Equivalent & Substitute Parts for Ohmite 41F1K0

Part Overview

The Ohmite 41F1K0 is a 1 kOhms ±1% 1W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production with 810 units in stock. Finding equivalent and substitute parts may be necessary due to supply chain considerations, packaging preferences, or specific compliance requirements for your application.

Substiute Parts

41F1K0

OhmiteIn Stock: 86141F1K0 Datasheet

Current PartRFQ

41F1K0E

OhmiteIn Stock: 102441F1K0E Datasheet

DirectRFQ

ALSR011K000FE12

Vishay DaleIn Stock: 1248ALSR011K000FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 41F1K0 are qualified based on the following critical parameters:

• Resistance value: 1 kOhms (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)
• Number of terminations: 2 (exact match required)

The identified substitutes maintain these core electrical and mechanical specifications, ensuring functional equivalence in circuit applications. Variations in temperature coefficient, operating temperature range, physical dimensions, and compliance certifications are noted but do not affect basic substitutability for standard applications.

Parameter Comparison

Engineering Selection Recommendations

41F1K0E (Ohmite): This direct Ohmite substitute maintains identical electrical specifications and physical dimensions to the 41F1K0. The primary distinction is RoHS compliance status; the 41F1K0E is RoHS Compliant, whereas the original 41F1K0 is RoHS non-compliant. Selection of 41F1K0E is appropriate for applications requiring RoHS compliance or when bulk packaging is preferred. Operating temperature range extends to -55°C ~ 275°C.

ALSR011K000FE12 (Vishay Dale): This cross-manufacturer substitute from the ALSR series meets all core electrical requirements with identical resistance, tolerance, and power rating. The component features moisture-resistant construction and ROHS3 compliance. Physical dimensions are slightly smaller (0.110" Dia x 0.406" L versus 0.126" Dia x 0.437" L), which may be advantageous for space-constrained layouts. Temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for the Ohmite parts, and operating temperature range is -65°C ~ 250°C. This substitute is suitable for applications where cross-manufacturer sourcing and moisture resistance are beneficial.

Frequently Asked Questions (FAQ)

Q: Can 41F1K0E be used as a direct replacement for 41F1K0?

A: Yes. The 41F1K0E is electrically and mechanically identical to the 41F1K0, with identical resistance (1 kOhms), tolerance (±1%), power rating (1W), and physical dimensions (0.126" Dia x 0.437" L). The primary difference is RoHS compliance status.

Q: What are the physical dimension differences between substitutes?

A: The Ohmite parts (41F1K0 and 41F1K0E) share identical dimensions of 0.126" Dia x 0.437" L (3.20mm x 11.10mm). The Vishay Dale ALSR011K000FE12 is slightly smaller at 0.110" Dia x 0.406" L (2.79mm x 10.31mm). Verify PCB layout clearances if switching between these options.

Q: How do temperature coefficients affect substitution?

A: The 41F1K0 and 41F1K0E both specify ±20ppm/°C, while the ALSR011K000FE12 specifies ±30ppm/°C. For applications with strict temperature stability requirements, the Ohmite parts provide tighter tolerance over temperature. For general applications, the ±30ppm/°C specification remains within acceptable precision limits.

Q: Which substitute should I select for RoHS-compliant designs?

A: Both 41F1K0E (RoHS Compliant) and ALSR011K000FE12 (ROHS3 Compliant) meet RoHS requirements. The 41F1K0E maintains identical specifications to the original part, while ALSR011K000FE12 offers additional moisture resistance and cross-manufacturer sourcing flexibility.

Q: Are all substitutes available in the same packaging?

A: The 41F1K0E is available in bulk packaging. The ALSR011K000FE12 is also available in bulk packaging. Verify specific packaging requirements with your supplier, as packaging options may affect lead times and minimum order quantities.