TIP49 Equivalent & Substitute Parts

Part Overview

The TIP49 is an NPN bipolar junction transistor manufactured by onsemi, 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 designed for general-purpose switching and amplification applications requiring moderate voltage and current handling capability.

The TIP49 is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and new design requirements where this component is specified or where existing inventory requires replenishment from alternative sources.

Substiute Parts

TIP49

onsemiIn Stock: 901TIP49 Datasheet

Current PartRFQ

TIP50G

onsemiIn Stock: 15297TIP50G Datasheet

SimilarRFQ

TIP50

NTE Electronics, IncIn Stock: 4561TIP50 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TIP49 are selected based on electrical and mechanical compatibility within the following criteria:

Electrical Compatibility Requirements:

• Transistor type must be NPN
• Collector-emitter breakdown voltage must equal or exceed 350 V
• Maximum collector current must equal or exceed 1 A
• Maximum power dissipation must equal or exceed 2 W
• Vce saturation characteristics must be compatible with the specified operating point
• DC current gain (hFE) must meet or exceed the minimum specification
• Transition frequency must equal or exceed 10 MHz

Mechanical Compatibility Requirements:

• Mounting type must be through-hole
• Package must be TO-220-3 or equivalent footprint

Parts meeting these criteria are classified as direct substitutes. Parts exceeding the electrical specifications remain functionally compatible for the TIP49 application, as higher voltage ratings, current ratings, and power dissipation provide design margin without introducing incompatibility.

Parameter Comparison

Engineering Selection Recommendations

TIP50G (onsemi) is the primary substitute for the TIP49. This part maintains active product status, ensuring long-term availability and supply chain stability. The TIP50G exceeds the TIP49 electrical specifications with a 400 V collector-emitter breakdown voltage rating compared to 350 V, providing additional design margin. All other electrical parameters remain equivalent or compatible. The TIP50G carries ROHS3 compliance certification, matching the original part's environmental compliance status. Packaging is TO-220-3 through-hole, maintaining mechanical compatibility.

TIP50 (NTE Electronics, Inc) is an alternative substitute with active product status. This part meets all electrical compatibility requirements and provides significantly higher power dissipation capability (40 W versus 2 W), offering substantial thermal margin for applications requiring higher power handling. However, the TIP50 is classified as RoHS non-compliant, which may restrict its use in applications subject to RoHS regulatory requirements. The TO-220-3 through-hole package maintains mechanical compatibility.

Selection between TIP50G and TIP50 depends on regulatory compliance requirements and thermal design considerations. For applications requiring RoHS compliance, TIP50G is the appropriate choice. For applications where higher power dissipation is beneficial and RoHS compliance is not required, TIP50 provides additional thermal headroom.

Frequently Asked Questions (FAQ)

Q: Can the TIP50G directly replace the TIP49 in existing circuit designs?

A: Yes. The TIP50G meets all electrical and mechanical compatibility criteria for the TIP49. The higher 400 V breakdown voltage rating provides additional design margin without introducing incompatibility. Pin configuration and TO-220-3 package dimensions are identical.

Q: What is the primary difference between TIP50G and TIP50 substitutes?

A: The TIP50G (onsemi) maintains ROHS3 compliance and is manufactured by the original TIP49 supplier. The TIP50 (NTE Electronics) offers significantly higher power dissipation (40 W versus 2 W) but is RoHS non-compliant. Both are electrically compatible with the TIP49.

Q: Why does the TIP50 have a 40 W power rating while the TIP49 and TIP50G are rated at 2 W?

A: Power dissipation rating depends on thermal design and package implementation. The TIP50 achieves higher power rating through enhanced thermal characteristics. For applications operating within the TIP49's 2 W specification, both parts are functionally equivalent.

Q: Are there any frequency or switching speed limitations when substituting the TIP49?

A: No. Both substitute parts maintain the 10 MHz transition frequency specification of the TIP49, ensuring compatibility in switching and amplification applications operating at or below this frequency.

Q: What is the impact of the TIP49's obsolete status?

A: The TIP49 is no longer manufactured. Substitute parts with active product status (TIP50G and TIP50) ensure continued availability for maintenance, repair, and new designs. Active status guarantees ongoing supply chain support and manufacturing consistency.

Q: Can the TIP50 be used in applications requiring RoHS compliance?

A: No. The TIP50 (NTE Electronics) is classified as RoHS non-compliant. For applications subject to RoHS regulatory requirements, the TIP50G is the appropriate substitute.

Q: Are the TO-220-3 packages of all three parts mechanically identical?

A: Yes. The TIP49, TIP50G, and TIP50 all use TO-220-3 through-hole packages with identical pin configurations and footprints, ensuring direct mechanical compatibility in PCB designs and socket applications.