Ohmite 43F2K5 Equivalent & Substitute Parts

Part Overview

The Ohmite 43F2K5 is a 2.5 kOhms ±1% 3W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is currently active in production with 871 pieces in stock. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility to support procurement flexibility and supply chain continuity.

Substiute Parts

43F2K5

OhmiteIn Stock: 94743F2K5 Datasheet

Current PartRFQ

ALSR032K500FE12

Vishay DaleIn Stock: 888ALSR032K500FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Ohmite 43F2K5 are qualified based on the following critical parameters:

• Resistance value: 2.5 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 3W (exact match required)
• Package type: Axial (exact match required)
• Composition: Wirewound (exact match required)
• Number of terminations: 2 (exact match required)

The Vishay Dale ALSR032K500FE12 meets all substitution criteria. While dimensional and temperature coefficient specifications differ slightly, the electrical performance and mechanical interface remain functionally equivalent for applications requiring the specified resistance, tolerance, and power handling characteristics.

Parameter Comparison

Engineering Selection Recommendations

The Vishay Dale ALSR032K500FE12 is a direct electrical substitute for the Ohmite 43F2K5. Both components deliver identical resistance, tolerance, and power specifications required for circuit functionality.

The Vishay Dale part offers ROHS3 compliance, whereas the Ohmite part is RoHS non-compliant. Selection between these parts should account for regulatory requirements and end-product compliance mandates.

The Vishay Dale ALSR032K500FE12 features moisture-resistant construction and a defined operating temperature range of -65°C to 250°C, providing additional environmental protection compared to the Ohmite specification. The slightly smaller physical dimensions of the Vishay Dale part may affect board layout considerations in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale ALSR032K500FE12 be used as a direct replacement for the Ohmite 43F2K5?

A: Yes. Both parts share identical electrical specifications: 2.5 kOhms resistance, ±1% tolerance, and 3W power rating. The axial package and wirewound composition ensure mechanical and functional compatibility. Physical dimensions differ slightly; verify clearance in your specific board layout.

Q: What are the key differences between these parts?

A: The primary differences are RoHS compliance status, physical dimensions, temperature coefficient (±20ppm/°C vs. ±30ppm/°C), and moisture resistance features. The Vishay Dale part includes moisture-resistant construction and a specified operating temperature range.

Q: Does the smaller size of the Vishay Dale part affect circuit performance?

A: No. Physical dimensions do not affect electrical performance. The smaller form factor may provide layout advantages but requires verification of available board space and component clearance.

Q: Are there any compliance considerations when substituting these parts?

A: Yes. The Ohmite 43F2K5 is RoHS non-compliant, while the Vishay Dale ALSR032K500FE12 is ROHS3 compliant. Regulatory requirements for your application will determine which part is appropriate.

Q: What is the temperature coefficient difference, and does it matter?

A: The Ohmite part specifies ±20ppm/°C while the Vishay Dale part specifies ±30ppm/°C. For most general-purpose applications, this difference is negligible. Applications requiring tight temperature stability should evaluate this parameter against circuit requirements.