TIP48 NPN Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The TIP48 is an NPN bipolar junction transistor manufactured by onsemi, rated for 300 V collector-emitter breakdown voltage and 1 A maximum collector current in a TO-220-3 through-hole package. This device is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design and procurement requirements. The TIP48 is suitable for general-purpose switching and amplification applications requiring moderate voltage and current ratings.

Key Parameters

Parameter	Value
Transistor Type	NPN
Current - Collector (Ic) (Max)	1 A
Voltage - Collector Emitter Breakdown (Max)	300 V
Vce Saturation (Max) @ Ib, Ic	1 V @ 200 mA, 1 A
Current - Collector Cutoff (Max)	1 mA
DC Current Gain (hFE) (Min) @ Ic, Vce	30 @ 300 mA, 10 V
Power - Max	2 W
Frequency - Transition	10 MHz
Mounting Type	Through Hole
Package / Case	TO-220-3
Operating Temperature (TJ)	150°C

Substitute Part Grouping Explanation

Substitute parts for the TIP48 are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

Electrical Parameters (Must Match):

Transistor Type: NPN
Current - Collector (Ic) (Max): 1 A
Voltage - Collector Emitter Breakdown (Max): 300 V
Vce Saturation (Max) @ Ib, Ic: 1 V @ 200 mA, 1 A
Current - Collector Cutoff (Max): 1 mA
DC Current Gain (hFE) (Min) @ Ic, Vce: 30 @ 300 mA, 10 V
Power - Max: 2 W
Frequency - Transition: 10 MHz

Mechanical Parameters (Must Match):

Mounting Type: Through Hole
Package / Case: TO-220-3

All identified substitute parts meet these criteria and are therefore electrically and mechanically interchangeable with the TIP48.

Parameter Comparison

Parameter	TIP48 (onsemi)	TIP48G (onsemi)	TIP48TU (Fairchild Semiconductor)
Transistor Type	NPN	NPN	NPN
Current - Collector (Ic) (Max)	1 A	1 A	1 A
Voltage - Collector Emitter Breakdown (Max)	300 V	300 V	300 V
Vce Saturation (Max) @ Ib, Ic	1 V @ 200 mA, 1 A	1 V @ 200 mA, 1 A	1 V @ 200 mA, 1 A
Current - Collector Cutoff (Max)	1 mA	1 mA	1 mA
DC Current Gain (hFE) (Min) @ Ic, Vce	30 @ 300 mA, 10 V	30 @ 300 mA, 10 V	30 @ 300 mA, 10 V
Power - Max	2 W	2 W	2 W
Frequency - Transition	10 MHz	10 MHz	10 MHz
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3
Operating Temperature (TJ)	150°C	-65°C ~ 150°C	150°C
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

TIP48G (onsemi) is the direct manufacturer equivalent and recommended primary substitute. This part is manufactured by the original TIP48 supplier (onsemi), carries Active product status, and maintains full electrical and mechanical compatibility. The TIP48G includes RoHS3 compliance certification, providing regulatory advantage over the obsolete TIP48. The extended operating temperature range (-65°C ~ 150°C) provides additional thermal margin compared to the TIP48 specification of 150°C maximum.

TIP48TU (Fairchild Semiconductor) is a parametric equivalent from an alternative manufacturer. This part maintains identical electrical specifications and TO-220-3 package configuration. The TIP48TU carries Active product status and is suitable for applications where cross-manufacturer sourcing is acceptable. Availability of this part is significantly higher (13,617 units in stock) compared to TIP48G (1,480 units).

Both substitute parts are electrically and mechanically interchangeable with the TIP48 and require no circuit modifications for direct replacement.

Frequently Asked Questions (FAQ)

Q: Can TIP48G be used as a direct replacement for TIP48?

A: Yes. The TIP48G is electrically and mechanically identical to the TIP48. All electrical parameters, including collector current, breakdown voltage, saturation voltage, current gain, power rating, and transition frequency, are identical. Both devices use the TO-220-3 through-hole package. The TIP48G is the recommended substitute due to its Active product status and manufacturer continuity.

Q: What is the difference between TIP48G and TIP48TU?

A: Both parts are electrically equivalent with identical electrical specifications and TO-220-3 packaging. The primary differences are manufacturer (onsemi versus Fairchild Semiconductor) and operating temperature range. TIP48G specifies -65°C ~ 150°C, while TIP48TU specifies 150°C maximum. Both are Active products suitable for direct substitution.

Q: Are there any package differences between these parts?

A: All three parts (TIP48, TIP48G, TIP48TU) use the TO-220-3 through-hole package. No PCB layout or mechanical modifications are required when substituting between these parts.

Q: Why is the TIP48 classified as obsolete?

A: The TIP48 is listed as obsolete by onsemi. Active equivalent parts (TIP48G and TIP48TU) are available for new designs and ongoing production requirements.

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

A: TIP48G is the recommended choice for new designs, as it is the direct manufacturer equivalent from onsemi with Active product status and RoHS3 compliance. TIP48TU is an acceptable alternative if cross-manufacturer sourcing or higher inventory availability is a procurement requirement.

Q: Are all three parts RoHS compliant?

A: TIP48G is RoHS3 compliant. RoHS status information is not provided for TIP48 (obsolete) or TIP48TU in the available data.

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