TIP47 NPN Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The TIP47 is an NPN bipolar junction transistor manufactured by STMicroelectronics, rated for 250 V collector-emitter breakdown voltage and 1 A maximum collector current. This device is packaged in a TO-220-3 through-hole configuration and is designed for general-purpose switching and amplification applications requiring moderate power dissipation up to 2 W. The TIP47 maintains Active product status with 26,200 units in current inventory stock.

Substitute parts become necessary when the primary device reaches end-of-life status, inventory depletion, or when design requirements permit operation within alternative electrical specifications. The substitute parts listed below provide functional equivalence or parametric compatibility based on shared electrical characteristics and mechanical packaging standards.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	250	V
Current - Collector (Ic) (Max)	1	A
Power - Max	2	W
Frequency - Transition	10	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	30 @ 300mA, 10V	—
Vce Saturation (Max) @ Ib, Ic	1V @ 200mA, 1A	—
Operating Temperature (Max)	150	°C
Package / Case	TO-220-3	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitute parts for the TIP47 are classified into two categories based on substitution criteria:

Parametric Equivalent: Parts that maintain identical or near-identical electrical specifications across all critical parameters, enabling direct replacement without circuit modification.

Similar Substitute: Parts that share the same transistor type (NPN), package format (TO-220-3), and mounting method (through-hole) but operate within different voltage or current ratings. These parts require design verification to confirm compatibility within the target application's electrical constraints.

The following parameters determine substitution validity:

Transistor Type (NPN)
Package / Case (TO-220-3)
Mounting Type (Through Hole)
Voltage - Collector Emitter Breakdown (Max) ≥ 250 V or application-specific requirement
Current - Collector (Ic) (Max) ≥ 1 A or application-specific requirement
Power - Max ≥ 2 W or application-specific requirement
Operating Temperature compatibility

Parameter Comparison

Parameter	TIP47 (Main)	TIP47G	TIP48G	KSC2073H2TU	KSC2073TU
Manufacturer	STMicroelectronics	onsemi	onsemi	onsemi	Fairchild Semiconductor
Transistor Type	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	250 V	250 V	300 V	150 V	150 V
Current - Collector (Ic) (Max)	1 A	1 A	1 A	1.5 A	1.5 A
Power - Max	2 W	2 W	2 W	25 W	25 W
Frequency - Transition	10 MHz	10 MHz	10 MHz	4 MHz	4 MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	30 @ 300mA, 10V	30 @ 300mA, 10V	30 @ 300mA, 10V	60 @ 500mA, 10V	40 @ 500mA, 10V
Vce Saturation (Max) @ Ib, Ic	1V @ 200mA, 1A	1V @ 200mA, 1A	1V @ 200mA, 1A	1V @ 50mA, 500mA	1V @ 50mA, 500mA
Current - Collector Cutoff (Max)	1 mA	1 mA	1 mA	10 µA	10 µA
Operating Temperature (Max)	150°C	150°C	150°C	150°C	150°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Active	Active	Active	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified

Engineering Selection Recommendations

TIP47G (onsemi): This part is a parametric equivalent to the TIP47, maintaining identical electrical specifications across voltage rating (250 V), current rating (1 A), power dissipation (2 W), and transition frequency (10 MHz). The TIP47G is manufactured by onsemi and carries Active product status with 2,056 units in inventory. This part is ROHS3 compliant and suitable for direct substitution in applications where the TIP47 is specified. The TIP47G is the preferred equivalent when the original STMicroelectronics TIP47 becomes unavailable.

TIP48G (onsemi): This part provides a higher voltage rating (300 V) compared to the TIP47 (250 V) while maintaining the same current (1 A), power (2 W), and frequency (10 MHz) specifications. The TIP48G is suitable for applications where higher voltage headroom is beneficial or required. This part is Active with 1,480 units in inventory and is ROHS3 compliant. Selection of TIP48G requires confirmation that the application circuit can accommodate the higher voltage rating without adverse effects.

KSC2073TU (Fairchild Semiconductor): This part offers higher current capacity (1.5 A) and significantly higher power dissipation (25 W) compared to the TIP47 (1 A, 2 W). The KSC2073TU operates at a lower voltage rating (150 V) and reduced transition frequency (4 MHz). This part is Active with 91,950 units in inventory. Selection of KSC2073TU is appropriate for applications requiring higher current handling or power dissipation, provided the circuit operates within the 150 V voltage constraint.

KSC2073H2TU (onsemi): This part shares electrical characteristics with the KSC2073TU, providing 1.5 A current capacity and 25 W power dissipation at 150 V rating. The KSC2073H2TU carries Last Time Buy product status with 1,230 units in inventory. This part is ROHS3 compliant but should not be selected for new designs due to its end-of-life status.

Frequently Asked Questions (FAQ)

Q: Can the TIP47G be used as a direct replacement for the TIP47?

A: Yes. The TIP47G is a parametric equivalent with identical electrical specifications: 250 V breakdown voltage, 1 A maximum collector current, 2 W power rating, and 10 MHz transition frequency. Both parts use the TO-220-3 package and through-hole mounting. Direct substitution is valid without circuit modification.

Q: What is the primary difference between the TIP47 and TIP48G?

A: The TIP48G has a higher collector-emitter breakdown voltage rating of 300 V compared to the TIP47's 250 V. All other electrical parameters remain identical. The TIP48G is suitable for applications requiring higher voltage margin or operating at elevated voltages within the 300 V limit.

Q: Can the KSC2073TU replace the TIP47 in all applications?

A: The KSC2073TU cannot replace the TIP47 in all applications. While both are NPN transistors in TO-220-3 packages, the KSC2073TU operates at a maximum of 150 V, which is lower than the TIP47's 250 V rating. Applications requiring operation above 150 V cannot use the KSC2073TU. However, applications operating below 150 V can benefit from the KSC2073TU's higher current capacity (1.5 A) and power dissipation (25 W).

Q: Why is the KSC2073H2TU marked as Last Time Buy?

A: The KSC2073H2TU carries Last Time Buy status, indicating that the manufacturer has discontinued this part and existing inventory represents the final available stock. New designs should not incorporate this part. The KSC2073TU, which shares identical electrical specifications and is Active, is the recommended alternative.

Q: Are all substitute parts RoHS3 compliant?

A: The TIP47, TIP47G, TIP48G, and KSC2073H2TU are all ROHS3 compliant. The KSC2073TU does not specify RoHS status in the provided data. Compliance verification with the KSC2073TU manufacturer is recommended for applications with RoHS requirements.

Q: What is the significance of the transition frequency difference between the TIP47 and KSC2073 series?

A: The TIP47 has a transition frequency of 10 MHz, while the KSC2073 series operates at 4 MHz. Transition frequency indicates the frequency at which the transistor's current gain drops to unity. Applications requiring higher-frequency switching or amplification should retain the TIP47 or TIP47G. Lower-frequency applications can use the KSC2073 series without performance degradation.

Q: Can the TIP48G be used in circuits designed for the TIP47?

A: The TIP48G can be used in circuits designed for the TIP47 provided the circuit design does not depend on the specific 250 V voltage rating. The higher 300 V rating of the TIP48G provides additional voltage margin and is generally compatible. However, circuit verification is necessary to confirm that the higher voltage rating does not introduce unintended behavior in the specific application.

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