IRLL2705TR N-Channel MOSFET 55V 3.8A Equivalent & Substitute Parts

Part Overview

The IRLL2705TR is an N-Channel MOSFET manufactured by Infineon Technologies, designed for surface mount applications in the SOT-223 package. This device features a 55V drain-to-source voltage rating with a continuous drain current of 3.8A at 25°C, making it suitable for general-purpose switching and amplification circuits.

The IRLL2705TR is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production requirements for legacy systems or redesign initiatives.

Substiute Parts

IRLL2705TR

Infineon TechnologiesIn Stock: 3756IRLL2705TR Datasheet

Current PartRFQ

IRLL2705TRPBF

Infineon TechnologiesIn Stock: 97738IRLL2705TRPBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRLL2705TR is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• FET Type: N-Channel
• Technology: MOSFET (Metal Oxide)
• Drain to Source Voltage (Vdss): 55V
• Continuous Drain Current (Id) @ 25°C: 3.8A
• On-Resistance (Rds On) @ 3.8A, 10V: 40 mOhm
• Gate Threshold Voltage (Vgs(th)) @ 250µA: 2V
• Gate Charge (Qg) @ 10V: 48 nC
• Input Capacitance (Ciss) @ 25V: 870 pF

Mechanical Equivalence Criteria:

• Mounting Type: Surface Mount
• Package: SOT-223 (TO-261-4, TO-261AA)
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The IRLL2705TRPBF meets all electrical and mechanical equivalence criteria and is classified as an active product with improved compliance status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: IRLL2705TRPBF

The IRLL2705TRPBF is the direct equivalent substitute for the IRLL2705TR. Both parts share identical electrical characteristics across all specified parameters, including Vdss, Id, Rds On, Vgs(th), Qg, and Ciss. Both devices utilize the same SOT-223 package with identical pinout and mechanical dimensions, ensuring direct board-level compatibility without layout modifications.

The IRLL2705TRPBF offers significant advantages over the obsolete IRLL2705TR:

Product Status: The IRLL2705TRPBF is classified as an active product with established supply chain availability. The IRLL2705TR is obsolete, making long-term sourcing problematic.

Compliance Status: The IRLL2705TRPBF is ROHS3 compliant, meeting current environmental and regulatory requirements. The IRLL2705TR is RoHS non-compliant, which may restrict use in regulated markets and applications subject to environmental directives.

Packaging: The IRLL2705TRPBF is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both manual and automated assembly processes. Inventory availability is significantly higher (97,700 pcs vs. 3,674 pcs).

For new designs or component refresh initiatives, the IRLL2705TRPBF is the recommended selection. For legacy system maintenance requiring exact part matching, the IRLL2705TRPBF provides full electrical and mechanical compatibility with improved product status and compliance.

Frequently Asked Questions (FAQ)

Q: Can the IRLL2705TRPBF be used as a direct replacement for the IRLL2705TR without circuit modifications?

A: Yes. The IRLL2705TRPBF is electrically and mechanically identical to the IRLL2705TR across all specified parameters. Both devices feature identical Vdss (55V), Id (3.8A), Rds On (40 mOhm), Vgs(th) (2V), Qg (48 nC), and Ciss (870 pF) ratings. The SOT-223 package pinout is identical, enabling direct board-level substitution without circuit redesign or layout changes.

Q: What is the difference between IRLL2705TR and IRLL2705TRPBF?

A: The primary differences are product status and compliance certification. The IRLL2705TR is obsolete and RoHS non-compliant. The IRLL2705TRPBF is an active product with ROHS3 compliance. Electrical and mechanical specifications are identical. The IRLL2705TRPBF is supplied in Cut Tape and Digi-Reel® packaging with higher inventory availability.

Q: Are there any thermal or operating temperature differences between these parts?

A: The IRLL2705TRPBF specifies an operating temperature range of -55°C to 150°C (TJ) and a maximum power dissipation of 1W (Ta). The IRLL2705TR does not provide these specifications in the available data. Both devices share identical electrical performance characteristics at 25°C.

Q: Is the SOT-223 package footprint identical between both parts?

A: Yes. Both the IRLL2705TR and IRLL2705TRPBF use the SOT-223 package, designated as TO-261-4 or TO-261AA. The pinout, lead spacing, and mechanical dimensions are identical, ensuring direct PCB compatibility.

Q: Why is the IRLL2705TR marked as obsolete?

A: The IRLL2705TR has been discontinued by Infineon Technologies. The IRLL2705TRPBF is the active replacement product, offering identical electrical performance with improved compliance status and supply chain availability.

Q: Can I mix IRLL2705TR and IRLL2705TRPBF components in the same production batch?

A: Yes. Both parts are electrically and mechanically equivalent. However, for consistency and traceability, it is recommended to standardize on the IRLL2705TRPBF for new production runs, as it is an active product with established supply continuity.