Equivalent & Substitute Parts for 40F1K8

Part Overview

The 40F1K8 is a 1.8 kOhms ±1% 10W through-hole resistor with axial wirewound construction, manufactured by Ohmite as part of the Ohmicone® 40 series. This component is classified as Active and is suitable for applications requiring precision resistive elements with moderate power dissipation in through-hole configurations. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across alternative packaging or compliance variants within the same product family.

Substiute Parts

40F1K8

OhmiteIn Stock: 100340F1K8 Datasheet

Current PartRFQ

40F1K8E

OhmiteIn Stock: 127240F1K8E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 40F1K8 is based on maintaining electrical equivalence across the following critical parameters: resistance value (1.8 kOhms), tolerance (±1%), power rating (10W), composition (wirewound), and mechanical form factor (axial package with identical dimensions). The substitute part 40F1K8E is classified as a parametric equivalent within the Ohmicone® 40 series, differing only in packaging configuration (Bulk versus standard) and regulatory compliance status. Both parts share identical electrical specifications and physical dimensions, ensuring direct functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Selection between 40F1K8 and 40F1K8E is determined by regulatory compliance requirements and supply chain considerations. The 40F1K8E offers ROHS3 compliance, making it suitable for applications subject to RoHS directives and modern procurement standards. The 40F1K8 remains available for applications where RoHS compliance is not mandated. Both parts maintain identical electrical performance and mechanical compatibility, ensuring functional equivalence in circuit design. Inventory availability differs between variants, with 40F1K8E currently stocked at higher quantities (1179 Pcs) compared to 40F1K8 (915 Pcs).

Frequently Asked Questions (FAQ)

Q: Can 40F1K8E be used as a direct replacement for 40F1K8? A: Yes. Both parts are electrically and mechanically identical, with matching resistance, tolerance, power rating, temperature coefficient, and axial package dimensions. The primary difference is RoHS compliance status.

Q: What is the significance of the packaging difference between standard and Bulk variants? A: Packaging designation (standard versus Bulk) refers to supply configuration and does not affect component electrical or mechanical specifications. Both variants maintain identical part performance.

Q: Are there any dimensional constraints when substituting between these parts? A: No. Both 40F1K8 and 40F1K8E share identical physical dimensions (0.406" Dia x 1.902" L), ensuring compatibility with existing PCB layouts and mechanical assemblies.

Q: Which part should be selected for new designs? A: Selection depends on regulatory requirements. For applications requiring RoHS compliance, 40F1K8E is the appropriate choice. For applications without RoHS mandates, either part is functionally equivalent.

Q: Are both parts currently in production? A: Yes. Both 40F1K8 and 40F1K8E maintain Active product status with current inventory availability.