Equivalent & Substitute Parts for 41F25RE

Part Overview

The Ohmite 41F25RE is a 1W, 25 Ohms ±1% through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with high power dissipation in a compact axial package. The part is currently active in production with 980 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

41F25RE

OhmiteIn Stock: 107641F25RE Datasheet

Current PartRFQ

RS01A25R00FE70

Vishay DaleIn Stock: 2632RS01A25R00FE70 Datasheet

SimilarRFQ

WHB25RFET

OhmiteIn Stock: 2004WHB25RFET Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 41F25RE are qualified based on the following critical parameters that must match or exceed the main part specifications:

• Resistance value: 25 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 1W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• RoHS compliance: Required for modern applications

The identified substitutes maintain electrical equivalence across all critical parameters while accommodating minor variations in physical dimensions and operating temperature ranges within acceptable engineering limits.

Parameter Comparison

Engineering Selection Recommendations

All three parts meet the core electrical requirements for 25 Ohm, 1W, ±1% wirewound axial resistors. Selection should be based on the following factors:

41F25RE (Ohmite Ohmicone® 40): Primary choice for applications requiring the full operating temperature range of -55°C to 275°C. RoHS compliant. Suitable for high-temperature environments.

RS01A25R00FE70 (Vishay Dale RS Series): Qualified substitute with moisture-resistant construction. Supports operating temperatures from -65°C to 250°C. ROHS3 compliant. Recommended for applications in humid or moisture-prone environments where additional protection is beneficial.

WHB25RFET (Ohmite WH Series): Qualified substitute from the same manufacturer as the primary part. Compact form factor with reduced axial length (7.00mm vs. 11.10mm). ROHS3 compliant. Operating temperature range limited to -55°C to 150°C. Suitable for space-constrained applications within the specified temperature range.

Frequently Asked Questions (FAQ)

Q: Can RS01A25R00FE70 replace 41F25RE in all applications?

A: RS01A25R00FE70 is electrically equivalent for resistance, tolerance, power rating, and temperature coefficient. The operating temperature range differs (-65°C to 250°C vs. -55°C to 275°C). Substitution is valid for applications operating within the -65°C to 250°C window. Physical dimensions are slightly smaller, which may be advantageous in space-constrained designs.

Q: Is WHB25RFET suitable for high-temperature applications?

A: WHB25RFET has a maximum operating temperature of 150°C, which is lower than both the 41F25RE (275°C) and RS01A25R00FE70 (250°C). This part is not suitable for applications requiring operation above 150°C.

Q: What is the significance of the moisture-resistant feature on RS01A25R00FE70?

A: The moisture-resistant construction on RS01A25R00FE70 provides enhanced protection in humid environments. This feature does not affect electrical equivalence but may extend component life in moisture-prone applications.

Q: Are all three parts RoHS compliant?

A: Yes. The 41F25RE is RoHS Compliant. Both RS01A25R00FE70 and WHB25RFET are ROHS3 Compliant, which represents a more recent compliance standard.

Q: Do physical dimension differences affect circuit board layout?

A: Yes. The three parts have different axial lengths: 41F25RE (11.10mm), RS01A25R00FE70 (10.31mm), and WHB25RFET (7.00mm). PCB layout and component spacing must accommodate the selected part's dimensions. WHB25RFET offers the most compact footprint.

Q: Can these parts be used interchangeably in existing designs?

A: Electrical interchangeability is confirmed for all three parts within their respective operating temperature ranges. Physical dimensions and packaging format (Box vs. Cut Tape) differ. Verify PCB layout compatibility and procurement packaging requirements before substitution.