TL3AR018F Equivalent & Substitute Parts

Part Overview

The TL3AR018F is an 18 mOhms ±1% 1W chip resistor manufactured by TE Connectivity Passive Product in the 2512 (6432 Metric) package. This metal foil current sense resistor is designed for precision applications requiring low resistance values with tight tolerance specifications. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

TL3AR018F

TE Connectivity Passive ProductIn Stock: 13092TL3AR018F Datasheet

Current PartRFQ

KRL3264-C-R018-F-T1

SusumuIn Stock: 4058KRL3264-C-R018-F-T1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL3AR018F is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Resistance value: 18 mOhms (exact match)
• Tolerance: ±1% (exact match)
• Power rating: 1W (exact match)
• Composition: Metal Foil (exact match)

Mechanical Equivalence Requirements:

• Package / Case: 2512 (6432 Metric) (exact match)
• Number of terminations: 2 (exact match)

Compliance Requirements:

• RoHS3 Compliant status
• Moisture Sensitivity Level 1 (Unlimited)

The substitute part KRL3264-C-R018-F-T1 manufactured by Susumu meets all electrical and mechanical equivalence criteria. This part maintains the same resistance, tolerance, power rating, composition, and package specifications. The substitute is classified as active product status, providing long-term availability for replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The KRL3264-C-R018-F-T1 from Susumu is a direct electrical and mechanical equivalent to the obsolete TL3AR018F. Selection of this substitute is based on the following engineering factors:

Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, ensuring regulatory and environmental compatibility with existing designs.

Product Status: The substitute part is classified as active, providing assured long-term availability and supply chain continuity compared to the obsolete main part.

Performance Enhancement: The substitute demonstrates improved temperature coefficient performance (±50ppm/°C versus ±75ppm/°C) and an extended upper operating temperature limit (175°C versus 170°C), providing enhanced thermal stability in demanding applications.

Automotive Qualification: The substitute carries AEC-Q200 automotive qualification, enabling use in automotive and high-reliability applications where such certification is required.

Mechanical Compatibility: Dimensional variations between the parts (length 6.30mm versus 6.40mm, width 3.10mm versus 3.20mm, height 0.70mm versus 0.60mm) remain within acceptable tolerances for standard PCB footprints designed for the 2512 package, ensuring drop-in compatibility.

Frequently Asked Questions (FAQ)

Q: Can the KRL3264-C-R018-F-T1 be used as a direct replacement for the TL3AR018F?

A: Yes. Both parts share identical electrical specifications (18 mOhms, ±1%, 1W, metal foil composition) and are packaged in the 2512 (6432 Metric) case. Mechanical dimensions are sufficiently similar to permit PCB footprint compatibility. The substitute is mechanically and electrically interchangeable.

Q: What are the key differences between these two parts?

A: The primary differences are product status and performance characteristics. The TL3AR018F is obsolete, while the KRL3264-C-R018-F-T1 is active. The substitute offers a lower temperature coefficient (±50ppm/°C versus ±75ppm/°C), an extended upper operating temperature (175°C versus 170°C), and AEC-Q200 automotive qualification. These represent performance enhancements rather than limitations.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity ratings, and share identical REACH and ECCN classifications. Regulatory and environmental compliance is equivalent.

Q: Will the substitute part fit the existing PCB footprint?

A: Yes. The substitute dimensions (6.30mm L x 3.10mm W x 0.70mm H) are within acceptable mechanical tolerances relative to the main part (6.40mm L x 3.20mm W x 0.60mm H). Standard 2512 package footprints accommodate both parts without modification.

Q: What is the significance of the AEC-Q200 rating on the substitute?

A: AEC-Q200 is an automotive qualification standard. The substitute's AEC-Q200 rating indicates compliance with automotive reliability and quality requirements. This certification is not present on the main part but does not create incompatibility; it represents an additional qualification available on the substitute.

Q: Are there any thermal performance considerations?

A: The substitute exhibits superior thermal performance characteristics. The lower temperature coefficient (±50ppm/°C) provides better resistance stability across temperature variations. The extended upper operating temperature limit (175°C) permits operation in higher-temperature environments compared to the main part (170°C). These characteristics enhance performance in thermally demanding applications.

Q: What packaging formats are available?

A: The main part is supplied in Cut Tape (CT) packaging. The substitute is supplied in Tape & Reel (TR) packaging. Both formats are standard for component procurement and do not affect electrical or mechanical compatibility.