Equivalent & Substitute Parts for TIP49 NPN Bipolar Transistor

Part Overview

The TIP49 is an NPN bipolar junction transistor manufactured by Central Semiconductor Corp, rated for 350 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 equivalent and substitute parts necessary for ongoing design support and production continuity. The TIP49 operates across a temperature range of -65°C to 150°C with a maximum power dissipation of 40 W and transition frequency of 10 MHz, suitable for general-purpose switching and amplification applications in industrial and consumer electronics.

Substiute Parts

TIP49

Central Semiconductor CorpIn Stock: 916TIP49 Datasheet

Current PartRFQ

TIP50

NTE Electronics, IncIn Stock: 4561TIP50 Datasheet

MFR RecommendedRFQ

TIP50G

onsemiIn Stock: 15297TIP50G Datasheet

MFR RecommendedRFQ

TIP49

NTE Electronics, IncIn Stock: 1700TIP49 Datasheet

Parametric EquivalentRFQ

TIP49

NTE Electronics, IncIn Stock: 1700TIP49 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TIP49 is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor type: NPN configuration
• Voltage rating: Collector-emitter breakdown voltage of 350 V or higher
• Current rating: Maximum collector current of 1 A or higher
• Power dissipation: 40 W or higher
• Frequency response: Transition frequency of 10 MHz or higher
• DC current gain: Minimum hFE of 30 at specified test conditions
• Operating temperature range: -65°C to 150°C or wider
• Package: TO-220-3 through-hole configuration

Substitute Categories:

MFR Recommended Substitutes: Parts that exceed the TIP49 electrical specifications while maintaining identical or superior mechanical compatibility. These include the TIP50 and TIP50G, which feature higher voltage ratings (400 V) and equivalent or superior current handling.

Parametric Equivalents: Parts that match the TIP49 specifications across all critical parameters, including alternative sourcing of the TIP49 itself from NTE Electronics, Inc.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Obsolete Part Continuity):

The NTE Electronics TIP49 serves as a parametric equivalent to the original Central Semiconductor TIP49. This part maintains identical electrical specifications across all critical parameters: 350 V breakdown voltage, 1 A collector current, 40 W power dissipation, and 10 MHz transition frequency. Selection of this part ensures functional compatibility without design modification. The part is currently in active production status with 1610 units in stock.

For Upgraded Performance (Higher Voltage Rating):

The TIP50 (NTE Electronics) and TIP50G (onsemi) both provide 400 V collector-emitter breakdown voltage, representing a 50 V margin above the original TIP49 specification. Both maintain 1 A collector current and 10 MHz transition frequency. These parts are suitable for applications where increased voltage headroom is beneficial. The TIP50G from onsemi carries ROHS3 compliance certification, making it appropriate for designs subject to RoHS requirements. The TIP50G has the highest inventory availability at 15216 units.

Compliance Considerations:

The original TIP49 (Central Semiconductor) and NTE Electronics TIP49 are RoHS non-compliant. For applications requiring RoHS compliance, the TIP50G (onsemi) is the only option among the provided substitutes, offering ROHS3 compliance status. However, the TIP50G has a maximum power rating of 2 W, which is significantly lower than the 40 W rating of the original TIP49 and other substitutes. This power limitation must be evaluated against application requirements.

Packaging and Availability:

All substitute parts maintain the TO-220-3 through-hole package configuration, ensuring mechanical compatibility with existing PCB layouts and thermal management solutions. The TIP50G offers the highest inventory availability, followed by the TIP50 and NTE Electronics TIP49.

Frequently Asked Questions (FAQ)

Q: Can the TIP50 directly replace the TIP49 in all applications?

A: The TIP50 meets or exceeds all electrical specifications of the TIP49. The 400 V breakdown voltage of the TIP50 is higher than the 350 V rating of the TIP49, providing additional voltage margin. Current, power, frequency, and gain specifications are equivalent. Direct substitution is electrically valid. However, circuit design should be reviewed to confirm that the higher voltage rating does not introduce unintended behavior in the application.

Q: What is the difference between TIP50 and TIP50G?

A: Both parts share the same part number base (TIP50) and equivalent electrical specifications: 400 V breakdown voltage, 1 A collector current, and 10 MHz transition frequency. The primary differences are manufacturer (NTE Electronics vs. onsemi), RoHS compliance status (non-compliant vs. ROHS3 compliant), and maximum power dissipation (40 W vs. 2 W). The TIP50G's 2 W power rating is substantially lower than the TIP50's 40 W rating. Applications requiring 40 W dissipation must use the TIP50 or NTE Electronics TIP49, not the TIP50G.

Q: Is the NTE Electronics TIP49 identical to the original Central Semiconductor TIP49?

A: The NTE Electronics TIP49 matches the original Central Semiconductor TIP49 across all provided electrical and mechanical parameters: 350 V breakdown voltage, 1 A collector current, 40 W power dissipation, 10 MHz transition frequency, and TO-220-3 package. Both are NPN transistors with identical operating temperature ranges and DC current gain specifications. The NTE part is currently in active production status, whereas the original is obsolete.

Q: Which substitute should I select for a new design?

A: Selection depends on application requirements and compliance mandates. For maximum voltage margin and general-purpose applications, the TIP50 or TIP50G are appropriate. For RoHS-compliant designs, the TIP50G is required, provided the 2 W power dissipation limit is acceptable. For applications requiring 40 W dissipation without RoHS compliance, the TIP50 or NTE Electronics TIP49 are suitable. All parts maintain TO-220-3 package compatibility.

Q: Are there any thermal management differences between these substitutes?

A: All parts are housed in the TO-220-3 through-hole package, which provides identical thermal interface characteristics. Thermal performance depends on PCB layout, heatsinking, and airflow rather than part selection among these equivalents. The power dissipation rating (40 W for TIP49, TIP50, and NTE TIP49; 2 W for TIP50G) determines the maximum allowable junction temperature rise under specified conditions.

Q: Can I use TIP50G in a 40 W application?

A: No. The TIP50G has a maximum power dissipation rating of 2 W, which is insufficient for applications requiring 40 W dissipation. Exceeding the power rating will cause excessive junction temperature rise and device failure. For 40 W applications, use the TIP50 (NTE Electronics) or NTE Electronics TIP49 instead.

Q: What is the significance of the Vce Saturation specification differences?

A: The Vce Saturation (Max) specification indicates the voltage drop across the transistor when fully saturated (conducting). The original TIP49 specifies 1 V @ 200mA, 1A, while the TIP50 specifies 1 V @ 200mA, 2A. This indicates the TIP50 can maintain saturation at higher collector currents. For applications operating at or below 1 A collector current, both specifications are equivalent. The NTE Electronics TIP49 specifies 1 V @ 200mA, 2A, matching the TIP50 in this parameter.