Ohmite 43F1K1 Equivalent & Substitute Parts

Part Overview

The Ohmite 43F1K1 is a 1.1 kOhms ±1% 3W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production and maintains 787 pieces in new original stock. The 43F1K1 is designed for applications requiring precision resistive elements with moderate power dissipation in compact axial form factors. Substitute parts are identified to address inventory availability, packaging preferences, or compliance requirements while maintaining electrical and mechanical equivalence.

Substiute Parts

43F1K1

OhmiteIn Stock: 83143F1K1 Datasheet

Current PartRFQ

43F1K1E

OhmiteIn Stock: 124443F1K1E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43F1K1 is determined by strict equivalence across the following critical parameters:

• Resistance value: 1.1 kOhms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Axial with 2 terminations
• Physical dimensions: 0.220" Dia x 0.594" L (5.60mm x 15.10mm)
• Temperature coefficient: ±20ppm/°C

The 43F1K1E qualifies as a direct substitute based on complete alignment with all electrical and mechanical parameters. Packaging format differences (tape and reel versus bulk) do not affect functional equivalence and represent a procurement variation only.

Parameter Comparison

Engineering Selection Recommendations

Both the 43F1K1 and 43F1K1E are functionally equivalent for applications requiring 1.1 kOhms ±1% 3W axial wirewound resistors. Selection between these parts should be based on the following factors:

The 43F1K1E is RoHS compliant and specifies an operating temperature range of -55°C to 275°C, making it suitable for applications subject to RoHS directives or requiring documented thermal performance limits. The 43F1K1 is RoHS non-compliant and does not specify an operating temperature range.

The 43F1K1E is available in bulk packaging, while the 43F1K1 packaging format is not specified. Packaging selection depends on assembly process requirements and inventory management practices.

Both parts carry identical electrical specifications and physical dimensions, ensuring direct interchangeability in circuit designs without modification to PCB layouts or assembly procedures.

Frequently Asked Questions (FAQ)

Q: Can the 43F1K1E replace the 43F1K1 in existing designs?

A: Yes. The 43F1K1E is electrically and mechanically equivalent to the 43F1K1. Both components share identical resistance value, tolerance, power rating, composition, package type, and physical dimensions. Direct substitution is possible without circuit redesign.

Q: What is the difference between the 43F1K1 and 43F1K1E?

A: The primary differences are packaging format (bulk for 43F1K1E), RoHS compliance status (43F1K1E is compliant; 43F1K1 is non-compliant), and documented operating temperature range (43F1K1E specifies -55°C to 275°C; 43F1K1 does not specify). Electrical and mechanical specifications are identical.

Q: Are there any PCB layout or assembly considerations when substituting these parts?

A: No. Both parts are axial wirewound resistors with identical physical dimensions (0.220" Dia x 0.594" L). PCB footprints, lead spacing, and assembly procedures remain unchanged.

Q: Which part should be selected for RoHS-compliant applications?

A: The 43F1K1E is RoHS compliant and should be selected for applications or supply chains requiring RoHS certification. The 43F1K1 is RoHS non-compliant.

Q: Does the 43F1K1E have a specified operating temperature range?

A: Yes. The 43F1K1E operates from -55°C to 275°C. The 43F1K1 does not specify an operating temperature range in the provided data.