TIP29B Equivalent & Substitute Parts

Part Overview

The TIP29B is an NPN bipolar junction transistor manufactured by onsemi, rated for 80 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, making identification of equivalent and substitute parts necessary for ongoing design support and procurement continuity. The TIP29B serves applications requiring medium-power NPN switching and amplification in industrial and consumer electronics.

Key Parameters

Parameter	Value
Transistor Type	NPN
Voltage - Collector Emitter Breakdown (Max)	80 V
Current - Collector (Ic) (Max)	1 A
Power - Max	2 W
Frequency - Transition	3 MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 1A, 4V
Vce Saturation (Max) @ Ib, Ic	700mV @ 125mA, 1A
Current - Collector Cutoff (Max)	300µA
Operating Temperature Range	-65°C ~ 150°C (TJ)
Package / Case	TO-220-3
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitute parts for the TIP29B are classified based on electrical parameter compatibility and physical packaging equivalence. The substitution logic is structured as follows:

Direct Equivalent (Identical Electrical Specifications): The TIP29BG maintains all electrical parameters identical to the TIP29B, including 80 V breakdown voltage, 1 A collector current, 2 W power dissipation, and 3 MHz transition frequency. The primary distinction is packaging format (tube versus unspecified) and product status (active versus obsolete). The TIP29BG is RoHS3 compliant, whereas the TIP29B is RoHS non-compliant.

Similar Substitute (Elevated Voltage Rating): The TIP29C, manufactured by NTE Electronics, Inc, provides a higher collector-emitter breakdown voltage of 100 V while maintaining all other electrical parameters at identical levels: 1 A collector current, 2 W power dissipation, 3 MHz transition frequency, and matching DC current gain specifications. This elevated voltage rating permits use in applications with higher supply voltages while maintaining backward compatibility in circuits designed for the TIP29B.

Substitution eligibility is determined by the following criteria:

Transistor type (NPN)
Maximum collector current (1 A)
Power dissipation (2 W)
Transition frequency (3 MHz)
DC current gain (15 @ 1A, 4V minimum)
Package type (TO-220-3)
Mounting configuration (Through Hole)

Parameter Comparison

Parameter	TIP29B (Main)	TIP29BG (Direct Equivalent)	TIP29C (Similar Substitute)
Manufacturer	onsemi	onsemi	NTE Electronics, Inc
Transistor Type	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	80 V	80 V	100 V
Current - Collector (Ic) (Max)	1 A	1 A	1 A
Power - Max	2 W	2 W	2 W
Frequency - Transition	3 MHz	3 MHz	3 MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 1A, 4V	15 @ 1A, 4V	15 @ 1A, 4V
Vce Saturation (Max) @ Ib, Ic	700mV @ 125mA, 1A	700mV @ 125mA, 1A	700mV @ 125mA, 1A
Current - Collector Cutoff (Max)	300µA	300µA	300µA
Operating Temperature Range	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)
Package / Case	TO-220-3	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant

Engineering Selection Recommendations

TIP29BG Selection Criteria: The TIP29BG is the direct electrical equivalent of the TIP29B and is the preferred substitute for new designs and procurement. This part maintains identical electrical specifications while offering active product status and RoHS3 compliance. The TIP29BG is suitable for direct replacement in existing TIP29B circuit designs without modification. Availability is confirmed at 4434 pieces in stock.

TIP29C Selection Criteria: The TIP29C is applicable in applications where the elevated 100 V collector-emitter breakdown voltage provides design margin or where higher supply voltages are present. This part maintains all other electrical parameters at equivalence with the TIP29B and offers active product status with RoHS3 compliance. The TIP29C is suitable for circuits designed for the TIP29B where the higher voltage rating does not create design conflicts. Availability is confirmed at 21470 pieces in stock.

Compliance Considerations: Both substitute parts (TIP29BG and TIP29C) are RoHS3 compliant, whereas the TIP29B is RoHS non-compliant. For applications subject to RoHS regulations, either substitute part is required. Both parts maintain REACH unaffected status and EAR99 export classification consistent with the main part.

Frequently Asked Questions (FAQ)

Q: Can the TIP29BG be used as a direct replacement for the TIP29B? A: Yes. The TIP29BG maintains identical electrical specifications including 80 V breakdown voltage, 1 A collector current, 2 W power dissipation, and 3 MHz transition frequency. The primary differences are product status (active versus obsolete) and RoHS compliance (RoHS3 versus non-compliant). Direct substitution in existing circuits is supported.

Q: What is the difference between the TIP29B and TIP29C? A: The TIP29C has a higher collector-emitter breakdown voltage rating of 100 V compared to the TIP29B at 80 V. All other electrical parameters remain identical. The TIP29C is suitable for applications with higher supply voltages or where additional voltage margin is required.

Q: Is the TIP29C compatible with circuits designed for the TIP29B? A: Yes. The TIP29C maintains all electrical parameters identical to the TIP29B except for the elevated breakdown voltage. The higher voltage rating does not create incompatibility in circuits designed for the TIP29B. The TIP29C is suitable for direct substitution.

Q: Are there packaging differences between these parts? A: All three parts (TIP29B, TIP29BG, and TIP29C) use the TO-220-3 package with through-hole mounting. Physical dimensions and pin configurations are identical, permitting direct board-level substitution without layout modification.

Q: What is the significance of the RoHS compliance difference? A: The TIP29B is RoHS non-compliant, while both TIP29BG and TIP29C are RoHS3 compliant. For applications subject to RoHS regulations or customer requirements, the TIP29BG or TIP29C must be used. RoHS compliance affects material composition and manufacturing processes but does not alter electrical performance.

Q: Which substitute part should be selected for new designs? A: The TIP29BG is the recommended choice for new designs, as it provides direct electrical equivalence to the TIP29B with active product status and RoHS3 compliance. The TIP29C is appropriate where the elevated 100 V breakdown voltage provides design benefit or where higher supply voltages are present.

Q: Are there any thermal or frequency limitations that differ between these parts? A: No. All three parts maintain identical operating temperature range (-65°C to 150°C junction temperature) and transition frequency (3 MHz). Thermal and frequency performance characteristics are equivalent across all parts.

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