Ohmite 40F3K3 Equivalent & Substitute Parts

Part Overview

The Ohmite 40F3K3 is a 3.3 kOhms ±1% 10W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently in active production status. Substitute parts are identified when equivalent electrical and mechanical parameters are required for applications where the original part number is unavailable or when alternative packaging or compliance requirements necessitate component replacement.

Substiute Parts

40F3K3

OhmiteIn Stock: 101340F3K3 Datasheet

Current PartRFQ

40F3K3E

OhmiteIn Stock: 91940F3K3E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 40F3K3 are identified based on matching the following critical parameters: resistance value (3.3 kOhms), tolerance (±1%), power rating (10W), composition (wirewound), package type (axial), temperature coefficient (±20ppm/°C), and physical dimensions (0.406" Dia x 1.902" L). The 40F3K3E meets all these electrical and mechanical specifications and is therefore classified as a parametric equivalent. Packaging configuration differences (tape and reel versus bulk) do not affect functional compatibility in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The 40F3K3E serves as a direct parametric equivalent to the 40F3K3, with identical electrical and mechanical specifications. The primary distinction is RoHS compliance status: the 40F3K3E is ROHS3 compliant, while the 40F3K3 is RoHS non-compliant. Selection between these parts should be based on regulatory requirements applicable to the end application. Both parts maintain active production status and are available from inventory. The 40F3K3E is available in bulk packaging, while the 40F3K3 standard packaging configuration is specified separately.

Frequently Asked Questions (FAQ)

Q: Can the 40F3K3E replace the 40F3K3 in existing designs? A: Yes. The 40F3K3E is electrically and mechanically identical to the 40F3K3, with matching resistance, tolerance, power rating, temperature coefficient, and physical dimensions. Substitution is valid from a functional standpoint.

Q: What is the difference between these two part numbers? A: The primary difference is RoHS compliance certification. The 40F3K3E is ROHS3 compliant, while the 40F3K3 is RoHS non-compliant. Packaging configuration also differs (bulk versus standard). All electrical and mechanical parameters are identical.

Q: Does packaging type affect circuit performance? A: No. Packaging configuration (bulk versus tape and reel) does not affect electrical performance or mechanical fit. Both parts use identical axial wirewound construction with the same physical dimensions.

Q: Are both parts currently available? A: Yes. Both the 40F3K3 (1002 pcs) and 40F3K3E (862 pcs) are listed as active products with current inventory availability.

Q: Which part should I select for new designs? A: Selection depends on regulatory compliance requirements. For applications requiring RoHS3 compliance, specify the 40F3K3E. For applications without RoHS requirements, either part is functionally equivalent.