Equivalent & Substitute Parts for Ohmite 43F3K3

Part Overview

The Ohmite 43F3K3 is a 3.3 kOhms ±1% 3W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production and widely used in applications requiring precision resistive elements with high power dissipation capability. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

43F3K3

OhmiteIn Stock: 91443F3K3 Datasheet

Current PartRFQ

43F3K3E

OhmiteIn Stock: 112443F3K3E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 43F3K3 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

• Resistance value: 3.3 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Physical dimensions: 0.220" Dia x 0.594" L (exact match required)
• Termination count: 2 (exact match required)

The 43F3K3E meets all substitution criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the 43F3K3 and 43F3K3E are active production components from Ohmite's Ohmicone® 40 series. The primary distinction between these parts is regulatory compliance status and packaging format.

The 43F3K3 is RoHS non-compliant, while the 43F3K3E is ROHS3 compliant. For applications subject to RoHS directives or environmental regulations requiring lead-free construction, the 43F3K3E is the appropriate selection. The 43F3K3 remains suitable for applications without such regulatory constraints.

Packaging differs between the two parts: the 43F3K3 is supplied in box packaging, while the 43F3K3E is supplied in bulk packaging. This distinction affects procurement and handling procedures but does not impact electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can the 43F3K3E be used as a direct replacement for the 43F3K3?

A: Yes. Both parts are electrically and mechanically identical, with matching resistance, tolerance, power rating, temperature coefficient, and physical dimensions. The primary differences are RoHS compliance status and packaging format.

Q: What is the significance of the RoHS compliance difference?

A: RoHS3 compliance indicates the 43F3K3E meets current environmental and safety regulations restricting hazardous substances. The 43F3K3 does not meet these requirements. Selection depends on regulatory requirements applicable to your application and end market.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts measure 0.220" diameter by 0.594" length (5.60mm x 15.10mm) and use identical axial package construction. They are mechanically interchangeable in PCB layouts and through-hole applications.

Q: Does packaging format affect component performance?

A: No. Box and bulk packaging formats do not affect electrical performance, reliability, or mechanical fit. Packaging selection is determined by procurement volume and handling requirements.

Q: Are both parts currently in production?

A: Yes. Both the 43F3K3 and 43F3K3E maintain active product status with Ohmite.