TIP29CTU Equivalent & Substitute Parts

Part Overview

The TIP29CTU is an NPN bipolar junction transistor manufactured by onsemi, rated for 100 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 essential for ongoing design support and production continuity. The TIP29CTU serves in general-purpose switching and amplification applications where moderate current handling and voltage ratings are required.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	100	V
Current - Collector (Ic) (Max)	1	A
Power - Max	2	W
Vce Saturation (Max) @ Ib, Ic	700mV @ 125mA, 1A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 1A, 4V	—
Frequency - Transition	3	MHz
Operating Temperature	150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—

Substitute Part Grouping Explanation

Substitution of the TIP29CTU is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: NPN (required match)
Voltage - Collector Emitter Breakdown (Max): 100 V (required match)
Package / Case: TO-220-3 (required match for mechanical compatibility)
Mounting Type: Through Hole (required match)

Secondary Compatibility Parameters:

Current - Collector (Ic) (Max): Equal to or greater than 1 A
Power - Max: Equal to or greater than 2 W
Vce Saturation (Max): Equal to or less than specified values
DC Current Gain (hFE) (Min): Equal to or greater than 15
Frequency - Transition: Equal to or greater than 3 MHz (where specified)

Substitute parts are grouped into three categories based on their relationship to the TIP29CTU:

Parametric Equivalent: TIP29CG matches all electrical specifications and package requirements with identical ratings at the 1 A collector current level.

Direct Equivalent: TIP29C provides identical electrical performance and is sourced from an alternative manufacturer (NTE Electronics, Inc) with active product status.

Similar Substitutes: BD239C, BD239CTU, BD241CG, BD243CG, and TIP31CG exceed the minimum electrical requirements while maintaining TO-220-3 package compatibility. These parts accommodate higher collector currents and power dissipation, making them suitable for applications requiring design margin or future scaling.

Higher-Current Alternative: BD911 provides significantly elevated current and power ratings (15 A, 90 W) for applications requiring substantial current handling capacity beyond the original specification.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) [A]	Vce Breakdown (Max) [V]	Power (Max) [W]	Vce Sat (Max) [mV]	hFE (Min)	Frequency [MHz]	Package	Product Status
TIP29CTU	onsemi	1	100	2	700	15	3	TO-220-3	Obsolete
TIP29CG	onsemi	1	100	2	700	15	3	TO-220-3	Active
TIP29C	NTE Electronics, Inc	1	100	2	700	15	3	TO-220-3	Active
BD239C	STMicroelectronics	2	100	2	700	15	—	TO-220-3	Active
BD239CTU	onsemi	2	100	30	700	15	—	TO-220-3	Last Time Buy
BD241CG	onsemi	3	100	40	1200	25	3	TO-220-3	Active
BD243CG	onsemi	6	100	65	1500	15	3	TO-220-3	Active
TIP31CG	onsemi	3	100	2	1200	10	3	TO-220-3	Active
BD911	NTE Electronics, Inc	15	100	90	3000	40	3	TO-220-3	Active

Engineering Selection Recommendations

Recommended Primary Substitutes:

TIP29CG is the preferred direct replacement for the obsolete TIP29CTU. Both parts are manufactured by onsemi, share identical electrical specifications, and are housed in the TO-220-3 package. TIP29CG carries active product status with RoHS3 compliance and REACH unaffected certification, ensuring long-term availability and regulatory alignment.

TIP29C from NTE Electronics, Inc provides an alternative source for parametrically equivalent performance. This part maintains all electrical ratings of the TIP29CTU and is actively produced. RoHS3 compliance is confirmed; REACH status is vendor-undefined.

Secondary Substitutes for Design Margin Applications:

BD239C (STMicroelectronics) and BD239CTU (onsemi) accommodate 2 A collector current while maintaining 100 V breakdown voltage and TO-220-3 package compatibility. Both are RoHS3 compliant. BD239CTU is designated Last Time Buy, indicating limited future availability. BD239C is actively produced.

BD241CG (onsemi) supports 3 A collector current and 40 W power dissipation with active product status and RoHS3 compliance. This part is suitable for applications requiring increased current handling or thermal margin.

BD243CG (onsemi) extends capability to 6 A collector current and 65 W power dissipation. Active product status and RoHS3 compliance are confirmed.

Higher-Current Alternative:

BD911 (NTE Electronics, Inc) is rated for 15 A collector current and 90 W power dissipation. This part is suitable only for applications requiring substantially elevated current capacity. Note: BD911 is RoHS non-compliant and carries unlimited moisture sensitivity level.

Compliance Considerations:

All recommended primary and secondary substitutes carry RoHS3 compliance except BD911. REACH status is unaffected for all parts except TIP29C (vendor-undefined). Moisture sensitivity level is 1 (Unlimited) for all parts except BD239CTU and BD241CG through BD243CG (Not Applicable).

Frequently Asked Questions (FAQ)

Q: Can TIP29CG be used as a direct drop-in replacement for TIP29CTU?

A: Yes. TIP29CG is a parametric equivalent with identical electrical specifications (1 A Ic, 100 V Vce breakdown, 2 W power, 700 mV saturation voltage, 15 minimum hFE, 3 MHz transition frequency) and TO-220-3 package. Both are through-hole mounted devices with identical pin configuration.

Q: What is the difference between TIP29CG and TIP29C?

A: Both parts are parametrically equivalent to TIP29CTU with identical electrical ratings. The primary difference is manufacturer: TIP29CG is produced by onsemi, while TIP29C is produced by NTE Electronics, Inc. Both are actively produced and RoHS3 compliant.

Q: Can I use BD239C or BD239CTU instead of TIP29CTU?

A: BD239C and BD239CTU are compatible substitutes for applications where 2 A collector current capacity is acceptable. Both maintain 100 V breakdown voltage and TO-220-3 package compatibility. However, BD239CTU is designated Last Time Buy, indicating limited future availability. BD239C is the preferred choice among these two.

Q: What is the advantage of using BD241CG or BD243CG over TIP29CG?

A: BD241CG and BD243CG provide increased current capacity (3 A and 6 A respectively) and power dissipation (40 W and 65 W respectively) compared to TIP29CG (1 A, 2 W). These parts are suitable for applications requiring design margin, thermal headroom, or future current scaling. Both are actively produced with RoHS3 compliance.

Q: Is BD911 a suitable substitute for TIP29CTU?

A: BD911 is electrically compatible (100 V breakdown voltage, TO-220-3 package, NPN type) but rated for significantly higher current (15 A) and power (90 W). BD911 is suitable only for applications requiring substantially elevated current capacity. Note that BD911 is RoHS non-compliant.

Q: What package considerations apply to these substitutes?

A: All substitute parts listed are housed in TO-220-3 through-hole packages with identical mechanical dimensions and pin configurations. Direct mechanical substitution is possible without PCB modification. Thermal performance may vary due to differences in power dissipation ratings; thermal design review is recommended for applications operating near maximum power limits.

Q: Are there any compliance or regulatory differences between these substitutes?

A: All recommended primary and secondary substitutes (TIP29CG, TIP29C, BD239C, BD239CTU, BD241CG, BD243CG, TIP31CG) are RoHS3 compliant with REACH unaffected status, except TIP29C (REACH vendor-undefined). BD911 is RoHS non-compliant. For applications subject to RoHS or REACH requirements, avoid BD911 and verify TIP29C compliance with your regulatory framework.

Q: What is the product status significance for these parts?

A: TIP29CTU is obsolete, necessitating substitution. TIP29CG and TIP29C are actively produced, ensuring long-term availability. BD239CTU is designated Last Time Buy, indicating production will cease; BD239C is the preferred alternative. BD241CG, BD243CG, TIP31CG, and BD911 are all actively produced with confirmed ongoing availability.

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