TIP145 Equivalent & Substitute Parts

Part Overview

The TIP145 is a PNP Darlington bipolar junction transistor manufactured by STMicroelectronics, rated for 60 V collector-emitter breakdown voltage and 10 A maximum collector current in a TO-218 through-hole package. This component is classified as obsolete, making identification of suitable substitute parts necessary for ongoing design support and procurement continuity. The TIP145 delivers 125 W maximum power dissipation with a minimum DC current gain of 1000 at specified operating conditions.

Substiute Parts

TIP145

STMicroelectronicsIn Stock: 1358TIP145 Datasheet

Current PartRFQ

TIP147

NTE Electronics, IncIn Stock: 15234TIP147 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TIP145 is determined by the following critical electrical and mechanical parameters:

Mandatory Matching Criteria:

• Transistor polarity: PNP configuration
• Package type: TO-218-3 through-hole mounting
• Maximum collector current: 10 A minimum
• Maximum power dissipation: 125 W minimum
• DC current gain (hFE): 1000 minimum at specified bias conditions

Allowable Parameter Variations:

• Collector-emitter breakdown voltage may exceed 60 V (higher voltage rating provides design margin)
• Operating temperature range may extend beyond the TIP145 specification
• Product status may differ (active vs. obsolete)

The TIP147 qualifies as a substitute based on these criteria, offering enhanced voltage rating while maintaining electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

TIP147 as Primary Substitute:

The TIP147 manufactured by NTE Electronics is a direct functional substitute for the TIP145. Both devices share identical collector current, power dissipation, DC current gain, and TO-218-3 package specifications. The TIP147 provides a 100 V collector-emitter breakdown voltage rating compared to the TIP145's 60 V rating, offering additional design margin in applications where voltage stress is a consideration.

The TIP145 is classified as obsolete, whereas the TIP147 maintains active product status with significantly higher inventory availability (15,206 units in stock versus 1,332 units for the TIP145). This availability differential supports long-term procurement reliability.

Compliance Considerations:

The TIP145 is RoHS3 compliant and REACH unaffected. The TIP147 is RoHS non-compliant. Applications subject to RoHS regulatory requirements must account for this compliance difference during component selection.

Both devices carry identical ECCN (EAR99) and HTSUS (8541.29.0095) classifications, indicating equivalent export control and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can the TIP147 directly replace the TIP145 in existing circuit designs?

A: Yes. The TIP147 maintains electrical performance specifications (collector current, power dissipation, DC current gain) and mechanical compatibility (TO-218-3 package, through-hole mounting) required for direct substitution. The higher voltage rating (100 V vs. 60 V) does not create incompatibility in applications designed for the TIP145.

Q: What is the significance of the voltage rating difference between TIP145 (60 V) and TIP147 (100 V)?

A: The TIP147's higher collector-emitter breakdown voltage provides additional safety margin against voltage transients and overstress conditions. In applications operating below 60 V, this difference has no functional impact. In applications approaching the 60 V limit, the TIP147 offers improved reliability.

Q: Are there package or pinout differences between these devices?

A: No. Both the TIP145 and TIP147 use the TO-218-3 package with identical through-hole mounting configuration and pin assignments. Physical board layout and thermal management considerations remain unchanged.

Q: Why does the TIP147 show RoHS non-compliance while the TIP145 is RoHS3 compliant?

A: RoHS compliance status reflects the manufacturing process and material composition at the time of production. The TIP147 from NTE Electronics does not meet RoHS3 requirements. Applications subject to RoHS regulatory mandates must confirm compliance requirements before selecting the TIP147 as a substitute.

Q: What inventory considerations apply to these substitutes?

A: The TIP145 is obsolete with limited remaining inventory (1,332 units). The TIP147 is an active product with substantially higher availability (15,206 units). For new designs or long-term production requirements, the TIP147 provides superior procurement continuity.

Q: Are the DC current gain specifications identical between these devices?

A: Yes. Both devices specify a minimum DC current gain (hFE) of 1000 at 5 A collector current and 4 V collector-emitter voltage. This parameter is critical for base drive calculations and remains unchanged in substitution.