TIS97 Equivalent & Substitute Parts

Part Overview

The TIS97 is an NPN bipolar junction transistor (BJT) manufactured by onsemi, designed for general-purpose switching and amplification applications. The device features a maximum collector current of 500 mA, collector-emitter breakdown voltage of 40 V, and maximum power dissipation of 625 mW in a Through Hole TO-92-3 package. The TIS97 is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

TIS97

onsemiIn Stock: 1232TIS97 Datasheet

Current PartRFQ

2N4401BU

onsemiIn Stock: 99862N4401BU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete TIS97 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Transistor type must be NPN
• Collector-emitter breakdown voltage (VCEO) must be equal to or greater than 40 V
• Maximum collector current (Ic) must be equal to or greater than 500 mA
• Maximum power dissipation must be equal to or greater than 625 mW
• Operating temperature range must encompass -55°C to 150°C

Mechanical Compatibility Criteria:

• Package type must be TO-92-3 (Through Hole)
• Physical footprint must be identical for direct board-level replacement

The 2N4401BU meets all substitution criteria. This part is manufactured by onsemi, maintains active product status, and provides enhanced electrical performance characteristics while maintaining identical mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 2N4401BU is the direct substitute for the obsolete TIS97. Selection is based on the following engineering factors:

Product Status: The 2N4401BU maintains active product status with onsemi, ensuring long-term availability and supply chain continuity. The TIS97 is obsolete and subject to inventory depletion.

Electrical Performance: The 2N4401BU exceeds the electrical specifications of the TIS97 across all critical parameters. Maximum collector current is increased to 600 mA (versus 500 mA), and transition frequency is specified at 250 MHz, providing enhanced switching performance for high-frequency applications.

Compliance and Certifications: The 2N4401BU is RoHS3 compliant and maintains REACH Unaffected status, meeting current regulatory requirements for electronic components. Both parts carry EAR99 export classification.

Mechanical Compatibility: Both parts utilize identical TO-92-3 Through Hole packaging, enabling direct board-level substitution without layout modifications.

Thermal Performance: Operating temperature range is identical (-55°C to 150°C), ensuring equivalent thermal performance across all operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the 2N4401BU be used as a direct replacement for the TIS97 without circuit modifications?

A: Yes. The 2N4401BU is electrically and mechanically compatible with the TIS97. Both devices share identical package geometry (TO-92-3), voltage ratings (40 V VCEO), and power dissipation (625 mW). The 2N4401BU provides equal or superior performance across all specified parameters.

Q: What is the primary difference between the TIS97 and 2N4401BU?

A: The 2N4401BU is an active product with enhanced specifications. Maximum collector current is increased to 600 mA, and transition frequency is specified at 250 MHz. The TIS97 is obsolete and no longer manufactured.

Q: Are there any package or pinout differences between these devices?

A: No. Both the TIS97 and 2N4401BU use the TO-92-3 package with identical pinout configuration. Physical footprint and lead spacing are identical, permitting direct substitution on existing printed circuit boards.

Q: Does the 2N4401BU meet current regulatory compliance standards?

A: Yes. The 2N4401BU is RoHS3 compliant and maintains REACH Unaffected status, meeting current environmental and regulatory requirements for electronic components in most jurisdictions.

Q: What is the significance of the transition frequency specification for the 2N4401BU?

A: The 250 MHz transition frequency indicates the 2N4401BU is suitable for higher-frequency switching applications compared to the TIS97, which does not specify this parameter. This provides additional design flexibility for frequency-dependent circuit implementations.

Q: Are both parts available from the same manufacturer?

A: Yes. Both the TIS97 and 2N4401BU are manufactured by onsemi. The 2N4401BU is the active equivalent within onsemi's current product portfolio.