14FPR025E Equivalent & Substitute Parts

Part Overview

The 14FPR025E is a 25 mOhms ±1% 4.5W through-hole axial 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 planning. The part operates across a wide temperature range of -55°C to 200°C and maintains ROHS3 compliance.

Substiute Parts

14FPR025E

OhmiteIn Stock: 92014FPR025E Datasheet

Current PartRFQ

17FPR025E

OhmiteIn Stock: 86617FPR025E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 14FPR025E is based on the following critical parameters that must remain constant or be exceeded:

• Resistance value: 25 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 or wider range acceptable)
• Package Type: Axial (exact match required)

The substitute part 17FPR025E meets all these criteria while providing an increased power rating of 7W compared to the original 4.5W specification. This higher power rating represents a direct upgrade path suitable for applications where the original part is no longer available.

Parameter Comparison

Engineering Selection Recommendations

The 17FPR025E is the direct substitute for the obsolete 14FPR025E. Both parts are manufactured by Ohmite and maintain identical electrical specifications for resistance, tolerance, temperature coefficient, and operating temperature range. The 17FPR025E carries active product status, ensuring long-term availability and supply chain continuity.

The primary difference is the increased power dissipation capability (7W versus 4.5W) and corresponding physical dimensions. The 17FPR025E is larger in both diameter and length, which must be verified for compatibility within the target application's physical constraints. Both parts maintain ROHS3 compliance and are suitable for current sense applications requiring non-inductive metal element construction.

Frequently Asked Questions (FAQ)

Q: Can the 17FPR025E directly replace the 14FPR025E in all applications?

A: Electrical substitution is valid for all applications where the 14FPR025E was specified. However, physical space constraints must be evaluated, as the 17FPR025E has larger dimensions (0.375" Dia x 1.500" L versus 0.335" Dia x 1.059" L). PCB layout and component clearance must be verified before implementation.

Q: What is the significance of the higher power rating on the 17FPR025E?

A: The 7W rating on the 17FPR025E provides greater thermal headroom compared to the 4.5W rating of the 14FPR025E. This allows the substitute part to operate safely at higher current levels or in higher ambient temperature environments while maintaining the same resistance and tolerance specifications.

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

A: Both parts are ROHS3 compliant. The 17FPR025E carries active product status, whereas the 14FPR025E is obsolete. No functional compliance differences exist between the two parts for current sense applications.

Q: What should be verified before implementing the 17FPR025E as a substitute?

A: Verify PCB layout compatibility with the larger physical dimensions, confirm that the increased power rating does not introduce thermal management concerns in the application, and validate that the axial package orientation remains compatible with the circuit design.