Ohmite 43F2K0 Equivalent & Substitute Parts

Part Overview

The Ohmite 43F2K0 is a 2 kOhms ±1% 3W through-hole resistor with axial wirewound construction from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with moderate power dissipation in a compact axial package. The part is currently active in production with 1082 units in stock. Substitute parts are identified when the original manufacturer part becomes unavailable, when inventory constraints require alternative sourcing, or when application requirements permit equivalent electrical and mechanical specifications.

Substiute Parts

43F2K0

OhmiteIn Stock: 111043F2K0 Datasheet

Current PartRFQ

ALSR032K000FE12

Vishay DaleIn Stock: 1065ALSR032K000FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Ohmite 43F2K0 are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Resistance value: 2 kOhms (exact match required)
• Tolerance: ±1% (equivalent or tighter tolerance acceptable)
• Power rating: 3W (equal or greater acceptable)
• Composition: Wirewound (required for thermal and stability characteristics)
• Package: Axial through-hole (mechanical compatibility)
• Termination count: 2 (standard axial configuration)

Secondary Compatibility Parameters:

• Temperature coefficient within acceptable range for application
• Operating temperature range sufficient for intended use
• Compliance certifications matching or exceeding application requirements

The Vishay Dale ALSR032K000FE12 meets all primary substitution criteria with equivalent electrical specifications and compatible axial packaging.

Parameter Comparison

Engineering Selection Recommendations

Ohmite 43F2K0 Selection: Use the original Ohmite 43F2K0 when RoHS non-compliant components are acceptable for the application and when the larger physical dimensions (0.220" Dia x 0.594" L) are compatible with board layout constraints. This part is active in production with adequate inventory availability.

Vishay Dale ALSR032K000FE12 Selection: The ALSR032K000FE12 is suitable as a direct substitute when ROHS3 compliance is required or preferred. This part offers a smaller physical footprint (0.180" Dia x 0.500" L), which may provide layout advantages in space-constrained applications. The specified operating temperature range of -65°C ~ 250°C provides defined thermal performance boundaries. The temperature coefficient of ±30ppm/°C is slightly higher than the Ohmite part but remains within acceptable precision tolerances for most applications requiring ±1% resistors.

Both parts share identical electrical specifications (2 kOhms, ±1%, 3W wirewound), axial package configuration, and EAR99 export classification. Selection between these parts should be based on compliance requirements, physical space availability, and thermal operating conditions specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale ALSR032K000FE12 be used as a direct replacement for the Ohmite 43F2K0?

A: Yes. Both parts have identical resistance (2 kOhms), tolerance (±1%), power rating (3W), and wirewound axial construction. The ALSR032K000FE12 is electrically and mechanically compatible. Physical dimensions differ slightly, with the Vishay part being smaller. Verify that board layout accommodates the smaller size and that RoHS compliance requirements align with your application.

Q: What is the difference in temperature coefficient between these parts?

A: The Ohmite 43F2K0 has a temperature coefficient of ±20ppm/°C, while the Vishay Dale ALSR032K000FE12 has ±30ppm/°C. For applications requiring high precision across temperature ranges, the Ohmite part offers tighter temperature stability. However, both coefficients are acceptable for standard precision resistor applications.

Q: Are there physical size constraints I should consider?

A: Yes. The Ohmite 43F2K0 measures 0.220" Dia x 0.594" L (5.60mm x 15.10mm), while the Vishay Dale ALSR032K000FE12 measures 0.180" Dia x 0.500" L (4.57mm x 12.70mm). The Vishay part is smaller in both diameter and length. Verify that your PCB layout and component placement accommodate the selected part's dimensions.

Q: What is the significance of RoHS compliance in this substitution?

A: The Ohmite 43F2K0 is RoHS non-compliant, while the Vishay Dale ALSR032K000FE12 is ROHS3 compliant. If your application or end-market requires RoHS compliance, the Vishay part is the appropriate selection. If RoHS compliance is not a requirement, either part is acceptable.

Q: Are both parts available in the same packaging format?

A: Both parts use axial through-hole packaging with 2 terminations. The Ohmite part is available in bulk packaging, while the Vishay part is also available in bulk. Both are suitable for standard PCB assembly processes using through-hole insertion methods.