TIP147TTU Equivalent & Substitute Parts

Part Overview

The TIP147TTU is a PNP Darlington bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 10 A maximum collector current in a TO-220-3 through-hole package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical specifications and package compatibility, while substitute parts offer comparable performance within defined parameter tolerances suitable for the same application circuits.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP - Darlington	—
Current - Collector (Ic) Max	10	A
Voltage - Collector Emitter Breakdown (Max)	100	V
Vce Saturation (Max) @ Ib, Ic	3 V @ 40 mA, 10 A	—
Current - Collector Cutoff (Max)	2	mA
DC Current Gain (hFE) Min @ Ic, Vce	1000 @ 5 A, 4 V	—
Power - Max	80	W
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TIP147TTU is determined by equivalence in the following critical parameters: transistor type (PNP Darlington), maximum collector current (10 A), collector-emitter breakdown voltage (100 V), DC current gain (hFE minimum 1000 @ 5 A, 4 V), and through-hole mounting configuration. Parts are grouped into three categories based on substitution relationship:

Direct Manufacturer Equivalent (MFR Recommended): TIP147G maintains identical electrical specifications with enhanced power dissipation (125 W vs. 80 W) and active product status, differing only in package format (TO-247-3) and extended operating temperature range.

Direct Manufacturer Equivalent (Alternative Source): TIP147T from STMicroelectronics provides identical electrical performance in the original TO-220-3 package with active product status and higher power rating (90 W).

Similar Performance Substitute: BDX34C and BDW47G offer comparable Darlington performance at 100 V breakdown voltage with trade-offs in collector current capacity, saturation voltage, or current gain specifications.

Parameter Comparison

Parameter	TIP147TTU	TIP147G	TIP147T	BDX34C	BDW47G
Manufacturer	onsemi	onsemi	STMicroelectronics	STMicroelectronics	onsemi
Product Status	Obsolete	Active	Active	Active	Obsolete
Transistor Type	PNP - Darlington	PNP - Darlington	PNP - Darlington	PNP - Darlington	PNP - Darlington
Ic (Max)	10 A	10 A	10 A	10 A	15 A
Vce Breakdown (Max)	100 V	100 V	100 V	100 V	100 V
Vce Saturation (Max)	3 V @ 40 mA, 10 A	3 V @ 40 mA, 10 A	3 V @ 40 mA, 10 A	2.5 V @ 6 mA, 3 A	3 V @ 50 mA, 10 A
Ic Cutoff (Max)	2 mA	2 mA	2 mA	500 µA	2 mA
hFE (Min) @ Ic, Vce	1000 @ 5 A, 4 V	1000 @ 5 A, 4 V	1000 @ 5 A, 4 V	750 @ 3 A, 3 V	1000 @ 5 A, 4 V
Power (Max)	80 W	125 W	90 W	70 W	85 W
Operating Temperature (TJ)	150 °C	−65 to 150 °C	150 °C	150 °C	−55 to 150 °C
Package / Case	TO-220-3	TO-247-3	TO-220-3	TO-220-3	TO-220-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: TIP147T (STMicroelectronics) is the preferred substitute for direct replacement of the obsolete TIP147TTU. This part maintains identical electrical specifications, package format (TO-220-3), and operating temperature range while offering active product status and higher power dissipation (90 W). Procurement continuity and long-term availability are assured through an active manufacturer.

Secondary Recommendation: TIP147G (onsemi) provides equivalent electrical performance with enhanced thermal capability (125 W power rating) and extended operating temperature range (−65 to 150 °C). Package substitution from TO-220-3 to TO-247-3 requires PCB layout modification but offers superior thermal management for high-power applications. Active product status ensures sustained supply.

Alternative Consideration: BDX34C (STMicroelectronics) operates at 100 V with 10 A collector current and active product status. This part exhibits lower saturation voltage (2.5 V @ 6 mA, 3 A) and reduced collector cutoff current (500 µA), making it suitable for applications requiring lower leakage. Power dissipation is limited to 70 W, restricting use to lower-power circuits.

Not Recommended for Direct Substitution: BDW47G, though functionally similar, is classified as obsolete and offers higher collector current (15 A) unsuitable for 10 A rated circuits. This part introduces unnecessary design margin and procurement risk.

Frequently Asked Questions (FAQ)

Q: Can TIP147G replace TIP147TTU in existing PCB designs without modification?

A: TIP147G requires PCB layout modification due to package change from TO-220-3 to TO-247-3. Pin spacing and mounting hole patterns differ between these packages. Thermal management benefits of the larger TO-247-3 package may justify redesign effort for high-power applications.

Q: Is TIP147T a direct pin-compatible replacement for TIP147TTU?

A: Yes. TIP147T maintains TO-220-3 package format with identical pin configuration and electrical specifications. No PCB modification is required for direct substitution.

Q: What are the electrical differences between TIP147TTU and BDX34C?

A: BDX34C exhibits lower saturation voltage (2.5 V vs. 3 V at specified test conditions) and significantly lower collector cutoff current (500 µA vs. 2 mA). DC current gain is reduced to 750 @ 3 A, 3 V compared to 1000 @ 5 A, 4 V. These differences affect switching speed and leakage characteristics; BDX34C is suitable only for applications tolerating these parameter variations.

Q: Why is BDW47G listed as a substitute if it is obsolete?

A: BDW47G is documented as a historical substitute relationship from the original part specification. Obsolete status makes this part unsuitable for new designs. TIP147T or TIP147G are recommended alternatives.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range affects application suitability but does not prevent substitution. TIP147G (−65 to 150 °C) and BDW47G (−55 to 150 °C) offer extended low-temperature operation compared to TIP147TTU and TIP147T (150 °C maximum). Selection depends on circuit operating environment requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TIP147TTU, TIP147G, TIP147T, BDX34C, and BDW47G are all ROHS3 compliant with REACH unaffected status, meeting environmental regulatory requirements for commercial and industrial applications.

Q: What is the significance of the base product number in substitution?

A: Base product numbers (TIP147, BDX34, BDW47) identify device families sharing core electrical characteristics. TIP147G and TIP147T share the TIP147 base number with TIP147TTU, indicating closest electrical equivalence. Parts with different base numbers (BDX34C, BDW47G) represent alternative families with comparable but not identical specifications.

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