Ohmite 43F2R2 Equivalent & Substitute Parts

Part Overview

The Ohmite 43F2R2 is a 2.2 Ohms ±1% 3W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production and maintains 827 pieces in new original stock. The primary reason for identifying substitute parts is to ensure supply chain continuity, accommodate packaging preferences, or address RoHS compliance requirements in applications where non-compliant components cannot be used.

Substiute Parts

43F2R2

OhmiteIn Stock: 87143F2R2 Datasheet

Current PartRFQ

43F2R2E

OhmiteIn Stock: 145443F2R2E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 43F2R2E qualifies as a parametric equivalent based on identical electrical and mechanical specifications. Substitution is valid when the following criteria are met:

• Resistance value: 2.2 Ohms (exact match)
• Tolerance: ±1% (exact match)
• Power rating: 3W (exact match)
• Composition: Wirewound (exact match)
• Package: Axial (exact match)
• Temperature coefficient: ±50ppm/°C (exact match)
• Physical dimensions: 0.220" Dia x 0.594" L (exact match)

The primary difference between the main part and substitute is packaging format (tape/reel versus bulk) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the 43F2R2 and 43F2R2E are electrically and mechanically identical Ohmicone® 40 series wirewound resistors. Selection between these parts should be based on the following criteria:

Use the 43F2R2 when tape/reel packaging is required for automated assembly processes and RoHS non-compliant components are acceptable in your application.

Use the 43F2R2E when ROHS3 compliance is mandated by design requirements, regulatory standards, or customer specifications. The bulk packaging format of the 43F2R2E may require manual handling or repackaging for automated placement equipment.

Both parts maintain active production status and are available in adequate inventory quantities.

Frequently Asked Questions (FAQ)

Q: Are the 43F2R2 and 43F2R2E electrically interchangeable?

A: Yes. Both parts have identical resistance (2.2 Ohms), tolerance (±1%), power rating (3W), temperature coefficient (±50ppm/°C), and wirewound composition. They will perform identically in any circuit application.

Q: What is the difference between these two part numbers?

A: The primary differences are packaging format and RoHS compliance status. The 43F2R2 is supplied in tape/reel format and is RoHS non-compliant. The 43F2R2E is supplied in bulk packaging and is ROHS3 compliant.

Q: Can I use the 43F2R2E in place of the 43F2R2 in automated assembly?

A: The 43F2R2E's bulk packaging may not be compatible with tape-fed pick-and-place equipment. If your assembly process requires tape/reel format, the 43F2R2 is the appropriate choice. If your process can accommodate bulk components or manual placement, the 43F2R2E is suitable.

Q: Which part should I select for a new design?

A: Selection depends on your RoHS compliance requirements and assembly process capabilities. If ROHS3 compliance is required, use 43F2R2E. If RoHS non-compliant components are acceptable and tape/reel packaging is needed, use 43F2R2.

Q: Are the physical dimensions identical?

A: Yes. Both parts have identical axial dimensions of 0.220" diameter by 0.594" length (5.60mm x 15.10mm), ensuring identical PCB footprint and mounting characteristics.