

Q: Is the TIP31BG from onsemi compatible with the TIP31B-BP?

A: Yes. The TIP31BG is a parametric equivalent to the TIP31B-BP. Both parts share identical electrical specifications for collector current, saturation voltage, current gain, power dissipation, and transition frequency. The TIP31BG features an extended operating temperature range (-65°C to 150°C) compared to the TIP31B-BP (150°C maximum). Both parts use the TO-220-3 package and are ROHS3 compliant.

Q: Are there package differences between the substitute parts?

A: The TIP31B-BP and TIP31C-BP are both supplied in TO-220AB packages. The TIP31BG is supplied in a TO-220 package. All three parts use the TO-220-3 case style and are mechanically compatible for Through Hole mounting applications. The supplier device package designation difference does not affect functional compatibility or PCB mounting.

Q: What compliance certifications apply to all substitute parts?

A: All three parts (TIP31B-BP, TIP31C-BP, and TIP31BG) are ROHS3 compliant and REACH unaffected. These certifications ensure compliance with environmental and hazardous substance regulations applicable to electronic components.

Q: Which substitute part should be selected for new designs?

A: For new designs, the TIP31C-BP is recommended as the primary choice due to its active product status, higher breakdown voltage rating (100 V), and availability from the original manufacturer (Micro Commercial Co). The TIP31BG is suitable as an alternative if onsemi sourcing is preferred or if the extended operating temperature range (-65°C to 150°C) is required for the application.