41F25R Equivalent & Substitute Parts

Part Overview

The Ohmite 41F25R is a 25 Ohm, 1% tolerance, 1W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with wirewound construction and is currently in active production status. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits selection from qualified alternatives meeting the same electrical and mechanical specifications.

Substiute Parts

41F25R

OhmiteIn Stock: 110541F25R Datasheet

Current PartRFQ

ALSR0125R00FE12

Vishay DaleIn Stock: 896ALSR0125R00FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 41F25R with the Vishay Dale ALSR0125R00FE12 is permissible based on the following critical parameters:

• Resistance Value: Both parts specify 25 Ohms
• Tolerance: Both parts maintain ±1% tolerance
• Power Rating: Both parts are rated for 1W
• Composition: Both utilize wirewound construction
• Package Type: Both are axial through-hole components
• Terminations: Both feature 2 terminations for identical circuit integration

The substitute part meets all core electrical and mechanical requirements for direct replacement in applications where the 41F25R is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the 41F25R and ALSR0125R00FE12 are active production components suitable for direct substitution based on matching electrical specifications. The ALSR0125R00FE12 offers ROHS3 compliance, which may be required for applications subject to RoHS regulations. The 41F25R remains the primary specification; however, the Vishay Dale substitute is electrically and mechanically compatible for applications where component availability or regulatory requirements necessitate an alternative source.

Frequently Asked Questions (FAQ)

Q: Can the ALSR0125R00FE12 replace the 41F25R in all applications?

A: Yes, the ALSR0125R00FE12 meets all core electrical and mechanical requirements: 25 Ohm resistance, ±1% tolerance, 1W power rating, wirewound composition, and axial package configuration. Physical dimensions differ slightly; verify PCB layout clearances if space constraints exist.

Q: What is the difference in temperature coefficient between these parts?

A: The 41F25R specifies ±20ppm/°C while the ALSR0125R00FE12 specifies ±30ppm/°C. For applications requiring the tighter temperature coefficient, the 41F25R is preferred. For general-purpose applications, both coefficients are acceptable.

Q: Are there physical dimension differences I should consider?

A: Yes. The 41F25R measures 0.126" diameter × 0.437" length, while the ALSR0125R00FE12 measures 0.110" diameter × 0.406" length. Verify PCB footprint and board layout accommodate the substitute part's dimensions.

Q: Does RoHS compliance affect substitution eligibility?

A: RoHS compliance is a regulatory requirement, not an electrical specification. The ALSR0125R00FE12 is ROHS3 compliant, while the 41F25R is non-compliant. Select based on your product's regulatory requirements.

Q: Are both parts currently available?

A: Both parts are listed as active production status. Verify current inventory with your supplier, as availability may vary by region and time.