TIP29B-BP Equivalent & Substitute Parts

Part Overview

The TIP29B-BP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features an 80 V collector-emitter breakdown voltage rating and 1 A maximum collector current in a TO-220AB through-hole package. The TIP29B-BP is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility within the specified parameter ranges while offering active product status and continued availability.

Substiute Parts

TIP29B-BP

Micro Commercial CoIn Stock: 1050TIP29B-BP Datasheet

Current PartRFQ

TIP31C-BP

Micro Commercial CoIn Stock: 4433TIP31C-BP Datasheet

DirectRFQ

TIP29BG

onsemiIn Stock: 4477TIP29BG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TIP29B-BP are identified based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:

Electrical Compatibility Requirements:

• Transistor type must be NPN
• Voltage - Collector Emitter Breakdown rating must equal or exceed 80 V
• Current - Collector (Ic) maximum rating must equal or exceed 1 A
• Frequency - Transition must equal or exceed 3 MHz
• DC Current Gain (hFE) must be compatible with the specified operating point
• Vce Saturation characteristics must be within acceptable ranges for the application

Mechanical Compatibility Requirements:

• Package / Case must be TO-220-3
• Mounting Type must be Through Hole
• Supplier Device Package must be compatible with TO-220AB or TO-220 footprints

Compliance Requirements:

• RoHS3 Compliant status required
• REACH Unaffected status required

The identified substitute parts meet these criteria while offering active product status and improved availability compared to the obsolete TIP29B-BP.

Parameter Comparison

Engineering Selection Recommendations

TIP29BG (onsemi) - Primary Substitute

The TIP29BG is the direct electrical equivalent of the TIP29B-BP, maintaining identical ratings for collector-emitter breakdown voltage (80 V), maximum collector current (1 A), transition frequency (3 MHz), and DC current gain characteristics (15 @ 1A, 4V). The TIP29BG is manufactured by onsemi and carries active product status with 4434 units in stock. This part is ROHS3 Compliant and REACH Unaffected. The operating temperature range extends to -65°C, providing broader low-temperature capability than the original part. The TO-220-3 package and through-hole mounting are identical to the TIP29B-BP, ensuring direct mechanical compatibility.

TIP31C-BP (Micro Commercial Co) - Alternative Substitute

The TIP31C-BP offers enhanced electrical ratings with 100 V collector-emitter breakdown voltage and 3 A maximum collector current, providing design margin for applications requiring higher voltage or current headroom. This part maintains the same 3 MHz transition frequency and is manufactured by Micro Commercial Co with active product status and 4421 units in stock. ROHS3 Compliance and REACH Unaffected status are confirmed. The TO-220-3 package ensures mechanical compatibility. Note that the DC current gain specification (10 @ 3A, 4V) differs from the original part, and Vce saturation is higher (1.2V vs. 700mV), which may affect circuit performance in saturation-mode applications.

Both substitute parts satisfy compliance requirements and offer improved availability through active product status.

Frequently Asked Questions (FAQ)

Q: Can the TIP29BG directly replace the TIP29B-BP without circuit modifications?

A: The TIP29BG maintains identical electrical specifications for voltage, current, gain, and frequency characteristics. The TO-220-3 package and through-hole mounting are mechanically identical. Direct substitution is supported for applications operating within the specified parameter ranges.

Q: What are the key differences between TIP29BG and TIP31C-BP substitutes?

A: The TIP29BG is an electrical equivalent with identical voltage (80 V) and current (1 A) ratings. The TIP31C-BP offers higher voltage (100 V) and current (3 A) ratings, providing design margin but with different gain and saturation characteristics. Selection depends on application requirements and design constraints.

Q: Is the TIP31C-BP suitable for applications designed for the TIP29B-BP?

A: The TIP31C-BP can function in TIP29B-BP applications due to higher voltage and current ratings. However, the lower DC current gain (10 vs. 15) and higher Vce saturation (1.2V vs. 700mV) may affect circuit behavior. Circuit analysis is required for saturation-mode switching applications.

Q: Are all substitute parts RoHS3 Compliant?

A: Yes. Both TIP29BG and TIP31C-BP are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the operating temperature range difference between substitutes?

A: The TIP29BG supports -65°C to 150°C, extending the low-temperature capability compared to the TIP29B-BP (-55°C to 150°C). The TIP31C-BP specifies 150°C maximum junction temperature without a minimum temperature specification in the provided data.

Q: Are the packages identical between all parts?

A: All three parts use the TO-220-3 package with through-hole mounting. The TIP29B-BP and TIP31C-BP use TO-220AB supplier packaging, while the TIP29BG uses TO-220 supplier packaging. Both are compatible with standard TO-220-3 footprints.

Q: Which substitute should be selected for new designs?

A: The TIP29BG is recommended for direct replacement applications requiring electrical equivalence. The TIP31C-BP is suitable for designs requiring higher voltage or current margins, provided circuit analysis confirms compatibility with the modified gain and saturation characteristics.