TIP31C SL PBFREE Equivalent & Substitute Parts

Part Overview

The TIP31C SL PBFREE is an NPN bipolar junction transistor manufactured by Central Semiconductor Corp, designed for general-purpose switching and amplification applications. This device operates at 100 V collector-emitter breakdown voltage with a maximum collector current of 3 A and 40 W power dissipation in a Through Hole TO-220-3 package.

The TIP31C SL PBFREE is classified as Obsolete. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Substiute Parts

TIP31C SL PBFREE

Central Semiconductor CorpIn Stock: 1170TIP31C SL PBFREE Datasheet

Current PartRFQ

TIP31C

Fairchild SemiconductorIn Stock: 69458TIP31C Datasheet

MFR RecommendedRFQ

TIP31C

Fairchild SemiconductorIn Stock: 69458TIP31C Datasheet

MFR RecommendedRFQ

TIP31C-BP

Micro Commercial CoIn Stock: 4433TIP31C-BP Datasheet

MFR RecommendedRFQ

TIP31CG

onsemiIn Stock: 6765TIP31CG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TIP31C SL PBFREE is determined by strict equivalence of the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Transistor Type: NPN
• Maximum Collector Current (Ic): 3 A
• Collector-Emitter Breakdown Voltage: 100 V
• Vce Saturation: 1.2 V @ 375mA, 3A
• Power Dissipation: 40 W minimum
• Frequency - Transition: 3 MHz
• Package / Case: TO-220-3
• Mounting Type: Through Hole

All substitute parts listed maintain these core electrical specifications and physical package compatibility. Variations in secondary parameters such as DC Current Gain (hFE) at different test conditions, Collector Cutoff Current, and Operating Temperature range do not disqualify a part from substitution provided the critical parameters remain within specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TIP31C (Fairchild Semiconductor)

The TIP31C from Fairchild Semiconductor is the manufacturer-recommended substitute. This part maintains full electrical equivalence with the original TIP31C SL PBFREE across all critical parameters: 3 A collector current, 100 V breakdown voltage, 1.2 V saturation voltage, 40 W power rating, and 3 MHz transition frequency. The part is in Active product status with high inventory availability (69,348 pcs), ensuring long-term supply continuity. REACH compliance is confirmed.

Secondary Substitute: TIP31CG (onsemi)

The TIP31CG from onsemi provides full electrical and mechanical compatibility with identical ratings for collector current, breakdown voltage, saturation voltage, and transition frequency. This part is in Active status with confirmed ROHS3 compliance and REACH unaffected status. Operating temperature range matches the original specification (-65 to 150°C). Inventory availability is 6,666 pcs.

Alternative Substitute: TIP31C-BP (Micro Commercial Co)

The TIP31C-BP from Micro Commercial Co maintains electrical equivalence in collector current (3 A), breakdown voltage (100 V), saturation voltage (1.2 V), and transition frequency (3 MHz). This part is in Active status with ROHS3 compliance. However, the maximum power rating is specified as 2 W rather than 40 W. This part is suitable only for applications where power dissipation does not exceed 2 W. Inventory availability is 4,421 pcs.

Selection Criteria:

For applications requiring the full 40 W power dissipation capability, select either TIP31C (Fairchild Semiconductor) or TIP31CG (onsemi). For lower-power applications (≤2 W), TIP31C-BP is acceptable. All three substitutes are in Active product status, ensuring future availability and support.

Frequently Asked Questions (FAQ)

Q: Can the TIP31C (Fairchild) directly replace the TIP31C SL PBFREE?

A: Yes. Both parts are NPN transistors with identical electrical specifications: 3 A maximum collector current, 100 V breakdown voltage, 1.2 V saturation voltage, 40 W power rating, and 3 MHz transition frequency. Both use the TO-220-3 Through Hole package. The Fairchild part is in Active status, providing superior long-term availability compared to the Obsolete original.

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

A: The primary difference is maximum power dissipation. TIP31C is rated for 40 W, while TIP31C-BP is rated for 2 W. All other electrical parameters are equivalent. TIP31C-BP is suitable only for applications where power dissipation remains below 2 W.

Q: Are all substitute parts RoHS compliant?

A: TIP31C (Fairchild) compliance status is not specified in available data. TIP31C-BP and TIP31CG are both ROHS3 compliant. The original TIP31C SL PBFREE is ROHS3 compliant.

Q: Do the substitute parts have the same operating temperature range?

A: TIP31CG and the original TIP31C SL PBFREE both specify -65 to 150°C operating temperature. TIP31C (Fairchild) does not specify operating temperature in available data. TIP31C-BP specifies 150°C maximum.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All substitute parts use the identical TO-220-3 Through Hole package with the same pin configuration and mechanical footprint. No PCB redesign is required.

Q: Which substitute offers the best long-term availability?

A: TIP31C from Fairchild Semiconductor offers the highest inventory (69,348 pcs) and is designated as the manufacturer-recommended substitute, providing the strongest assurance of continued availability.