TIP127FP Equivalent & Substitute Parts

Part Overview

The TIP127FP is a PNP Darlington bipolar junction transistor manufactured by STMicroelectronics, rated for 100 V collector-emitter breakdown voltage and 5 A maximum collector current in a TO-220-3 Full Pack through-hole package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional compatibility within defined parameter tolerances.

Substiute Parts

TIP127FP

STMicroelectronicsIn Stock: 1797TIP127FP Datasheet

Current PartRFQ

TIP127

NTE Electronics, IncIn Stock: 62369TIP127 Datasheet

DirectRFQ

MJF127G

onsemiIn Stock: 2382MJF127G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TIP127FP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Transistor Type: PNP - Darlington configuration
• Current - Collector (Ic) (Max): 5 A minimum
• Voltage - Collector Emitter Breakdown (Max): 100 V minimum
• Power - Max: 2 W minimum
• Mounting Type: Through Hole
• Package / Case: TO-220-3 or TO-220-3 Full Pack
• RoHS Status: ROHS3 Compliant

Allowable Variations:

• Vce Saturation (Max): May vary within acceptable operating margins
• Current - Collector Cutoff (Max): May vary; lower values indicate superior performance
• DC Current Gain (hFE) (Min): May exceed minimum specification; higher values are acceptable
• Operating Temperature Range: May exceed specified maximum; extended ranges are acceptable
• Supplier Device Package designation: TO-220 or TO-220FP variants acceptable
• Product Status: Active status preferred for new designs; obsolete status acceptable for legacy applications

The TIP127 (NTE Electronics) qualifies as a direct equivalent. The MJF127G (onsemi) qualifies as a functional substitute with enhanced electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

TIP127 (NTE Electronics) is the primary substitute for the obsolete TIP127FP. This part maintains identical electrical specifications across all critical parameters and is classified as active product status, ensuring long-term availability and supply chain continuity. The TIP127 is suitable for direct replacement in all applications where the TIP127FP was originally specified. Both parts carry ROHS3 compliance and equivalent regulatory certifications.

MJF127G (onsemi) is a functional substitute offering enhanced electrical performance characteristics. The MJF127G demonstrates superior saturation voltage (3.5 V versus 4 V), significantly lower collector cutoff current (10 µA versus 500 µA), and doubled DC current gain (2000 versus 1000). These improvements result in reduced power dissipation and improved switching characteristics. The MJF127G is suitable for applications where enhanced performance margins are beneficial. Both parts are active products with ROHS3 compliance and REACH Unaffected status.

Selection between TIP127 and MJF127G depends on application-specific requirements. For direct replacement with identical performance characteristics, select TIP127. For applications benefiting from improved efficiency and switching speed, select MJF127G.

Frequently Asked Questions (FAQ)

Q: Can the TIP127 (NTE Electronics) directly replace the obsolete TIP127FP?

A: Yes. The TIP127 maintains identical electrical specifications for collector current (5 A), collector-emitter breakdown voltage (100 V), power rating (2 W), saturation voltage (4 V @ 20 mA, 5 A), and DC current gain (1000 @ 3 A, 3 V). Both components use TO-220-3 through-hole packaging and are ROHS3 compliant. Direct substitution is supported without circuit modification.

Q: What are the key differences between TIP127 and MJF127G?

A: The MJF127G offers enhanced electrical performance: lower saturation voltage (3.5 V versus 4 V), significantly reduced collector cutoff current (10 µA versus 500 µA), and higher DC current gain (2000 versus 1000). These differences result in lower power dissipation and improved switching characteristics. Both parts meet the same voltage and current ratings and use compatible TO-220-3 packaging.

Q: Are there any package compatibility issues between these substitutes?

A: No. All three parts (TIP127FP, TIP127, and MJF127G) use TO-220-3 through-hole packaging with identical pin configurations. Physical mounting and PCB layout remain unchanged during substitution.

Q: Which substitute should be selected for new designs?

A: For new designs, either TIP127 or MJF127G is acceptable. Both are active products with established supply chains. TIP127 provides direct electrical equivalence to the original TIP127FP. MJF127G provides enhanced performance characteristics suitable for applications requiring improved efficiency or switching speed.

Q: Are both substitutes RoHS compliant?

A: Yes. Both TIP127 (NTE Electronics) and MJF127G (onsemi) are ROHS3 compliant, matching the compliance status of the original TIP127FP.

Q: What is the operating temperature range for each part?

A: TIP127FP and TIP127 are rated to 150 °C (TJ) maximum. MJF127G extends the operating range to −65 °C to 150 °C (TJ), providing wider temperature margin for applications in extreme environments.