RL3264R-3R90-F Equivalent & Substitute Parts

Part Overview

The RL3264R-3R90-F is a 3.9 Ohms ±1% 1W chip resistor manufactured by Susumu in the 2512 (6432 Metric) package. This thin film 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 equivalent substitute components for ongoing production and maintenance requirements. Active alternatives with compatible electrical and mechanical characteristics are available to ensure design continuity.

Substiute Parts

RL3264R-3R90-F

SusumuIn Stock: 1048RL3264R-3R90-F Datasheet

Current PartRFQ

CPA2512Q3R90FS-T10

SusumuIn Stock: 938CPA2512Q3R90FS-T10 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RL3264R-3R90-F is based on the following critical parameters that must remain constant or compatible:

Mandatory Matching Parameters:

• Resistance value: 3.9 Ohms
• Tolerance: ±1%
• Package / Case: 2512 (6432 Metric)
• Composition: Thin Film
• Number of Terminations: 2
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Power Rating: May exceed the original 1W specification
• Temperature Coefficient: May differ within acceptable engineering limits
• Operating Temperature Range: May extend beyond the original range
• Product Status: Active alternatives acceptable for obsolete parts
• Packaging Format: Tape & Reel acceptable as substitute for standard packaging

The CPA2512Q3R90FS-T10 meets all mandatory matching criteria while providing enhanced performance characteristics through higher power rating and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The CPA2512Q3R90FS-T10 serves as a direct substitute for the obsolete RL3264R-3R90-F based on the following engineering criteria:

Electrical Compatibility: Both components maintain identical resistance (3.9 Ohms) and tolerance (±1%) specifications, ensuring equivalent circuit performance in current sense applications. The substitute's 16W power rating exceeds the original 1W specification, providing enhanced thermal margin and reliability in the same physical package.

Mechanical Compatibility: The 2512 (6432 Metric) package footprint is identical between both parts. Dimensional variations (length 6.40mm vs. 6.30mm, height 0.65mm vs. 0.80mm) are within standard PCB assembly tolerances and do not require design modifications.

Regulatory Compliance: Both components maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing and environmental standards.

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

Temperature Performance: The substitute's extended operating range (-55°C ~ 155°C) and improved temperature coefficient (±50ppm/°C) provide superior performance stability across wider environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can the CPA2512Q3R90FS-T10 be used as a direct replacement for the RL3264R-3R90-F without PCB modifications?

A: Yes. Both components share identical 2512 (6432 Metric) package specifications and footprints. Dimensional variations are within standard assembly tolerances and do not require design changes.

Q: What is the significance of the higher 16W power rating on the substitute part?

A: The substitute's 16W rating provides increased thermal capacity compared to the original 1W specification. This allows the component to dissipate higher power levels without exceeding temperature limits, improving reliability margin in current sense applications.

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

A: No. Both components maintain identical ROHS3 compliance status and MSL 1 (Unlimited) moisture sensitivity ratings. No additional qualification or testing is required from a regulatory standpoint.

Q: How do the temperature coefficients compare between these parts?

A: The main part specifies 0 / +100ppm/°C while the substitute specifies ±50ppm/°C. The substitute's symmetric and lower coefficient indicates superior temperature stability across the operating range.

Q: What is the difference between the packaging formats listed?

A: The main part uses standard packaging while the substitute is supplied in Tape & Reel (TR) format. Both formats contain identical components; the difference is in the delivery and handling method for automated assembly processes.

Q: Are the physical dimensions identical between these parts?

A: Dimensions are equivalent within manufacturing tolerances. Length varies by 0.10mm (6.40mm vs. 6.30mm) and height by 0.15mm (0.65mm vs. 0.80mm). These variations are standard for the 2512 package and do not affect PCB assembly or functionality.

Q: Can the substitute part handle the same current levels as the original?

A: Yes. Both components maintain the same 3.9 Ohm resistance value. The substitute's higher power rating indicates enhanced thermal performance, allowing equivalent or superior current handling capability.