41FR30 Equivalent & Substitute Parts

Part Overview

The 41FR30 is a 300 mOhms ±1% 1W axial wirewound resistor manufactured by Ohmite, part of the Ohmicone® 40 series. This component is an active product designed for through-hole applications requiring precision resistance in low-ohm, high-power dissipation scenarios. Substitute parts are necessary when the original part becomes unavailable, when specific compliance requirements must be met, or when packaging preferences differ across manufacturing batches or suppliers.

Substiute Parts

41FR30

OhmiteIn Stock: 86141FR30 Datasheet

Current PartRFQ

41FR30E

OhmiteIn Stock: 99841FR30E Datasheet

DirectRFQ

ALSR01R3000FE12

Vishay DaleIn Stock: 931ALSR01R3000FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 41FR30 is determined by strict equivalence across the following critical parameters:

• Resistance value: 300 mOhms
• Tolerance: ±1%
• Power rating: 1W
• Composition: Wirewound
• Package: Axial through-hole
• Termination count: 2

The substitute parts listed below meet all these core electrical and mechanical requirements. Variations in physical dimensions, operating temperature ranges, RoHS compliance status, and moisture resistance features are secondary considerations that do not affect functional substitutability for the primary electrical specification.

Parameter Comparison

Engineering Selection Recommendations

All three parts—41FR30, 41FR30E, and ALSR01R3000FE12—are active products meeting the core electrical specifications of 300 mOhms ±1% at 1W in axial wirewound configuration.

The 41FR30E is an Ohmite variant with identical electrical characteristics and physical dimensions to the original 41FR30, with the addition of RoHS compliance and defined operating temperature range (-55°C ~ 275°C). This part is suitable for applications requiring regulatory compliance without dimensional constraints.

The ALSR01R3000FE12 from Vishay Dale meets all electrical requirements and offers ROHS3 compliance with moisture-resistant construction. Physical dimensions are slightly smaller (0.110" Dia x 0.406" L versus 0.126" Dia x 0.437" L), which may affect board layout compatibility. Operating temperature range is -65°C ~ 250°C. This part is suitable for applications with space constraints or enhanced environmental protection requirements.

Selection should be based on compliance mandates, available board space, and operating temperature requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can 41FR30E be used as a direct replacement for 41FR30?

A: Yes. Both parts share identical resistance (300 mOhms), tolerance (±1%), power rating (1W), composition (wirewound), and physical dimensions (0.126" Dia x 0.437" L). The primary difference is RoHS compliance status and specified operating temperature range on the 41FR30E.

Q: What are the physical dimension differences between the substitute parts?

A: The 41FR30 and 41FR30E are identical at 0.126" Dia x 0.437" L (3.20mm x 11.10mm). The ALSR01R3000FE12 is smaller at 0.110" Dia x 0.406" L (2.79mm x 10.31mm). Verify board layout clearances before selecting the Vishay Dale part.

Q: Does the ALSR01R3000FE12 have moisture-resistant features?

A: Yes. The ALSR01R3000FE12 is specified as moisture-resistant wirewound. Both substitute parts carry MSL rating of 1 (Unlimited).

Q: Are all three parts suitable for the same operating temperature range?

A: The 41FR30E operates from -55°C ~ 275°C. The ALSR01R3000FE12 operates from -65°C ~ 250°C. The original 41FR30 does not specify an operating temperature range. Verify application requirements before selection.

Q: Which parts meet current RoHS compliance standards?

A: The 41FR30E meets RoHS compliance. The ALSR01R3000FE12 meets ROHS3 compliance. The original 41FR30 is RoHS non-compliant.