14FPR040E Equivalent & Substitute Parts

Part Overview

The 14FPR040E is a 40 mOhms ±1% 4.5W axial through-hole resistor manufactured by Ohmite, designed for current sense applications with non-inductive metal element construction. This part is classified as Obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 200°C and maintains ROHS3 compliance.

Substiute Parts

14FPR040E

OhmiteIn Stock: 74614FPR040E Datasheet

Current PartRFQ

17FPR040E

OhmiteIn Stock: 114617FPR040E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 14FPR040E is determined by the following critical parameters:

• Resistance value: 40 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Element (exact match required)
• Features: Current Sense, Non-Inductive (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 200°C (exact match required)
• Package Type: Axial (exact match required)

The 17FPR040E meets all substitution criteria. While the power rating increases from 4.5W to 7W, this represents an enhancement in thermal capability and does not compromise compatibility in applications designed for the original 4.5W specification.

Parameter Comparison

Engineering Selection Recommendations

The 17FPR040E is the qualified substitute for the obsolete 14FPR040E. Both parts are manufactured by Ohmite and maintain identical electrical specifications across resistance, tolerance, temperature coefficient, and operating temperature range. The 17FPR040E carries Active product status, ensuring continued availability and supply chain support.

The increase in power rating from 4.5W to 7W provides additional thermal margin without altering electrical performance in the 40 mOhm, ±1% specification. Both parts maintain ROHS3 compliance and are suitable for current sense applications requiring non-inductive metal element construction.

Physical dimensions differ between the two parts. The 17FPR040E is larger (0.375" Dia x 1.500" L versus 0.335" Dia x 1.059" L), requiring verification of available board space and thermal dissipation requirements in the target application.

Frequently Asked Questions (FAQ)

Q: Can the 17FPR040E directly replace the 14FPR040E in existing designs?

A: The 17FPR040E is electrically equivalent across all critical parameters: 40 mOhms resistance, ±1% tolerance, ±50ppm/°C temperature coefficient, and -55°C to 200°C operating range. Physical dimensions differ, requiring confirmation that board layout accommodates the larger package (0.375" Dia x 1.500" L).

Q: What is the significance of the increased power rating in the 17FPR040E?

A: The 17FPR040E is rated for 7W versus the original 4.5W. This higher power rating indicates improved thermal dissipation capability and does not affect electrical performance in applications designed for the original specification.

Q: Are both parts suitable for current sense applications?

A: Both the 14FPR040E and 17FPR040E are specified for current sense applications with non-inductive metal element construction, maintaining identical temperature coefficients and operating ranges.

Q: What compliance certifications apply to the substitute part?

A: The 17FPR040E maintains ROHS3 compliance, matching the original part's regulatory status.

Q: Why is the 14FPR040E listed as Obsolete?

A: The 14FPR040E carries Obsolete product status. The 17FPR040E is the Active equivalent from Ohmite, ensuring continued procurement availability and manufacturer support.