RL-1005-7-R500-FNH Equivalent & Substitute Parts

Part Overview

The RL-1005-7-R500-FNH is a 500 mOhms ±1% current sense metal film chip resistor in 0402 (1005 Metric) package format, rated at 0.167W (1/6W) power dissipation. Manufactured by Delta Electronics/Cyntec, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure supply chain availability for applications requiring 500 mOhms resistance with ±1% tolerance and current sensing capability.

Substiute Parts

RL-1005-7-R500-FNH

Delta Electronics/CyntecIn Stock: 1032RL-1005-7-R500-FNH Datasheet

Current PartRFQ

CSR1206FTR500

Stackpole Electronics IncIn Stock: 88092CSR1206FTR500 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RL-1005-7-R500-FNH is determined by the following critical parameters:

• Resistance Value: 500 mOhms exact match required
• Tolerance: ±1% required for precision current sensing applications
• Composition & Features: Current sense capability maintained
• Temperature Coefficient: ±100ppm/°C specification
• Compliance: ROHS3 and REACH compliance maintained

The substitute part CSR1206FTR500 maintains electrical equivalence in resistance, tolerance, temperature coefficient, and current sense functionality. However, it differs in package format (1206 vs. 0402), power rating (0.5W vs. 0.167W), and operating temperature maximum (155°C vs. 125°C). These differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The CSR1206FTR500 serves as an electrical equivalent for the RL-1005-7-R500-FNH based on matching resistance value, tolerance, temperature coefficient, and current sense functionality. Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating.

Selection of CSR1206FTR500 as a substitute requires evaluation of the following design constraints:

• Package Footprint: The 1206 package (3.05mm x 1.55mm) is larger than the 0402 package (1.00mm x 0.50mm), requiring PCB layout modification
• Power Dissipation Capability: The 0.5W rating of CSR1206FTR500 exceeds the 0.167W requirement of the original part, providing additional thermal margin
• Composition Change: Transition from metal film to thick film composition may introduce minor performance variations in high-frequency applications
• Temperature Range Extension: The CSR1206FTR500 supports operation to 155°C, exceeding the original -55°C ~ 125°C range

The active product status of CSR1206FTR500 ensures ongoing supply availability compared to the obsolete RL-1005-7-R500-FNH.

Frequently Asked Questions (FAQ)

Q: Can CSR1206FTR500 be used as a direct replacement for RL-1005-7-R500-FNH?

A: CSR1206FTR500 provides electrical equivalence in resistance, tolerance, and temperature coefficient. However, the larger 1206 package requires PCB layout modification and cannot be used in 0402 footprints without redesign.

Q: What are the key differences between these parts?

A: Primary differences include package size (0402 vs. 1206), power rating (0.167W vs. 0.5W), composition (metal film vs. thick film), and maximum operating temperature (125°C vs. 155°C). Electrical specifications for resistance, tolerance, and temperature coefficient remain identical.

Q: Are both parts RoHS compliant?

A: Yes, both RL-1005-7-R500-FNH and CSR1206FTR500 are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: Why is the original part obsolete?

A: The RL-1005-7-R500-FNH is designated as obsolete by the manufacturer. CSR1206FTR500 maintains active product status, ensuring continued availability and supply chain support.

Q: Does the composition change from metal film to thick film affect performance?

A: Both compositions support the specified ±100ppm/°C temperature coefficient and ±1% tolerance. Application-specific requirements for frequency response or noise characteristics should be evaluated for the intended circuit function.