CRL2512-FW-R051ELF Equivalent & Substitute Parts

Part Overview

The CRL2512-FW-R051ELF is a 51 milliohm, ±1% tolerance, 1W thick film chip resistor manufactured by Bourns Inc. in the 2512 (6432 Metric) package. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The part maintains ROHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial applications requiring precision current sensing or low-value resistance networks.

Substiute Parts

CRL2512-FW-R051ELF

Bourns Inc.In Stock: 930CRL2512-FW-R051ELF Datasheet

Current PartRFQ

CRM2512-FX-R051ELF

Bourns Inc.In Stock: 918CRM2512-FX-R051ELF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CRL2512-FW-R051ELF is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 51 mOhms
• Tolerance: ±1%
• Package type: 2512 (6432 Metric)
• Composition: Thick Film
• Termination count: 2

Allowable Variation Parameters:

• Power rating: Equal or greater than 1W
• Temperature coefficient: Equal or lower absolute value
• Operating temperature range: Equal or extended upper/lower limits
• Product status: Active preferred over obsolete

The CRM2512-FX-R051ELF qualifies as a direct substitute based on identical resistance, tolerance, package, and composition specifications. The substitute part offers enhanced electrical performance through increased power rating and improved temperature stability.

Parameter Comparison

Engineering Selection Recommendations

The CRM2512-FX-R051ELF is a qualified substitute for the obsolete CRL2512-FW-R051ELF based on the following engineering criteria:

Electrical Compatibility: Both parts maintain identical resistance value (51 mOhms) and tolerance (±1%), ensuring equivalent circuit performance in current sensing and low-value resistance applications.

Package Compatibility: Both components utilize the 2512 (6432 Metric) package with identical footprint dimensions (0.248" L x 0.122" W). The substitute exhibits a maximum seated height of 0.031" compared to 0.028" for the main part, representing a 0.003" (0.10mm) increase that remains within typical PCB assembly tolerances.

Performance Enhancement: The substitute part provides superior electrical characteristics through doubled power rating (2W versus 1W) and improved temperature stability (±100ppm/°C versus ±200ppm/°C). The extended operating temperature range (-55°C to 155°C versus -55°C to 125°C) accommodates broader application requirements.

Compliance Status: Both parts maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and identical ECCN/HTSUS classifications, ensuring regulatory and supply chain continuity.

Product Availability: The substitute part maintains active product status with 864 pieces in stock, providing supply chain security compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can the CRM2512-FX-R051ELF directly replace the CRL2512-FW-R051ELF in existing designs?

A: Yes. Both parts share identical resistance (51 mOhms), tolerance (±1%), package (2512), and composition (thick film). The substitute is electrically and mechanically compatible for direct PCB substitution.

Q: What is the significance of the power rating difference (1W versus 2W)?

A: The substitute part's increased power rating provides additional thermal margin and current handling capacity. In applications where the original 1W rating was adequate, the 2W substitute operates with reduced thermal stress, extending component life and improving reliability.

Q: Does the improved temperature coefficient (±100ppm/°C versus ±200ppm/°C) affect circuit performance?

A: The substitute's lower temperature coefficient indicates superior resistance stability across temperature variations. This enhancement reduces resistance drift in temperature-sensitive applications, improving measurement accuracy and circuit predictability.

Q: Is the 0.003" height difference (0.028" versus 0.031") a concern for PCB assembly?

A: No. The height difference of 0.003" (0.10mm) is negligible for standard PCB assembly processes and remains within typical component placement tolerances. Both parts fit within standard 2512 package specifications.

Q: Are there any compliance or certification differences between the two parts?

A: No. Both parts maintain identical ROHS3 compliance, MSL 1 rating, and REACH unaffected status. Regulatory and environmental certifications are equivalent.

Q: Why is the substitute part listed as active while the main part is obsolete?

A: The CRM2512-FX-R051ELF represents Bourns Inc.'s current production offering for this resistance value and package combination. The obsolete status of the main part reflects discontinuation of that specific product line in favor of the enhanced substitute variant.